baber/WOPTO huggingface dataset:
Patent WO-2019237656-A1 (WO)
Title: Special fertilizer for medicinal plant growth and preparation method therefor
Inventor: ZHOU HOUCHENG
IPC: C05G3/60
Filed: 2018-11-19
Abstract: A special fertilizer for medicinal plant growth and a preparation method therefor. The special fertilizer comprises the following raw materials in part by weight: 35-45 parts of fresh earthworm dung, 20-35 parts of dry earthworm dung, 5-10 parts of attapulgite powder, 20-30 parts of fly maggot dung, 3-8 parts of loofah sponge, 5-10 parts of alcoholic wastewater, 10-18 parts of bagasse, 1-3 parts of grape seeds, 15-25 parts of tobacco waste dry power, 2-5 parts of egg shells, 10-20 parts of municipal sludge, 15-25 parts of pleurotus eryngii waste material, 5-12 parts of wood vinegar, 2-5 parts of folium artemisiae argyi, 3-6 parts of complex microbial agent, and 3-6 parts of biomass charcoal. The special fertilizer is used for the growth of medicinal plants, especially the growth of ligusticum wallichii and coptis chinensis, the yield and quality can be effectively increased, and the incidence rate of harmful bacteria is reduced.
Patent WO-2020107251-A1 (WO)
Title: System and method for detecting in-vehicle headcount
Inventor: SHEN HAIFENG
IPC: G07C9/00
Filed: 2018-11-28
Abstract: A system for determining a headcount of occupants in a vehicle (100), the system includes at least one camera (110), which is configured to capture at least one image in the vehicle. The system further includes a controller (120) in communication with the camera (110). The controller (120) is configured to detect a plurality of human objects (410) from the image, detect one or more vehicle occupants in each human object (410), and determine the headcount based on the detected vehicle occupants.
Patent WO-2020019619-A1 (WO)
Inventor: BI CHENG
IPC: H04L5/00
Filed: 2018-12-03
Abstract: 本文公开提供了一种定位参考信号生成方法，包括：为定位参考信号分配包括至少两个连续的符号的时频资源；根据定位参考信号的生成信息以及时频资源，按照预设生成方式将至少两个连续的符号作为一个组合PRS符号，生成在时域上连续的定位参考信号。本文还公开了一种定位参考信号生成装置、基站以及存储介质。
Patent WO-2020042422-A1 (WO)
Title: 底壳组件及具有其的空调器
Inventor: YANG PAN
IPC: F24F13/30
Filed: 2018-12-07
Abstract: 公开了一种底壳组件及具有其的空调器。底壳组件包括电器盒（10）；底座（20），底座（20）具有安装端，电器盒（10）可拆卸地安装于安装端上，安装端和电器盒（10）之间形成有走管结构，走管结构用于将气液管（30）引出至底座（20）外。
Patent WO-2019128731-A1 (WO)
Title: Systèmes et procédés pour la correction de diffusion d'une image
Inventor: YAO PENG
IPC: A61B6/00
Filed: 2018-12-14
Abstract: La présente invention concerne un procédé pour la correction de diffusion d'une image. Le procédé peut consister à obtenir une image d'un sujet et une image de référence d'air. Le procédé peut également comprendre l'identification d'un OI (objet d'intérêt) à partir de l'image, l'OI comprenant un ou plusieurs pixels. Pour chaque pixel dudit un ou desdits plusieurs pixels de l'OI, le procédé peut également consister à déterminer une épaisseur équivalente de l'OI correspondant à chaque pixel sur la base d'une valeur de pixel de chaque pixel et de l'image de référence et à déterminer un coefficient de correction de diffusion de chaque pixel sur la base, au moins en partie, de l'épaisseur équivalente de l'OI correspondant à chaque pixel. Le procédé peut en outre consister à corriger la valeur de pixel de chaque pixel à l'aide du coefficient de correction de diffusion correspondant pour chaque pixel dudit un ou desdits plusieurs pixels de l'OI.
Patent WO-2020133293-A1 (WO)
Inventor: WU LEI
IPC: G01M11/02
Filed: 2018-12-28
Abstract: 测试工装（100）包括底板（10）、至少一浮动板组件（20）及与浮动板组件（20）对应的驱动组件（30），每一驱动组件（30）安装于底板（10）一侧，每一浮动板组件（20）可滑动的安装于底板（10）上，每一驱动组件（30）连接于浮动板组件（20），底板（10）上设有多组第一绕线组件（11），每一浮动板组件（20）包括若干第二绕线柱（25），每一组第一绕线组件（11）与对应的第二绕线柱（25）配合，用于弯曲待测光纤，使待测光纤绕圈时受力均匀，提升测试数据的准确性。测试系统（200）根据预设程序即可自动完成宏弯损耗数据的采集与分析，具有自动化程度高的优点。测试系统（200）的使用方法只需人工一次将光纤接入测试系统（200），减少了人为因素对测试数据的干扰，具有测量结果准确的优点。
Patent WO-2020133448-A1 (WO)
Inventor: HANG JIANWEI
IPC: G06K9/00
Filed: 2018-12-29
Abstract: 一种三维轨迹数据的拟合处理方法及光学动作捕捉方法，其中拟合处理方法包括输入步骤、判断步骤、调整步骤、处理步骤、输出步骤等环节，光学动作捕捉方法包括获取三维轨迹数据及拟合处理等环节。由于通过标准高斯分布概率密度函数对应的核函数值来判断每个三维数据为正常值还是为异常值，使得核函数值与预设阈值能够进行有效的比较，能够增加判断的精确度；此外，调整步骤中通过将三维轨迹数据中若干个正常值对应的三维数据调整为异常值，可通过扩大排查范围的方式对异常值进行筛选，进一步地找出未检测出来的异常值，从而最大限度地排除为异常值的三维数据的干扰，保证测量对象的三维轨迹数据的测量精确度。
Patent WO-2019137323-A1 (WO)
Inventor: DONG YUANYUAN
IPC: G06F3/06
Filed: 2019-01-07
Abstract: 本申请公开了一种数据存储方法、装置及系统；上述数据存储方法，包括：对数据块进行纠删码编码，得到对应的多个数据分片；将多个数据分片分别写入对应分配的存储节点；若第一设定时长内成功写入数据分片的存储节点的个数大于或等于设定值，则确定该数据块写入成功；其中，设定值大于或等于数据分片中的数据块分片的个数且小于或等于数据分片的个数。如此，能够降低数据写入延迟，并提高存储节点存在故障时的性能稳定性。
Patent WO-2020142944-A1 (WO)
Inventor: LI TAO
IPC: H02P5/00
Filed: 2019-01-09
Abstract: 一种电机（602，8022）控制方法、激光雷达（600，702，802，9022）和可移动设备（800，900），包括：通过确定多个电机（602，8022）的启动时刻，多个电机的启动时刻部分不相同或者全部不相同(S201)；控制各个电机（602，8022）在各自相应的启动时刻启动(S202)。降低了激光雷达（600，702，802，9022）启动时，同时启动的电机（602，8022）的数量，从而降低了总的启动电流，进而避免了因总的启动电流过大而导致激光雷达（600，702，802，9022）出现异常，提高了激光雷达（600，702，802，9022）的稳定性。
Patent WO-2019141139-A1 (WO)
Title: Echoprint user authentication
Inventor: LI CHANGZHU
IPC: G06F21/32
Filed: 2019-01-14
Abstract: A device and method providing audio-based, continuous authentication of a user to provide access to a processing device. A user echoprint model is created while a user interacts with an authentication interface for another authentication method of the device, transparently to the user. The sound waves are user-specific and inaudible. The user-specific sounds are reflected by the user and used to construct an echoprint which can be compared by a previously constructed user-specific, echoprint model. If the result is positive, access to the processing device may be allowed. Access to the processing device is based on the audio authentication or the alternative authentication is based on the result of audio authentication and updates a device state indicating whether the display is on or off and whether the device is locked or unlocked.
Patent WO-2020146996-A1 (WO)
Inventor: ZHAO JIANPING
IPC: H01H73/04
Filed: 2019-01-15
Abstract: 一种双断点断路器的动触头机构，包括沿前后方向水平放置的前静触头（10）、后接触组件和动触头（20），前静触头（10）的后端设有第一触点（11），后接触组件设置在前静触头（10）的后方，后接触组件包括连接板（60），连接板（60）的前端设有后静触头（80），后静触头（80）的前端设有插槽（81）；动触头（20）设置在前静触头（10）的后方，动触头（20）的中部通过连杆机构（50）与杠杆机构（40）连接，动触头（20）具有一个前接触端和一个后插入端，动触头（20）的前接触端设有与第一触点（11）配合的第二触点（21），动触头（20）的后插入端插入或脱离插槽（81）；第一触点（11）与第二触点（21）分开或闭合的行程大于动触头（20）的后插入端脱离或插入插槽（81）的行程。所述双断点断路器的动触头机构，不但具有分断能力强的优点，还具有生产成本低，使用寿命长的优点。
Patent WO-2020150893-A1 (WO)
Inventor: CHEN PENG
IPC: H01L23/367
Filed: 2019-01-22
Abstract: An integrated circuit (IC) packaging structure includes a packaging substrate, one or a plurality of dies, an encapsulation material, at least one trench, and a heat dissipation structure. The one or the plurality of the dies is disposed on the packaging substrate. The encapsulation material is disposed on the packaging substrate and is configured to encapsulate the one or the plurality of the dies on the packaging substrate. The at least one trench is disposed in the encapsulation material. At least a part of the heat dissipation structure is disposed in the at least one trench. The cooling capability of the IC packaging structure may be improved by the heat dissipation structure without increasing the size of the IC packaging structure significantly.
Patent WO-2020057041-A1 (WO)
Inventor: LI CHENG
IPC: H01Q15/00
Filed: 2019-01-30
Abstract: The present invention relates to a metamaterial structure and a metamaterial microwave resonator manufactured by using same. The metamaterial structure comprises: a dielectric layer; a first metal coating, wherein the first metal coating covers the dielectric layer, and comprises a first arc-shaped metal coating and a first strip-shaped metal coating, and the first strip-shaped metal coating intersects with the first arc-shaped metal coating; and a second metal coating, wherein the second metal coating and the first metal coating have the same structure and are symmetrically arranged, the second metal coating covers the dielectric layer, and comprises a second arc-shaped metal coating and a second strip-shaped metal coating, the second strip-shaped metal coating intersects with the second arc-shaped metal coating, the opening of the second arc-shaped metal coating is opposite to that of the first arc-shaped metal coating, the end parts of the openings are arranged at an interval, the second strip-shaped metal coating and the first strip-shaped metal coating have the same extension direction, and the end parts are arranged at an interval. The microwave resonator manufactured by using the metamaterial structure has a high Q value, and has less difficulty in a manufacturing process.
Patent WO-2020155113-A1 (WO)
Inventor: LI ZHIXUE
IPC: H01F1/057
Filed: 2019-02-01
Abstract: L'invention porte sur un procédé de préparation d'un aimant aux terres rares à diffusion et sur l'aimant aux terres rares à diffusion. Le procédé de préparation de l'aimant aux terres rares à diffusion comprend les étapes consistant à : effectuer une pulvérisation sur un substrat en utilisant un premier matériau cible pour former un premier revêtement sur la surface du substrat, le premier matériau cible étant composé de RHx-RLy-Mz en pourcentage en poids, RH étant un ou plusieurs éléments parmi Dy, Tb et Ho, RH contenant au moins un élément parmi Dy et Tb, RL étant un ou plusieurs éléments parmi Nd, Pr, Ce, La et Y, RL contenant au moins un élément parmi Nd et Pr, M étant au moins un élément parmi Co, Cu, Ga, Ag, Sn et Al, y représentant de 22 à 28 % en poids, z représentant de 0 à 20 % en poids, x représentant (100 - y - z) % en poids, et le substrat étant un aimant aux terres rares ; et effectuer un traitement de diffusion sur le substrat après pulvérisation afin d'obtenir un aimant aux terres rares à diffusion. La résistance à la corrosion de l'aimant aux terres rares à diffusion préparé au moyen de la présente invention est évidemment améliorée.
Patent WO-2019154333-A1 (WO)
Title: Resource selection method and terminal device
Inventor: CAI YU
IPC: H04L5/00
Filed: 2019-02-01
Abstract: The present application provides a resource selection method and a terminal device. The method comprises: a first terminal device determines a first resource, wherein the first resource comprises one or more of a resource used by a second terminal device for transmitting data, a resource reserved by the second terminal device for transmitting data, a resource determined according to the resource used by the second terminal device for transmitting data, and a resource determined according to the resource reserved by the second terminal device for transmitting data; if the first resource overlaps a second resource, the first terminal device does not use the second resource, or the first terminal device reselects a resource, wherein the second resource comprises one or more of a resource selected by the first terminal device for transmitting data, a resource used as a candidate by the first terminal device for transmitting data, a resource determined according to the resource selected by the first terminal device for transmitting data, and a resource determined according to the resource used as a candidate by the first terminal device for transmitting data. The problem of resource collision occurring between terminal devices due to that the resources in a resource pool are shared resources is solved.
Patent WO-2020164024-A1 (WO)
Inventor: WU CHUNLI
IPC: H04W36/00
Filed: 2019-02-13
Abstract: Des modes de réalisation de la présente invention concernent un dispositif, un procédé, un appareil, et un support de stockage lisible par ordinateur, pour l'exécution d'une commutation de largeur de bande (BWP). Un procédé décrit dans des modes de réalisation représentatifs de l'invention consiste à : déterminer, au niveau d'un dispositif terminal, si des procédures d'écoute avant de parler (LBT) échouent de façon continue sur une première partie de largeur de bande (BWP) sur laquelle fonctionne le dispositif terminal ; en cas d'échecs continus des procédures LBT sur la première BWP, exécuter une commutation à une seconde BWP différente de la première BWP. Au lieu de déclencher une procédure de rétablissement lorsque des échecs continus des procédures LBT sont détectés, il peut être beaucoup plus efficace d'exécuter la commutation à une autre BWP sur différents sous-canaux LBT que de réaliser l'ensemble des procédures de rétablissement et de reconfiguration.
Patent WO-2019184981-A1 (WO)
Title: Water-soluble, environmentally-friendly, self-adhesive insulating coating for silicon steel
Inventor: LI DENGFENG
IPC: C09D163/00
Filed: 2019-03-28
Abstract: Disclosed is a water-soluble, environmentally-friendly, self-adhesive insulating coating for silicon steel, comprising a thermosetting water-based film-forming resin, a thermoplastic water-based film-forming resin, inorganic nanoparticles, an auxiliary agent, a solvent and pure water. Based on the total weight of the coating, the solid weight of the thermosetting water-based film-forming resin is 0.1 to 50%, the solid weight of the thermoplastic water-based film-forming resin is 0.1 to 10%, and the weight of the auxiliary agent and the solvent is 5 to 25%. The coating can produce a thin, sticky, insulated, no edge-spill, and self-adhesive coating product. During post-curing formation of a laminated iron core, excessive pressure and temperature are not required, thereby shortening the curing time and increasing the iron core processing efficiency.
Patent WO-2019205883-A1 (WO)
Inventor: CHANG MING
IPC: H01Q1/12
Filed: 2019-03-28
Abstract: 本发明实施例公开了一种封装天线及其制备方法、和移动通信终端。封装天线包括第一基板和第二基板，第一基板与第二基板相抵接并通过粘接材料连接；第一基板的空腔的腔壁上设置有溢胶孔，溢胶孔贯穿第一基板；第二基板的焊接面与空腔面的连接处设置有阻焊结构；粘接材料设置于焊接面上，粘接材料与第一基板的第二板面相连并延伸至溢胶孔中。利用溢胶孔吸收多余的粘接材料，避免粘接材料对第一基板与第二基板之间的抵接及距离造成影响；阻焊结构阻止粘接材料向空腔流动，以保证天线的可靠性。利用溢胶孔结合阻焊结构，有效解决了多余粘接材料污染天线区和粘接材料厚度控制困难的工艺问题，粘接材料形成铆钉结构，使第一基板与第二基板连接牢固可靠。
Patent WO-2020199146-A1 (WO)
Inventor: CAO YUHUI
IPC: G06Q30/02
Filed: 2019-04-03
Abstract: 一种车身广告发布与抢单的网络平台，是链接广告主、车主、图文店的信息传递工具，是一种广告效果好、成本低的新形式的广告宣传方式。整合了广告主、社会车辆、图文店等各方资源，激活了各国数以万计的乘用车资源，将车辆变身为广告展示板，帮助广大企业以极低成本进行高效的线下广告展示，实现了闲置资源的激活。广告主可以不受时间、空间和人为的限制随时随地做出投放广告的决策，自主决定广告的投放区域、投放时间和投放的价格。车主和图文店可以随时浏览平台信息并进行抢单。在帮助广告主大幅节省广告费用的同时，帮助广大车主和图文店增加收入，实现了企业、车主、图文店的多方合作共赢。
Patent WO-2020206621-A1 (WO)
Inventor: DU PENG
IPC: H01L31/18
Filed: 2019-04-09
Abstract: An infrared detector for high quantum efficiency and a long carrier lifetime comprises a superlattice absorber with multiple InGaAsSb layer. In  x Ga  1-x As  y Sb  1-y  with different Indium content X and/or As content Y has different band gap and/or lattice constant. These multiple InGaAsSb layers together with an InAs, InGaAs, InAsSb or another InGaAsSb layer form a period of a superlattice. A certain combination of monolayers of In  x Ga  1-x As  y Sb  1-y  with different indium and/or arsenic content together with the InAs, InGaAs, InAsSb or another InGaAsSb layer provide the superlattice with different bandgap of the miniband, but the whole structure may still lattice match to the GaSb or InAs substrate. Repeating growth of the InGaAsSb layers and the InAs, InGaAs, InAsSb or another InGaAsSb layer forms a superlattice absorber for an infrared detector. The absorber with n-type doping or p-type doping is combined with other functional layers such as a barrier layer or other type doping layer and contact layers to make an infrared detector device.With a certain combination of X and Y, it keeps the same lattice constant, but the bandgap may change. Content grading changes content of every monolayer or every a few monolayers of InGaAsSb.
Patent WO-2020237537-A1 (WO)
Inventor: GOU TIANCHANG
IPC: A61N5/00
Filed: 2019-05-29
Abstract: The present invention provides an image guidance method and apparatus, and a medical device and a computer readable storage medium. The medical device comprises a patient fixing mechanism and an image mechanism, and the image mechanism is configured to be able to perform medical image photographing on a patient located on the patient fixing mechanism at several photographing angles by rotating around the patient fixing mechanism. The image guidance method comprises: controlling the image mechanism to rotate around the patient fixing mechanism; when the image mechanism is rotated to any photographing angle, obtaining a first image, the first image being a medical image of the patient captured by the image mechanism at a first photographing angle, and the first photographing angle being a photographing angle to which the image mechanism is currently rotated; when a second image corresponding to the first image is obtained, performing image guidance on the basis of using a combination of the first image and the second image to indicate the current position state of the patient. The present invention can help reduce a time interval between two adjacent detections of the current position state of a patient.
Patent WO-2020119046-A1 (WO)
Inventor: ZHANG LEI
IPC: F24F1/0022
Filed: 2019-06-12
Abstract: 一种立式空调室内机，包括：机壳（110），其内部限定出用于放置换热部（120）以及出风风机（130）的空腔；出风风机（130）为一个沿机壳（110）高度方向布置的贯流风机，用于将进入机壳（110）内的空气引导至换热部（120），并排出至机壳（110）外部；至少一个引风风机（140），安装在机壳（110）内部，用于将机壳（110）外部的空气供向出风风机（130），以提高出风风机（130）的风力。通过引风风机（140）将机壳（110）外部的空气快速吸入至机壳（110）内部并且引向出风风机（130），有效地提高了出风风机（130）的风量，使得可以满足用户对大风量快速调温的需求。同时，引风风机（140）对吸入空气具有加速的效果，进而提高了空气与换热部（120）的换热效率。
Patent WO-2020237748-A1 (WO)
Inventor: ZHOU QIANG
IPC: C07C225/20
Filed: 2019-06-18
Abstract: La présente invention concerne un procédé de préparation d'un composé ayant un effet thérapeutique à action prolongée. Le composé peut être utilisé pour préparer des médicaments antidépresseurs, anesthésiques et analgésiques, ainsi que des médicaments pour l'amélioration de la fonction cognitive, la protection pulmonaire, la sclérose latérale amyotrophique ou le syndrome de douleur régionale complexe.
Patent WO-2019242718-A1 (WO)
Title: 一种车辆变道控制方法和装置
Inventor: LU NING
IPC: G05B11/42
Filed: 2019-06-21
Abstract: 一种车辆变道控制方法，包括：接收变道指令（步骤101）；获取车辆的速度参数（步骤102）；根据速度参数确定预设控制器的控制系数（步骤103）；获取车辆的位置偏差参数和航向角参数；当位置偏差参数大于或等于第一阈值，或，航向角参数大于或等于第二阈值时，根据控制系数、位置偏差参数和航向角参数，确定车辆的目标方向盘转向角；根据目标方向盘转向角，控制车辆进行变道操作；直到位置偏差参数低于第一阈值，且航向角参数低于第二阈值（步骤104）。其中速度参数、位置偏差参数和航向角通过速度传感器、车载摄像头就可以获取，而不需要依赖高精度的定位系统，能大大减少车辆变道所需的成本和对控制器资源的占用。
Patent WO-2020258176-A1 (WO)
Inventor: ZHAN ZHAN
IPC: G01C19/5684
Filed: 2019-06-27
Abstract: Provided are a differential resonator (1) and an MEMS sensor, wherein, the differential resonator (1) comprises a substrate (10), a first resonator (11), a second resonator (12) and a coupling mechanism (13), wherein the first resonator (11) is connected with the second resonator (12) through the coupling mechanism (13), and the first resonator (11) and the second resonator (12) are connected with the substrate (10) and can displace relative to the substrate (10) under the action of an external force, the coupling mechanism (13) comprises a first guide beam (131), a second guide beam (132), a first coupling beam (133), a second coupling beam (134), a first connecting part (135) and a second connecting part (136); wherein, the first guide beam (131) and the second guide beam (132) are arranged on opposite sides of the direction perpendicular to the vibration direction of the first resonator (11) or the second resonator (12); one end of the first coupling beam (133) is connected with the first guide beam (131), the other end is connected with the second guide beam (132), and the first coupling beam (133) is connected with the first resonator (11) through the first connecting part (135); one end of the second coupling beam (134) is connected with the first guide beam (131), the other end is connected with the second guide beam (132), and the second coupling beam (134) is connected with the second resonator (12) through the second connecting part (136).
Patent WO-2020019930-A1 (WO)
Title: Automatic parking method and device
Inventor: ZHANG XUEFEI
IPC: B60W30/06
Filed: 2019-06-28
Abstract: An automatic parking method and device, comprising: receiving a parking instruction; performing perspective transformation on peripheral images collected by an acquisition camera; inputting the transformed images into an idle parking space feature model; identifying areas in the images that comply with an idle parking space feature, and determining an inclination angle and location information in the images of each area; further determining the location of each idle parking space relative to a vehicle; receiving a selection instruction for a target parking space; planning a parking route for the vehicle according to the inclination angle and the location of the target parking space relative to the vehicle; and parking according to the parking route.
Patent WO-2020007310-A1 (WO)
Title: Wireless charging transmitting circuit, wireless charging receiving circuit, and method
Inventor: ZHANG WENCHENG
IPC: H02J7/02
Filed: 2019-07-03
Abstract: A wireless charging transmitting circuit, a wireless charging receiving circuit, and a method. The wireless charging transmitting circuit comprises: a power supply input interface (11); a voltage stabilizing circuit (12), one end thereof being connected to the power supply input interface (11), and the other end being connected to a first input end of a first inverter circuit (131) and a first input end of a second inverter circuit (132), respectively; a first transmitting coil (141) connected to an output end of the first inverter circuit (131); a second transmitting coil (142) connected to an output end of the second inverter circuit (132); and a charging control circuit (15) for controlling, when there are receiving coils within the charging ranges of both the first transmitting coil (141) and the second transmitting coil (142), the first transmitting coil (141) and the second transmitting coil (142) to simultaneously perform charging or controlling the first transmitting coil (141) and the second transmitting coil (142) to perform charging alternatively.
Patent WO-2020011117-A1 (WO)
Title: Ultraviolet light emitting diode chip for improving light extraction efficiency, and manufacturing method therefor
Inventor: WU LIANGWEN
IPC: H01L33/32
Filed: 2019-07-08
Abstract: The present invention provides an ultraviolet light emitting diode chip for improving light extraction efficiency, and a manufacturing method therefor. The ultraviolet light emitting diode chip comprises an n-type semiconductor layer, a pyramidal pit preparation layer, an active layer, a p-type semiconductor layer, a p-type electrode, a reflecting layer, a bonding layer, an n-type electrode, and a substrate; the pyramidal pit preparation layer is located above the n-type semiconductor layer; the active layer is located above the pyramidal pit preparation layer; the p-type semiconductor layer is located above the active layer; an n-type electrode layer is formed on the n-type semiconductor layer. The present invention has the advantages that: by forming a pyramidal pit having a hexagonal multi-surface structure in the active layer, the light exit direction of TM mode polarized light in the active layer is changed, so that the TM mode polarized light does not need to be propagated by means of a long path near the active layer; the size and density of an opening of the pyramidal pit in the active layer are simultaneously adjusted so as to make the projection area of a flat region of the pyramidal pit connected with the active layer be controlled within 30% of the total projection area of an active region, and thus, the light extraction efficiency of an ultraviolet light emitting diode is improved.