baber/WOPTO huggingface dataset:
Patent WO-2020056954-A1 (WO)
Inventor: LIU HUA
IPC: H01L23/367
Filed: 2018-12-19
Abstract: The present application relates to a mechanism for cooling a module by means of immersion, and a frequency converter. The mechanism for cooling a module by means of immersion comprises a module and a cold plate. The cold plate is provided with a chamber for containing a cooling liquid. The module is partially embedded in the cold plate, and can be immersed in the cooling liquid in the cold plate. The module is partially embedded in the chamber of the cold plate, such that the module can be partially immersed in the cooling liquid in the chamber, thereby enlarging a heat dissipation area of the module, improving heat exchange efficiency, and extending the service life of the module.
Patent WO-2020019644-A1 (WO)
Title: Industrial vehicle
Inventor: LIU XIAODONG
IPC: B66F9/075
Filed: 2018-12-19
Abstract: Disclosed is an industrial vehicle, comprising a handle (32), a main vehicle chassis (2), and a drive wheel assembly (33), a vertical column (1) being arranged on the main vehicle chassis (2), the vertical column (1) comprising an upper top plate (11) and a back plate (13) connected to the upper top plate (11); the industrial vehicle also comprises a controller (52), a pump station (53), and a jacking apparatus (51) abutting the upper top plate (11); the jacking apparatus (51) is closer to the back plate (13) than the controller (52) and the pump station (53). The present industrial vehicle has high stability and stable lifting, optimises the positional relationship of the components of the vehicle, and has a shorter vehicle body, thereby enabling a smaller turning radius.
Patent WO-2019144741-A1 (WO)
Inventor: LIU GUANGWAN
IPC: A61L31/12
Filed: 2018-12-25
Abstract: 一种复合支架材料及其制备方法和用途。该复合支架材料包括带有电荷的纤维骨架材料，在该纤维骨架材料上通过静电引力包覆有交替叠加的正电荷生物相容性材料和负电荷生物相容性材料。该复合材料提高了亲水性、生物相容性、组织细胞粘附性和生物诱导活性，适用于组织黏附、封闭、堵漏、止血、隔离、修复、防止粘连，还可以用于制备药物载体及组织工程支架材料。
Patent WO-2019144805-A1 (WO)
Inventor: ZHU JIAWANG
IPC: C07D497/04
Filed: 2019-01-10
Abstract: L'invention concerne un composé phényléthylamine substitué en tant qu'agoniste du récepteur μ-opioïde, une composition pharmaceutique le comprenant, son procédé de préparation et son utilisation pour prévenir et/ou traiter des maladies associées au récepteur μ-opioïde (y compris, mais sans s'y limiter, des maladies douloureuses).
Patent WO-2019154261-A1 (WO)
Title: Pyridine derivative related to kmd5 pathway
Inventor: YANG YAXUN
IPC: A61P35/00
Filed: 2019-01-31
Abstract: Disclosed is a class of pyridine derivatives, and specifically disclosed are compounds as shown in formula (Ⅲ) and pharmaceutically acceptable salts thereof.
Patent WO-2020155315-A1 (WO)
Title: 一种高压软硬管路连接密封系统
Inventor: TAN SHILI
IPC: F16L33/02
Filed: 2019-03-12
Abstract: 一种高压软硬管路连接密封系统被公开。该系统包括软管（1）、硬管（5）、过渡接头（2），过渡接头（2）的两端分别与软管（1）及硬管（5）连接，在软管（1）及过渡接头（2）的外侧进行橡胶层（3）包胶，过渡接头（2）外包覆的橡胶层（3）上扣压有扣套（4）。该系统能够大大提升软硬管之间的密封性能，从而能够在高低温及高压气氛中使用，进而可以在新能源汽车的空调管路中使用。
Patent WO-2019184760-A1 (WO)
Inventor: YANG XIAODONG
IPC: H04W24/10
Filed: 2019-03-19
Abstract: 本公开实施例公开一种获取小区信息的方法和设备，该方法包括：在接收到测量配置信息时，根据目标信息，确定定时器的目标计时时长，所述测量配置信息用于指示终端设备获取目标小区的标识信息，所述目标信息包括以下信息中的至少一种：所述目标小区的频点相关信息、所述目标小区与服务小区的同步情况、终端设备的能力信息、以及终端设备的工作状态相关信息；在所述目标计时时长内获取到所述标识信息时，向网络设备上报所述标识信息。
Patent WO-2020113866-A1 (WO)
Inventor: CAO XIUMEI
IPC: H03K17/51
Filed: 2019-03-28
Abstract: A dual-mode power amplifier capable of switching operating power and a mode switching method. The power amplifier uses a multi-tap input transformer (T1) to realize the switching of a front stage load line and an output stage load line by controlling the turn-on/off of intermediate switches (S1-S4) connected with the taps (1-4), thereby achieving the optimal power conversion efficiency at different maximum output power. By using a transfer switch (S5, S6) to control the capacitance of a matching capacitor (C5), it is easier to adjust the load lines, and the performance of the power amplifier is further ensured. It is easily realized to integrate the intermediate switches (S1-S4) and the transfer switch (S5, S6) on an independent chip or the power amplifier by using the processes such as CMOS/phemt/bihemt/SeGe/SOI.
Patent WO-2019185031-A1 (WO)
Title: Optical module
Inventor: ZHENG LONG
IPC: H04B10/50
Filed: 2019-03-29
Abstract: The present application provides an optical module, comprising a connecting finger, a comparison unit, and a voltage division unit. The connecting finger comprises multiple pins. A first pin of the multiple pins can be multiplexed. The comparison unit comprises a first input end, a second input end, and a first output end. The first input end is connected to the first pin. The second input end is configured as a decision reference voltage. The first output end is configured as an output voltage. The voltage division unit comprises a third input end and a second output end. The third input end is configured to receive a voltage input. The second output end is connected to the first pin, and is configured to adjust a voltage at the first pin so that the first input end of the comparison unit obtains an input voltage. Output voltages having different levels are obtained according to the comparison result between the input voltage of the first input end of the comparison unit, and the decision reference voltage of the second input end thereof.
Patent WO-2019192420-A1 (WO)
Inventor: LU YUZHENG
IPC: B60L50/15
Filed: 2019-04-01
Abstract: 一种增程式燃料电池电动汽车动力装置及其控制方法，该装置包括：驱动电机（1）、双向变流器（2）、斩波器（3）、动力电池（4）、燃料电池（5）、高压储氢罐（6）、电控阀门（7）、控制器（8）、油门踏板（9）和制动踏板（10）；驱动电机（1）的输出通过变速齿轮箱与电动汽车的传动轴连接，驱动电机（1）的输入与双向变流器（2）的交流输出端连接，双向变流器（2）的直流输入端并联动力电池（4）的输出与斩波器（3）的输出，斩波器（3）的输入与燃料电池（5）的电源输出连接，燃料电池（5）的燃料进口通过电控阀门（7）与高压储氢罐（6）的输出连接，控制器（8）的输出分别与电控阀门（7）的控制端口和双向变流器（2）的控制端口连接，控制器（8）输入端分别连接油门踏板（9）和制动踏板（10）的输出信号。控制方法为BP神经网络控制。
Patent WO-2019228071-A1 (WO)
Title: Method, device and apparatus for adjusting exposure time of camera
Inventor: HAN XINXIN
IPC: H04N5/235
Filed: 2019-04-09
Abstract: Provided in the present invention are a method, device and apparatus for adjusting an exposure time of a camera. The method comprises: controlling a camera to capture imaged spots of an imaging assembly at a first exposure time; acquiring an energy value received by the camera when capturing the imaged spots; if the energy value is not in a set energy range, acquiring a curve parameter corresponding to an exposure time-energy curve according to the energy value and the first exposure time; calculating an estimated exposure time corresponding to an optimal energy value according to the curve parameter; and updating the first exposure time with the estimated exposure time corresponding to the optimal energy value. The technical solution provided in the present invention can adjust the exposure time of a camera to a reasonable value so as to improve the accuracy and reliability of spot analysis.
Patent WO-2020206607-A1 (WO)
Inventor: WU HAO
IPC: E04H6/40
Filed: 2019-04-09
Abstract: 本申请公开了一种停车转运机构及应用其的自动停车系统。停车转运机构包括：梳齿支撑组件、升降平台以及旋转支架，梳齿支撑组件设置有至少两排相平行设置的梳齿杆，每一排中的多根梳齿杆呈梳齿状排列以用于支撑车辆的车轮；升降平台设置在两排梳齿杆之间，升降平台进一步设置有行走轨道以用于承载车辆搬运器并作为车辆搬运器的运动轨道，升降平台用于对车辆搬运器进行抬升或者下降，以使得车辆搬运器的支撑杆与梳齿杆交错对接，进而使车辆在需要时由支撑杆与梳齿杆中的一个转移至另一个上；旋转支架用于带动梳齿支撑组件和升降平台旋转。本申请通过上述方案可以实现对停车转运机构上的车辆自动转移，以方便对车辆进行自动且平稳的运输。
Patent WO-2020215225-A1 (WO)
Inventor: HO MINGJAAN
IPC: H05K1/02
Filed: 2019-04-23
Abstract: Provided are a circuit board (100, 300) and a fabricating method therefor. The method comprises: (1) providing a substrate (10) and forming a through hole in the substrate (10); (2) filling a through hole (11) with a conductor (111) to form a conductive hole (12); (3) providing a peelable film (13) and covering same on the substrate (10); (4) forming a groove (15) by means of laser, wherein the groove (15) comprises a recess (151); (5) carrying out surface treatment on a wall of the groove (15); (6) removing the peelable film (13); (7) forming a seed layer (16); (8) fabricating a circuit layer (20) to obtain a circuit board unit (100), wherein the circuit layer (20) comprises a connecting pad (21), the connecting pad (21) being in the form of a conductive bump and electrically connected to the conductor (111) in a surrounding manner; (9) repeating steps (1) to (8) at least once; and (10) laminating the circuit board unit (100).
Patent WO-2019237876-A1 (WO)
Inventor: CHEN BIAO
IPC: H04M1/02
Filed: 2019-05-15
Abstract: 一种摄像头模组(10)和电子装置(100)。摄像头模组(10)包括至少两个摄像头(12)。至少两个摄像头(12)中的两个摄像头(12)并列设置。两个摄像头(12)的入射光轴(124)互相平行。每个摄像头(12)包括反射元件(121)、光学透镜组(122)和感光元件(123)。两个摄像头(12)的反射光轴(125)一致或互相平行。入射光经反射元件(121)反射后经过光学透镜组(122)在感光元件(123)上成像。
Patent WO-2020001198-A1 (WO)
Inventor: HU YINGRU
IPC: G02F1/1339
Filed: 2019-05-21
Abstract: A liquid crystal phase shifting unit, a manufacturing method therefor, a liquid crystal phase shifter, and an antenna, related to the technical field of phase shifting. Steady support is implemented for a liquid crystal filling area (6) via a support structure (4), thus increasing the stability of transmission for a microwave signal. An area between a first substrate (1) and a second substrate (2) of the liquid crystal phase shifting unit comprises the liquid crystal filling area (6). A microstrip line (3) is provided on the surface of the first substrate (1) facing the second substrate (2). The orthogonal projection of the microstrip line (3) on the first substrate (1) is located within the liquid crystal filling area (6). The support structure (4) is provided between the first substrate (1) and the second substrate (3), and is arranged in the liquid crystal filling area (6). The orthogonal projection of the support structure (4) on the first substrate (1) does not overlap with the microstrip line (3). The present invention is used for performing phase shifting on a microwave signal.
Patent WO-2019223784-A1 (WO)
Title: Apparatus and method for pdu session establishment restriction in emergency registration
Inventor: HUANG-FU CHIEN-CHUN
IPC: H04L29/08
Filed: 2019-05-24
Abstract: Aspects of the disclosure can provide an apparatus and method for performing protocol data unit (PDU) session establishment restriction in emergency registration in a fifth generation system (5GS). The apparatus comprises processing circuitry which is configured to detect whether user equipment (UE) is registered for emergency services via a first access type in the 5GS. When the UE is registered but without an established emergency PDU session, the processing circuitry is configured to establish a new emergency PDU session. When the UE is registered and has the established emergency PDU session, the processing circuitry is configured to transfer the established emergency PDU session in the first access type to a second emergency PDU session in a second access type by performing a PDU session establishment procedure or a service request procedure to transfer the established emergency PDU session. In some examples, the processing circuitry is configured to transfer the established emergency PDU session from a 3GPP access to a non-3GPP access or from a non-3GPP access to a 3GPP access. In some other examples, the processing circuitry is further configured to detect whether the UE has an established packet data network (PDN) connection for an emergency bearer service in a fourth generation (4G) system, perform an emergency PDU session establishment procedure with an existing emergency PDU session request type when the UE has the established PDN connection for the emergency bearer service, and transfer the established PDN connection for the emergency bearer service in the 4G system to an emergency PDU session in the 5GS.
Patent WO-2020082753-A1 (WO)
Inventor: CHOU GEORGE
IPC: G02B13/14
Filed: 2019-06-12
Abstract: 一种红外镜头(10)、相机模组(100)及电子装置(1000)。红外镜头(10)包括均具有正屈折力的第一透镜(L1)、第二透镜(L2)、第三透镜(L3)和第四透镜(L4)。红外镜头(10)满足以下条件式：abbe(vd)<35；其中，abbe(vd)为第一透镜(L1)至第四透镜(L4)中最大的阿贝数。
Patent WO-2020143199-A1 (WO)
Inventor: FU YU
IPC: H04L29/06
Filed: 2019-07-10
Abstract: 一种应用程序插件化方法、装置、系统和计算机可读存储介质，该方法包括：安装第一程序插件至主应用程序；通过所述第一程序插件从服务器获取待执行任务；若所述主应用程序中已安装有能够完成所述待执行任务的第二程序插件，利用所述第二程序插件完成所述待执行任务。用于实现在使用闲置资源或者目前市场上安卓产品过剩的性能时，可以不需要二次赋予权限，提高部署的灵活性。
Patent WO-2021003696-A1 (WO)
Inventor: LI GUORONG
IPC: H04B17/24
Filed: 2019-07-10
Abstract: 本申请实施例提供了一种边链路的无线链路监控方法，应用于终端设备，其中，所述方法包括：物理层向高层上报至少一条边链路的状态，以及所述状态对应的边链路信息，所述高层根据所述边链路信息进行无线链路监控或无线链路失败相关的操作。
Patent WO-2021012192-A1 (WO)
Inventor: JIANG FANGLIN
IPC: H02J7/00
Filed: 2019-07-23
Abstract: The present application discloses an electric separation circuit of a charge/discharge interface, comprising a charge interface ACL1, a charge interface ACN1, a discharge interface ACL2, a discharge interface ACN2, and a power supply interface, and further comprising a digital signal processor, a first relay K1, a second relay K2, and a switch control module, the first relay K1 and the second relay K2 both being single-pole double-throw relays. The digital signal processor is connected to an input end of the switch control module; an input end of the first relay K1 and an input end of the second relay K2 are both connected to an output end of the switch control module; a first contact pin of the first relay K1 is connected to the charge interface ACL1; a second contact pin of the first relay K1 is connected to the discharge interface ACL2; and a public connection end of the first relay K1 is connected to the power supply interface. Using the foregoing means, the following are achieved: the discharge interface is not turned on during charging and the charge interface is not turned on during discharging, thereby ensuring the separation and independence of charge and discharge, and improving the safety of charge and discharge.
Patent WO-2020029956-A1 (WO)
Inventor: GAO BO
IPC: H04W72/04
Filed: 2019-08-06
Abstract: 本文公开了一种传输控制方法、探测参考信号传输方法、终端、基站及计算机可读存储介质，所述传输控制方法包括：接收网络侧发送的配置信息，所述配置信息包括分组索引与第一信息的关联关系，其中，所述第一信息与信道或参考信号存在关联关系；根据所述分组索引和所述配置信息，确定所述第一信息关联的信道或参考信号的接收方式或发送方式。
Patent WO-2021026705-A1 (WO)
Inventor: YUAN WEIPING
IPC: H04N5/232
Filed: 2019-08-09
Abstract: A matching relationship determination method, a re-projection error calculation method and a related apparatus, wherein same relate to the field of artificial intelligence, and specifically to the field of automatic driving. The matching relationship determination method comprises: acquiring N groups of feature point pairs (301), wherein each group of feature point pairs comprises two matching feature points, one feature point is a feature point extracted from a first image, and the other feature point is a feature point extracted from a second image; using motion state information of a dynamic obstacle to adjust pixel coordinates of a target feature point from among the N groups of feature point pairs (302), wherein the target feature point is a feature point corresponding to the dynamic obstacle in the first image and/or the second image; and determining a target matching relationship between the first image and the second image according to the adjusted pixel coordinates corresponding to each feature point from among the N groups of feature point pairs (303). A matching relationship between two frames of images can be accurately determined in an automatic driving scenario with a dynamic obstacle.
Patent WO-2020052407-A1 (WO)
Title: Terminal device antenna
Inventor: WANG YIJIN
IPC: H01Q1/36
Filed: 2019-08-20
Abstract: The present disclosure provides a terminal device antenna. The terminal device antenna comprises a metal frame, at least two slot units are provided on one side of the metal frame, each slot unit comprises a first slot ring and a second slot ring which are independent from each other, the first slot ring and the second slot ring are communicated by means of a third slot, and the perimeter of the outside edge of the first slot ring is different from the perimeter of the outside edge of the second slot ring; the metal frame on both sides of the third slot is separately provided with an antenna feed point and a ground point; the metal frame is electrically connected to a ground plate in a terminal device.
Patent WO-2020125052-A1 (WO)
Inventor: ZHAO ZHENYU
IPC: F25C1/24
Filed: 2019-08-26
Abstract: 提供一种制冰机（1）及具有其的冰箱。制冰机（1）包括，框架（100），制冰盘（200）及分别设于制冰盘（200）的两个侧壁上方的防溅水挡板（300）及与制冰盘（200）连接的传动装置（400）；制冰盘（200）在制冰位置和脱冰位置之间可转动地设于框架（100）内；每个防溅水挡板（300）均为倾斜设置并朝向制冰盘（200）延伸，防溅水挡板（300）通过设于防溅水挡板（300）一侧的挡板转轴（310）转动连接于框架（100）；传动装置（400）用于在制冰盘（200）由制冰位置向脱冰位置转动时，带动两个防溅水挡板（300）分别绕各自的挡板转轴（310）向远离制冰盘（200）的方向转动。
Patent WO-2020125069-A1 (WO)
Title: Handover control method and device
Inventor: FAN JIANGSHENG
IPC: H04W36/08
Filed: 2019-09-05
Abstract: The present disclosure relates to the field of wireless communication technology, and in particular, to a handover control method and device. The existing handover mechanism may cause the problem that too frequent handover measurement of a terminal increases the energy consumption of the terminal, negatively impacting the power saving of the terminal. A source satellite base station of the embodiments of the present disclosure receives auxiliary information reported by a terminal, determines at least one candidate satellite base station according to satellite base station orbital map information of the current region and the auxiliary information, and returns a handover command to the terminal according to the at least one candidate satellite base station, so that the terminal determines, according to the handover command, a target satellite base station to which the terminal is to be handed over, and is handed over from the source satellite base station to the target satellite base station. As the embodiments of the present disclosure provide a handover procedure for source satellite base station decision triggering, a terminal does not need to frequently measure the current serving base station and an adjacent base station, thereby simplifying the handover procedure and reducing the energy consumption of the terminal.
Patent WO-2020181747-A1 (WO)
Inventor: ZHANG BINGZHONG
IPC: C09J9/02
Filed: 2019-09-06
Abstract: 本申请涉及一种异向性导电胶结构及其生产方法。一种异向性导电胶结构，包括若干个均布的导电丝，及用于固定若干个导电丝的粘结层；所述导电丝两端贯穿粘结层，且导电丝两端用于导通。本导电胶通过导电丝来代替现有技术的导电珠子，在结构上更加简单，可塑性更强，而且在使用上使得分辨率更加高；生产工序简单，生产效率高，成本低。
Patent WO-2020063528-A1 (WO)
Inventor: SUN YINGKONG
IPC: H04L12/46
Filed: 2019-09-23
Abstract: Disclosed are a method, apparatus and system for communication between virtual machines in a data center. In the present application, an IPsec security protocol is used to encapsulate data packages, and security measures such as encryption or authentication are taken for communication packets between virtual machines in the same tenant or the same VxLAN, thereby ensuring the security of the communication packets. Moreover, in order to prevent the problem of encapsulated IPsec packets being unable to be routed or associated with a correct security association, indexes of the IPsec packets and an IPsec security association are extended.
Patent WO-2021012393-A1 (WO)
Inventor: WANG YI
IPC: C09K11/78
Filed: 2019-09-30
Abstract: The present invention relates to a red phosphor powder and a preparation method and application thereof, belonging to the technical field of phosphors used for light-emitting diodes (LEDs) in the field of lighting and display. The present invention uses a compound containing molybdenum ions as a matrix, doped with rare earth element europium ions, yttrium ions, and alkali metal ions to prepare a red phosphor, having the chemical formula M n Y 1-x Eu x (MoO4)2 (M is alkaline metal; n = 0.10–1.5; x = 0.1–0.5). The red phosphor prepared by the present invention can be simultaneously excited by ultraviolet light, blue light, and green light to effectively excite red light having a higher luminous intensity; the preparation process of the molybdate red phosphor provided by the invention is simple, and the process is easy to operate and suitable for use in industrial production.
Patent WO-2020103600-A1 (WO)
Inventor: XU LINGYUN
IPC: G02B7/00
Filed: 2019-10-10
Abstract: 一种镜头模组，包括镜头筒（1）、镜片组以及定位块（5），镜头筒（1）包括第一筒壁（12）及第二筒壁（11），镜片组包括至少一个第一镜片（2），第一镜片（2）包括主体部（21）和周边部（22），周边部（22）与第一筒壁（12）相对设置，周边部（22）包括相对设置的物侧面（221）与像侧面（222）、以及连接物侧面（221）与像侧面（222）的连接面（223），第一筒壁（12）靠近第一镜片（2）的一侧向远离周边部（22）方向凹陷形成有第一凹槽（121），物侧面（221）朝像侧面（222）凹陷形成第二凹槽（224），第一凹槽（121）在第二凹槽（224）的正投影与第二凹槽（224）重合，且第一凹槽（121）与第二凹槽（224）共同围成收容空间（10）；定位块（5）卡设于收容空间（10）内并使得第一筒壁（12）与周边部（22）滚动连接。与相关技术相比，这种镜头模组结构简单、调节方便且可靠性好。
Patent WO-2020083141-A1 (WO)
Inventor: TANG WANFU
IPC: F01N3/01
Filed: 2019-10-21
Abstract: A system (101) for removing dust from an intake airflow of an engine, comprising an intake airflow dust-removing system inlet (1011), an intake airflow dust-removing system outlet and an intake airflow electric field apparatus (1014). The system for removing dust from an intake airflow can effectively remove particulates in the airflow entering an engine such that the the air entering the engine can be cleaner.
Patent WO-2020206983-A1 (WO)
Inventor: CHEN SONGJIAO
IPC: G06K9/00
Filed: 2019-10-24
Abstract: Provided by the present application are an optical fingerprint device and an electronic device. The optical fingerprint device is applied to an electronic device with a display screen, and is configured to be arranged below the display screen. The optical fingerprint device comprises an optical fingerprint chip, a filter layer, a light absorption layer and an optical component. The filter layer is sputtered or vapor-deposited on the upper surface of the optical fingerprint chip, and the light absorption layer is coated on the upper surface of the filter layer; alternatively, the light absorption layer is coated on the upper surface of the optical fingerprint chip, and the filter layer is sputtered or vapor-deposited on the upper surface of the light absorption layer. The optical fingerprint chip comprises a sensing array with a plurality of optical sensing units, the sensing array being used for receiving a fingerprint light signal returned from a finger on the display screen and transmitted through the filter layer and the light absorption layer, and the fingerprint light signal being used for obtaining a fingerprint image of the finger.
Patent WO-2020083394-A1 (WO)
Inventor: ZHEN CHANGGUA
IPC: H01L51/56
Filed: 2019-10-25
Abstract: Disclosed are an electroluminescent device, a preparation method therefor, and a nanocrystalline ink. The electroluminescent device comprises an electroluminescent element and at least one nanocrystalline encapsulation layer provided outside the electroluminescent element. The nanocrystalline encapsulation layer comprises a metal oxide nanocrystalline, the surface of which has ligands, and there is a hydrogen bonding between the ligands; the electroluminescent element comprises an electrode; and the electroluminescent device also comprises at least one protective layer provided between the electrode and the nanocrystalline encapsulation layer. The metal oxide nanocrystalline improves the bendability of the nanocrystalline encapsulation layer, and reduces the production of defects in a film layer. The metal oxide nanocrystalline can be formed into a film by means of coating, thereby avoiding defects in a film layer caused by the raw materials and cavity cleanliness; and the apparatus has a low cost, and can thus be used in large size projects.