WO2023240608A1 - Procédé de reconnaissance d'empreintes digitales intra-écran, appareil, terminal et support de stockage - Google Patents

Procédé de reconnaissance d'empreintes digitales intra-écran, appareil, terminal et support de stockage Download PDF

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Publication number
WO2023240608A1
WO2023240608A1 PCT/CN2022/099500 CN2022099500W WO2023240608A1 WO 2023240608 A1 WO2023240608 A1 WO 2023240608A1 CN 2022099500 W CN2022099500 W CN 2022099500W WO 2023240608 A1 WO2023240608 A1 WO 2023240608A1
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Prior art keywords
fingerprint
fingerprint image
under
screen
recognition
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PCT/CN2022/099500
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English (en)
Chinese (zh)
Inventor
王刚
王愈
Original Assignee
北京小米移动软件有限公司
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Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to PCT/CN2022/099500 priority Critical patent/WO2023240608A1/fr
Priority to CN202280004408.9A priority patent/CN117616476A/zh
Publication of WO2023240608A1 publication Critical patent/WO2023240608A1/fr

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  • the present disclosure relates to the field of terminals, and in particular, to an under-screen fingerprint identification method, device, terminal and storage medium.
  • under-screen optical fingerprint recognition is affected by the principle. It requires continuous exposure for a fixed period of time after the light spot lights up to obtain the fingerprint image, and then performs operations such as transmitting, processing, and identifying the fingerprint image. The fingerprint recognition takes a longer time and the experience is longer. Difference.
  • the present disclosure provides an under-screen fingerprint identification method, device, terminal and storage medium.
  • an under-screen fingerprint identification method is provided and applied to a terminal, wherein the under-screen fingerprint identification method includes:
  • the off-screen fingerprint recognition operation is detected, and the exposure is continued for the first duration; where the first duration is less than the target exposure duration;
  • a fingerprint recognition process corresponding to the quality level is performed.
  • a fingerprint recognition process corresponding to the quality level is performed, including:
  • the recognition result of the under-screen fingerprint is successful, and the corresponding application is executed based on the recognition result of the under-screen fingerprint.
  • Under-screen fingerprint recognition methods include:
  • the exposure is continued for a second length of time
  • the fingerprint identification method After identifying the first fingerprint image, the fingerprint identification method includes:
  • the recognition result of the under-screen fingerprint is determined based on the second fingerprint image; wherein the second fingerprint image is determined based on the fingerprint data collected during the second time period.
  • the under-screen fingerprint recognition method includes:
  • the fingerprint data collected for the second period of time are transmitted, and the second fingerprint image is determined based on the fingerprint data collected for the second period of time.
  • the under-screen fingerprint recognition methods include:
  • a fingerprint recognition process corresponding to the quality level is performed, including:
  • the quality level of the first fingerprint image is not the first level, then determine the quality level of the third fingerprint image; wherein the third fingerprint image is determined based on the fingerprint data collected during the first time period and the fingerprint data collected during the third time period;
  • a fingerprint recognition process corresponding to the quality level is performed.
  • the under-screen fingerprint recognition method includes:
  • the fingerprint data collected in the third period of time are transmitted, and the third fingerprint image is determined based on the fingerprint data collected in the first period of time and the fingerprint data collected in the third period of time.
  • a fingerprint recognition process corresponding to the quality level is performed, including:
  • the third fingerprint image is identified; wherein the quality of the fingerprint corresponding to the second level is smaller than the quality of the fingerprint corresponding to the first level;
  • the recognition result of the under-screen fingerprint is determined to be successful.
  • Under-screen fingerprint recognition methods include:
  • the exposure is continued for a fourth length of time
  • the under-screen fingerprint identification method includes:
  • the recognition result of the under-screen fingerprint is determined based on the fourth fingerprint image; wherein the fourth fingerprint image is determined based on the fingerprint data collected during the fourth time period.
  • the under-screen fingerprint recognition method includes:
  • the fingerprint data collected in the fourth period of time are transmitted, and the fourth fingerprint image is determined based on the fingerprint data collected in the fourth period of time.
  • the under-screen fingerprint recognition methods include:
  • a fingerprint recognition process corresponding to the quality level is performed, including:
  • the recognition result of the under-screen fingerprint is determined based on the fifth fingerprint image; where the fingerprint quality corresponding to the third level is smaller than the fingerprint quality corresponding to the second level, and the fifth fingerprint image Determined based on the fingerprint data collected in the first period of time, the fingerprint data collected in the third period of time and the fingerprint data collected in the fifth period of time.
  • the under-screen fingerprint recognition method includes:
  • the fingerprint data collected in the fifth time period is transmitted, and the fifth fingerprint image is determined based on the fingerprint data collected in the first time period, the fingerprint data collected in the third time period, and the fingerprint data collected in the fifth time period.
  • an under-screen fingerprint recognition device applied to a terminal, wherein the under-screen fingerprint recognition device includes:
  • the exposure module is configured to detect an off-screen fingerprint recognition operation and continue to expose for a first duration; wherein the first duration is less than the target exposure duration;
  • the judgment module is configured to judge the quality level of the first fingerprint image; wherein the first fingerprint image is determined based on the fingerprint data collected for the first time period;
  • the identification module is configured to, according to the quality level of the first fingerprint image, perform a fingerprint identification process corresponding to the quality level.
  • the identification module is configured as:
  • the recognition result of the under-screen fingerprint is successful, and the corresponding application is executed based on the recognition result of the under-screen fingerprint.
  • the exposure module is configured to continue exposing the first fingerprint image for a second duration during the process of identifying the first fingerprint image
  • the identification module is configured to, after identifying the first fingerprint image, if the identification of the first fingerprint image fails, determine the identification result of the under-screen fingerprint based on the second fingerprint image; wherein the second fingerprint image is based on the fingerprint collected for the second time period. Fingerprint data confirmed.
  • the under-screen fingerprint recognition device includes a transmission module and a determination module
  • the transmission module is configured to, after failing to recognize the first fingerprint image, transmit the fingerprint data collected for the second period of time;
  • the determining module is configured to determine the second fingerprint image based on the fingerprint data collected for the second period of time.
  • the exposure module is configured to continue the exposure for a third duration after the first duration of exposure
  • the judgment module is configured to, if it is determined that the quality level of the first fingerprint image is not the first level, then judge the quality level of the third fingerprint image; wherein the third fingerprint image is based on the fingerprint data collected in the first time period and the fingerprint data collected in the third time period. The fingerprint data is determined;
  • the identification module is configured to, according to the quality level of the third fingerprint image, perform a fingerprint identification process corresponding to the quality level.
  • the under-screen fingerprint recognition device includes a transmission module and a determination module
  • the transmission module is configured to, after determining that the quality level of the first fingerprint image is not the first level, transmit the fingerprint data collected for the third period of time;
  • the determining module is configured to determine the third fingerprint image based on the fingerprint data collected during the first time period and the fingerprint data collected during the third time period.
  • the identification module is configured as:
  • the third fingerprint image is identified; wherein the quality of the fingerprint corresponding to the second level is smaller than the quality of the fingerprint corresponding to the first level;
  • the recognition result of the under-screen fingerprint is determined to be successful.
  • the exposure module is configured to continue exposing for a fourth duration during the process of identifying the third fingerprint image
  • the recognition module is configured to, if the recognition of the third fingerprint image fails, determine the recognition result of the under-screen fingerprint based on the fourth fingerprint image; wherein the fourth fingerprint image is determined based on the fingerprint data collected during the fourth time period.
  • the under-screen fingerprint recognition device includes a transmission module and a determination module
  • the transmission module is configured to transmit the fingerprint data collected for the fourth period of time after the third fingerprint image recognition fails;
  • the determining module is configured to determine a fourth fingerprint image based on the fingerprint data collected for a fourth period of time.
  • the exposure module is configured to continue the exposure for a fifth duration after the third duration of exposure
  • the identification module is configured to, if it is determined that the quality level of the third fingerprint image is the third level, determine the recognition result of the under-screen fingerprint based on the fifth fingerprint image; wherein the quality of the fingerprint corresponding to the third level is smaller than that of the fingerprint corresponding to the second level. Quality, the fifth fingerprint image is determined based on the fingerprint data collected in the first period, the fingerprint data collected in the third period, and the fingerprint data collected in the fifth period.
  • the under-screen fingerprint recognition device includes a transmission module and a determination module
  • the transmission module is configured to, after determining that the quality level of the third fingerprint image is the third level, transmit the fingerprint data collected for the fifth time period;
  • the determination module is configured to determine the fifth fingerprint image based on the fingerprint data collected during the first time period, the fingerprint data collected during the third time period, and the fingerprint data collected during the fifth time period.
  • a terminal wherein the terminal includes:
  • Memory used to store instructions executable by the processor
  • the processor is configured to execute the under-screen fingerprint recognition method as in the first aspect.
  • a non-transitory computer-readable storage medium wherein when instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to perform under-screen fingerprinting as in the first aspect recognition methods.
  • the technical solutions provided by embodiments of the present disclosure may include the following beneficial effects:
  • a first duration of exposure is first performed, and the corresponding quality is performed based on the quality level of the first fingerprint image obtained for the first duration.
  • a high-level fingerprint recognition process is used to determine the recognition results of the fingerprint under the screen, improve the entire fingerprint recognition process, and enhance the user experience. In particular, it can greatly improve the fingerprint recognition experience of fingerprint images with better fingerprint quality.
  • FIG. 1 is a flow chart of an under-screen fingerprint recognition method according to an exemplary embodiment.
  • FIG. 2 is a schematic diagram of an under-screen fingerprint recognition method according to an exemplary embodiment.
  • Figure 3 is a block diagram of an under-screen fingerprint recognition device according to an exemplary embodiment.
  • Figure 4 is a block diagram of a terminal according to an exemplary embodiment.
  • Retry0 and Retry1 Two fingerprint identification processes are generally set up, which are recorded as Retry0 and Retry1 respectively.
  • both Retry0 and Retry1 require exposure to collect fingerprint data, fingerprint data transmission and processing, fingerprint image recognition, etc.
  • Retry1 will only be entered after Retry0 ends, resulting in a time-consuming longer.
  • the fingerprint quality of fingerprint images is not distinguished, and the above-mentioned serial fingerprint identification process is adopted.
  • the duration required for exposure and collection of fingerprint data is the same. This duration is generally longer and can be recorded as the target exposure duration T′ 1 . This duration is used for collecting fingerprint data.
  • the time required for the transmission and processing of fingerprint data can generally be recorded as the target processing time T′ 2 , which is used to transmit and process the fingerprint data to obtain the fingerprint image.
  • the time required for fingerprint image recognition can generally be recorded as the target recognition time T′ 3 , which is used to recognize fingerprint images.
  • Embodiments of the present disclosure provide an under-screen fingerprint identification method, which is applied to terminals.
  • the first exposure time is first exposed, and based on the quality level of the first fingerprint image obtained for the first time period, a fingerprint recognition process corresponding to the quality level is performed to determine the recognition result of the under-screen fingerprint, improve the entire fingerprint recognition process, and enhance the user experience.
  • the user experience can especially greatly improve the fingerprint recognition experience of fingerprint images with better fingerprint quality.
  • an under-screen fingerprint recognition method is provided and applied to a terminal.
  • the method may include:
  • the off-screen fingerprint recognition operation is detected, and the exposure is continued for a first duration; wherein the first duration is less than the target exposure duration;
  • the terminal may include an optical fingerprint sensor.
  • the terminal detects the fingerprint recognition operation under the screen, it can light up the light spot, allowing the terminal to continue to be exposed for the first time.
  • the terminal can collect fingerprint data through the optical fingerprint sensor, and this fingerprint data can be recorded as the first fingerprint data.
  • the terminal collects the first fingerprint data, transmits the first fingerprint data, and then determines the first fingerprint image based on the first fingerprint data.
  • the first duration can be recorded as T 1 .
  • the first duration T 1 can be smaller than the target exposure duration T′ 1 , and the specific value can be set according to the actual situation, and there is no limit to this.
  • the target exposure time refers to the exposure time of each fingerprint recognition process in related technologies.
  • the first duration T 1 may be T′ 1 /2.
  • step S120 after the terminal determines the first fingerprint image, it can determine the quality level of the first fingerprint image.
  • the first fingerprint quality value of the first fingerprint image may be determined first, and then the quality level of the first fingerprint image may be determined based on the first fingerprint quality value.
  • the first fingerprint quality value may be used to characterize the overall valley and ridge clarity of the first fingerprint image. It should be noted that the higher the quality value of the first fingerprint, the higher the accuracy of subsequent fingerprint recognition.
  • At least two quality levels can be set, and a corresponding fingerprint quality threshold can be set for each quality level.
  • the fingerprint quality threshold to which the first fingerprint quality value belongs can be determined as the target threshold. Then the quality level corresponding to the target threshold is determined as the quality level corresponding to the first fingerprint image.
  • the fingerprint quality threshold may be set before the terminal leaves the factory, or may be set after the terminal leaves the factory, and there is no limit to this. Moreover, after the fingerprint quality threshold is set, it can be modified later to better meet the different needs of users. In addition, the specific range of the fingerprint quality threshold is not limited and can be set according to actual conditions.
  • fingerprint image recognition generally also includes fingerprint matching recognition and anti-counterfeiting recognition.
  • Matching recognition refers to comparing the collected fingerprint image with the preset fingerprint image.
  • Anti-counterfeiting identification refers to determining whether the collected fingerprint image is a genuine fingerprint image.
  • matching identification and anti-counterfeiting identification are generally performed in series and require a long time, which is generally recorded as the conventional identification time T′ 3 .
  • DSP digital signal processing
  • the time required for fingerprint recognition in this disclosure can be recorded as the fingerprint recognition time T 3 .
  • the fingerprint recognition time T 3 may be shorter than the target recognition time T′ 3 .
  • the difference between the fingerprint recognition time T 3 and the target recognition time T′ 3 is the time optimized by DSP technology, and this time can be recorded as the recognition optimization time T 4 .
  • first fingerprint images of different quality levels may correspond to different fingerprint recognition processes. After the quality level corresponding to the first fingerprint image is determined, the fingerprint recognition process corresponding to the quality level can be performed.
  • the quality level of the first fingerprint image is the quality level corresponding to a good fingerprint
  • the fingerprint data collected this time can be considered to be a good fingerprint
  • fingerprint recognition can be directly performed on the first fingerprint image. If the recognition is successful, the corresponding function can be executed.
  • the corresponding function can be unlocking, logging in or paying, etc., and there is no limit to this.
  • the first fingerprint image can be matched with the set fingerprint image to determine the fingerprint recognition result. For example, if the first fingerprint image successfully matches the set fingerprint image, it can be determined that the fingerprint is a different one and the recognition is successful.
  • the quality level of fingerprint images is introduced.
  • the recognition process improves the user experience, especially the fingerprint recognition experience of fingerprint images with better fingerprint quality.
  • an under-screen fingerprint recognition method is provided and applied to a terminal.
  • executing a fingerprint recognition process corresponding to the quality level may include:
  • the first level indicates that the fingerprint quality value of the first fingerprint image is higher.
  • the first level indicates that the fingerprint corresponding to the first fingerprint image is a good fingerprint, which is more convenient for fingerprint identification.
  • the first fingerprint quality value of the first fingerprint image may be determined first, and then the quality level of the first fingerprint image may be determined based on the first fingerprint quality value.
  • the first fingerprint quality value may be used to characterize the overall valley and ridge clarity of the first fingerprint image. It should be noted that the higher the quality value of the first fingerprint, the higher the accuracy of subsequent fingerprint recognition.
  • the present disclosure can detect the image spine area based on image contrast, or binarize the image, or rely on the number of image samples to implement fingerprint quality assessment of the fingerprint image and determine the fingerprint quality value.
  • the fingerprint quality value can also be determined by other methods, which is not limited. Among them, the fingerprint quality value can generally be divided into 100 values from 1 to 100. The larger the value, the better the fingerprint quality.
  • the terminal may preset a first fingerprint quality threshold, and the quality level corresponding to the first fingerprint quality threshold may be the first level.
  • the first fingerprint quality threshold may be greater than or equal to the fingerprint quality value 800. If it is determined that the fingerprint quality value of the first fingerprint image is greater than or equal to 800, it means that the fingerprint quality value of the first fingerprint image belongs to the first fingerprint quality threshold, and the quality level corresponding to the first fingerprint image can be determined to be the first level.
  • the first fingerprint image can be identified.
  • step S220 if it is determined that the recognition of the first fingerprint image is successful, it can be directly determined that the recognition result of the under-screen fingerprint is successful. Then, the terminal can execute corresponding applications such as unlocking, logging in or paying.
  • the mobile phone When the user unlocks the mobile phone, after the mobile phone detects the fingerprint recognition operation under the screen, it can light up the light spot and continue to expose it for a first period of time T 1 so that the optical fingerprint sensor of the mobile phone collects fingerprint data.
  • the optical fingerprint sensor After the optical fingerprint sensor collects the fingerprint data, it can transmit it to the processor of the mobile phone, and the processor of the mobile phone can determine the first fingerprint image based on the fingerprint data. From the time the optical fingerprint sensor collects the fingerprint data to the processor determining the first fingerprint image, this period of time is used to transmit and process the fingerprint data to determine the first fingerprint image. The required time can be recorded as the information processing time T 2 , where The information processing duration T 2 may be the same as the target processing duration T′ 2 .
  • the processor determines the first fingerprint image, it can determine the quality level of the first fingerprint image. If it is determined that the quality level of the first fingerprint image is the first level, fingerprint recognition can be performed on the first fingerprint image based on DSP technology. If the fingerprint recognition is confirmed to be successful, the phone can be unlocked. The time required for fingerprint recognition can be recorded as the fingerprint recognition time T 3 .
  • the time required for the entire fingerprint identification process is T 1 +T 2 +T 3 , which is the fastest process time for good fingerprints.
  • the first duration T 1 may be equal to 1/2 of the target exposure duration T′ 1
  • the fingerprint recognition duration T 3 may be equal to the target recognition duration T′ 3 minus the optimized duration T 4 of the DSP technology. That is, the fastest process time required for good fingerprints in this implementation method can be shortened compared with the fastest process time required for good fingerprints in related technologies.
  • a fingerprint recognition process corresponding to the quality level is performed according to the quality level of the first fingerprint image.
  • the quality level of the first fingerprint image is the first level
  • the first fingerprint image can be directly identified, and if the identification is successful, the corresponding application can be executed.
  • This method can improve the entire fingerprint recognition process and enhance the user experience. In particular, it can greatly improve the fingerprint recognition experience of good fingerprints.
  • an under-screen fingerprint recognition method is provided and applied to a terminal. Referring to FIG. 2 , in this method, during the process of identifying the first fingerprint image, the exposure can be continued for a second length of time.
  • the light spot can be lit and exposed for a second period of time, thereby collecting fingerprint data corresponding to the second period of time.
  • This fingerprint data can be recorded as Second fingerprint data.
  • the method may include:
  • the second duration may be equal to the fingerprint recognition duration T 3 required for the recognition process of the first fingerprint image. That is, when the recognition result of the first fingerprint image is determined, the fingerprint data collection of the second duration can be completed.
  • the fingerprint data collected for the second period of time can be transmitted, and the second fingerprint image can be determined based on the fingerprint data collected for the second period of time, and then the second fingerprint image can be processed Recognition to determine the recognition result of the fingerprint under the screen.
  • the second fingerprint image is successfully recognized, corresponding functions such as unlocking, payment or login can be performed. If the second fingerprint image recognition fails, it can be determined that the recognition result of the under-screen fingerprint is failed, and the terminal will be unable to perform corresponding functions such as unlocking, payment, or login.
  • the first duration is recorded as T 1 .
  • the first duration T 1 can be equal to 1/2 of the target exposure duration T′ 1 .
  • the first duration T 1 is used to collect the first fingerprint data, and the first fingerprint data is used to determine the first fingerprint image.
  • the information processing duration is denoted as T 2 , and this information processing duration T 2 can be the same as the conventional processing duration T′ 2 .
  • the fingerprint recognition time can be recorded as T 3 , and the fingerprint recognition time T 3 can be equal to the target recognition time T′ 3 minus the optimization time T 4 of the DSP technology.
  • the second duration may be equal to the fingerprint identification duration T 3 , the second duration is used to collect the second fingerprint data, and the second fingerprint data is used to determine the second fingerprint image.
  • the quality level of the first fingerprint image is the first level, it means that the first fingerprint image corresponds to a good fingerprint.
  • the final recognition result of the off-screen fingerprint can be determined based on the second fingerprint image, where the fingerprint recognition duration of the second fingerprint image can also be equal to T 3 . That is, in this implementation, the longest process duration for a good fingerprint is T 1 +T 2 +T 3 +T 2 +T 3 , while in the related art, the longest process duration for a good fingerprint is 2(T′ 1 +T′ 2 +T′ 3 ), that is, the longest process time for good fingerprints in this implementation can be shortened than the time required by related technologies.
  • a fingerprint recognition process corresponding to the quality level is performed according to the quality level of the first fingerprint image.
  • a second duration of exposure can be performed at the same time, so that during the recognition process of the first fingerprint image, the fingerprint data of the second duration can be simultaneously collected to update the quality level of the first fingerprint image.
  • the recognition result of the under-screen fingerprint is determined based on the second fingerprint image.
  • an under-screen fingerprint recognition method is provided and applied to a terminal. Referring to FIG. 2 , in this method, after the exposure is continued for a first duration, the exposure may be continued for a third duration.
  • executing a fingerprint recognition process corresponding to the quality level may include:
  • the quality level of the first fingerprint image is not the first level, determine the quality level of the third fingerprint image; wherein the third fingerprint image is determined based on the fingerprint data collected during the first time period and the fingerprint data collected during the third time period. ;
  • step S410 after it is determined that the quality level of the first fingerprint image is not the first level, the fingerprint data collected in the third time period can be transmitted, and the fingerprint data collected in the third time period and the fingerprint data collected in the first time period can be transmitted. data, determine the third fingerprint image, and then determine the quality level of the third fingerprint image. For determining the quality level of the third fingerprint image, reference may be made to the method for determining the quality level of the first fingerprint image, which will not be described again.
  • step S420 third fingerprint images of different quality levels may correspond to different fingerprint recognition processes. After the quality level corresponding to the third fingerprint image is determined, the fingerprint recognition process corresponding to the quality level can be performed.
  • the quality level of the third fingerprint image is the quality level corresponding to a poor fingerprint
  • the fingerprint data collected this time can be considered to be a poor fingerprint
  • fingerprint recognition can be directly performed on the third fingerprint image. If the recognition is successful, the corresponding function can be executed.
  • the corresponding function can be unlocking, logging in or paying, etc., and there is no limit to this.
  • the identification method of the third fingerprint image may refer to the identification method of the first fingerprint image, which will not be described again.
  • the quality level of the third fingerprint image can be determined, and then a fingerprint recognition process corresponding to the quality level is performed based on the quality level of the third fingerprint image. To determine the fingerprint recognition results under the screen.
  • This method can further improve the entire fingerprint identification process and enhance the user experience.
  • an under-screen fingerprint recognition method is provided and applied to a terminal.
  • a fingerprint recognition process corresponding to the quality level is performed, which may include:
  • the fingerprint quality corresponding to the second level is smaller than the fingerprint quality corresponding to the first level.
  • the first level corresponds to the fingerprint quality of good fingerprints
  • the second level corresponds to the fingerprint quality of poor fingerprints.
  • the method for determining the quality level of the third fingerprint image may refer to the method for determining the quality level of the first fingerprint image, which will not be described again.
  • the identification method for the third fingerprint image may be referred to the identification method for the first fingerprint image, which will not be described again.
  • step S520 if it is determined that the third fingerprint image recognition is successful, it can be directly determined that the recognition result of the under-screen fingerprint is successful.
  • the terminal can then perform corresponding functions such as unlocking, logging in or paying.
  • the mobile phone When the user unlocks the mobile phone, after the mobile phone detects the fingerprint recognition operation under the screen, it can light up the light spot and continue to expose it for a first time period T 1 , so that the optical fingerprint sensor of the mobile phone collects the first fingerprint data. Moreover, after the first period of continuous exposure, the exposure can be continued for a third period of time, so that the optical fingerprint sensor of the mobile phone collects the third fingerprint data.
  • the optical fingerprint sensor collects the first fingerprint data
  • it can be transmitted to the processor of the mobile phone, and the processor of the mobile phone can determine the first fingerprint image based on the above fingerprint data. From the completion of the first fingerprint data collection to the determination of the first fingerprint image by the processor, this period of time can be recorded as the information processing time T 2 , and this information processing time T 2 can be the same as the target processing time T′ 2 . It should be noted that the third duration may be equal to the information processing duration T 2 .
  • the processor After the processor determines the first fingerprint image, it can determine the quality level of the first fingerprint image. If it is determined that the quality level of the first fingerprint image is not the first level, the optical fingerprint sensor can transmit the third fingerprint data to the processor. At this point, the processor has obtained the first fingerprint data and the third fingerprint data, and then determines the third fingerprint image based on the third fingerprint data and the first fingerprint data.
  • the time period from the completion of the collection of the third fingerprint data to the determination of the third fingerprint image by the processor may be the same as the above information processing time period T 2 .
  • the processor determines the third fingerprint image, it can determine the quality level of the third fingerprint image. If it is determined that the quality level of the third fingerprint image is the second level, it can be explained that the fingerprint used for fingerprint identification this time is a poor fingerprint. Fingerprint recognition can be performed on the third fingerprint image based on DSP technology. If the fingerprint recognition is confirmed to be successful, the phone can be unlocked. The time required for fingerprint recognition can be recorded as the fingerprint recognition time T 3 .
  • the time required for the entire fingerprint identification process is T 1 +T 2 +T 2 +T 3 , which is the fastest process time for differential fingerprints.
  • the first duration T 1 may be equal to 1/2 of the target exposure duration T′ 1
  • the fingerprint recognition duration T 3 may be equal to the target recognition duration T′ 3 minus the optimized duration T 4 of the DSP technology. That is, the fastest process time required for poor fingerprints in this implementation can be shortened compared to the fastest process time required for poor fingerprints in related technologies.
  • the target exposure duration T′ 1 and the optimization duration T 4 are generally much longer than the conventional processing duration T′ 2 . That is, compared to related technologies, the method of the present disclosure still requires shorter time for the overall identification process of poor fingerprints.
  • the entire fingerprint recognition process can be further improved and the user experience can be further improved.
  • the fingerprint recognition experience of poor fingerprints can be further improved.
  • an under-screen fingerprint recognition method is provided and applied to a terminal. Referring to FIG. 2 , in this method, during the process of identifying the third fingerprint image, the exposure is continued for a fourth duration.
  • the light spot can be lit and exposed for a fourth duration to collect fingerprint data corresponding to the fourth duration.
  • This fingerprint data can be recorded as Fourth fingerprint data.
  • the fourth duration may be the same as the second duration.
  • the method may include:
  • the fourth duration may be equal to the fingerprint recognition duration required for the recognition process of the third fingerprint image. That is, when the recognition result of the third fingerprint image is determined, the fourth duration of fingerprint data collection can be completed.
  • the fingerprint recognition duration of the third fingerprint image may be the same as the fingerprint recognition duration of the first fingerprint image.
  • the fingerprint data collected for the fourth period of time can be transmitted, and the fourth fingerprint image can be determined based on the fingerprint data collected for the fourth period of time, and then the fourth fingerprint image can be Perform recognition to determine the recognition result of the fingerprint under the screen.
  • the fourth fingerprint image is successfully recognized, corresponding functions such as unlocking, payment or login can be performed. If the fourth fingerprint image recognition fails, it can be determined that the recognition result of the under-screen fingerprint is failed, and the terminal will be unable to perform corresponding functions such as unlocking, payment, or login.
  • the first duration is recorded as T 1 .
  • the first duration T 1 can be equal to 1/2 of the target exposure duration T′ 1 .
  • the first duration T 1 is used to collect the first fingerprint data, and the first fingerprint data is used to determine the first fingerprint image.
  • the information processing time of the first fingerprint data, the third fingerprint data and the fourth fingerprint data may be the same, denoted as T 2 , and the information processing time T 2 may be the same as the target processing time T′ 2 .
  • the fingerprint recognition duration of the first fingerprint image, the third fingerprint image and the fourth fingerprint image may be the same, denoted as T 3 .
  • the fingerprint recognition duration T 3 may be equal to the target recognition duration T′ 3 minus the optimization duration of the DSP technology T 4 .
  • the third duration may be equal to the information processing duration T 2 .
  • the fourth duration may be equal to the fingerprint recognition duration T 3 , the fourth duration is used to collect the fourth fingerprint data, and the fourth fingerprint data is used to determine the fourth fingerprint image.
  • the quality level of the first fingerprint image is not the first level, it means that the fingerprint identified this time is not a good fingerprint. Then continue to determine the quality level of the third fingerprint image.
  • the quality level of the third fingerprint image is determined to be the second level, it means that the fingerprint identified this time is a poor fingerprint. Then fingerprint recognition can be performed on the third fingerprint image.
  • the final under-screen fingerprint recognition result can be determined based on the fourth fingerprint image.
  • the longest process duration for differential fingerprints is T 1 +3*T 2 +2*T 3
  • the longest process duration for differential fingerprints is 2(T′ 1 +T′ 2 +T′ 3 ), that is, the longest process time for good fingerprints in this implementation can be shortened than the time required by related technologies.
  • a fingerprint recognition process corresponding to the quality level is performed according to the quality level of the third fingerprint image.
  • a fourth duration of exposure can be performed at the same time, so that during the recognition process of the third fingerprint image, the fourth duration of fingerprint data can be simultaneously collected to update Quickly determine the fourth fingerprint image.
  • the recognition result of the under-screen fingerprint is determined based on the fourth fingerprint image.
  • an under-screen fingerprint recognition method is provided and applied to a terminal. Referring to Figure 2, in this method, after the exposure is continued for a third duration, the exposure may be continued for a fifth duration.
  • executing a fingerprint recognition process corresponding to the quality level may include:
  • the recognition result of the under-screen fingerprint is determined based on the fifth fingerprint image.
  • the fingerprint quality corresponding to the third level is lower than the fingerprint quality corresponding to the second level.
  • the second level corresponds to poor fingerprints
  • the third level corresponds to extremely poor fingerprints.
  • the fifth fingerprint image is determined based on the fingerprint data collected during the first time period, the fingerprint data collected during the third time period, and the fingerprint data collected during the fifth time period.
  • the exposure can be continued for a fifth duration.
  • the fifth fingerprint image is determined based on the first fingerprint data collected in the first time period, the third fingerprint data collected in the third time period, and the fifth fingerprint data collected in the fifth time period.
  • the terminal can transmit the fingerprint data collected in the fifth time period, and based on the fingerprint data collected in the fifth time period, and the fingerprint data collected in the first time period.
  • the data and the fingerprint data collected for the third period of time are used to determine the fifth fingerprint image, and then fingerprint recognition is performed on the fifth fingerprint image.
  • the terminal can perform corresponding unlocking, login or payment functions. If the fifth fingerprint image recognition fails, the terminal can end the off-screen fingerprint recognition process without performing unlocking, login or payment functions.
  • the mobile phone When the user unlocks the mobile phone, after the mobile phone detects the fingerprint recognition operation under the screen, it can light up the light spot and continue to expose it for a first time period T 1 , so that the optical fingerprint sensor of the mobile phone collects the first fingerprint data. Moreover, after the first period of continuous exposure, the exposure can be continued for a third period of time, so that the optical fingerprint sensor of the mobile phone collects the third fingerprint data. Moreover, after the third period of continuous exposure, the fifth period of exposure can be continued, so that the optical fingerprint sensor of the mobile phone collects the fifth fingerprint data.
  • the optical fingerprint sensor collects the first fingerprint data
  • it can be transmitted to the processor of the mobile phone, and the processor of the mobile phone can determine the first fingerprint image based on the above fingerprint data. From the completion of the first fingerprint data collection to the determination of the first fingerprint image by the processor, this period of time can be recorded as the information processing time T 2 , and this information processing time T 2 can be the same as the target processing time T′ 2 . It should be noted that the third duration may be equal to the information processing duration T 2 .
  • the processor After the processor determines the first fingerprint image, it can determine the quality level of the first fingerprint image. If it is determined that the quality level of the first fingerprint image is not the first level, the optical fingerprint sensor can transmit the third fingerprint data to the processor. At this point, the processor has obtained the first fingerprint data and the third fingerprint data, and then determines the third fingerprint image based on the third fingerprint data and the first fingerprint data.
  • the time period from the completion of the collection of the third fingerprint data to the determination of the third fingerprint image by the processor may be the same as the above information processing time period T 2 .
  • the processor After the processor determines the third fingerprint image, it can determine the quality level of the third fingerprint image. If the quality level of the third fingerprint image is determined to be the third level, it means that the fingerprint used for fingerprint identification this time is an extremely poor fingerprint.
  • the optical fingerprint sensor can transmit the fifth fingerprint data to the processor. At this point, the processor has obtained the first fingerprint data, the third fingerprint data and the fifth fingerprint data, and then determines the fifth fingerprint image based on the fifth fingerprint data, the third fingerprint data and the first fingerprint data.
  • the length of time from the completion of the collection of the fifth fingerprint data to the determination of the fifth fingerprint image by the processor may be the same as the above-mentioned information processing time T 2 .
  • the processor After the processor determines the fifth fingerprint image, it can perform fingerprint recognition on the fifth fingerprint image based on DSP technology. If the fingerprint recognition is confirmed to be successful, the phone can be unlocked. The time required for fingerprint recognition can be recorded as the fingerprint recognition time T 3 . If fingerprint recognition fails, the phone does not need to be unlocked.
  • the time required for the entire fingerprint identification process is T 1 +3*T 2 +T 3 , which is the process time for extremely poor fingerprints.
  • the first duration T 1 may be equal to 1/2 of the target exposure duration T′ 1
  • the fingerprint recognition duration T 3 may be equal to the target recognition duration T′ 3 minus the optimized duration T 4 of the DSP technology. That is, the fastest process time required by this implementation method for poor fingerprints can be shortened compared to the slowest process time required by related technologies for extremely poor fingerprints.
  • the entire fingerprint recognition process can be further improved and the user experience can be further improved.
  • the fingerprint recognition experience of extremely poor fingerprints can be further improved.
  • an under-screen fingerprint recognition device is provided and applied to a terminal.
  • the device is used to implement the above-mentioned under-screen fingerprint recognition method.
  • the device may include an exposure module 101, a judgment module 102 and an identification module 103. In the process of implementing the above method, the device
  • the exposure module 101 is configured to detect the off-screen fingerprint recognition operation and continue to expose for a first duration; wherein the first duration is less than the target exposure duration;
  • the judgment module 102 is configured to judge the quality level of the first fingerprint image; wherein the first fingerprint image is determined based on the fingerprint data collected for the first time period;
  • the recognition module 103 is configured to, according to the quality level of the first fingerprint image, perform a fingerprint recognition process corresponding to the quality level.
  • an under-screen fingerprint recognition device is provided and applied to a terminal.
  • the identification module 103 is configured as:
  • the recognition result of the under-screen fingerprint is successful, and the corresponding application is executed based on the recognition result of the under-screen fingerprint.
  • an under-screen fingerprint recognition device is provided and applied to a terminal. Referring to Figure 3, in this device,
  • the exposure module 101 is configured to continue to expose for a second duration during the process of identifying the first fingerprint image
  • the recognition module 103 is configured to, after the recognition of the first fingerprint image, if the recognition of the first fingerprint image fails, determine the recognition result of the under-screen fingerprint based on the second fingerprint image; wherein the second fingerprint image is based on the second fingerprint image. The duration of fingerprint data collection is determined.
  • an under-screen fingerprint recognition device is provided and applied to a terminal.
  • the device may include a transmission module 104 and a determination module 105 .
  • the transmission module 104 is configured to, after failing to recognize the first fingerprint image, transmit the fingerprint data collected for the second duration;
  • the determination module 105 is configured to determine the second fingerprint image based on the fingerprint data collected for the second time period.
  • an under-screen fingerprint recognition device is provided and applied to a terminal. Referring to Figure 3, in this device,
  • the exposure module 101 is configured to continue the exposure for a third duration after continuing the exposure for the first duration;
  • the judgment module 102 is configured to, if it is determined that the quality level of the first fingerprint image is not the first level, then judge the quality level of the third fingerprint image; wherein the third fingerprint image is based on the fingerprint data collected in the first time period and the third time period. The collected fingerprint data is confirmed;
  • the identified module 103 is configured to, according to the quality level of the third fingerprint image, perform a fingerprint recognition process corresponding to the quality level.
  • an under-screen fingerprint recognition device is provided and applied to a terminal.
  • the device may include a transmission module 104 and a determination module 105 .
  • the transmission module 104 is configured to, after determining that the quality level of the first fingerprint image is not the first level, transmit the fingerprint data collected for the third period of time;
  • the determining module 105 is configured to determine the third fingerprint image based on the fingerprint data collected during the first time period and the fingerprint data collected during the third time period.
  • an under-screen fingerprint recognition device is provided and applied to a terminal.
  • the identification module 103 is configured as:
  • the third fingerprint image is identified; wherein the quality of the fingerprint corresponding to the second level is smaller than the quality of the fingerprint corresponding to the first level;
  • the recognition result of the under-screen fingerprint is determined to be successful.
  • an under-screen fingerprint recognition device is provided and applied to a terminal. Referring to Figure 3, in this device,
  • the exposure module 101 is configured to, during the process of identifying the third fingerprint image, continue to expose for a fourth duration;
  • the recognition module 103 is configured to, if the recognition of the third fingerprint image fails, determine the recognition result of the under-screen fingerprint based on the fourth fingerprint image; wherein the fourth fingerprint image is determined based on the fingerprint data collected for the fourth time period.
  • an under-screen fingerprint recognition device is provided and applied to a terminal.
  • the device may include a transmission module 104 and a determination module 105 .
  • the transmission module 104 is configured to, after failing to recognize the third fingerprint image, transmit the fingerprint data collected for the fourth duration;
  • the determining module 105 is configured to determine a fourth fingerprint image based on the fingerprint data collected for a fourth period of time.
  • an under-screen fingerprint recognition device is provided and applied to a terminal. Referring to Figure 3, in this device,
  • the exposure module 101 is configured to continue the exposure for a fifth time after continuing the exposure for a third time;
  • the recognition module 103 is configured to, if it is determined that the quality level of the third fingerprint image is the third level, determine the recognition result of the under-screen fingerprint based on the fifth fingerprint image; wherein the fingerprint quality corresponding to the third level is smaller than that corresponding to the second level. Fingerprint quality, the fifth fingerprint image is determined based on the fingerprint data collected in the first period, the fingerprint data collected in the third period, and the fingerprint data collected in the fifth period.
  • an under-screen fingerprint recognition device is provided and applied to a terminal.
  • the device may include a transmission module 104 and a determination module 105 .
  • the transmission module 104 is configured to, after determining that the quality level of the third fingerprint image is the third level, transmit the fingerprint data collected for the fifth time period;
  • the determination module 105 is configured to determine the fifth fingerprint image based on the fingerprint data collected during the first time period, the fingerprint data collected during the third time period, and the fingerprint data collected during the fifth time period.
  • a terminal is provided.
  • the terminal can be a mobile phone, computer, digital broadcast terminal, messaging device, game console, tablet device, medical device, fitness device, personal digital assistant, etc.
  • the terminal 800 may include one or more of the following components: a processing component 802 , a memory 804 , a power component 806 , a multimedia component 808 , an audio component 810 , an input/output (I/O) interface 812 , and a sensor component. 814, and communications component 816.
  • a processing component 802 a memory 804 , a power component 806 , a multimedia component 808 , an audio component 810 , an input/output (I/O) interface 812 , and a sensor component. 814, and communications component 816.
  • Processing component 802 generally controls the overall operations of terminal 800, such as operations associated with display, phone calls, data communications, camera operations, and recording operations.
  • the processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the above method.
  • processing component 802 may include one or more modules that facilitate interaction between processing component 802 and other components.
  • processing component 802 may include a multimedia module to facilitate interaction between multimedia component 808 and processing component 802.
  • Memory 804 is configured to store various types of data to support operations at device 800 . Examples of such data include instructions for any application or method operating on the terminal 800, contact data, phonebook data, messages, pictures, videos, etc.
  • Memory 804 may be implemented by any type of volatile or non-volatile storage device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EEPROM), Programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read-only memory
  • EEPROM erasable programmable read-only memory
  • EPROM Programmable read-only memory
  • PROM programmable read-only memory
  • ROM read-only memory
  • magnetic memory flash memory, magnetic or optical disk.
  • Power supply component 806 provides power to various components of terminal 800.
  • Power component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to terminal 800.
  • Multimedia component 808 includes a screen that provides an output interface between the terminal 800 and the user.
  • the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user.
  • the touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide action.
  • multimedia component 808 includes a front-facing camera and/or a rear-facing camera.
  • the front camera and/or the rear camera may receive external multimedia data.
  • Each front-facing camera and rear-facing camera can be a fixed optical lens system or have a focal length and optical zoom capabilities.
  • Audio component 810 is configured to output and/or input audio signals.
  • audio component 810 includes a microphone (MIC) configured to receive external audio signals when terminal 800 is in operating modes, such as call mode, recording mode, and voice recognition mode. The received audio signal may be further stored in memory 804 or sent via communication component 816 .
  • audio component 810 also includes a speaker for outputting audio signals.
  • the I/O interface 812 provides an interface between the processing component 802 and a peripheral interface module, which may be a keyboard, a click wheel, a button, etc. These buttons may include, but are not limited to: Home button, Volume buttons, Start button, and Lock button.
  • Sensor component 814 includes one or more sensors that provide various aspects of status assessment for terminal 800 .
  • the sensor component 814 can detect the open/closed state of the device 800, the relative positioning of components, such as the display and keypad of the terminal 800, and the sensor component 814 can also detect the position change of the terminal 800 or a component of the terminal 800. , the presence or absence of user contact with the terminal 800 , the orientation or acceleration/deceleration of the terminal 800 and the temperature change of the terminal 800 .
  • Sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact.
  • Sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications.
  • the sensor component 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
  • the communication component 816 is configured to facilitate wired or wireless communication between the terminal 800 and other devices.
  • the terminal 800 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof.
  • the communication component 816 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel.
  • the communications component 816 also includes a near field communications (NFC) module to facilitate short-range communications.
  • NFC near field communications
  • the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.
  • RFID radio frequency identification
  • IrDA infrared data association
  • UWB ultra-wideband
  • Bluetooth Bluetooth
  • the terminal 800 may be configured by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable Gate array (FPGA), controller, microcontroller, microprocessor or other electronic components are implemented for executing the above-mentioned under-screen fingerprint recognition method.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGA field programmable Gate array
  • controller microcontroller, microprocessor or other electronic components are implemented for executing the above-mentioned under-screen fingerprint recognition method.
  • a non-transitory computer-readable storage medium including instructions such as a memory 804 including instructions, which can be executed by the processor 820 of the terminal 800 to complete the above method is also provided.
  • the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.
  • a non-transitory computer-readable storage medium which when instructions in the storage medium are executed by a processor of a terminal, enables the terminal to perform the above-mentioned off-screen fingerprint recognition method.
  • the first exposure time is first, and based on the quality level of the first fingerprint image obtained for the first time period, the corresponding quality level is performed.
  • the fingerprint recognition process is used to determine the recognition results of the fingerprint under the screen, improve the entire fingerprint recognition process, and enhance the user experience. In particular, it can greatly improve the fingerprint recognition experience of fingerprint images with better fingerprint quality.

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Abstract

La présente divulgation concerne un procédé de reconnaissance d'empreintes digitales intra-écran, un appareil, un terminal et un support de stockage, le procédé de reconnaissance d'empreintes digitales intra-écran comprenant les étapes qui consistent : lors de la détection d'une opération de reconnaissance d'empreintes digitales intra-écran, à effectuer en continu une exposition pendant une première durée, la première durée étant plus courte qu'une durée d'exposition cible ; à déterminer le niveau de qualité d'une première image d'empreinte digitale, la première image d'empreinte digitale étant déterminée sur la base de données d'empreinte digitale collectées pendant la première durée ; et, en fonction du niveau de qualité de la première image d'empreinte digitale, à exécuter un processus de reconnaissance d'empreintes digitales correspondant au niveau de qualité. Dans la présente invention, lorsqu'une reconnaissance d'empreintes digitales intra-écran est effectuée, une exposition est d'abord effectuée pendant la première durée et ensuite, en fonction du niveau de qualité de la première image d'empreinte digitale obtenue pour la première durée, le processus de reconnaissance d'empreintes digitales correspondant au niveau de qualité est exécuté, de façon à déterminer un résultat de reconnaissance d'une empreinte digitale intra-écran, ce qui permet d'améliorer l'ensemble du processus de reconnaissance d'empreintes digitales ainsi que l'expérience d'utilisation d'un utilisateur, et d'améliorer particulièrement l'expérience de reconnaissance d'empreintes digitales d'une image d'empreinte digitale ayant une bonne qualité d'empreinte digitale dans une large mesure.
PCT/CN2022/099500 2022-06-17 2022-06-17 Procédé de reconnaissance d'empreintes digitales intra-écran, appareil, terminal et support de stockage WO2023240608A1 (fr)

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PCT/CN2022/099500 WO2023240608A1 (fr) 2022-06-17 2022-06-17 Procédé de reconnaissance d'empreintes digitales intra-écran, appareil, terminal et support de stockage
CN202280004408.9A CN117616476A (zh) 2022-06-17 2022-06-17 一种屏下指纹识别方法、装置、终端及存储介质

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Citations (4)

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Publication number Priority date Publication date Assignee Title
CN109885998A (zh) * 2019-01-24 2019-06-14 Oppo广东移动通信有限公司 指纹解锁方法及相关设备
US20190197287A1 (en) * 2017-12-21 2019-06-27 Lg Display Co., Ltd. Fingerprint Recognition Device and Display Device and Mobile Terminal Using Fingerprint Recognition Device
US20210150178A1 (en) * 2019-05-22 2021-05-20 Shenzhen GOODIX Technology Co., Ltd. Method for biometric identification, fingerprint identification apparatus and electronic device
CN112949600A (zh) * 2021-04-07 2021-06-11 Oppo广东移动通信有限公司 屏下指纹采集方法、装置、终端及存储介质

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190197287A1 (en) * 2017-12-21 2019-06-27 Lg Display Co., Ltd. Fingerprint Recognition Device and Display Device and Mobile Terminal Using Fingerprint Recognition Device
CN109885998A (zh) * 2019-01-24 2019-06-14 Oppo广东移动通信有限公司 指纹解锁方法及相关设备
US20210150178A1 (en) * 2019-05-22 2021-05-20 Shenzhen GOODIX Technology Co., Ltd. Method for biometric identification, fingerprint identification apparatus and electronic device
CN112949600A (zh) * 2021-04-07 2021-06-11 Oppo广东移动通信有限公司 屏下指纹采集方法、装置、终端及存储介质

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