WO2022156555A1 - Procédé de réglage de luminosité d'écran, appareil et dispositif terminal - Google Patents

Procédé de réglage de luminosité d'écran, appareil et dispositif terminal Download PDF

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Publication number
WO2022156555A1
WO2022156555A1 PCT/CN2022/071099 CN2022071099W WO2022156555A1 WO 2022156555 A1 WO2022156555 A1 WO 2022156555A1 CN 2022071099 W CN2022071099 W CN 2022071099W WO 2022156555 A1 WO2022156555 A1 WO 2022156555A1
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WIPO (PCT)
Prior art keywords
brightness
fingerprint
terminal device
spot
finger
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PCT/CN2022/071099
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English (en)
Chinese (zh)
Inventor
蔡奇
黄宗兴
彭旭
邓凯锋
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华为技术有限公司
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Publication of WO2022156555A1 publication Critical patent/WO2022156555A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor

Definitions

  • the embodiments of the present application relate to the technical field of intelligent terminals, and in particular, to a method, an apparatus, and a terminal device for adjusting screen brightness.
  • under-screen optical fingerprint solution In response to market demand, displays in terminal devices (such as mobile phones or tablet computers) are gradually developing towards full-screen displays, pursuing higher and higher screen-to-body ratios, resulting in the emergence of under-screen optical fingerprint solutions.
  • the light with fingerprint information can penetrate the screen to reach the surface of the optical fingerprint sensor (sensor) for imaging, and combined with software algorithms, the fingerprint recognition function can be realized.
  • the touch function of the screen is used to confirm whether the pressing position of the finger and the pressing area of the fingerprint meet the requirements of fingerprint-triggered image capture. If the pressed position is consistent with the structure of the fingerprint, and the pressed area of the fingerprint exceeds the proportion of the projected spot of the fingerprint (for example, more than 50%), the operating system of the terminal device will issue a fingerprint capture notification, and the light spot in the corresponding area of the screen will be bright to a fixed brightness (for example, : 600nit).
  • the fingerprint sensor receives the image collection notification, according to the set fixed image collection parameters (for example, the exposure time is 50-60ms), the corresponding fingerprint image is obtained after the exposure is completed. open. Then, based on the acquired fingerprint image, subsequent matching identification is performed.
  • Embodiments of the present application provide a method, apparatus, and terminal device for adjusting screen brightness, and embodiments of the present application also provide a computer-readable storage medium, so as to reduce the brightness in dim scenes without affecting the quality of fingerprint images.
  • the brightness of the fingerprint spot can improve the glare problem of the spot.
  • an embodiment of the present application provides a method for adjusting screen brightness, including: after a terminal device detects a pressing operation of a user's finger on the display screen of the terminal device, determining whether the pressing operation of the finger and the pressing area of the fingerprint satisfy The trigger condition for fingerprint collection; if it is satisfied, obtain the brightness of the environment where the terminal device is currently located; in response to determining that the brightness of the environment where the terminal device is currently located is the first brightness, determine that the brightness of the fingerprint spot is the first spot brightness, and determine The exposure duration of the fingerprint spot is the first duration; in response to determining that the brightness of the environment where the terminal device is currently located is the second brightness, the brightness of the fingerprint spot is determined to be the second spot brightness, and the exposure duration of the fingerprint spot is determined to be the second duration ; wherein, the brightness of the first light spot is different from the brightness of the second light spot, and the first duration is different from the second duration; after the exposure duration ends, the fingerprint image of the user's finger collected by the fingerprint image sensor is
  • the pressing operation of the finger and the pressing area of the fingerprint to satisfy the trigger condition for fingerprint acquisition may be: the pressing position of the finger matches the position of the fingerprint light spot, and the area of the pressing area of the fingerprint is the same as that of the fingerprint.
  • the ratio of the areas of the light spots is greater than or equal to a predetermined threshold.
  • the first spot brightness is less than or equal to the second spot brightness
  • the first duration is greater than or equal to the second duration
  • a notification of image acquisition is sent to the fingerprint image sensor.
  • the terminal device obtains the brightness of the environment in which the terminal device is currently located through an ambient light sensor, and determines the brightness of the fingerprint spot and the exposure duration of the fingerprint spot according to the brightness.
  • the current spot of under-screen optical fingerprints in dark environments is effectively improved. dazzling question.
  • an embodiment of the present application provides a method for collecting an under-screen optical fingerprint, including: after a terminal device detects a pressing operation of a user's finger on the display screen of the terminal device, determining the pressing operation of the finger and the pressing of the fingerprint Whether the area satisfies the trigger condition for fingerprint acquisition; if so, obtain the brightness of the current environment where the terminal device is located; determine the brightness of the fingerprint spot according to the brightness of the current environment where the terminal device is located; and select the image sensor corresponding to the above brightness a unit array, to determine the photoelectric conversion efficiency of the hardware unit corresponding to the image sensing unit array, the effective light-receiving area of the pixel and the exposure duration; after the exposure duration ends, obtain the fingerprint image of the user's finger collected by the fingerprint image sensor; wherein, the above The fingerprint image is collected by the fingerprint image sensor through the image sensing unit array corresponding to the above-mentioned brightness; the above-mentioned fingerprint image is matched and identified.
  • the above-mentioned pressing operation of the finger and the pressing area of the fingerprint to satisfy the triggering condition for fingerprint acquisition may be: the pressing position of the finger matches the position of the fingerprint spot, and the area of the pressing area of the fingerprint is the same as the above-mentioned The ratio of the areas of the fingerprint spots is greater than or equal to a predetermined threshold.
  • the brightness of the fingerprint spot is determined according to the brightness of the environment where the terminal device is currently located; and an image sensing unit array corresponding to the above-mentioned brightness is selected to determine the photoelectricity of the hardware unit corresponding to the above-mentioned image sensing unit array.
  • the conversion efficiency, the effective light-receiving area of the pixel, and the exposure duration may be: in response to determining that the brightness of the environment where the terminal device is currently located is the first brightness, determining that the brightness of the fingerprint spot is the first spot brightness, and determining the brightness corresponding to the first brightness.
  • the image sensing unit array is the first image sensing unit array, and the photoelectric conversion efficiency of the hardware unit corresponding to the first image sensing unit array, the effective light-receiving area of the pixel, and the exposure duration are determined as the first photoelectric conversion efficiency, the first effective photoelectric conversion efficiency, and the first effective photoelectric conversion efficiency.
  • determining that the brightness of the environment where the terminal device is currently located is the second brightness
  • determining that the brightness of the fingerprint spot is the second spot brightness
  • determining that the image sensing unit array corresponding to the second brightness is the second image sensing unit array
  • determining The photoelectric conversion efficiency of the hardware unit corresponding to the second image sensing unit array, the effective light-receiving area of the pixel, and the exposure duration are the second photoelectric conversion efficiency, the second effective light-receiving area, and the second duration, respectively;
  • the first light spot brightness is different from the second light spot brightness
  • the first photoelectric conversion efficiency is different from the second photoelectric conversion efficiency
  • the first effective light receiving area is different from the second effective light receiving area
  • the first duration is different from the second duration
  • the first brightness when the first brightness is less than the second brightness, the brightness of the first spot is less than or equal to the brightness of the second spot, the first photoelectric conversion efficiency is greater than or equal to the second photoelectric conversion efficiency, and the first effective light receiving The area is greater than or equal to the second effective light-receiving area, and the first duration is greater than or equal to the second duration.
  • a notification of image acquisition is sent to the fingerprint image sensor. , to instruct the above-mentioned fingerprint image sensor to collect the fingerprint image of the user's finger.
  • the terminal device obtains the brightness of the environment in which the terminal device is currently located through an ambient light sensor, and determines the brightness of the fingerprint spot according to the brightness; and selects an image sensing unit array corresponding to the brightness to determine the image transmission.
  • the sensing unit array corresponds to the photoelectric conversion efficiency of the hardware unit, the effective light-receiving area of the pixel and the exposure time.
  • the fingerprint image sensor selects image sensing unit arrays with different sensitivities to collect fingerprint images, which effectively improves the current screen. The problem of dazzling light spots in the dark environment of optical fingerprints.
  • an embodiment of the present application provides an under-screen optical fingerprint collection device, the device is included in a terminal device, and the device has a function of implementing the behavior of the terminal device in the first aspect and possible implementations of the first aspect.
  • the functions can be implemented by hardware, or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules or units corresponding to the above functions. For example, a receiving module or unit, a processing module or unit, a transmitting module or unit, and the like.
  • an embodiment of the present application provides a device for collecting an under-screen optical fingerprint, the device is included in a terminal device, and the device has a function of implementing the behavior of the terminal device in the second aspect and possible implementations of the second aspect.
  • the functions can be implemented by hardware, or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules or units corresponding to the above functions. For example, a receiving module or unit, a processing module or unit, a transmitting module or unit, and the like.
  • an embodiment of the present application provides a terminal device, including:
  • the above-mentioned terminal equipment is caused to perform the following steps: after detecting the pressing operation of the user's finger on the display screen of the terminal equipment, determine whether the pressing operation of the finger and the pressing area of the fingerprint satisfy the triggering condition of fingerprint sampling; If satisfied, then obtain the brightness of the environment where the terminal device is currently located; in response to determining that the brightness of the environment where the terminal device is currently located is the first brightness, determine the brightness of the fingerprint spot as the first spot brightness, and determine the exposure duration of the fingerprint spot as a first duration; in response to determining that the brightness of the environment where the terminal device is currently located is the second brightness, determining the brightness of the fingerprint spot as the second spot brightness, and determining the exposure duration of the fingerprint spot as the second duration; wherein, the first spot brightness Different
  • the above-mentioned pressing operation of the finger and the pressing area of the fingerprint to satisfy the triggering condition for fingerprint acquisition may be: the pressing position of the finger matches the position of the fingerprint spot, and the area of the pressing area of the fingerprint is the same as the above-mentioned The ratio of the areas of the fingerprint spots is greater than or equal to a predetermined threshold.
  • the first spot brightness is less than or equal to the second spot brightness
  • the first duration is greater than or equal to the second duration
  • the following steps are also performed: If the pressing area satisfies the trigger condition for fingerprint capture, a capture notification is sent to the fingerprint image sensor to instruct the fingerprint image sensor to capture the fingerprint image of the user's finger.
  • an embodiment of the present application provides a terminal device, including: one or more processors; a memory; a plurality of application programs; and one or more computer programs, wherein the one or more computer programs are stored in the above In the memory, the above-mentioned one or more computer programs include instructions, and when the above-mentioned instructions are executed by the terminal device, the terminal device is caused to perform the following steps: after detecting the pressing operation of the user's finger on the display screen of the terminal device, determine the pressing operation of the above-mentioned finger And whether the pressing area of the fingerprint satisfies the triggering condition of fingerprint sampling; if so, obtain the brightness of the environment where the terminal device is currently located; determine the brightness of the fingerprint spot according to the brightness of the environment where the terminal device is currently located; For the corresponding image sensing unit array, determine the photoelectric conversion efficiency of the hardware unit corresponding to the image sensing unit array, the effective light-receiving area of the pixel, and the exposure duration; after the exposure duration ends,
  • the above-mentioned pressing operation of the finger and the pressing area of the fingerprint satisfy the triggering condition for fingerprint capture may be: the pressing position of the finger matches the position of the fingerprint spot, and the area of the pressing area of the fingerprint is the same as that of the fingerprint.
  • the ratio of the areas of the fingerprint light spots is greater than or equal to a predetermined threshold.
  • the terminal device when the above instruction is executed by the terminal device, the terminal device is made to determine the brightness of the fingerprint spot according to the brightness of the environment where the terminal device is currently located; and select an image sensing unit corresponding to the above brightness.
  • the steps of determining the photoelectric conversion efficiency of the hardware unit corresponding to the image sensing unit array, the effective light-receiving area of the pixel and the exposure duration may be: in response to determining that the brightness of the environment where the terminal device is currently located is the first brightness, determining the fingerprint spot.
  • the brightness of the first light spot is the brightness of the first light spot
  • the image sensing unit array corresponding to the first brightness is determined as the first image sensing unit array
  • the photoelectric conversion efficiency of the hardware unit corresponding to the first image sensing unit array and the effective reception rate of the pixel are determined.
  • the light area and the exposure duration are respectively the first photoelectric conversion efficiency, the first effective light-receiving area, and the first duration; in response to determining that the brightness of the environment where the terminal device is currently located is the second brightness, the brightness of the fingerprint spot is determined to be the second spot brightness , and determine that the image sensing unit array corresponding to the above-mentioned second brightness is the second image sensing unit array, and determine the photoelectric conversion efficiency of the hardware unit corresponding to the second image sensing unit array, the effective light-receiving area of the pixel and the exposure time respectively are the second photoelectric conversion efficiency, the second effective light-receiving area, and the second duration; wherein, the brightness of the first light spot is different from the brightness of the second light spot, the first photoelectric conversion efficiency is different from the second photoelectric conversion efficiency, and the first effective light-receiving area is Different from the second effective light-receiving area, the first duration is different from the second duration.
  • the first brightness when the first brightness is less than the second brightness, the brightness of the first spot is less than or equal to the brightness of the second spot, the first photoelectric conversion efficiency is greater than or equal to the second photoelectric conversion efficiency, and the first effective light receiving The area is greater than or equal to the second effective light-receiving area, and the first duration is greater than or equal to the second duration.
  • the following steps are also performed: if the pressing operation of the finger and the fingerprint If the pressed area meets the trigger condition for fingerprint capture, a capture notification is sent to the fingerprint image sensor to instruct the fingerprint image sensor to capture the fingerprint image of the user's finger.
  • an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program runs on a computer, causes the computer to execute the method provided in the first aspect.
  • an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when it runs on a computer, causes the computer to execute the method provided in the second aspect.
  • an embodiment of the present application provides a computer program for executing the method provided in the first aspect when the computer program is executed by a computer.
  • an embodiment of the present application provides a computer program for executing the method provided in the second aspect when the computer program is executed by a computer.
  • the programs of the ninth aspect and the tenth aspect may be stored in whole or in part on a storage medium packaged with the processor, or may be stored in part or in part in a storage medium not packaged with the processor on the memory.
  • FIG. 1 is a schematic structural diagram of a typical under-screen optical fingerprint imaging system provided in the related art
  • Fig. 2 is the graph that the image quality of the optical fingerprint under the screen provided by the prior art changes with the screen brightness
  • FIG. 3 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of an under-screen optical fingerprint imaging provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of the relationship between the image quality of the under-screen optical fingerprint, exposure time and screen brightness according to an embodiment of the present application
  • FIG. 6 is a flowchart of a method for adjusting screen brightness provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a pixel distribution of a conventional fingerprint image sensor
  • FIG. 8 is a schematic diagram of a mosaic of pixels with different sensitivity provided by an embodiment of the present application.
  • FIG. 9 is a flowchart of a method for adjusting screen brightness provided by another embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a terminal device provided by another embodiment of the present application.
  • FIG. 1 is a schematic structural diagram of a typical under-screen optical fingerprint imaging system provided in the related art.
  • the fingerprint collection process of the system is as follows: when starting to collect the fingerprint image, the human finger 1 is placed above the organic light-emitting diode (organic light-emitting diode, OLED) display screen 2; the OLED display screen 2 emits light as a light source to generate emission light 4; After light 4 propagates upward and reaches the surface of the finger, it will be reflected to form reflected light 5; the difference in contact formed by different areas of human fingers (such as “valley” and "ridge") when they are attached to the OLED display screen 2 will cause reflected light in different areas.
  • OLED organic light-emitting diode
  • Fig. 1, 6 is the disturbance light of the external environment.
  • the process of capturing an optical fingerprint under the screen may be as follows: after the display screen of the terminal device detects the pressing action of the user's finger, the touch function of the screen is used to confirm whether the pressing position of the finger and the pressing area of the fingerprint are not. Meet the needs of fingerprint-triggered image capture. If the pressed position is consistent with the structure of the fingerprint, and the pressed area of the fingerprint exceeds the proportion of the projected spot of the fingerprint (for example, more than 50%), the operating system of the terminal device will issue a fingerprint capture notification, and the light spot in the corresponding area of the screen will be bright to a fixed brightness (for example, : 600nit).
  • a fixed brightness for example, : 600nit
  • the fingerprint sensor After the fingerprint sensor receives the image collection notification, according to the set fixed image collection parameters (for example, the exposure time is 50-60ms), the corresponding fingerprint image is obtained after the exposure is completed. open. Then, based on the acquired fingerprint image, subsequent matching identification is performed.
  • the set fixed image collection parameters for example, the exposure time is 50-60ms
  • FIG. 2 is a graph showing the change of the image quality of the optical fingerprint under the screen with the brightness of the screen provided by the related art.
  • the image quality signal amount or signal noise ratio (SNR)
  • SNR signal noise ratio
  • terminal devices on the market generally require that the screen brightness of the fingerprint unlocking process be above 600 nit (the brightness is higher than the display brightness of the normal screen, which is 400 nit).
  • the brightness of the fingerprint unlocking spot of the optical fingerprint under the screen is generally required to be consistent in each usage scenario.
  • the human eye's response to brightness is not linear. For example, in a dim room, people see bright candlelight, but the same candlelight is placed in the noon sunlight, and people can't even see the flames, which means that the human eye
  • the response to changes in brightness diminishes as the brightness increases.
  • under-screen optical fingerprints users will inevitably have the problem of spot light leakage due to incomplete pressing during the process of using under-screen optical fingerprints.
  • users have different degrees of sensitivity to the brightness of the screen in different environmental states, especially in dim scenes (for example: evening and/or movie theaters, etc.), the human eye is more sensitive to light, and the use of off-screen fingerprints in such scenes, The light leakage of the bright spot on the screen will cause the user to feel dazzling, which directly affects the user's unlocking experience in this type of scenario, thereby limiting the wide application of optical fingerprint recognition technology in mobile terminal devices such as mobile phones.
  • an embodiment of the present application provides a method for adjusting screen brightness.
  • the ambient light sensor is used to determine the type of environment in which the terminal device is located, and the fingerprint unlocking parameter configuration and The process is judged to realize automatic adjustment of screen brightness without affecting the unlocking performance, and improve the user's experience of dazzling light leakage during the process of unlocking with the optical fingerprint under the screen.
  • the method for adjusting screen brightness provided by the embodiments of the present application may be applied to terminal devices, where the above-mentioned terminal devices may be smartphones, tablet computers, wearable devices, vehicle-mounted devices, augmented reality (AR)/virtual reality (virtual reality) reality, VR) devices, notebook computers, ultra-mobile personal computers (ultra-mobile personal computers, UMPCs), netbooks, or personal digital assistants (personal digital assistants, PDAs) and other devices; the embodiments of this application do not make any assumptions about the specific types of terminal devices. limit.
  • AR augmented reality
  • VR virtual reality
  • UMPCs ultra-mobile personal computers
  • PDAs personal digital assistants
  • FIG. 3 is a schematic structural diagram of a terminal device provided by an embodiment of the present application, and FIG. 3 is described by taking the terminal device being a smart phone as an example.
  • the terminal device 100 may include a processor 110 , an external memory interface 120 , an internal memory 121 , a universal serial bus (USB) interface 130 , a charging management module 140 , a power management module 141 , and a battery 142 , Antenna 1, Antenna 2, Mobile Communication Module 150, Wireless Communication Module 160, Audio Module 170, Speaker 170A, Receiver 170B, Microphone 170C, Headphone Interface 170D, Sensor Module 180, Key 190, Motor 191, Indicator 192, Camera 193 , a display screen 194, and a subscriber identification module (subscriber identification module, SIM) card interface 195 and the like.
  • SIM subscriber identification module
  • the sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, and ambient light. Sensor 180L, bone conduction sensor 180M, etc.
  • the terminal device 100 may include more or less components than those shown in the drawings, or combine some components, or separate some components, or arrange different components.
  • the illustrated components may be implemented in hardware, software, or a combination of software and hardware.
  • the processor 110 may include one or more processing units, for example, the processor 110 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), controller, video codec, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural-network processing unit (neural-network processing unit, NPU), etc. Wherein, different processing units may be independent devices, or may be integrated in one or more processors.
  • application processor application processor, AP
  • modem processor graphics processor
  • ISP image signal processor
  • controller video codec
  • digital signal processor digital signal processor
  • baseband processor baseband processor
  • neural-network processing unit neural-network processing unit
  • the controller can generate an operation control signal according to the instruction operation code and timing signal, and complete the control of fetching and executing instructions.
  • a memory may also be provided in the processor 110 for storing instructions and data.
  • the memory in processor 110 is cache memory. This memory may hold instructions or data that have just been used or recycled by the processor 110 . If the processor 110 needs to use the instruction or data again, it can be called directly from the memory. Repeated accesses are avoided and the latency of the processor 110 is reduced, thereby increasing the efficiency of the system.
  • the processor 110 may include one or more interfaces.
  • the interface may include an integrated circuit (inter-integrated circuit, I2C) interface, an integrated circuit built-in audio (inter-integrated circuit sound, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous transceiver (universal asynchronous transmitter) receiver/transmitter, UART) interface, mobile industry processor interface (MIPI), general-purpose input/output (GPIO) interface, subscriber identity module (SIM) interface, and / or universal serial bus (universal serial bus, USB) interface, etc.
  • I2C integrated circuit
  • I2S integrated circuit built-in audio
  • PCM pulse code modulation
  • PCM pulse code modulation
  • UART universal asynchronous transceiver
  • MIPI mobile industry processor interface
  • GPIO general-purpose input/output
  • SIM subscriber identity module
  • USB universal serial bus
  • the I2C interface is a bidirectional synchronous serial bus that includes a serial data line (SDA) and a serial clock line (DCL).
  • the processor 110 may contain multiple sets of I2C buses.
  • the processor 110 can be respectively coupled to the touch sensor 180K, the charger, the flash, the camera 193 and the like through different I2C bus interfaces.
  • the processor 110 may couple the touch sensor 180K through the I2C interface, so that the processor 110 and the touch sensor 180K communicate with each other through the I2C bus interface, so as to realize the touch function of the terminal device 100 .
  • the I2S interface can be used for audio communication.
  • the processor 110 may contain multiple sets of I2S buses.
  • the processor 110 may be coupled with the audio module 170 through an I2S bus to implement communication between the processor 110 and the audio module 170 .
  • the audio module 170 can transmit audio signals to the wireless communication module 160 through the I2S interface, so as to realize the function of answering calls through a Bluetooth headset.
  • the PCM interface can also be used for audio communications, sampling, quantizing and encoding analog signals.
  • the audio module 170 and the wireless communication module 160 may be coupled through a PCM bus interface.
  • the audio module 170 can also transmit audio signals to the wireless communication module 160 through the PCM interface, so as to realize the function of answering calls through the Bluetooth headset. Both the I2S interface and the PCM interface can be used for audio communication.
  • the UART interface is a universal serial data bus used for asynchronous communication.
  • the bus may be a bidirectional communication bus. It converts the data to be transmitted between serial communication and parallel communication.
  • a UART interface is typically used to connect the processor 110 with the wireless communication module 160 .
  • the processor 110 communicates with the Bluetooth module in the wireless communication module 160 through the UART interface to implement the Bluetooth function.
  • the audio module 170 can transmit audio signals to the wireless communication module 160 through the UART interface, so as to realize the function of playing music through the Bluetooth headset.
  • the MIPI interface can be used to connect the processor 110 with peripheral devices such as the display screen 194 and the camera 193 .
  • MIPI interfaces include camera serial interface (CSI), display serial interface (DSI), etc.
  • the processor 110 communicates with the camera 193 through the CSI interface, so as to realize the shooting function of the terminal device 100 .
  • the processor 110 communicates with the display screen 194 through the DSI interface to implement the display function of the terminal device 100 .
  • the GPIO interface can be configured by software.
  • the GPIO interface can be configured as a control signal or as a data signal.
  • the GPIO interface may be used to connect the processor 110 with the camera 193, the display screen 194, the wireless communication module 160, the audio module 170, the sensor module 180, and the like.
  • the GPIO interface can also be configured as I2C interface, I2S interface, UART interface, MIPI interface, etc.
  • the USB interface 130 is an interface that conforms to the USB standard specification, and may specifically be a Mini USB interface, a Micro USB interface, a USB Type C interface, and the like.
  • the USB interface 130 can be used to connect a charger to charge the terminal device 100, and can also be used to transmit data between the terminal device 100 and peripheral devices. It can also be used to connect headphones to play audio through the headphones.
  • the interface can also be used to connect other electronic devices, such as AR devices.
  • the interface connection relationship between the modules illustrated in the embodiment of the present invention is only a schematic illustration, and does not constitute a structural limitation of the terminal device 100 .
  • the terminal device 100 may also adopt different interface connection manners in the foregoing embodiments, or a combination of multiple interface connection manners.
  • the charging management module 140 is used to receive charging input from the charger.
  • the charger may be a wireless charger or a wired charger.
  • the charging management module 140 may receive charging input from the wired charger through the USB interface 130.
  • the charging management module 140 may receive wireless charging input through the wireless charging coil of the terminal device 100 . While the charging management module 140 charges the battery 142 , the terminal device 100 can also be powered by the power management module 141 .
  • the power management module 141 is used for connecting the battery 142 , the charging management module 140 and the processor 110 .
  • the power management module 141 receives input from the battery 142 and/or the charging management module 140, and supplies power to the processor 110, the internal memory 121, the display screen 194, the camera 193, and the wireless communication module 160.
  • the power management module 141 can also be used to monitor parameters such as battery capacity, battery cycle times, battery health status (leakage, impedance).
  • the power management module 141 may also be provided in the processor 110 .
  • the power management module 141 and the charging management module 140 may also be provided in the same device.
  • the wireless communication function of the terminal device 100 may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, the modulation and demodulation processor, the baseband processor, and the like.
  • Antenna 1 and Antenna 2 are used to transmit and receive electromagnetic wave signals.
  • Each antenna in terminal device 100 may be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization.
  • the antenna 1 can be multiplexed as a diversity antenna of the wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.
  • the mobile communication module 150 may provide a wireless communication solution including 2G/3G/4G/5G, etc. applied on the terminal device 100 .
  • the mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (LNA) and the like.
  • the mobile communication module 150 can receive electromagnetic waves from the antenna 1, filter and amplify the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation.
  • the mobile communication module 150 can also amplify the signal modulated by the modulation and demodulation processor, and then turn it into an electromagnetic wave for radiation through the antenna 1 .
  • at least part of the functional modules of the mobile communication module 150 may be provided in the processor 110 .
  • at least part of the functional modules of the mobile communication module 150 may be provided in the same device as at least part of the modules of the processor 110 .
  • the modem processor may include a modulator and a demodulator.
  • the modulator is used to modulate the low frequency baseband signal to be sent into a medium and high frequency signal.
  • the demodulator is used to demodulate the received electromagnetic wave signal into a low frequency baseband signal. Then the demodulator transmits the demodulated low-frequency baseband signal to the baseband processor for processing.
  • the low frequency baseband signal is processed by the baseband processor and passed to the application processor.
  • the application processor outputs sound signals through audio devices (not limited to the speaker 170A, the receiver 170B, etc.), or displays images or videos through the display screen 194 .
  • the modem processor may be a stand-alone device.
  • the modem processor may be independent of the processor 110, and may be provided in the same device as the mobile communication module 150 or other functional modules.
  • the wireless communication module 160 can provide applications on the terminal device 100 including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), bluetooth (BT), global navigation satellites Wireless communication solutions such as global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), and infrared technology (IR).
  • WLAN wireless local area networks
  • BT Bluetooth
  • GNSS global navigation satellite system
  • FM frequency modulation
  • NFC near field communication
  • IR infrared technology
  • the wireless communication module 160 may be one or more devices integrating at least one communication processing module.
  • the wireless communication module 160 receives electromagnetic waves via the antenna 2 , frequency modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 110 .
  • the wireless communication module 160 can also receive the signal to be sent from the processor 110 , perform frequency modulation on it, amplify it, and convert it into electromagnetic waves for radiation through the antenna 2 .
  • the antenna 1 of the terminal device 100 is coupled with the mobile communication module 150, and the antenna 2 is coupled with the wireless communication module 160, so that the terminal device 100 can communicate with the network and other devices through wireless communication technology.
  • the wireless communication technology may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), broadband Code Division Multiple Access (WCDMA), Time Division Code Division Multiple Access (TD-SCDMA), Long Term Evolution (LTE), BT, GNSS, WLAN, NFC , FM, and/or IR technology, etc.
  • the GNSS may include global positioning system (global positioning system, GPS), global navigation satellite system (global navigation satellite system, GLONASS), Beidou navigation satellite system (beidou navigation satellite system, BDS), quasi-zenith satellite system (quasi -zenith satellite system, QZSS) and/or satellite based augmentation systems (SBAS).
  • global positioning system global positioning system, GPS
  • global navigation satellite system global navigation satellite system, GLONASS
  • Beidou navigation satellite system beidou navigation satellite system, BDS
  • quasi-zenith satellite system quadsi -zenith satellite system, QZSS
  • SBAS satellite based augmentation systems
  • the terminal device 100 implements a display function through a GPU, a display screen 194, an application processor, and the like.
  • the GPU is a microprocessor for image processing, and is connected to the display screen 194 and the application processor.
  • the GPU is used to perform mathematical and geometric calculations for graphics rendering.
  • Processor 110 may include one or more GPUs that execute program instructions to generate or alter display information.
  • Display screen 194 is used to display images, videos, and the like.
  • Display screen 194 includes a display panel.
  • the display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (active-matrix organic light).
  • LED diode AMOLED
  • flexible light-emitting diode flexible light-emitting diode (flex light-emitting diode, FLED), Miniled, MicroLed, Micro-oLed, quantum dot light-emitting diode (quantum dot light emitting diodes, QLED) and so on.
  • the terminal device 100 may include one or N display screens 194 , where N is a positive integer greater than one.
  • the terminal device 100 can realize the shooting function through the ISP, the camera 193, the video codec, the GPU, the display screen 194 and the application processor.
  • the ISP is used to process the data fed back by the camera 193 .
  • the shutter is opened, the light is transmitted to the camera photosensitive element through the lens, the light signal is converted into an electrical signal, and the camera photosensitive element transmits the electrical signal to the ISP for processing, and converts it into an image visible to the naked eye.
  • ISP can also perform algorithm optimization on image noise, brightness, and skin tone.
  • ISP can also optimize the exposure, color temperature and other parameters of the shooting scene.
  • the ISP may be provided in the camera 193 .
  • Camera 193 is used to capture still images or video.
  • the object is projected through the lens to generate an optical image onto the photosensitive element.
  • the photosensitive element may be a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor.
  • CMOS complementary metal-oxide-semiconductor
  • the photosensitive element converts the optical signal into an electrical signal, and then transmits the electrical signal to the ISP to convert it into a digital image signal.
  • the ISP outputs the digital image signal to the DSP for processing.
  • DSP converts digital image signals into standard RGB, YUV and other formats of image signals.
  • the terminal device 100 may include 1 or N cameras 193 , where N is a positive integer greater than 1.
  • a digital signal processor is used to process digital signals, in addition to processing digital image signals, it can also process other digital signals. For example, when the terminal device 100 selects a frequency point, the digital signal processor is used to perform Fourier transform on the frequency point energy and the like.
  • Video codecs are used to compress or decompress digital video.
  • the terminal device 100 may support one or more video codecs.
  • the terminal device 100 can play or record videos in various encoding formats, for example, moving picture experts group (moving picture experts group, MPEG) 1, MPEG2, MPEG3, MPEG4 and so on.
  • MPEG moving picture experts group
  • the NPU is a neural-network (NN) computing processor.
  • NN neural-network
  • Applications such as intelligent cognition of the terminal device 100 can be implemented through the NPU, such as image recognition, face recognition, speech recognition, text understanding, and the like.
  • the external memory interface 120 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the terminal device 100 .
  • the external memory card communicates with the processor 110 through the external memory interface 120 to realize the data storage function. For example to save files like music, video etc in external memory card.
  • Internal memory 121 may be used to store computer executable program code, which includes instructions.
  • the internal memory 121 may include a storage program area and a storage data area.
  • the storage program area can store an operating system, an application program required for at least one function (such as a sound playback function, an image playback function, etc.), and the like.
  • the storage data area may store data (such as audio data, phone book, etc.) created during the use of the terminal device 100 and the like.
  • the internal memory 121 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, universal flash storage (UFS), and the like.
  • the processor 110 executes various functional applications and data processing of the terminal device 100 by executing instructions stored in the internal memory 121 and/or instructions stored in a memory provided in the processor.
  • the terminal device 100 may implement audio functions through an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, an application processor, and the like. Such as music playback, recording, etc.
  • the audio module 170 is used for converting digital audio information into analog audio signal output, and also for converting analog audio input into digital audio signal. Audio module 170 may also be used to encode and decode audio signals. In some embodiments, the audio module 170 may be provided in the processor 110 , or some functional modules of the audio module 170 may be provided in the processor 110 .
  • Speaker 170A also referred to as a "speaker" is used to convert audio electrical signals into sound signals.
  • the terminal device 100 can listen to music through the speaker 170A, or listen to a hands-free call.
  • the receiver 170B also referred to as "earpiece" is used to convert audio electrical signals into sound signals.
  • the terminal device 100 answers a call or a voice message, the voice can be answered by placing the receiver 170B close to the human ear.
  • the microphone 170C also called “microphone” or “microphone” is used to convert sound signals into electrical signals.
  • the user can make a sound by approaching the microphone 170C through a human mouth, and input the sound signal into the microphone 170C.
  • the terminal device 100 may be provided with at least one microphone 170C.
  • the terminal device 100 may be provided with two microphones 170C, which may implement a noise reduction function in addition to collecting sound signals.
  • the terminal device 100 may further be provided with three, four or more microphones 170C to collect sound signals, reduce noise, identify sound sources, and implement directional recording functions.
  • the earphone jack 170D is used to connect wired earphones.
  • the earphone interface 170D may be the USB interface 130, or may be a 3.5mm open mobile terminal platform (OMTP) standard interface, a cellular telecommunications industry association of the USA (CTIA) standard interface.
  • OMTP open mobile terminal platform
  • CTIA cellular telecommunications industry association of the USA
  • the pressure sensor 180A is used to sense pressure signals, and can convert the pressure signals into electrical signals.
  • the pressure sensor 180A may be provided on the display screen 194 .
  • the capacitive pressure sensor may be comprised of at least two parallel plates of conductive material. When a force is applied to the pressure sensor 180A, the capacitance between the electrodes changes.
  • the terminal device 100 determines the intensity of the pressure according to the change in capacitance. When a touch operation acts on the display screen 194, the terminal device 100 detects the intensity of the touch operation according to the pressure sensor 180A.
  • the terminal device 100 may also calculate the touched position according to the detection signal of the pressure sensor 180A.
  • touch operations acting on the same touch position but with different touch operation intensities may correspond to different operation instructions. For example, when a touch operation whose intensity is less than the first pressure threshold acts on the short message application icon, the instruction for viewing the short message is executed. When a touch operation with a touch operation intensity greater than or equal to the first pressure threshold acts on the short message application icon, the instruction to create a new short message is executed.
  • the gyro sensor 180B may be used to determine the motion attitude of the terminal device 100 .
  • the angular velocity of the end device 100 about three axes ie, the x, y and z axes
  • the gyro sensor 180B can be used for image stabilization.
  • the gyro sensor 180B detects the shaking angle of the terminal device 100, calculates the distance to be compensated by the lens module according to the angle, and allows the lens to offset the shaking of the terminal device 100 through reverse motion to achieve anti-shake.
  • the gyro sensor 180B can also be used for navigation and somatosensory game scenarios.
  • the air pressure sensor 180C is used to measure air pressure.
  • the terminal device 100 calculates the altitude through the air pressure value measured by the air pressure sensor 180C to assist in positioning and navigation.
  • the magnetic sensor 180D includes a Hall sensor.
  • the terminal device 100 can detect the opening and closing of the flip holster using the magnetic sensor 180D.
  • the terminal device 100 can detect the opening and closing of the flip according to the magnetic sensor 180D. Further, according to the detected opening and closing state of the leather case or the opening and closing state of the flip cover, characteristics such as automatic unlocking of the flip cover are set.
  • the acceleration sensor 180E can detect the magnitude of the acceleration of the terminal device 100 in various directions (generally three axes).
  • the magnitude and direction of gravity can be detected when the terminal device 100 is stationary. It can also be used to identify the posture of electronic devices, and can be used in applications such as horizontal and vertical screen switching, pedometers, etc.
  • the terminal device 100 can measure the distance through infrared or laser. In some embodiments, when shooting a scene, the terminal device 100 can use the distance sensor 180F to measure the distance to achieve fast focusing.
  • Proximity light sensor 180G may include, for example, light emitting diodes (LEDs) and light detectors, such as photodiodes.
  • the light emitting diodes may be infrared light emitting diodes.
  • the terminal device 100 emits infrared light to the outside through the light emitting diode.
  • the terminal device 100 detects infrared reflected light from nearby objects using a photodiode. When sufficient reflected light is detected, it can be determined that there is an object near the terminal device 100 . When insufficient reflected light is detected, the terminal device 100 may determine that there is no object near the terminal device 100 .
  • the terminal device 100 can use the proximity light sensor 180G to detect that the user holds the terminal device 100 close to the ear to talk, so as to automatically turn off the screen to save power.
  • Proximity light sensor 180G can also be used in holster mode, pocket mode automatically unlocks and locks the screen.
  • the ambient light sensor 180L is used to sense ambient light brightness.
  • the terminal device 100 can adaptively adjust the brightness of the display screen 194 according to the perceived ambient light brightness.
  • the ambient light sensor 180L can also be used to automatically adjust the white balance when taking pictures.
  • the ambient light sensor 180L can also cooperate with the proximity light sensor 180G to detect whether the terminal device 100 is in a pocket, so as to prevent accidental touch.
  • the fingerprint image sensor 180H is used to collect fingerprints.
  • the terminal device 100 can use the collected fingerprint characteristics to realize fingerprint unlocking, accessing application locks, taking photos with fingerprints, answering incoming calls with fingerprints, and the like.
  • the temperature sensor 180J is used to detect the temperature.
  • the terminal device 100 uses the temperature detected by the temperature sensor 180J to execute the temperature processing strategy. For example, when the temperature reported by the temperature sensor 180J exceeds a threshold value, the terminal device 100 reduces the performance of the processor located near the temperature sensor 180J, so as to reduce power consumption and implement thermal protection.
  • the terminal device 100 when the temperature is lower than another threshold, the terminal device 100 heats the battery 142 to avoid abnormal shutdown of the terminal device 100 caused by the low temperature.
  • the terminal device 100 boosts the output voltage of the battery 142 to avoid abnormal shutdown caused by low temperature.
  • Touch sensor 180K also called “touch device”.
  • the touch sensor 180K may be disposed on the display screen 194 , and the touch sensor 180K and the display screen 194 form a touch screen, also called a “touch screen”.
  • the touch sensor 180K is used to detect a touch operation on or near it.
  • the touch sensor can pass the detected touch operation to the application processor to determine the type of touch event.
  • Visual output related to touch operations may be provided through display screen 194 .
  • the touch sensor 180K may also be disposed on the surface of the terminal device 100 , which is different from the position where the display screen 194 is located.
  • the bone conduction sensor 180M can acquire vibration signals.
  • the bone conduction sensor 180M can acquire the vibration signal of the vibrating bone mass of the human voice.
  • the bone conduction sensor 180M can also contact the pulse of the human body and receive the blood pressure beating signal.
  • the bone conduction sensor 180M can also be disposed in the earphone, combined with the bone conduction earphone.
  • the audio module 170 can analyze the voice signal based on the vibration signal of the vocal vibration bone block obtained by the bone conduction sensor 180M, so as to realize the voice function.
  • the application processor can analyze the heart rate information based on the blood pressure beat signal obtained by the bone conduction sensor 180M, and realize the function of heart rate detection.
  • the keys 190 include a power-on key, a volume key, and the like. Keys 190 may be mechanical keys. It can also be a touch key.
  • the terminal device 100 may receive key input and generate key signal input related to user settings and function control of the terminal device 100 .
  • Motor 191 can generate vibrating cues.
  • the motor 191 can be used for vibrating alerts for incoming calls, and can also be used for touch vibration feedback.
  • touch operations acting on different applications can correspond to different vibration feedback effects.
  • the motor 191 can also correspond to different vibration feedback effects for touch operations on different areas of the display screen 194 .
  • Different application scenarios for example: time reminder, receiving information, alarm clock, games, etc.
  • the touch vibration feedback effect can also support customization.
  • the indicator 192 can be an indicator light, which can be used to indicate the charging state, the change of the power, and can also be used to indicate a message, a missed call, a notification, and the like.
  • the SIM card interface 195 is used to connect a SIM card.
  • the SIM card can be contacted and separated from the terminal device 100 by inserting into the SIM card interface 195 or pulling out from the SIM card interface 195 .
  • the terminal device 100 may support 1 or N SIM card interfaces, where N is a positive integer greater than 1.
  • the SIM card interface 195 can support Nano SIM card, Micro SIM card, SIM card and so on. Multiple cards can be inserted into the same SIM card interface 195 at the same time. The types of the plurality of cards may be the same or different.
  • the SIM card interface 195 can also be compatible with different types of SIM cards.
  • the SIM card interface 195 is also compatible with external memory cards.
  • the terminal device 100 interacts with the network through the SIM card to implement functions such as call and data communication.
  • the terminal device 100 adopts an eSIM, that is, an embedded SIM card.
  • the eSIM card can be embedded in the terminal device 100 and cannot be separated from the terminal device 100 .
  • FIG. 4 is a schematic diagram of under-screen optical fingerprint imaging according to an embodiment of the present application.
  • 41 is a human finger
  • 42 is an OLED display screen
  • the OLED display screen may be the display screen 194 of the terminal device 100 shown in FIG. 3 .
  • the ambient light sensor 47 in the terminal device is used to obtain the light intensity information of the current environment where the terminal device is located; the processor 48 determines, according to the light intensity information obtained by the ambient light sensor 47, whether the working environment of the fingerprint image sensor 43 is Dim, regular or bright light. According to the working environment in which the fingerprint image sensor 43 is located, the processor 48 selects different hardware and software parameter configurations (for example, different fingerprint light spot brightness, matching different exposure times or different sensitivity photosensitive units), so as to realize the operation under different ambient light conditions. Optimize the brightness of the fingerprint light spot under low light conditions (such as dim, normal or strong light), and improve the problem of light leakage and glare caused by incomplete pressing of the light spot during use.
  • different hardware and software parameter configurations for example, different fingerprint light spot brightness, matching different exposure times or different sensitivity photosensitive units
  • FIG. 5 is a schematic diagram of the relationship between image quality of an under-screen optical fingerprint, exposure time, and screen brightness according to an embodiment of the present application. It can be seen from Figure 5 that during the optical fingerprint imaging under the screen, under the premise of avoiding the overexposure of the fingerprint image sensor, extending the exposure time t of the fingerprint spot or increasing the brightness L of the fingerprint spot can improve the quality of the fingerprint image. Therefore, in order to obtain a stable and clear fingerprint image, when the screen brightness is reduced, the exposure time can be appropriately extended to ensure that the amount of signals obtained by the fingerprint image sensor remains unchanged and the quality of the fingerprint image is guaranteed.
  • FIG. 6 is a flowchart of a method for adjusting screen brightness provided by an embodiment of the present application. As shown in FIG. 6 , the above-mentioned method for adjusting screen brightness may include:
  • Step 601 after the terminal device 100 detects the pressing operation of the user's finger on the display screen 194 of the terminal device 100 , it determines whether the pressing operation of the finger and the pressing area of the fingerprint meet the triggering conditions for fingerprint capture.
  • the terminal device 100 can detect the pressing operation of the user's finger on the display screen 194 through the processor 110 and the pressure sensor 180A and/or the touch sensor 180K, and then determine whether the above-mentioned pressing operation of the finger and the pressing area of the fingerprint satisfy the fingerprint acquisition requirements. trigger condition.
  • Step 602 if satisfied, acquire the brightness of the environment where the terminal device 100 is currently located.
  • the above-mentioned pressing operation of the finger and the pressing area of the fingerprint meeting the triggering conditions for fingerprint capture may include: the pressing position of the finger matches the position of the fingerprint spot, and the ratio of the area of the pressing area of the fingerprint to the area of the fingerprint spot greater than or equal to a predetermined threshold.
  • the above-mentioned predetermined threshold may be set by itself during specific implementation according to system performance and/or implementation requirements, and this embodiment does not limit the size of the above-mentioned predetermined threshold.
  • the above-mentioned predetermined threshold may be 50%.
  • the processor 110 in the terminal device 100 may acquire the brightness of the environment where the terminal device 100 is currently located from the ambient light sensor 180L.
  • Step 603 in response to determining that the brightness of the environment where the terminal device 100 is currently located is the first brightness, determining that the brightness of the fingerprint spot is the first spot brightness, and determining that the exposure duration of the fingerprint spot is the first duration; in response to determining that the terminal device 100
  • the brightness of the current environment is the second brightness
  • the brightness of the fingerprint light spot is determined as the second light spot brightness
  • the exposure duration of the fingerprint light spot is determined as the second duration.
  • the brightness of the first light spot is different from the brightness of the second light spot, and the first duration is different from the second duration.
  • the first spot brightness is less than or equal to the second spot brightness
  • the first duration is greater than or equal to the second duration
  • the specific parameters of the brightness of the fingerprint light spot and the exposure time of the fingerprint light spot can be configured according to the above conditions and needs, but the exposure time should not be too long, because the exposure time is too long, it will affect the unlocking time, and then affect the user's smooth experience.
  • the value range of the exposure duration is 10-200ms
  • the value range of the brightness of the fingerprint spot is 100-1500nit.
  • the brightness of the environment where the terminal device 100 is currently located is divided into the following four levels:
  • B3 is normal: illuminance 100 ⁇ L ⁇ 10000lux;
  • the brightness of the fingerprint spot can be determined to be L1, and the corresponding exposure time is t1.
  • the value range of L1 can be 200 ⁇ 400nit, and the value range of exposure duration t1 can be 100 ⁇ 200ms;
  • the brightness of the fingerprint spot can be determined to be L2, and the corresponding exposure time is t2, where the value range of L2 can be 400-600nit, and the value range of the exposure duration t2 can be 50-100ms;
  • the brightness level of the environment is B3, for example, the ambient illuminance is 100 ⁇ L ⁇ 10000lux
  • the current environment brightness of the terminal device 100 is normal brightness, so it can be determined that the brightness of the fingerprint spot is the normal set value L3, and the corresponding The exposure duration is the normal set value t3, where the value range of L3 can be 600-1000nit, and the exposure duration t2 can be 20-80ms;
  • the brightness level of the environment is B4, for example, the environmental illumination is L>10000lux
  • the current environment where the terminal device 100 is located is an environment with strong light interference.
  • the brightness of the fingerprint spot can be determined to be L4.
  • the corresponding exposure duration is the normal set value t4, wherein the value range of L4 may be more than 600nit, and the value range of the exposure duration t2 may be 5-50ms.
  • Step 604 after the exposure time period ends, obtain the fingerprint image of the user's finger collected by the fingerprint image sensor 180H.
  • the processor 110 in the terminal device 100 can send the fingerprint image to the fingerprint image.
  • the sensor 180H sends an image capture notification to instruct the fingerprint image sensor 180H to capture the fingerprint image of the user's finger.
  • the fingerprint image sensor 180H may collect one or more fingerprint images as required, which is not limited in this embodiment.
  • Step 605 perform matching and identification on the above fingerprint image.
  • the terminal device 100 obtains the brightness of the current environment where the terminal device 100 is located through the ambient light sensor 180L, and determines the brightness of the fingerprint spot and the exposure duration of the fingerprint spot according to the brightness.
  • the current spot of under-screen optical fingerprints in dark environments is effectively improved. dazzling question.
  • FIG. 7 is a schematic diagram of the pixel distribution of the conventional fingerprint image sensor.
  • the embodiments of the present application may also design photosensitive units with different sensitivities in the hardware design of the 180H pixel of the fingerprint image sensor. Specifically, the amount of light signal obtained by different pixels within the same exposure time can be adjusted by adjusting the effective photosensitive area of different pixels, and the responsivity of the device can be determined by different semiconductor materials (for example: silicon-based or oxide semiconductor, etc.) Or doping process, etc. to achieve.
  • semiconductor materials for example: silicon-based or oxide semiconductor, etc.
  • FIG. 8 is a schematic diagram of splicing pixels with different sensitivities provided by an embodiment of the present application. As shown in FIG. 8 , the splicing designs A, B, and C of pixels with different sensitivities are shown in FIG. 8 .
  • pixel A can be normal sensitivity (pixel size 50-100um), and the anti-saturation ability is normal (for example: photoelectric conversion saturation electron number 5-10W);
  • pixel B can be medium sensitivity (pixel size 20-50um), anti-saturation ability General (for example: photoelectric conversion saturation electron number 2-5W);
  • pixel C can be high sensitivity (pixel size 1-20um), slightly poor anti-saturation ability (for example: photoelectric conversion saturation electron number 0.5-2W); can be selected according to needs 2 or more photosensitive units with different photosensitive sensitivities.
  • the use of high-sensitivity pixel types can obtain the same image quality with the same exposure time when the screen brightness is reduced.
  • the selection of pixel units with high anti-saturation ability can ensure that the fingerprint image is not exposed in the state of external strong light interference. .
  • FIG. 9 is a flowchart of a method for adjusting screen brightness provided by another embodiment of the present application.
  • hardware pixel units with different sensitivities can be selected according to the environment where the terminal device 100 is located to achieve the purpose of adjusting the brightness of the fingerprint spot. Either The quality of the fingerprint image is guaranteed without significantly affecting the unlocking time.
  • the flow chart of the above-mentioned method for adjusting screen brightness may include:
  • Step 901 after the terminal device 100 detects the pressing operation of the user's finger on the display screen 194 of the terminal device 100 , it determines whether the pressing operation of the finger and the pressing area of the fingerprint meet the triggering conditions for fingerprint capture.
  • the terminal device 100 can detect the pressing operation of the user's finger on the display screen 194 through the processor 110 and the pressure sensor 180A and/or the touch sensor 180K, and then determine whether the above-mentioned pressing operation of the finger and the pressing area of the fingerprint satisfy the fingerprint acquisition requirements. trigger condition.
  • Step 902 if satisfied, obtain the brightness of the environment where the terminal device 100 is currently located.
  • the above-mentioned pressing operation of the finger and the pressing area of the fingerprint meeting the triggering conditions for fingerprint capture may include: the pressing position of the finger matches the position of the fingerprint spot, and the ratio of the area of the pressing area of the fingerprint to the area of the fingerprint spot greater than or equal to a predetermined threshold.
  • the above-mentioned predetermined threshold may be set by itself during specific implementation according to system performance and/or implementation requirements, and this embodiment does not limit the size of the above-mentioned predetermined threshold.
  • the above-mentioned predetermined threshold may be 50%.
  • the processor 110 in the terminal device 100 obtains the fingerprint capture notification, it can obtain the brightness of the environment where the terminal device 100 is currently located from the ambient light sensor 180L.
  • Step 903 Determine the brightness of the fingerprint light spot according to the brightness of the current environment of the terminal device 100; Effective light-receiving area and exposure time.
  • the brightness of the fingerprint spot is determined according to the brightness of the environment where the terminal device 100 is currently located; and the image sensing unit array corresponding to the above-mentioned brightness is selected to determine the photoelectric conversion efficiency of the hardware unit corresponding to the above-mentioned image sensing unit array, the pixel's
  • the effective light-receiving area and exposure time can be:
  • the photoelectric conversion efficiency of the hardware unit corresponding to the first image sensing unit array, the effective light-receiving area of the pixel, and the exposure duration are the first photoelectric conversion efficiency, the first effective light-receiving area, and the first duration, respectively;
  • determining that the brightness of the environment where the terminal device 100 is currently located is the second brightness
  • determining that the brightness of the fingerprint spot is the second spot brightness
  • determining that the image sensing unit array corresponding to the second brightness is the second image sensing unit array
  • the first light spot brightness is different from the second light spot brightness
  • the first photoelectric conversion efficiency is different from the second photoelectric conversion efficiency
  • the first effective light receiving area is different from the second effective light receiving area
  • the first duration is different from the second duration
  • the first duration is greater than or equal to the second duration.
  • the value range of the brightness L of the fingerprint light spot is generally 100-1500nit; the value range of the exposure time is generally 10-200ms.
  • the brightness of the environment where the terminal device 100 is currently located can be divided into the following four levels:
  • B3 is normal: illuminance 100 ⁇ L ⁇ 10000lux;
  • the brightness level of the environment is B1
  • the ambient illuminance is L ⁇ 10lux
  • the brightness of the fingerprint spot can be determined to be L1
  • a high-sensitivity image sensor is selected.
  • the unit array is used for image capturing, the photoelectric conversion efficiency of the hardware unit corresponding to the image sensing unit array is Q1, the effective light-receiving area of the pixel is A1, and the corresponding exposure time is t1;
  • the brightness level of the environment is B2
  • the ambient illumination is 10 ⁇ L ⁇ 100lux
  • the brightness of the fingerprint spot can be determined as L2, and the image with medium and high sensitivity is selected.
  • the sensing unit array is used for image acquisition.
  • the photoelectric conversion efficiency of the hardware unit corresponding to the image sensing unit array is Q2, the effective light-receiving area of the pixel is A2, and the corresponding exposure time is t2;
  • the brightness level of the environment is B3, for example, the ambient illuminance is 100 ⁇ L ⁇ 10000lux, and the current environment brightness of the terminal device 100 is normal brightness, it can be determined that the brightness of the fingerprint spot is L3, and an image sensor with normal sensitivity is selected.
  • the unit array is used for image capturing, the photoelectric conversion efficiency of the hardware unit corresponding to the image sensing unit array is Q3, the effective light-receiving area of the pixel is A3, and the corresponding exposure time is t3;
  • the brightness level of the environment is B4, for example, the environmental illumination is L>10000lux
  • the current environment where the terminal device 100 is located is an environment with strong light interference.
  • the brightness of the fingerprint spot can be determined to be L4.
  • the image sensing unit array with normal sensitivity is used for image acquisition.
  • the photoelectric conversion efficiency of the hardware unit corresponding to the image sensing unit array is Q4, the effective light-receiving area of the pixel is A4, and the corresponding exposure time is t4.
  • the value of the brightness of the fingerprint spot is L1 ⁇ L2 ⁇ L3 ⁇ L4, the value of the corresponding exposure time is t4 ⁇ t3 ⁇ t2 ⁇ t1, and the value of the photoelectric conversion efficiency is Q4.
  • ⁇ Q3 ⁇ Q2 ⁇ Q1 the value of the effective light-receiving area A4 ⁇ A3 ⁇ A2 ⁇ A1.
  • Step 904 after the exposure period ends, obtain a fingerprint image of the user's finger collected by the fingerprint image sensor 180H; wherein the fingerprint image is collected by the fingerprint image sensor 180H through an image sensing unit array corresponding to the brightness.
  • a picture sampling notification is sent to the fingerprint image sensor to indicate the fingerprint image sensor.
  • the fingerprint image of the above-mentioned user's finger is collected.
  • the fingerprint image sensor 180H may collect one or more fingerprint images as required, which is not limited in this embodiment.
  • Step 905 perform matching and identification on the above fingerprint image.
  • the terminal device 100 obtains the brightness of the environment where the terminal device 100 is currently located through the ambient light sensor 180L, determines the brightness of the fingerprint spot according to the brightness; and selects an image sensing unit corresponding to the above brightness Array, and determine the photoelectric conversion efficiency of the hardware unit corresponding to the image sensing unit array, the effective light-receiving area of the pixel, and the exposure time.
  • the fingerprint image sensor 180H selects image sensing unit arrays with different sensitivities to collect fingerprint images, effectively improving the current situation. The problem that the optical fingerprints under the screen are dazzling in the dark environment.
  • the terminal device includes corresponding hardware and/or software modules for executing each function.
  • the algorithm steps of each example described in conjunction with the embodiments disclosed in this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functionality for each particular application in conjunction with the embodiments, but such implementations should not be considered beyond the scope of this application.
  • the terminal device may be divided into functional modules according to the foregoing method embodiments.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware. It should be noted that the division of modules in this embodiment is schematic, and is only a logical function division, and other division methods may be used in actual implementation.
  • FIG. 10 is a schematic structural diagram of a terminal device according to another embodiment of the present application.
  • FIG. 10 shows a possible composition of the terminal device 1000 involved in the above embodiment.
  • the terminal device 1000 may include: a receiving unit 1001, a processing unit 1002 and a sending unit 1003;
  • the receiving unit 1001 may be configured to support the terminal device 1000 to perform other processes of the technical solutions described in the embodiments of this application;
  • the processing unit 1002 may be configured to support the terminal device 1000 to perform steps 601 to 605, and steps 901 to 905, etc., and/or other processes for the technical solutions described in the embodiments of this application;
  • the sending unit 1003 may be configured to support the terminal device 1000 to perform other processes of the technical solutions described in the embodiments of this application.
  • the terminal device 1000 provided in this embodiment is used to execute the above method for adjusting the screen brightness, so the same effect as the above method can be achieved.
  • the terminal device 1000 may correspond to the terminal device 100 shown in FIG. 1 .
  • the functions of the receiving unit 1001 and the sending unit 1003 may be determined by the processor 110 , the antenna 1 and the mobile communication module 100 in the terminal device 100 shown in FIG. 1 , and/or by the processor 110 , the antenna 2 and the wireless communication module 160 Implementation; the functions of the processing unit 1002 may be implemented by the processor 110 , the ambient light sensor 180L, the fingerprint image sensor 180H, the pressure sensor 180A and the touch sensor 180K in the terminal device 100 shown in FIG. 1 .
  • the terminal device 1000 may include a processing module, a storage module, and a communication module.
  • the processing module may be used to control and manage the actions of the terminal device 1000, for example, may be used to support the terminal device 1000 to perform the steps performed by the receiving unit 1001, the processing unit 1002 and the sending unit 1003.
  • the storage module may be used to support the terminal device 1000 to store program codes, data, and the like.
  • the communication module can be used to support the communication between the terminal device 1000 and other devices.
  • a processing module may be a processor or controller, which may implement or execute the various exemplary logical blocks, modules, and circuits described in connection with the present disclosure.
  • the processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, and the like.
  • the storage module may be a memory.
  • the communication module may specifically be a device that interacts with other electronic devices, such as a radio frequency circuit, a Bluetooth chip, and/or a Wi-Fi chip.
  • the terminal device 1000 involved in this embodiment may be a device having the structure shown in FIG. 3 .
  • Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when it runs on a computer, the computer causes the computer to execute the programs provided by the embodiments shown in FIGS. 5 to 9 of the present application. method.
  • An embodiment of the present application further provides a computer program product, the computer program product includes a computer program, which, when run on a computer, enables the computer to execute the methods provided by the embodiments shown in FIGS. 5 to 9 of the present application.
  • “at least one” refers to one or more, and “multiple” refers to two or more.
  • “And/or”, which describes the association relationship of the associated objects means that there can be three kinds of relationships, for example, A and/or B, which can indicate the existence of A alone, the existence of A and B at the same time, and the existence of B alone. where A and B can be singular or plural.
  • the character “/” generally indicates that the associated objects are an “or” relationship.
  • “At least one of the following” and similar expressions refer to any combination of these items, including any combination of single or plural items.
  • At least one of a, b, and c may represent: a, b, c, a and b, a and c, b and c or a and b and c, where a, b, c may be single, or Can be multiple.
  • any function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

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  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Collating Specific Patterns (AREA)
  • Image Input (AREA)

Abstract

Les modes de réalisation de la présente demande concernent un procédé de réglage de luminosité d'écran, un appareil et un dispositif terminal. Dans le procédé de réglage de luminosité d'écran, après qu'un dispositif terminal a détecté une opération de pression du doigt d'un utilisateur sur un écran d'affichage du dispositif terminal, on détermine si l'opération de pression du doigt et la zone de pression de l'empreinte digitale satisfont une condition de déclenchement d'acquisition d'image d'empreinte digitale ; si tel est le cas, une notification d'acquisition d'image d'empreinte digitale est acquise, et la luminosité de l'environnement où le dispositif terminal se trouve actuellement est acquise ; ensuite, dans la mesure où les performances de déverrouillage d'une empreinte digitale optique sous-écran n'est pas affectée, la luminosité d'un point lumineux d'empreinte digitale et la durée d'exposition du point lumineux d'empreinte digitale sont déterminées en fonction de la luminosité de l'environnement où le dispositif terminal se trouve actuellement, ou un réseau d'unités de détection d'image ayant différentes sensibilités est sélectionné pour acquérir une image d'empreinte digitale, ce qui permet de résoudre efficacement le problème d'éblouissement du point lumineux d'une empreinte digitale optique sous-écran dans un environnement sombre ; et une fois la durée d'exposition écoulée, l'image d'empreinte digitale du doigt de l'utilisateur acquise par un capteur d'image d'empreinte digitale est obtenue, et une mise en correspondance et une reconnaissance sont effectuées sur l'image d'empreinte digitale.
PCT/CN2022/071099 2021-01-20 2022-01-10 Procédé de réglage de luminosité d'écran, appareil et dispositif terminal WO2022156555A1 (fr)

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