CN112192045A - Laser cutting method for light adjusting film or electrode thereof - Google Patents
Laser cutting method for light adjusting film or electrode thereof Download PDFInfo
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- CN112192045A CN112192045A CN202011079289.2A CN202011079289A CN112192045A CN 112192045 A CN112192045 A CN 112192045A CN 202011079289 A CN202011079289 A CN 202011079289A CN 112192045 A CN112192045 A CN 112192045A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
Abstract
The invention relates to a laser cutting method of a light adjusting film or an electrode thereof, which is implemented on a laser cutting device and comprises a laser emitter, a first steering mirror, a second steering mirror, a third steering mirror and a laser head; the method comprises the following steps: placing a light adjusting film or a light adjusting film electrode on the cutting table; the laser emitter is started, the second steering mirror moves along the second light path and/or the third steering mirror moves along the third light path, so that laser coming out of the laser head cuts the light adjusting film or the light adjusting film electrode along a preset cutting line, and the preset cutting line is a straight line, a multi-line segment and/or a curve. The invention can realize various cutting shapes of the light adjusting film or the electrode thereof, and has small cutting error.
Description
Technical Field
The invention relates to the field of manufacturing of a light modulation film, in particular to a method for manufacturing the light modulation film or an electrode thereof by laser cutting.
Background
In recent years, with the development of liquid crystal technology, more intelligent color-changing films have been developed. The most common intelligent light-adjusting films at present are electrochromic light-adjusting films and thermochromic light-adjusting films. The electrochromic dimming film product can be normally used only by manufacturing electrodes and connecting a power supply. The electrode includes an OCA conductive film, an ITO conductive film, a nano silver conductive film, or the like, and is generally formed by plating, depositing a conductive material, or the like on a plastic film such as a PET film. In order to prepare a light modulation film with a required size, an electrode is generally required to be cut, and at present, electrodes are basically manufactured manually by adopting an electrode knife in the market, wherein a light modulation film electrode knife disclosed in Chinese patent document CN201921979885.9, a light modulation film electrode edging knife disclosed in CN201821357556.6, a light modulation film electrode knife disclosed in CN201620093482.4 and the like are all devices capable of manufacturing electrodes of electrochromic light modulation film products. However, these devices still have to be cut by hand to form the dimming film electrode, which causes many problems. For example, the operator is unskilled in the technique, and the electrode cutting is not uniform when the length of the electrode is more than 1000 mm; in addition, the electrode manufactured by the cutting knife has the phenomena of burrs and unevenness at the cutting part, so that the product quality cannot be improved; and the manual electrode cutting efficiency is low, so that the large-scale production of sheet products cannot be carried out.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a laser cutting method of a light modulation film or an electrode thereof, which has the advantages of non-contact cutting with materials, smooth cutting edge, no scorching or yellowing, high cutting precision and capability of realizing curve, multi-segment line and straight line cutting.
In order to realize the aim of the invention, the invention provides a laser cutting method of a light adjusting film or an electrode thereof, which is implemented on a laser cutting device, wherein the laser cutting device comprises a laser emitter, a first steering mirror, a second steering mirror, a third steering mirror, a laser head and a cutting table board; the first steering mirror is arranged on a first light path formed by laser emitted by the laser emitter; the second steering mirror is arranged on a second light path formed by steering the laser through the first steering mirror; the third steering mirror is arranged on a third light path formed by the laser through the steering of the second steering mirror; the laser head is arranged on a fourth light path formed by the laser through the turning of the third turning mirror; the laser head faces the cutting table top, the laser head is connected with a third steering mirror, the third steering mirror can be connected with a second steering mirror in a reciprocating mode along a third light path, the second steering mirror can be connected with a first steering mirror in a reciprocating mode along a second light path, and a fourth light path is not parallel to the plane where the second light path and the third light path are located; the method comprises the following steps: placing a light adjusting film or a light adjusting film electrode on the cutting table; the laser emitter is started, the second steering mirror moves along the second light path and/or the third steering mirror moves along the third light path, so that laser coming out of the laser head cuts the light adjusting film or the light adjusting film electrode along a preset cutting line, and the preset cutting line is a straight line, a multi-line segment and/or a curve.
The further technical scheme is that the laser from the laser head cuts the dimming film or the dimming film electrode for one time along a preset cutting line; or the laser from the laser head cuts the dimming film or the dimming film electrode for multiple times along a preset cutting line, and the moving speed of the second steering mirror, the moving speed of the third steering mirror and/or the power of the laser emitter are the same or different during each cutting.
The further technical scheme is that before cutting, the aperture of an emission hole of the laser emitter, the power of the laser emitter, the moving speed of the second steering mirror, the moving speed of the third steering mirror and/or the cutting times are adjusted according to the material and the thickness of the dimming film or the dimming film electrode.
The further technical scheme is that in the cutting process, the laser cutting device automatically adjusts the moving speed of the second steering mirror, the moving speed of the third steering mirror and/or the power of the laser emitter according to the curvature of a preset cutting line.
The further technical scheme is that the electrode of the light adjusting film or the light adjusting film electrode is an OCA conductive film, an ITO conductive film or a nano silver conductive film.
The further technical scheme is that the first light path is vertical to the second light path, the second light path is vertical to the third light path, and the fourth light path is vertical to the plane where the second light path and the third light path are located.
The laser cutting device further comprises a controller, wherein the controller controls the opening and closing and/or the transmitting power of the laser transmitter, controls the second steering mirror to move along the second light path and controls the third steering mirror to move along the third light path.
The further technical scheme is that the controller stores preset control information; or the laser cutting device is also provided with a receiver, the receiver is used for receiving a user instruction, and the controller controls the laser transmitter to work and the second steering mirror and the third steering mirror to move according to the user instruction.
The further technical proposal is that the laser emitter is CO2A laser or an ultraviolet laser; the laser emitter is connected with a laser power supply; the laser cutting device also comprises a cooling system, and the cooling system is an air cooling system or a water cooling system; the method includes the cooling system reducing the temperature of the laser emitter.
The technical scheme is that the device still includes the cooling system that cuts, cuts cooling system and connects the laser head, cuts cooling system and includes gas outlet, and gas outlet is towards the below of laser head, and the method still includes: during the cutting process, the gas outlet provides at least one of nitrogen, argon or air, and the gas pressure is more than 0MPa and not more than 10 MPa.
The device further comprises a dust removal smoking system and a waste collection box, wherein the dust removal smoking system is connected with the laser head and comprises a suction port, one end of the suction port faces to the lower part of the laser head, and the other end of the suction port is communicated with the waste collection box; the method further comprises the following steps: during the cutting process, the suction port sucks waste gas and waste materials.
The laser cutting device further comprises a first guide rail and a second guide rail; the first guide rail is parallel to the second light path, the first steering mirror is fixedly connected to the first guide rail, and the second steering mirror is movably connected to the first guide rail along the first guide rail; the second guide rail is parallel to the third light path, the second steering mirror is fixedly connected with the second guide rail, and the third steering mirror is movably connected to the second guide rail along the second guide rail.
The laser head further comprises a focusing mirror, and the focusing mirror is used for focusing the laser which is turned by the third turning mirror.
The further technical proposal is that the cutting table top is an aluminum table top, a marble table top or a steel table top.
Compared with the prior art, the invention can obtain the following beneficial effects:
the laser cutting method provided by the invention integrates the light path and the transmission into a whole, mainly utilizes the high molecular energy generated by laser to trigger the heat energy to gasify the cut product, can realize the non-contact cutting of the light modulation film or the electrode thereof and the material, has the advantages of full-automatic cutting, high cutting efficiency and small cutting size error, can cut different types of electrodes such as curve type, linear type and zigzag type, and overcomes the defects that the existing electrode knife has burrs and is not uniform and only can cut a single linear shape. The invention can automatically complete laser cutting and realize mass carving/cutting production.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus used in an embodiment of the laser cutting method of the present invention.
FIG. 2 is a schematic structural diagram of a laser head in operation in an embodiment of the laser cutting method of the present invention.
Fig. 3 is a schematic structural diagram of a laser head cutting light modulation membrane electrode in the embodiment of the laser cutting method.
Fig. 4 is a schematic structural diagram of a laser head cutting light adjusting film in the embodiment of the laser cutting method.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Detailed Description
As shown in fig. 1 to 4, the laser cutting method of the present embodiment is performed on a laser cutting apparatus including a laser emitter 1, a first turning mirror 2, a second turning mirror 3, a third turning mirror 4, a laser head 5, and a cutting table 6. The first steering mirror 2 is arranged on a first light path 7 formed by laser emitted by the laser emitter 1, the second steering mirror 2 is arranged on a second light path 8 formed by the laser through the steering of the first steering mirror 2, the third steering mirror 4 is arranged on a third light path 9 formed by the laser through the steering of the second steering mirror 3, and the laser head 5 is arranged on a fourth light path 10 formed by the laser through the steering of the third steering mirror 4. Namely, after being emitted by the laser emitter 1, the laser is sequentially turned by the first turning mirror 2, the second turning mirror 3 and the third turning mirror 4 and finally emitted by the laser head 5. Preferably, the laser head 5 is connected to the third turning mirror 4, for example the laser head 5 is directly connected to the third turning mirror 4. The laser head 5 comprises a focusing mirror 11, the focusing mirror 11 focuses laser on the fourth light path 10 and then emits the laser from the laser head 5, the intensity of the laser beam is increased, and energy is concentrated.
The cutting table 6 is an aluminum table, a marble table, a steel table, or other table, and the cutting table 6 is preferably flat, for example, by high precision flat water milling to improve the cutting precision. The cutting table 6 is used to place a light adjusting film 12 or a light adjusting film electrode 13, and the light adjusting film 12 generally includes two light adjusting film electrodes 13 and a polymer dispersed liquid crystal 20 sandwiched between the two light adjusting film electrodes 13. That is, the device and method of the present embodiment or the present invention can be used for cutting the light adjusting film 12, and also can be used for cutting the light adjusting film electrode 13. The laser head 5 faces the cutting stage 6, thereby cutting the light adjusting film 12 or the light adjusting film electrode 13 placed on the cutting stage 6.
The third redirecting mirror 4 is connected to the second redirecting mirror 3 so as to be movable back and forth along a third light path 9, and the second redirecting mirror 3 is connected to the first redirecting mirror 2 so as to be movable back and forth along a second light path 8. In this embodiment the device further comprises a first guide 14 and a second guide 15, the first guide 14 being parallel to the second light path 8, the first turning mirror 2 being fixedly connected to the first guide 14, the second turning mirror 3 being movably connected to the first guide 14 along the first guide 14, for example movably connected to the first guide 14 via the second guide 15 connected to the second turning mirror 3. The second guide 15 is parallel to the third beam path 9, the second redirecting mirror 3 is fixedly connected to the second guide 15, and the third redirecting mirror 4 is movably connected to the second guide 15 along the second guide 15. For example, the second steering mirror 3 can be moved on the first rail 14 by an existing drive device such as a motor, a cylinder, etc., and the third steering mirror 4 can be moved on the second rail 15 by an existing drive device such as a motor, a cylinder, etc. The laser head 5 moves along a straight line, a curve line or a broken line on the plane where the third light path 9 and the second light path 8 are located through the movement of the second steering mirror 3 and the third steering mirror 4.
The fourth optical path 10 is not parallel to the plane where the second optical path 8 and the third optical path 9 are located, that is, the fourth optical path 10 can be perpendicular to or inclined to the plane where the second optical path 8 and the third optical path 9 are located, so that when the laser head 5 moves along a straight line, a curve or a broken line on the plane where the third optical path 9 and the second optical path 8 are located, the laser emitted from the fourth optical path 10 can also cut the dimming film 12 or the dimming film electrode 13 of the cutting table top 6 along the straight line, the curve or the broken line through the laser head 5. Preferably, the first light path 7 is perpendicular to the second light path 8, the second light path 8 is perpendicular to the third light path 9, the fourth light path 10 is perpendicular to the plane where the second light path 8 and the third light path 9 are located, and the cutting table 6 is parallel to the plane where the second light path 8 and the third light path 9 are located. The arrangement can ensure that the layout of each component is more reasonable, and the laser vertically irradiates the light adjusting film 12 or the light adjusting film electrode 13, so that the movement of the second steering mirror 3 and the third steering mirror 4 can be more conveniently controlled according to the required light adjusting film or the electrode cutting shape thereof.
The device further comprises a controller 16, wherein the controller 16 is used for controlling the on-off and/or the transmitting power of the laser transmitter 1, controlling the second steering mirror 3 to move along the second light path 8 and controlling the third steering mirror 4 to move along the third light path 9. The controller 16 may be provided with a storage medium storing preset control information, for example, the preset control information may be programmed and charted by software such as computer CAD, coreldaw, etc., and directly introduced into the device, or may be subjected to CNC data transmission formats such as dxf, plt, bmp, etc., and the controller 16 may be operated by being separated from the computer. Alternatively, the device further comprises a receiver 17, the receiver 17 may be a control screen, for example, and is used for receiving a user instruction and transmitting a signal of the user instruction to the controller 16, and the controller 16 receives the signal and controls the operation of the laser transmitter 1 and the movement of the second steering mirror 3 and the third steering mirror 4 according to the signal. The control screen may have a liquid crystal chinese/english display interface.
The laser emitter 1 may be CO2Laser, e.g. all-metal sealed radio frequency CO2The laser, the ultraviolet laser or other existing emitting devices with laser etching functions have emitting power which can be selected according to the requirements of product types without requirements. The cutting is carried out by laser, so that the cutting edge is smooth, is not scorched or yellowed, the cutting precision is higher, and the cutting edge can be cut by laserDifferent power settings are made depending on the thickness of the conductive film.
The laser transmitter 1 is connected to a laser power supply 18. The device also comprises a cooling system 19, wherein the cooling system 19 is used for reducing the temperature of the laser emitter, and the cooling system 19 can be an air cooling system or a water cooling system.
The device still includes and cuts cooling system (not shown in the figure), cuts cooling system and connects laser head 5, can remove along with laser head 5, cuts cooling system and includes the gas outlet, and the gas outlet is towards the below of laser head 5, and the gas outlet provides at least one in nitrogen gas, argon gas or compressed air, and atmospheric pressure can be greater than 0MPa and not more than 10 MPa. The cutting and cooling system can reduce the ablation degree of the cutting part of the product in the cutting process.
The device also comprises a dust removal smoking system and a waste collection box (not shown in the figure), wherein the dust removal smoking system is connected with the laser head 5 and can move along with the laser head 5, the dust removal smoking system comprises a suction port, for example, a cover-shaped suction port is formed and covers the laser head 5, one end of the suction port faces to the lower part of the laser head 5, and the other end of the suction port is communicated with the waste collection box. The dust removal and smoke extraction system and the waste material collection box are used for timely discharging waste gas and cleaning waste materials, and a good working environment is kept.
The laser cutting device of the embodiment can realize laser cutting of the light adjusting film 12 or the electrode 13 thereof, and specifically the laser cutting method is as follows:
a light adjusting film 12 or a light adjusting film electrode 13 is placed on the cutting table top 6, and the electrode of the light adjusting film 12 or the light adjusting film electrode 13 can be an OCA conductive film, an ITO conductive film or a nano silver conductive film.
The laser emitter 1 is started, the third steering mirror 4 moves along the third light path 9 and/or the second steering mirror 3 moves along the second light path 8, so that the laser head 5 cuts the dimming film 12 or the dimming film electrode 13 along a straight line, a multi-line segment and/or a curve. This step is performed automatically, for example, under the control of the controller 16. In this step, the third turning mirror 4 can move back and forth along the third optical path 9 and/or the second turning mirror 3 can move back and forth along the second optical path 8, so that the laser heads 5 can cut the dimming film 12 or the dimming film electrode 13 for multiple times, and the laser head is particularly suitable for the case that the thickness of the dimming film 12 or the dimming film electrode 13 is large.
Preferably, during the cutting process, the device automatically adjusts the moving speed of the third steering mirror 4, the moving speed of the second steering mirror 3 and/or the power of the laser emitter 1 according to the curvature, so that the light adjusting film 12 or the light adjusting film electrode 13 can be uniformly cut. For example, in cutting one of the light adjusting film 12 or the light adjusting film electrode 13, when a straight line (curvature is 0) is cut, only the movement of the third steering mirror 4 or the movement of the second steering mirror 3, a smaller laser emission power can be used for cutting, or a faster moving speed; when a curve is cut (curvature is not zero), the third turning mirror 4 and the second turning mirror 3 move simultaneously, if the same moving speed as that of cutting a straight line is adopted, the moving distance in unit time is increased, the laser cutting intensity in unit distance may be insufficient, and at this time, a larger laser emission power and a slower moving speed can be adopted to maintain uniform cutting. When cutting different membrane of adjusting luminance 12 or membrane electrode 13, before the cutting, can select suitable laser emission power or moving speed according to membrane of adjusting luminance 12 or membrane electrode 13's thickness or material, for example can increase laser emission power when thickness is great, or slow down moving speed, also can adjust the size in laser emission hole to the thickness of adjustment laser beam.
The following specific examples are provided to illustrate the laser cutting method described above:
example 1
Cutting at one time: selecting a transmitter with laser power of 60W and using CO2And (3) cutting by a laser emitter at the cutting speed of 800mm/s under the air pressure of 1MPa by selecting nitrogen.
Example 2
Cutting for multiple times: in order to ensure that the PET on the upper layer of the product electrode is cut and separated, a method of cutting for multiple times can be adopted.
Firstly, selecting a transmitter with laser power of 60W, and adopting CO at this time2Cutting with a laser emitter at a cutting speed of 800mm/s, nitrogen gas pressure, and a discharge pressure of 1MPa, adjusting the power between 0 and 100%, and cutting for a second time, for example, with a 50% emission powerThe cutting was carried out at a speed of 300 mm/s. The laser emission power and the cutting speed can be adjusted according to requirements, and the third cutting and the fourth cutting can be performed without limitation.
The method has the advantages of fine processing lines (less than 0.06mm), attractive drawn lines, realization of cutting speed of 0-10 m/s, cutting precision of 0-1 mm, repeated positioning precision of 0-0.1 mm, and no node generation during cutting. The CAD color separation and layered output can be realized by adopting software, a controller with the software has the functions of S curve automatic acceleration and deceleration, automatic adjustment of laser energy along with speed change and the like, and straight, multi-segment and continuous rotary curve cutting has no jitter, no sawtooth, no noise, narrow and uniform cutting seams, sharp cutting angles, straight, flat and smooth arc surfaces.
Finally, it should be emphasized that the above-described embodiments are merely preferred examples of the invention, which is not intended to limit the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A laser cutting method of a light adjusting film or an electrode thereof is characterized in that:
the method is implemented on a laser cutting device, wherein the laser cutting device comprises a laser emitter, a first steering mirror, a second steering mirror, a third steering mirror, a laser head and a cutting table board; the first steering mirror is arranged on a first light path formed by laser emitted by the laser emitter; the second steering mirror is arranged on a second light path formed by steering the laser through the first steering mirror; the third steering mirror is arranged on a third light path formed by steering the laser through the second steering mirror; the laser head is arranged on a fourth light path formed by the laser through the turning of the third turning mirror; the laser head faces the cutting table top, the laser head is connected with a third steering mirror, the third steering mirror can be connected with a second steering mirror in a reciprocating mode along a third light path, the second steering mirror can be connected with a first steering mirror in a reciprocating mode along a second light path, and the fourth light path is not parallel to the plane where the second light path and the third light path are located;
the method comprises the following steps:
placing a light adjusting film or a light adjusting film electrode on the cutting table top;
the laser emitter is started, the second steering mirror moves along the second light path and/or the third steering mirror moves along the third light path, so that laser coming out of the laser head cuts the dimming film or the dimming film electrode along a preset cutting line, and the preset cutting line is a straight line, a multi-line segment and/or a curve.
2. The laser cutting method of a light adjusting film or an electrode thereof according to claim 1, characterized in that:
the laser from the laser head carries out primary cutting on the dimming film or the dimming film electrode along the preset cutting line; or the laser from the laser head cuts the dimming film or the dimming film electrode for multiple times along the preset cutting line, and the moving speed of the second steering mirror, the moving speed of the third steering mirror and/or the power of the laser emitter are the same or different during each cutting.
3. The laser cutting method of a light adjusting film or an electrode thereof according to claim 2, characterized in that:
before cutting, the aperture of an emission hole of the laser emitter, the power of the laser emitter, the moving speed of the second steering mirror, the moving speed of the third steering mirror and/or the cutting times are adjusted according to the material and the thickness of the dimming film or the dimming film electrode.
4. The laser cutting method of a light adjusting film or an electrode thereof according to claim 1, characterized in that:
in the cutting process, the laser cutting device automatically adjusts the moving speed of the second steering mirror, the moving speed of the third steering mirror and/or the power of the laser emitter according to the curvature of the preset cutting line.
5. The laser cutting method of a light adjusting film or an electrode thereof according to claim 1, characterized in that:
the electrode of the light adjusting film or the light adjusting film electrode is an OCA conductive film, an ITO conductive film or a nano silver conductive film.
6. The laser cutting method of a light adjusting film or an electrode thereof according to any one of claims 1 to 5, characterized in that:
the first light path is perpendicular to the second light path, the second light path is perpendicular to the third light path, and the fourth light path is perpendicular to a plane where the second light path and the third light path are located.
7. The laser cutting method of a light adjusting film or an electrode thereof according to any one of claims 1 to 5, characterized in that:
the laser cutting device further comprises a controller, wherein the controller controls the opening and closing and/or the transmitting power of the laser transmitter, controls the second steering mirror to move along the second light path and controls the third steering mirror to move along the third light path;
the controller stores preset control information; or, the laser cutting device further comprises a receiver, the receiver is used for receiving a user instruction, and the controller controls the laser transmitter to work and the second steering mirror and the third steering mirror to move according to the user instruction.
8. The laser cutting method of a light adjusting film or an electrode thereof according to any one of claims 1 to 5, characterized in that:
the laser emitter is CO2A laser or an ultraviolet laser; the laser transmitter is connected with a laser power supply; the laser cutting device further comprises a cooling system, the cooling system is an air cooling system or a water cooling system, and the method comprises the step that the cooling system reduces the temperature of the laser emitter.
9. The laser cutting method of a light adjusting film or an electrode thereof according to any one of claims 1 to 5, characterized in that:
the device still includes the cooling system that cuts, the cooling system that cuts connects the laser head, the cooling system that cuts includes gas outlet, gas outlet orientation the below of laser head, the method still includes: during cutting, the gas outlet provides at least one of nitrogen, argon or air, and the gas pressure is more than 0MPa and not more than 10 MPa;
the device also comprises a dust removal smoking system and a waste collection box, wherein the dust removal smoking system is connected with the laser head and comprises a suction port, one end of the suction port faces to the lower part of the laser head, and the other end of the suction port is communicated with the waste collection box; the method further comprises the following steps: during the cutting process, the suction port sucks waste gas and waste materials.
10. The laser cutting method of a light adjusting film or an electrode thereof according to any one of claims 1 to 5, characterized in that:
the laser cutting device further comprises a first guide rail and a second guide rail; the first guide rail is parallel to the second light path, the first steering mirror is fixedly connected to the first guide rail, and the second steering mirror is movably connected to the first guide rail along the first guide rail; the second guide rail is parallel to the third light path, the second steering mirror is fixedly connected with the second guide rail, and the third steering mirror is movably connected to the second guide rail along the second guide rail;
the laser head also comprises a focusing mirror, and the focusing mirror is used for focusing the laser which is turned by the third turning mirror;
the cutting table top is an aluminum table top, a marble table top or a steel table top.
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| CN202011079289.2A CN112192045A (en) | 2020-10-10 | 2020-10-10 | Laser cutting method for light adjusting film or electrode thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113253496A (en) * | 2021-05-31 | 2021-08-13 | 扬州晶彩光电科技有限公司 | Liquid crystal light adjusting film multi-path electrode control process |
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