baber/WOPTO huggingface dataset:
Patent WO-2020211405-A1 (WO)
Inventor: ZHOU JUNJIE
IPC: G06Q10/08
Filed: 2019-12-09
Abstract: An interaction method between a mobile robot (100) and a smart device (200), comprising: at least one smart device (200) provided with independent encoding and having a voice playback function, wherein the smart device is configured in a designated region and is connected to a remote server (10) respectively. The smart device (200) plays back prompt information on the basis of a received instruction; the mobile robot (100) generates a second instruction by means of estimation on the basis of a received first instruction and feeds same back to the remote server (10); the remote server (10) transmits a third instruction in response to the second instruction to the smart device (200) of a target region; and the smart device (200) receives and responds to the third instruction and plays back prompt information. The robot (100) applying the described method generates a second instruction in response to the received first instruction on the basis of the first instruction, and the smart device (200) plays back prompt information when the second instruction is satisfied. Compared to existing methods, the described interaction method may prompt a user more conveniently.
Patent WO-2021103198-A1 (WO)
Title: 拨杆、出风框组件及空调器
Inventor: RAO WEI
IPC: F24F13/15
Filed: 2019-12-16
Abstract: 一种拨杆(1)、出风框组件(100)及空调器，拨杆(1)包括：连动部(11)，连动部(11)的一端设有第一限位凸起(112)；拨动部(12)，拨动部(12)与连动部(11)的一端连接，拨动部(12)具有卡槽(121)，卡槽(121)延伸至拨动部(12)相对的两端，卡槽(121)远离连动部(11)的侧壁上设有第二限位凸起(122)，第二限位凸起(122)和第一限位凸起(112)与卡槽(121)的底壁均间隔开，导风条(21)的至少部分位于卡槽(121)内且位于第二限位凸起(122)和卡槽(121)的底壁之间以及第一限位凸起(112)和卡槽(121)的底壁之间。
Patent WO-2021120073-A1 (WO)
Title: 开关结构、电池组件和电子设备
Inventor: Nong Guisheng
IPC: B64C27/08
Filed: 2019-12-18
Abstract: 一种开关结构(200)、电池组件(10)和电子设备(1000)，电子设备(1000)的电池(100)与电子设备本体(20)可拆卸连接，开关结构(200)的非闭合导电通路(210)设于电子设备本体(20)上；导通件(220)设于电池(100)上；非闭合导电通路(210)会随着电池(100)的插入，在导通件(220)的作用下与电池(100)本身形成电性导通通路。
Patent WO-2021012601-A1 (WO)
Inventor: DING RUI
IPC: H04L12/931
Filed: 2019-12-20
Abstract: Disclosed by the present invention are a message processing method and device, an apparatus and a readable storage medium. The method comprises: mapping a physical port of each of pre-planned assembly lines as a virtual interface, and adding the virtual interface into a container corresponding to the virtual interface; determining a target assembly line in the assembly lines for receiving messages, and detecting whether a message in the target assembly line is a control message, the messages including control messages and service messages; if the message is a control message, sending the control message from the target assembly line containing the control message to a target container such that the target container performs protocol processing to the control message, the target container being the container where the virtual interface corresponding to the target assembly line containing the control message is located. The present invention improves the use ratio of programmable switches.
Patent WO-2021127815-A1 (WO)
Title: 摄像光学镜头
Inventor: FU YANG
IPC: G02B13/00
Filed: 2019-12-23
Abstract: 一种摄像光学镜头（10），摄像光学镜头（10）自物侧至像侧依序包含：第一透镜（L1），第二透镜（L2），第三透镜（L3），第四透镜（L4），第五透镜（L5），第六透镜（L6），第七透镜（L7），以及第八透镜（L8）；摄像光学镜头（10）的焦距为f，第一透镜（L1）的焦距为f1，第二透镜（L2）的焦距为f2，第六透镜（L6）物侧面的曲率半径为R11，第六透镜（L6）像侧面的曲率半径为R12，第五透镜（L5）的轴上厚度为d9，第五透镜（L5）的像侧面到第六透镜（L6）的物侧面的轴上距离为d10，且满足下列关系式：0.90≤f1/f≤1.85；f2≤0.00；0.30≤(R11+R12)/(R11-R12)≤0.75；4.00≤d9/d10≤25.00。摄像光学镜头（10）具有良好光学性能的同时，满足大光圈、广角化、超薄化的设计要求。
Patent WO-2021114405-A1 (WO)
Title: 显示面板及显示装置
Inventor: LI XUEYUN
IPC: G02F1/1345
Filed: 2019-12-25
Abstract: 一种显示面板（1）及显示装置（2），通过将导电胶（15）设置在彩膜基板（13）的至少一角，或设于显示面板（1）远离焊盘区（121）的一条边上，从而不仅能够使得显示面板（1）的边框减小，而且也不影响其抗静电能力。
Patent WO-2020135558-A1 (WO)
Inventor: CHANG JUNREN
IPC: H04W28/02
Filed: 2019-12-26
Abstract: 本申请实施例提供了一种资源配置的方法。该方法包括：第一终端设备接收由目标小区广播的第一信息，第一信息包括N个侧链路SL资源指示信息和N个区域有效信息，其中N个SL资源指示信息中的每个SL资源指示信息用于指示SL资源，N个区域有效信息与N个SL资源指示信息一一对应，N个区域有效信息中的每个区域有效信息用于指示对应的SL资源的可用区域，每个区域有效信息所指示的可用区域包括至少两个区域，N为大于或等于1的正整数，第一终端设备为终端设备组中的一个终端设备；第一终端设备根据第一信息，确定目标SL资源，目标SL资源是N个SL资源指示信息中的一个所指示的SL资源。上述技术方案实现了终端之间跨区域SL通信。
Patent WO-2021120270-A1 (WO)
Inventor: LIU MING
IPC: G02B6/42
Filed: 2019-12-26
Abstract: A composite material for an optically coupled output lens (201, 202, 203) of a quantum dot display panel (10), and a manufacturing method. The composite material comprises: trimethylolpropane tris(3-mercaptopropionate), triethylene glycol divinyl ether, and a free radical UV initiator, wherein a molar ratio of trimethylolpropane tris(3-mercaptopropionate) to triethylene glycol divinyl ether is 2:3. UV curing is used to form the optically coupled output lens (201, 202, 203). The manufacturing method for the optically coupled output lens (201, 202, 203) comprises: mixing trimethylolpropane tris(3-mercaptopropionate) and triethylene glycol divinyl ether; adding the free radical UV initiator, and forming the composite material for the optically coupled output lens (201, 202, 203); disposing the composite material on a thin film encapsulation layer (108) of the quantum dot display panel (10), performing a UV curing procedure on the composite material, and forming the optically coupled output lens (201, 202, 203).
Patent WO-2020147554-A1 (WO)
Inventor: WU LU
IPC: H04W72/00
Filed: 2019-12-27
Abstract: 本申请公开了一种被用于无线通信的用户设备、基站中的方法和装置。用户设备接收第一信令，接收第二信令；然后在第一时频资源块中发送第一无线信号，或者，在第二时频资源块中发送第一无线信号。所述第一信令被用于确定参考时频资源块，所述参考时频资源块被预留给第一比特块；所述第二信令被用于确定目标时频资源块集合；所述目标时频资源块集合包括所述第一时频资源块和所述第二时频资源块；所述第一无线信号承载所述第一比特块；所述参考时频资源块对应第三参考信号组；所述第一无线信号在所述第一时频资源块中被发送，所述第三参考信号组被用于确定所述第一无线信号的发送天线端口；或者，所述第一无线信号在所述第二时频资源块中被发送。
Patent WO-2020211481-A1 (WO)
Inventor: ZHANG YIXIANG
IPC: G06Q20/40
Filed: 2020-01-08
Abstract: 用于生成区块链授权信息的方法、装置及系统，所述方法包括：接收客户端发送的用于请求生成区块链授权信息的区块链授权信息生成请求（120），所述区块链授权信息生成请求包括目标区块链标识和用户信息；获取与所述目标区块链标识匹配的区块链参数（140）；以及基于所获取的区块链参数和所述用户信息，生成所述区块链授权信息（160）。
Patent WO-2020147634-A1 (WO)
Inventor: LUO ZHIHU
IPC: H04L27/26
Filed: 2020-01-09
Abstract: 本申请实施例公开了一种信号传输方法及其相关设备，用于网络设备与终端设备之间的信号传输。本申请实施例方法包括：向第一终端设备发送第一同步信号/广播信道块SSB，所述第一SSB包括同步信号和物理广播信道PBCH，所述同步信号与所述PBCH在资源占用方式上采用频分复用FDM方式，其中，所述同步信号占用的正交频分复用OFDM符号数大于2，所述PBCH占用的所述OFDM符号数大于3。
Patent WO-2021128525-A1 (WO)
Title: 一种手术系统、手术系统控制及手术控制方法
Inventor: TAN PU
IPC: A61B34/37
Filed: 2020-01-20
Abstract: 本发明公开了一种手术系统、手术控制系统及手术控制方法，该手术系统包括操作端、执行端及该手术控制系统，其中，操作端包括握持部、基座及操作响应机构，操作端的各关节根据握持部的受力自适应的分解动作；执行端包括末端执行器及用于带动末端执行器动作的执行机构，执行机构用于带动所述末端执行器动作；手术控制系统包括传感器及处理器，传感器用于采集各所述分解动作的动作数据，处理器用于根据动作数据控制执行机构动作，使末端执行器的路径与对应关节或握持部的路径相对应。本发明，通过改变握持部的路径，使执行端的末端执行器对应相应关节的移动路径或握持部的移动路径，操作更直观，操控体验更好，能够降低误操控率。
Patent WO-2021142862-A1 (WO)
Title: Liquid testing apparatus, holding tank, device, and testing method
Inventor: SHI LEIJUN
IPC: G01N27/22
Filed: 2020-02-05
Abstract: Provided are a liquid testing apparatus, a holding tank, a device, and a testing method. A first acoustic wave testing component (21) of the testing apparatus is used, at a preset distance, to transmit an acoustic wave and receive a test wave corresponding to the acoustic wave in a liquid (11); a temperature measurement component (22) is used to measure the temperature of the liquid (11); a power supply component is electrically connected to the first acoustic wave testing component (21), the temperature measurement component (22) and a controller; and the controller is electrically connected to the first acoustic wave testing component (21) and the temperature measurement component (22), so as to calculate an acoustic wave propagation velocity in the liquid (11) according to the preset distance, the time at which the first acoustic wave testing component (21) transmits a first acoustic wave, and the testing time at which the first acoustic wave testing component receives a test wave corresponding to the first acoustic wave, and to then determine a liquid type or a liquid concentration according to the acoustic wave propagation velocity in the liquid (11) and the temperature of the liquid (11) measured by the temperature measurement component (22). The liquid testing apparatus automatically tests a liquid in real time, and determines a liquid type or a liquid concentration in real time, such that the labor costs used are reduced.
Patent WO-2021163945-A1 (WO)
Title: Method of programming multi-plane memory device
Inventor: DENG JIALIANG
IPC: G06F3/06
Filed: 2020-02-20
Abstract: A memory device includes a plurality of planes, a row driver and a controller. A method of programming the memory device includes in a program operation, the row driver applying a program pulse to a plurality of memory cells of a first plane of the plurality of planes; after the row driver applies the program pulse to the plurality of memory cells, the controller verifying if the plurality of memory cells have reached a predetermined program state; and if a preset number of the plurality of memory cells have failed to reach the predetermined program state after the plurality of memory cells have been verified for a predetermined number of times, the controller disabling the first plane.
Patent WO-2021134912-A1 (WO)
Title: Multi-purpose electric rice cooker
Inventor: BAI SHUNKE
IPC: A47J27/00
Filed: 2020-03-06
Abstract: A multi-purpose electric rice cooker, comprising a cooker body (1), a cooker pot (2), a cooker lid (3), a columnar tank (4), a safety valve (5), a sealing cover (6), and a controller (7), the cooker pot (2) being arranged in the cooker body (1), the safety valve (5) being penetratingly arranged in the cooker lid (3), and the controller (7) being arranged in a side wall of the cooker body (1). The columnar tank (3) consists of a columnar tank screw base (41), a sealing ring (42), a columnar tank base ring (43), a columnar tank locking ring (44), a return spring (45), a plunger (46), a broth ring (47), and a handle (48). The broth ring (47) is detachably arranged on an external screw thread on a lower end of the columnar tank base ring (43) by means of an upper edge inside screw thread, and the plunger (46) is slidably connected into an inner wall of the columnar tank base ring (43) by means of an outer edge of a plunger disc (461).
Patent WO-2020199860-A1 (WO)
Inventor: YU HAIJIA
IPC: G01N33/577
Filed: 2020-03-10
Abstract: Provided is an anti-PD-L1 monoclonal antibody. The antibody can be used to prepare a drug for preventing or treating a disease related to PD-L1.
Patent WO-2020192617-A1 (WO)
Inventor: CAI YOUGEN
IPC: C21D1/18
Filed: 2020-03-23
Abstract: 一种普通锻钢辊坯生产硅钢冷轧工作辊的方法，材料配比增加了镍，在调质过程中根据所需轧辊工作厚度对保温温度和保温时间进行实时调整，并且通过深冷保温处理，提高轧辊表面的耐磨性、硬度、淬硬层深度以及后期使用中的抗剥落性；并且通过专用的深冷设备进行深冷处理，使轧辊表面处理更加均匀。通过沉淀管和吹风装置，将沉淀在底部的氮气重新吹回至深冷箱内，减少了液氮的使用，同时也促进了深冷箱内气体的运动。
Patent WO-2020211825-A1 (WO)
Inventor: MENG XIANQIN
IPC: H04N5/238
Filed: 2020-04-17
Abstract: The present disclosure provides an iris diaphragm and a control method therefor. The iris diaphragm comprises: a first substrate and a second substrate which are arranged opposite each other; a light detector located on the side of the first substrate away from the second substrate and used for detecting the light intensity of incident light and generating a first signal; an electrowetting microfluidic dielectric layer located between the first substrate and the second substrate and comprising a light-transmitting fluid medium and a light-tight fluid medium immiscible with the light-transmitting fluid medium, a diaphragm opening being formed by means of the light-transmitting fluid medium, one of the light-transmitting fluid medium and the light-tight fluid medium being a conductive medium; a driving electrode provided between the first substrate and the second substrate, and configured to receive a driving voltage that corresponds to the first signal and used for driving the electrowetting microfluidic dielectric layer, so as to change the aperture of the diaphragm opening by changing the area of a region being covered by the light-tight fluid medium in a direction parallel to the first substrate or to the second substrate, said region being a region on either the first substrate or the second substrate whichever has the larger contact area with the light-tight fluid medium.
Patent WO-2021042732-A1 (WO)
Title: Osteogenic growth peptide carbon-terminal pentapeptide derivative, preparation method therefor, and use thereof
Inventor: ZHANG TENG
IPC: C07K7/52
Filed: 2020-04-17
Abstract: The present invention provides an osteogenic growth peptide carbon-terminal pentapeptide derivative, a preparation method therefor, and use thereof. The osteogenic growth peptide carbon-terminal pentapeptide derivative includes one or more of H-Dopa-Gly-Phe-Gly-Gly-OH, H-D-Tyr-Pro-D-Phe-Gly-Gly-OH, Cyclo(Gly-Gly-D-Phe-Pro-D-Tyr), Cyclo(Tyr-Gly-D-Phe-Gly-Gly), Cyclo(D-Tyr-Gly-Phe-Gly-Gly), Cyclo(Gly-Gly-D-Phe-Gly-Tyr), and Cyclo(Gly-Gly-Phe-Gly-D-Tyr). Said derivative retains pharmacophores Tyr10 and Phe12 of the original pentapeptide in the structure, and have the structural feature of improving metabolic stability.
Patent WO-2021036299-A1 (WO)
Inventor: HUANG FEI
IPC: G09G3/32
Filed: 2020-04-22
Abstract: A pixel driving circuit (1) and a display panel. The pixel driving circuit (1) comprises a drive module (10), a data write module (20), a storage module (30), and an interference filter module (40), wherein the drive module (10) is configured to drive a light-emitting device (LED) to emit light; the data write module (20) is configured to write a data signal to the storage module (30); the storage module (30) is configured to regulate, according to the data signal, the time when a first power supply signal (VDD) and a second power supply signal (VSS) are written to a control end (A1) of the drive module (10), and is configured to maintain the potential of the control end (A1) of the drive module (10); and the interference filter module (40) is configured to filter out an interference signal in an electric signal transmitted to the control end (A1) of the drive module (10).
Patent WO-2020244328-A1 (WO)
Title: 图像处理方法及装置
Inventor: HAO PENG
IPC: H04N19/146
Filed: 2020-04-23
Abstract: 本公开提供一种图像处理方法及装置，涉及图像处理技术领域，解决现有技术在追求高压缩率的同时无法平衡图像质量的问题。具体技术方案为：通过获取当前可用带宽B以及计算目标图像在预设的图像编码质量等级下编码传输所需带宽B  i ，根据B  i 是否大于B以及结合不同的限定条件确定出当前最合适的图像编码质量等级并基于该等级的量化参数编码处理目标图像，从而解决现有技术在追求高压缩率的同时无法平衡图像质量的问题。
Patent WO-2021012747-A1 (WO)
Inventor: ZHANG JUN
IPC: H03M1/66
Filed: 2020-04-30
Abstract: A digital-to-analog conversion circuit, comprising: an R-2R resistive network (10) configured to be connected between an output end and a ground end; an output voltage selection unit (20) configured to be connected between the output end of the R-2R resistive network (10) and a voltage output terminal; an output voltage trimming unit (30), wherein the output voltage trimming unit (30) is provided between a 2R resistor on at least one branch of the R-2R resistive network (10) and the ground end.
Patent WO-2021217692-A1 (WO)
Inventor: TENG NIANJUN
IPC: A01N3/02
Filed: 2020-05-07
Abstract: Disclosed in the present invention are a cut lily preservation solution and an application therefor, the formulation of the preservation solution being: 120-200mg·L -1 GA 3 +20mg·L -1 8-HQ+150mg·L -1 citric acid+20g·L -1 sucrose. The preservation solution formulation of the present invention is used for the preservation of several mainstream lilies in the market, and can significantly extend the life of vases of cut lilies and increase the ornamental value of cut lilies, prolonging the life of all vases of cut lilies to 7 days, 2.58-2.70 times longer than that of a control vase. Use of the cut lily preservation solution of the present invention is very convenient, and ordinary residents can use tap water at home to directly dilute the mother solution or dissolve the powdered preservative mixture, which is conducive to wide promotion and application. Finally, the cut lily preservation solution of the present invention is safe for the human body and environmentally friendly.
Patent WO-2021226933-A1 (WO)
Title: Spatial relation and pathloss reference signal for multi-trp operation
Inventor: ZHANG YUSHU
IPC: H04W72/04
Filed: 2020-05-14
Abstract: A user equipment (UE) in a multiple transmission and reception point (multi-TRP) configuration having simultaneous connections with a first next generation node B (gNB) and at least one second gNB over a same carrier. The UE divides uplink (UL) resources into a plurality of groups, determines a spatial relation and a pathloss reference signal (RS) for each one of the plurality of groups based on a transmission configuration indication (TCI) indicating a quasi-co-location (QCL) source RS for a downlink channel and transmits UL data on the UL resources corresponding to each one of the plurality of groups to a respective one of the first gNB or the at least one second gNB.
Patent WO-2021088356-A1 (WO)
Inventor: HUANG CHEN
IPC: G05B19/418
Filed: 2020-05-27
Abstract: A smart home control device. A voltage reduction circuit reduces the voltage of electric energy provided by a storage battery (1) and supplies power to a touch screen (2), a processor (3), a wireless communication module (5) and an infrared communication module (6). Moreover, an electric quantity monitoring circuit (4) monitors, in real time, the electric quantity provided by the storage battery (1), and sends the detected electric quantity to the processor (3). A control instruction is input by means of the touch screen (2), the control instruction is then sent to a smart device in a house by means of the wireless communication module (5), and the control instruction is sent to a non-smart device in the house by means of the infrared communication module (6), thereby realizing control over a household appliance.
Patent WO-2020259278-A1 (WO)
Inventor: WANG JUNTAO
IPC: H04W24/02
Filed: 2020-06-09
Abstract: Embodiments of the present invention provide a terminal mobility management method, a base station, a network device, a system, and a storage medium. Rather than learning, according to manual configurations, about whether a core network interface between a first network device and a second network device exists and is normal in advance, the base station "attemptively" sends a switching request to the first network device when a terminal needs to access a target base station, learns about a state of a core network interface according to feedback, and when determining that no normal core network interface exists between the first network device and the second network device, allows the terminal to access the target base station in a redirection mode.
Patent WO-2021227189-A1 (WO)
Inventor: RU CHANGHAI
IPC: G06T7/73
Filed: 2020-06-16
Abstract: 本发明公开了一种基于机器视觉的显微操作平台误差自主矫正算法，该方法包括：将标尺放置在显微操作平台上，以固定步进分别让显微操作平台沿固定方向移动并获取标尺图像，并保证前后两张图像有部分重叠；将该方向的前后两张图像进行拼接；计算显微操作平台在该方向的系统误差；对该方向的系统误差进行自主补偿，矫正该方向系统误差。本发明基于图像拼接技术对当前影响显微注射精度的机械误差、CCD安装误差以及像素/微米转换等误差进行集成统一，无须人工辅助，可实现自主补偿矫正，误差可控制在像素级别。此外，本发明提出的算法不仅适用于显微操作系统，也适用于其他移动平台的误差矫正，不仅操作简单，同时具备高效率、精度高等特点。
Patent WO-2022000225-A1 (WO)
Inventor: WANG HAN
IPC: G06N3/04
Filed: 2020-06-30
Abstract: A convolutional neural network data processing method and a related device, being specifically used in the field of convolutional neural networks. The method comprises: obtaining an input matrix, elements of the input matrix being partial derivatives of a loss function with respect to an output feature map obtained by forwarding a convolutional neural network; obtaining a first convolution kernel of the convolutional neural network, wherein the size of the first convolution kernel is n*n, and a movement step of the first convolution kernel is m; splitting the first convolution kernel according to the movement step m to obtain a plurality of sub-convolution kernels; performing a convolution multiplication operation on each sub-convolution kernel in the plurality of sub-convolution kernels and the input matrix to obtain a plurality of sub-result matrices; and combining elements in the plurality of sub-result matrices according to the movement step m to obtain an output result. Thus, the output result of reverse transmission can be efficiently solved, and reverse transmission of a loss value can be achieved.
Patent WO-2022011699-A1 (WO)
Title: Communication method and sidelink device
Inventor: LI CHAO
IPC: H04W72/04
Filed: 2020-07-17
Abstract: Provided in the present application are a communication method and a sidelink device, wherein same are applied to the technical field of communications. The method comprises: a first sidelink device determining first indication information and first sidelink resource information, and the first sidelink device sending the first indication information and the first sidelink resource information to a second sidelink device, wherein the first indication information is used to indicate that the first sidelink resource information comprises assistance information, and the assistance information is used to assist the second sidelink device with selecting resources. After receiving the first indication information and the assistance information, the second sidelink device can learn of the condition of surrounding related resources, comprising, for example, channel measurement information of a resource pool, and the resource occupancy condition of other communication devices with which the second sidelink device cannot communicate directly, etc. The second sidelink device can perform resource selection according to the assistance information, and acquires, by means of the resource selection, available resources which are capable of sending information, thereby avoiding resource conflicts with other sidelink communication devices.
Patent WO-2021120626-A1 (WO)
Inventor: FENG SHAOJIANG
IPC: G06T3/00
Filed: 2020-07-24
Abstract: The present application relates to an image processing method, a terminal, and a computer storge medium. The image processing method is applied to the terminal and comprises: obtaining an image to be processed; performing feature recognition on a portrait of said image to obtain at least two portrait features of said image; and performing facial beautification processing on a corresponding region of the at least one portrait feature, and/or performing no facial beautification processing on the corresponding region of the at least one portrait feature. According to the image processing method, the terminal, and the computer storage medium provided by the present application, the terminal obtains at least two portrait features obtained by performing feature recognition on a portrait of an image to be processed, and performs facial beautification processing on a corresponding region of the at least one portrait feature and/or perform no facial beautification processing on the corresponding region of the at least one portrait feature, so as to implement personalized facial beautification processing of a user according to user features, thereby improving the use experience of the user.
Patent WO-2022021375-A1 (WO)
Inventor: XIE HAO
IPC: G06K9/00
Filed: 2020-07-31
Abstract: Embodiments of the present application provide an ultrasonic fingerprint recognition apparatus and an electronic device, which can effectively improve the accuracy of fingerprint recognition. The ultrasonic fingerprint recognition apparatus is applicable to an electronic device having a display screen, is provided below the display screen, and comprises: a pixel unit array, comprising a first type pixel unit and a second type pixel unit. The first type pixel unit has piezoelectricity, and is used for transmitting an ultrasonic signal to a finger above the display screen and receiving the returned ultrasonic signal to obtain a first pixel signal. The second type pixel unit does not have piezoelectricity, and is used for obtaining a second pixel signal when the first type pixel unit obtains the first pixel unit. A first difference signal between the first pixel signal and the second pixel signal is used for obtaining a fingerprint image.