WO2020088156A1 - 屏下指纹模组、电子设备及指纹图像处理方法 - Google Patents

屏下指纹模组、电子设备及指纹图像处理方法 Download PDF

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Publication number
WO2020088156A1
WO2020088156A1 PCT/CN2019/107868 CN2019107868W WO2020088156A1 WO 2020088156 A1 WO2020088156 A1 WO 2020088156A1 CN 2019107868 W CN2019107868 W CN 2019107868W WO 2020088156 A1 WO2020088156 A1 WO 2020088156A1
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WIPO (PCT)
Prior art keywords
screen
polarizer
light
fingerprint
under
Prior art date
Application number
PCT/CN2019/107868
Other languages
English (en)
French (fr)
Inventor
吴安平
杨乐
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201821777831.XU external-priority patent/CN208922287U/zh
Priority claimed from CN201811280517.5A external-priority patent/CN109284742A/zh
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to EP19879834.0A priority Critical patent/EP3869388A4/en
Publication of WO2020088156A1 publication Critical patent/WO2020088156A1/zh
Priority to US17/244,647 priority patent/US11462048B2/en

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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
    • G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
    • 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
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • 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
    • G06V40/1312—Sensors therefor direct reading, e.g. contactless acquisition

Definitions

  • the present application relates to the technical field of electronic equipment, in particular to an off-screen fingerprint module, electronic equipment, and fingerprint image processing method.
  • an embodiment of the present application provides an off-screen fingerprint module, which is applied to an electronic device, and the electronic device includes a screen and the off-screen fingerprint module set relative to a preset area of the screen;
  • the screen is provided with a first polarizer
  • the under-screen fingerprint module is provided with a second polarizer
  • the polarizing directions of the first polarizer and the second polarizer are the same;
  • the second polarizer is used to filter the second optical noise.
  • the second optical noise is direct light, and the direct light is the second light irradiated in the reverse direction along the Z axis of the screen.
  • the screen is provided with a first polarizer
  • the under-screen fingerprint module is provided with a second polarizer
  • the polarization directions of the first polarizer and the second polarizer are the same;
  • the second polarizer is used to filter the second optical noise.
  • the second optical noise is direct light, and the direct light is the second light irradiated in the reverse direction along the Z axis of the screen.
  • the under-screen fingerprint module collects the light reflected by the emitted light through the user's fingerprint, and the fingerprint image is obtained after processing.
  • an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute the first embodiment of the present application. Part or all of the steps described in any of the three aspects.
  • the electronic device includes a screen and an off-screen fingerprint module set in a preset area opposite to the screen; the screen is provided with a first polarizer, and the under-screen fingerprint module is provided with a second polarizer, And the polarizing directions of the first polarizer and the second polarizer are the same; wherein, the first polarizer and the second polarizer are used to filter the first optical noise, the first optical noise is the reflected light, and the reflected light is the first light The light reflected by the screen, the first light is the light along the positive direction of the Z axis of the screen; the second polarizer is used to filter the second optical noise, the second optical noise is direct light, and the direct light is emitted The second ray of light shining in the reverse direction along the Z axis of the screen.
  • FIG. 2A is a schematic structural diagram of an electronic device according to an embodiment of the present application.
  • 3B is a schematic structural diagram of another fingerprint module provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of another fingerprint image processing method provided by an embodiment of the present application.
  • FIG. 6 is a block diagram of functional units of a fingerprint image processing device provided by an embodiment of the present application.
  • the electronic device involved in the embodiments of the present application may be an electronic device equipped with an optical fingerprint sensor.
  • the electronic device may support wired or wireless charging.
  • the electronic device may be charged in a dedicated charging box and connected to an electronic device such as a mobile phone. It can support functions such as calling and music.
  • Electronic devices can include various handheld devices with wireless communication functions, in-vehicle devices, wearable devices, computing devices or other processing devices connected to wireless modems, as well as various forms of user equipment (User Equipment, UE), Mobile Station (MS), terminal equipment, etc.
  • UE User Equipment
  • MS Mobile Station
  • Fingerprint under the screen is to place the recognition module under the screen panel of the mobile phone.
  • the RGB light emitted by the module penetrates the panel to form a fingerprint light film at the fingertip, and then the collected fingerprint information is fed back to the recognition module.
  • Group through the system comparison to achieve fingerprint authentication, no longer need an external capacitive sensor.
  • the light is emitted from the bottom under the irradiation of the built-in light source. The angle of the light refracted on the uneven lines of the fingerprint on the surface of the finger and the brightness of the light reflected back will be different. After being collected by the optical fingerprint sensor, a multi-gray fingerprint image that can be processed by the fingerprint device algorithm is formed.
  • FIG. 1 is a schematic diagram of a fingerprint optical noise provided by this embodiment, 100
  • 101 is reflected light, that is, the screen light (light from the built-in light source) is reflected upward by the noise surface of the glass; the reflected light is incident perpendicular to the glass upper surface, that is, the reflected light is perpendicular to the direction of the screen.
  • 102 is direct light, that is, the noise light from the screen light (light from the built-in light source) directly reaching the fingerprint sensor (fingerprint sensor). Noise light will cause the accuracy of optical fingerprint recognition and reduce the speed of fingerprint recognition.
  • FIG. 2A is a schematic structural diagram of an electronic device 500 provided by an embodiment of the present application.
  • the under-screen fingerprint module 300 is applied to an electronic device 500.
  • the electronic device 500 includes a screen 100 and a device with respect to the The under-screen fingerprint module 300 set in the preset area of the screen;
  • the second polarizer 310 is used to filter the second optical noise, the second optical noise is direct light, and the direct light is the second light irradiated in the reverse direction along the Z axis of the screen among the emitted light .
  • the coordinate diagram of the screen of the electronic device is at the center of the screen, with the coordinate origin as a reference, the positive direction of the screen Z axis is perpendicular to the screen surface and away from the back cover; It is the direction perpendicular to the screen surface and close to the back cover, that is, the direction opposite to the Z axis of the screen.
  • the under-screen fingerprint module is arranged in the space between the preset area of the screen and the back cover, and may specifically be arranged on the inner surface immediately adjacent to the screen, and is reversed along the Z axis of the screen in the preset area.
  • the preset area of the screen and the fingerprint module under the screen are correspondingly set.
  • the polarizer (Polarizer) is called a polarizer. It is an artificial diaphragm, which has the ability to selectively absorb light vibrations in different directions, and can control the polarization direction of a specific beam, so that there is a special in the diaphragm.
  • the polarizer When the natural light passes through the polarizer, the light vibration component perpendicular to this direction is completely absorbed, and only the light vibration component parallel to this direction is passed, that is, the light whose vibration direction is perpendicular to the transmission axis of the polarizer will be absorbed Only the polarized light whose vibration direction is parallel to the transmission axis of the polarizer is left in the transmitted light.
  • the specific direction of the polarizer is called the polarization vibration direction of the polarizer.
  • the first polarizer may be disposed above the display layer in the screen, and the second polarizer may be disposed in the optical fingerprint module 300 below the display layer.
  • the polarizing directions of the first polarizer and the second polarizer are the same, that is, the first and second polarizers are parallel, and the light passes through the largest.
  • the polarization direction will change, for example, the angle to the polarization direction of the polarizer increases, etc. Etc., so after passing through the second polarizer, the reflected light will be attenuated.
  • the first polarizer and the second polarizer can absorb the light vibration in a specific direction in the first and second optical noises to attenuate the first and second optical noises.
  • the second polarizer and the first polarizer The direction is the same, so the second polarizer will not attenuate the effective light reflected by the fingerprint, thereby reducing the interference of the noise light on the fingerprint collection and identification, achieving noise reduction, and improving the accuracy and efficiency of fingerprint image collection and recognition.
  • the screen 100 includes a liquid crystal display LCD screen or an organic light emitting diode OLED display screen.
  • the screen may be a liquid crystal display LCD screen.
  • the liquid crystal display LCD screen is a flat ultra-thin display device, which is composed of a certain number of color or black and white pixels, and is placed in front of the light source or the reflective surface.
  • the screen may also be an organic light emitting diode OLED display screen.
  • the liquid crystal display LCD screen (the display screen is composed of a pixel layer, a liquid crystal layer, and a backlight layer from top to bottom, the backlight layer emits light, the liquid crystal layer controls the light source to transmit or block, and the pixel layer controls the color display).
  • the liquid crystal layer controls the light emission position of the preset area, that is, the light penetration position; OLED (Organic Light-Emitting Diode (OLED) self-luminous principle), also known as organic electric laser display, organic light emitting semiconductor, directly controls the pre Set the lighting position of the area.
  • OLED Organic Light-Emitting Diode
  • the first optical noise and / or the second optical noise are light emitted from the preset area.
  • the first optical noise 102 is the light emitted from the preset area, reflected by the outer glass of the screen 100 and directed toward the optical fingerprint module; the second optical noise 103 is emitted directly from the preset area toward the light The light that is incident on the optical fingerprint module.
  • the first optical noise and the second optical noise are both perpendicular to the screen 100.
  • the first optical noise and the second optical noise are both perpendicular to the screen, and the polarizer absorbs light vibration in a specific direction among the first and second optical noises, so that the first and second optical noises are attenuated, and Since the direction of the second polarizer is the same as that of the first polarizer, the second polarizer will not attenuate the light emitted by the fingerprint, and finally achieve noise reduction and improve the accuracy of fingerprint image acquisition.
  • the electronic device includes an under-screen fingerprint module including a collimating lens, the second polarizer, an infrared IR film, an optical fingerprint sensor, the collimating lens and all
  • the second polarizer is disposed between the IR films, and the infrared IR film is disposed on the surface of the optical fingerprint sensor.
  • FIG. 3A is a schematic structural diagram of a fingerprint module.
  • the under-screen fingerprint module includes a collimating lens 320, the second polarizer 310, and an infrared IR film 330.
  • the second polarizer 310 is disposed between the collimating lens 320 and the infrared IR film 330, and the infrared IR film 330 is disposed on the surface of the optical fingerprint sensor 340.
  • the second polarizer 310 is disposed between the collimator lens 320 and the infrared IR film 330.
  • the polarizer can absorb the light vibration component in a specific direction of the first and second optical noises perpendicular to the screen 200, so that the first A second optical noise attenuation.
  • the polarizer since the polarizer only passes the light vibration of the polarization analysis parallel to the polarizer, the light vibration component of the specific direction in the first and second optical noises is absorbed. At the same time, since the second polarizer and the first polarizer are in the same direction, the second polarizer will not attenuate the light emitted by the fingerprint, and finally achieve noise reduction and improve the accuracy of fingerprint image collection.
  • the collimating lens 320 and the second polarizer 310 are provided integrally or stacked.
  • the collimator lens 320 and the second polarizer 310 are integratedly configured to embed the polarizer into the collimator lens to form a collimator lens with a polarizing function; the stacked arrangement of the collimator lens 320 and the second polarizer 310 refers to collimating A polarizer is stacked on the side of the straight lens close to the optical fingerprint sensor 340.
  • the collimator lens and the second polarizer are integrated or stacked, which can not only realize the polarizing function, reduce optical noise, and improve the accuracy of fingerprint collection, but also have various setting methods to reduce the screen thickness, etc. .
  • the second polarizer 310 and the infrared IR film 330 are integrated or stacked.
  • the integrated arrangement of the second polarizer 310 and the infrared IR film 330 refers to embedding the polarizer and the infrared IR film to form an infrared IR film having a polarizing function or forming a polarizing film having an infrared IR film function.
  • the stacked arrangement of the second polarizer 310 and the infrared IR film 330 means that a layer of polarizer is stacked on the side of the infrared IR film close to the collimator lens.
  • integrating the second polarizer and the infrared IR film in an integrated or stacked configuration can realize the polarizing function, reduce optical noise, and improve the accuracy of fingerprint collection.
  • FIG. 3B is a schematic structural diagram of a fingerprint module.
  • the under-screen fingerprint module includes a collimating lens 320, the second polarizer 310, and an infrared IR film 330.
  • the second polarizer 310 is disposed between the infrared IR film 330 and the optical fingerprint sensor 340, and the infrared IR film 330 is disposed on the surface of the collimating lens 320.
  • the second polarizer 310 is disposed between the infrared IR film 330 and the fingerprint sensor 340, the polarizer can absorb the light vibration component in a specific direction of the first and second optical noises perpendicular to the screen, so that the first 2. Optical noise attenuation.
  • the polarizer since the polarizer only passes the light vibration of the polarization analysis parallel to the polarizer, the light vibration component of the specific direction in the first and second optical noises is absorbed. At the same time, since the second polarizer and the first polarizer are in the same direction, the second polarizer will not attenuate the light emitted by the fingerprint, and finally achieve noise reduction and improve the accuracy of fingerprint image collection.
  • the IR film 330 and the second polarizer 310 are provided integrally or stacked.
  • the integrated arrangement of the infrared IR film 330 and the second polarizer 310 refers to embedding the infrared IR film and the second polarizer to form an infrared IR film having a polarizing function or forming a polarizing film having an infrared IR film function.
  • the stacked arrangement of the infrared IR film 330 and the second polarizer 310 means that a layer of polarizer is stacked on the side of the infrared IR film 330 near the optical fingerprint sensor 340.
  • integrating the second polarizer and the infrared IR film in an integrated or stacked configuration can realize the polarizing function, reduce optical noise, and improve the accuracy of fingerprint collection.
  • the second polarizer 310 and the optical fingerprint sensor 340 are integrated or stacked.
  • the integrated arrangement of the second polarizer 310 and the infrared IR film 330 refers to embedding the polarizer and the infrared IR film to form an infrared IR film having a polarizing function or forming a polarizing film having an infrared IR film function.
  • the stacked arrangement of the second polarizer 310 and the infrared IR film 330 means that a layer of polarizer is stacked on the side of the optical fingerprint sensor 340 near the infrared IR film 330.
  • integrating the second polarizer and the optical fingerprint sensor in an integrated or stacked configuration can realize the polarizing function, reduce optical noise, improve the accuracy of fingerprint collection, and have various setting methods to reduce the screen thickness.
  • FIG. 4 is a schematic flowchart of a fingerprint image processing method provided by an embodiment of the present application, which is applied to the electronic device described in FIG. 2A.
  • the electronic device includes a screen and a preset provided on the screen.
  • the fingerprint image processing method includes:
  • the electronic device when detecting the fingerprint collection instruction, the electronic device lights the screen and activates the under-screen fingerprint module; wherein, the first optical noise corresponding to the emitted light of the screen is affected by the first polarizer and the The second polarizer filters, the second optical noise corresponding to the emitted light of the screen is filtered by the second polarizer, the first optical noise is reflected light, and the reflected light is the first light passing through the screen Reflected light, the first light is light emitted from the screen along the positive direction of the Z axis of the screen, the second optical noise is direct light, and the direct light is the middle edge of the emitted light The second light irradiated by the Z axis of the screen in the reverse direction;
  • the electronic device collects the light reflected by the emitted light through the user's fingerprint through the under-screen fingerprint module, and obtains a fingerprint image after processing.
  • the electronic device includes a screen and an off-screen fingerprint module set in a preset area opposite to the screen; the screen is provided with a first polarizer, and the under-screen fingerprint module is provided with a second polarizer, And the polarizing directions of the first polarizer and the second polarizer are the same; wherein, the first polarizer and the second polarizer are used to filter the first optical noise, the first optical noise is the reflected light, and the reflected light is the first light The light reflected by the screen, the first light is the light along the positive direction of the Z axis of the screen; the second polarizer is used to filter the second optical noise, the second optical noise is direct light, and the direct light is emitted The second ray of light shining in the reverse direction along the Z axis of the screen.
  • the lighting the screen includes lighting the preset area of the screen.
  • the electronic device when detecting the fingerprint collection instruction, the electronic device lights the preset area of the screen, that is, the area where the fingerprint module under the screen is located.
  • the angle of the light emitted by the built-in light source will be refracted on the uneven lines of the fingerprint on the surface of the finger and the light reflected back and forth will be different, and finally the fingerprint image will be formed.
  • lighting the preset area of the screen can make the area where the fingerprint module under the screen is located higher in brightness, and make the collection of optical fingerprints more accurate and fast.
  • the lighting the screen includes lighting all areas of the screen.
  • the lighting of the preset area of the screen includes: when the screen is in a bright state, increasing the brightness of the preset area of the screen and increasing the The difference in brightness between the preset area of the screen and other areas of the screen; when the screen is off, only the preset area of the screen is lit.
  • the electronic device increases the screen brightness of the preset area when the screen is bright when the fingerprint collection instruction is detected, so that the area where the fingerprint module under the screen is located is higher, and the optical fingerprint collection is more accurate and fast .
  • the screen is off, only the area where the fingerprint module is installed is lit.
  • the lighting of all areas of the screen includes increasing the brightness of the screen when the screen is bright, and lighting the screen when the screen is off All areas of the screen.
  • increasing the brightness of the screen means that the brightness of the screen is raised to the highest level, so that the optical fingerprint sensor can collect the fingerprint light; It is only necessary to light up the brightness of the screen to be greater than the minimum required brightness of the fingerprint collected by the optical fingerprint sensor.
  • the system state of the electronic device when a fingerprint collection instruction is detected, the system state of the electronic device is detected, and the system state includes at least one of the following: a screen state and a battery state.
  • the system state of the electronic device is detected, and the screen is lit according to the system state. For example, when the power is lower than the preset value, only the preset area is lit or the brightness is low, which is only greater than the minimum brightness required by the optical fingerprint sensor to collect fingerprints. When the power is sufficient, you can choose the way to light the screen according to user or system customization.
  • the electronic device can light up the screen according to the system status, which can reduce the energy consumption of the electronic device and save power.
  • FIG. 5 is a schematic flowchart of a fingerprint image processing method provided by an embodiment of the present application, which is applied to the electronic device shown in FIG. 2A.
  • the electronic device includes a screen and a preset provided on the screen.
  • the fingerprint image processing method includes:
  • the electronic device collects the light reflected by the emitted light through the user's fingerprint through the under-screen fingerprint module, and obtains a fingerprint image after processing.
  • the electronic device includes a screen and an off-screen fingerprint module set in a preset area opposite to the screen; the screen is provided with a first polarizer, and the under-screen fingerprint module is provided with a second polarizer, And the polarizing directions of the first polarizer and the second polarizer are the same; wherein, the first polarizer and the second polarizer are used to filter the first optical noise, the first optical noise is the reflected light, and the reflected light is the first light The light reflected by the screen, the first light is the light along the positive direction of the Z axis of the screen; the second polarizer is used to filter the second optical noise, the second optical noise is direct light, and the direct light is emitted The second ray of light shining in the reverse direction along the Z axis of the screen.
  • the first polarizer and the second polarizer can absorb the light vibration in a specific direction in the first and second optical noises to attenuate the first and second optical noises.
  • the second polarizer and the first polarizer The direction is the same, so the second polarizer will not attenuate the effective light reflected by the fingerprint, thereby reducing the interference of the noise light on the fingerprint collection and identification, achieving noise reduction, and improving the accuracy and efficiency of fingerprint image collection and recognition.
  • FIG. 2A is a schematic structural diagram of an electronic device 500 provided by an embodiment of the present application.
  • the electronic device 500 includes a screen and an off-screen fingerprint module set in a preset area of the screen Set; the screen is provided with a first polarizer, the under-screen fingerprint module is provided with a second polarizer, the first polarizer and the second polarizer have the same polarization direction; the first polarizer And the second polarizer are used to filter the first optical noise, the first optical noise is reflected light, the reflected light is light reflected by the first light through the screen, and the first light is Among the emitted light of the screen, the light irradiated in the positive direction of the Z axis of the screen; the second polarizer is used to filter the second optical noise, the second optical noise is direct light, and the direct light is The second ray irradiated in the reverse direction along the Z axis of the screen among the emitted rays.
  • the electronic device includes a screen and an off-screen fingerprint module set in a preset area opposite to the screen; the screen is provided with a first polarizer, and the under-screen fingerprint module is provided with a second polarizer, And the polarizing directions of the first polarizer and the second polarizer are the same; wherein, the first polarizer and the second polarizer are used to filter the first optical noise, the first optical noise is the reflected light, and the reflected light is the first light The light reflected by the screen, the first light is the light along the positive direction of the Z axis of the screen; the second polarizer is used to filter the second optical noise, the second optical noise is direct light, and the direct light is emitted The second ray of light shining in the reverse direction along the Z axis of the screen.
  • the first polarizer and the second polarizer can absorb the light vibration in a specific direction in the first and second optical noises to attenuate the first and second optical noises.
  • the second polarizer and the first polarizer The direction is the same, so the second polarizer will not attenuate the effective light reflected by the fingerprint, thereby reducing the interference of the noise light on the fingerprint collection and identification, achieving noise reduction, and improving the accuracy and efficiency of fingerprint image collection and recognition.
  • the screen includes a liquid crystal display LCD screen or an organic light emitting diode OLED display screen.
  • the screen may be a liquid crystal display LCD screen.
  • the liquid crystal display LCD screen is a flat ultra-thin display device, which is composed of a certain number of color or black and white pixels, and is placed in front of the light source or the reflective surface.
  • the screen may also be an organic light emitting diode OLED display screen.
  • the liquid crystal display LCD screen (the display screen is composed of a pixel layer, a liquid crystal layer, and a backlight layer from top to bottom, the backlight layer emits light, the liquid crystal layer controls the light source to transmit or block, and the pixel layer controls the color display).
  • the liquid crystal layer controls the light emission position of the preset area, that is, the light penetration position; OLED (Organic Light-Emitting Diode (OLED) self-luminous principle), also known as organic electric laser display, organic light emitting semiconductor, directly controls the pre Set the lighting position of the area.
  • OLED Organic Light-Emitting Diode
  • the first optical noise and / or the second optical noise are light emitted from the preset area.
  • the first optical noise 102 is the light emitted from the preset area, reflected by the outer glass of the screen 100 and directed toward the optical fingerprint module; the second optical noise 103 is emitted directly from the preset area toward the light The light that is incident on the optical fingerprint module.
  • the first optical noise and the second optical noise are both perpendicular to the screen 100.
  • the first optical noise and the second optical noise are both perpendicular to the screen, and the polarizer absorbs light vibration in a specific direction among the first and second optical noises, so that the first and second optical noises are attenuated, and Since the direction of the second polarizer is the same as that of the first polarizer, the second polarizer will not attenuate the light emitted by the fingerprint, and finally achieve noise reduction and improve the accuracy of fingerprint image acquisition.
  • the electronic device includes an under-screen fingerprint module including a collimating lens, the second polarizer, an infrared IR film, an optical fingerprint sensor, the collimating lens and all
  • the second polarizer is disposed between the IR films, and the infrared IR film is disposed on the surface of the optical fingerprint sensor.
  • the electronic device includes a hardware structure and / or a software module corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed by hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiments of the present application may divide the functional unit of the electronic device according to the above method example, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit.
  • the above integrated unit may be implemented in the form of hardware or software functional unit. It should be noted that the division of the units in the embodiments of the present application is schematic, and is only a division of logical functions. In actual implementation, there may be another division manner.
  • FIG. 6 is a block diagram of the functional units of the fingerprint image processing device 600 involved in the embodiment of the present application.
  • the fingerprint image processing device 600 is applied to an electronic device, and the electronic device includes a screen and the under-screen fingerprint module set relative to a preset area of the screen.
  • the fingerprint image processing device 600 includes a processing unit 601 and a communication unit 602; where,
  • the processing unit 601 is used to light up the screen through the communication unit when the fingerprint collection instruction is detected and activate the under-screen fingerprint module; wherein, the first optical noise corresponding to the emitted light of the screen is The first polarizer and the second polarizer are filtered, the second optical noise corresponding to the emitted light of the screen is filtered by the second polarizer, the first optical noise is reflected light, and the reflected light Is the light reflected by the first light from the screen, the first light is the light irradiated positively along the Z axis of the light emitted from the screen, the second optical noise is direct light, and the direct light
  • the light rays are the second light rays irradiated in the reverse direction along the Z axis of the screen among the emitted light rays; and the light rays reflected by the emitted light rays by the user's fingerprint are collected by the under-screen fingerprint module, and a fingerprint image is obtained after processing.
  • the fingerprint image processing device 600 further includes a storage unit 603, which is used to store data of the electronic device.
  • the electronic device includes a screen and an off-screen fingerprint module set in a preset area opposite to the screen; the screen is provided with a first polarizer, and the under-screen fingerprint module is provided with a second polarizer, And the polarizing directions of the first polarizer and the second polarizer are the same; wherein, the first polarizer and the second polarizer are used to filter the first optical noise, the first optical noise is the reflected light, and the reflected light is the first light The light reflected by the screen, the first light is the light along the positive direction of the Z axis of the screen; the second polarizer is used to filter the second optical noise, the second optical noise is direct light, and the direct light is emitted The second ray of light shining in the reverse direction along the Z axis of the screen.
  • the first polarizer and the second polarizer can absorb the light vibration in a specific direction in the first and second optical noises to attenuate the first and second optical noises.
  • the second polarizer and the first polarizer The direction is the same, so the second polarizer will not attenuate the effective light reflected by the fingerprint, thereby reducing the interference of the noise light on the fingerprint collection and identification, achieving noise reduction, and improving the accuracy and efficiency of fingerprint image collection and recognition.
  • the processing unit 601 is specifically configured to: light up the preset area of the screen.
  • the processing unit 601 is specifically configured to: light up all areas of the screen.
  • the processing unit 601 is specifically configured to: when the screen is in a bright screen state, increase the pre-processing of the screen Set the brightness of the area to increase the brightness difference between the preset area of the screen and other areas of the screen; when the screen is off, only the preset area of the screen is lit .
  • the processing unit 601 is specifically configured to: when the screen is in a bright screen state, increase the brightness of the screen; when the screen When the screen is off, all areas of the screen are lit.
  • the processing unit 601 when a fingerprint collection instruction is detected, is specifically configured to detect a system state of the electronic device, and the system state includes at least one of the following: a screen state and a battery state.
  • the processing unit 601 may be a processor, the communication unit 602 may be an internal communication bus, etc., and the storage unit 603 may be a memory.
  • An embodiment of the present application further provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program causes the computer to perform part or all of the steps of any method described in the foregoing method embodiments ,
  • the aforementioned computer includes electronic devices.
  • An embodiment of the present application also provides a computer program product, the computer program product includes a non-transitory computer-readable storage medium that stores the computer program, and the computer program is operable to cause the computer to perform any of the methods described in the foregoing method embodiments Some or all steps of the method.
  • the computer program product may be a software installation package, and the computer includes an electronic device.
  • the disclosed device may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the above-mentioned units is only a division of logical functions.
  • there may be other division methods for example, multiple units or components may be combined or integrated To another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above integrated unit may be implemented in the form of hardware or software functional unit.
  • the above integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer readable memory.
  • the technical solution of the present application essentially or part of the contribution to the existing technology or all or part of the technical solution can be embodied in the form of a software product, the computer software product is stored in a memory, Several instructions are included to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the above methods in various embodiments of the present application.
  • the aforementioned memory includes: U disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

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Abstract

一种屏下指纹模组（300）、电子设备（500）及指纹图像处理方法，电子设备（500）包括屏幕（100）和相对于屏幕（100）的预设区域设置的屏下指纹模组（300）；屏幕（100）设置有第一偏光片，屏下指纹模组（300）设置有第二偏光片（310），第一偏光片和第二偏光片（310）的偏光方向一致；第一偏光片和第二偏光片（310）用于对第一光学噪声（102）进行滤波，第一光学噪声（102）为反射光线，反射光线为第一光线经屏幕（100）反射的光线，第一光线为屏幕（100）的发射光线中沿屏幕（100）Z轴正向照射的光线；第二偏光片（310）用于对第二光学噪声（103）进行滤波，第二光学噪声（103）为直射光线，直射光线为发射光线中沿屏幕（100）Z轴反向照射的第二光线。有利于降低指纹光学噪声，提高电子设备（500）采集指纹的准确率和效率。

Description

屏下指纹模组、电子设备及指纹图像处理方法 技术领域
本申请涉及电子设备技术领域，具体涉及一种屏下指纹模组、电子设备及指纹图像处理方法。
背景技术
随着指纹采集技术的不断发展，目前手机等电子设备已经能够支持屏下指纹识别功能，用户启用手机后，可以通过按压电源键等方式触发手机通过屏下指纹模组进行指纹图形的采集，但目前屏下指纹模组的采集图像由于受到光学噪声影响，识别成功率还难以达到传统手机指纹模组的同等要求。
发明内容
本申请实施例提供了一种屏下指纹模组、电子设备及指纹图像处理方法，以期提高电子设备进行指纹图像采集的准确度，提高指纹识别的成功率。
第一方面，本申请实施例提供一种屏下指纹模组，应用于电子设备，所述电子设备包括屏幕和相对于所述屏幕的预设区域设置的所述屏下指纹模组；所述屏幕设置有第一偏光片，所述屏下指纹模组设置有第二偏光片，所述第一偏光片和所述第二偏光片的偏光方向一致；
所述第一偏光片和所述第二偏光片用于对第一光学噪声进行滤波，所述第一光学噪声为反射光线，所述反射光线为第一光线经所述屏幕反射的光线，所述第一光线为所述屏幕的发射光线中沿所述屏幕Z轴正向照射的光线；
所述第二偏光片用于对第二光学噪声进行滤波，所述第二光学噪声为直射光线，所述直射光线为所述发射光线中沿所述屏幕Z轴反向照射的第二光线。
第二方面，本申请实施例提供一种电子设备，包括屏幕和设置于所述屏幕的预设区域的屏下指纹模组；
所述屏幕设置有第一偏光片，所述屏下指纹模组设置有第二偏光片，所述第一偏光片和所述第二偏光片的偏光方向一致；
所述第一偏光片和所述第二偏光片用于对第一光学噪声进行滤波，所述第一光学噪声为反射光线，所述反射光线为第一光线经所述屏幕反射的光线，所述第一光线为所述屏幕的发射光线中沿所述屏幕Z轴正向照射的光线；
所述第二偏光片用于对第二光学噪声进行滤波，所述第二光学噪声为直射光线，所述直射光线为所述发射光线中沿所述屏幕Z轴反向照射的第二光线。
第三方面，本申请实施例提供一种指纹图像处理方法，应用于电子设备，所述电子设备包括屏幕和设置于所述屏幕的预设区域的屏下指纹模组；所述屏幕设置有第一偏光片，所述屏下指纹模组设置有第二偏光片，所述第一偏光片和所述第二偏光片的偏光方向一致；所述方法包括：
在检测到指纹采集指令时，点亮所述屏幕，启用所述屏下指纹模组，其中，所述屏幕的发射光线对应的第一光学噪声被所述第一偏光片和所述第二偏光片滤波，所述屏幕的发射光线对应的第二光学噪声被所述第二偏光片滤波，所述第一光学噪声为反射光线，所述反射光线为第一光线经所述屏幕反射的光线，所述第一光线为所述屏幕的发射光线中沿所述屏幕Z轴正向照射的光线，所述第二光学噪声为直射光线，所述直射光线为所述发射光 线中沿所述屏幕Z轴反向照射的第二光线；
通过所述屏下指纹模组采集所述发射光线经用户指纹反射的光线，处理后得到指纹图像。
第四方面，本申请实施例提供了一种计算机可读存储介质，其中，上述计算机可读存储介质存储用于电子数据交换的计算机程序，其中，上述计算机程序使得计算机执行如本申请实施例第三方面任一方法中所描述的部分或全部步骤。
第五方面，本申请实施例提供了一种计算机程序产品，其中，上述计算机程序产品包括存储了计算机程序的非瞬时性计算机可读存储介质，上述计算机程序可操作来使计算机执行如本申请实施例第三方面任一方法中所描述的部分或全部步骤。该计算机程序产品可以为一个软件安装包。
可以看出，本申请实施例中，电子设备包括屏幕和相对屏幕的预设区域设置的屏下指纹模组；该屏幕设置有第一偏光片，屏下指纹模组设置有第二偏光片，且第一偏光片和第二偏光片的偏光方向一致；其中，第一偏光片和第二偏光片用于对第一光学噪声进行滤波，第一光学噪声为反射光线，反射光线为第一光线经屏幕反射的光线，第一光线为屏幕的发射光线中沿屏幕Z轴正向的光线；第二偏光片用于对第二光学噪声进行滤波，第二光学噪声为直射光线，直射光线为发射光线中沿屏幕Z轴反向照射的第二光线。可见，第一偏光片和第二偏光片能够对第一第二光学噪声中特定方向的光振动进行吸收，以使得第一第二光学噪声衰减，同时，由于第二偏光片与第一偏光片方向一致，所以第二偏光片不会衰减指纹反射的有效光线，从而减少噪声光线对指纹采集识别的干扰，实现降噪，提高指纹图像采集识别的准确度和效率。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例提供的一种指纹光学噪声的示意图；
图2A是本申请实施例提供的一种电子设备的结构示意图；
图2B是本申请实施例提供的一种电子设备的屏幕的坐标示意图
图3A是本申请实施例提供的一种指纹模组的结构示意图；
图3B是本申请实施例提供的另一种指纹模组的结构示意图；
图4是本申请实施例提供的一种指纹图像处理方法的流程示意图；
图5是本申请实施例提供的另一种指纹图像处理方法的流程示意图；
图6是本申请实施例提供的一种指纹图像处理装置的功能单元组成框图。
具体实施方式
为了使本技术领域的人员更好地理解本申请方案，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没 有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其他步骤或单元。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
本申请实施例所涉及到的电子设备可以是具备光学指纹传感器的电子设备，该电子设备可以支持有线或者无线充电，如可以放入专属充电盒中进行充电，且与手机等电子设备连接后，可以支持通话、音乐等功能，电子设备可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其他处理设备，以及各种形式的用户设备(User Equipment，UE)，移动台(Mobile Station，MS)，终端设备(terminal device)等等。
“屏下指纹”就是将识别模组放置在手机屏幕面板之下，在识别的时候通过模组发射的RGB射光穿透面板在指尖形成指纹光膜，随后将采集的指纹信息反馈回识别模组，通过系统比对从而实现指纹认证，不再需要外置的电容式传感器。在指纹采集时，手指在内置光源照射下，光从底部射出，射出的光线在手指表面指纹凹凸不平的线纹上折射的角度及反射回去的光线明暗就会不一样。光学指纹传感器采集后进而形成可被指纹设备算法处理的多灰度指纹图像。但是在内置光源穿透面板在指尖形成指纹光膜以及反射回去时，部分光线形成指纹识别的噪声来源，请参阅图1，图1为本实施例提供的一种指纹光学噪声的示意图,100为屏幕，101为反射光线，即屏幕光(内置光源的光线)向上被玻璃上表面反射的噪声光线；反射光线垂直玻璃上表面入射，即反射光线垂直于屏幕方向。102为直射光线，即屏幕光(内置光源的光线)直接向下到达指纹Sensor(指纹传感器)的噪声光线。噪声光线会造成光学指纹识别的准确性以及降低指纹识别的速度。
针对上述问题，下面对本申请实施例进行详细介绍。
请参阅图2A，图2A是本申请实施例提供了一种电子设备500的结构示意图，所述屏下指纹模组300应用于电子设备500，所述电子设备500包括屏幕100和相对于所述屏幕的预设区域设置的所述屏下指纹模组300；
所述屏幕100设置有第一偏光片，所述屏下指纹模组300设置有第二偏光片302，所述第一偏光片和所述第二偏光片的偏光方向一致；所述第一偏光片和所述第二偏光片用于对第一光学噪声进行滤波，所述第一光学噪声为反射光线，所述反射光线为第一光线经所述屏幕反射的光线，所述第一光线为所述屏幕的发射光线中沿所述屏幕Z轴正向照射的光线；
所述第二偏光片310用于对第二光学噪声进行滤波，所述第二光学噪声为直射光线，所述直射光线为所述发射光线中沿所述屏幕Z轴反向照射的第二光线。
其中，如图2B所示的电子设备的屏幕的坐标示意图，坐标原点在屏幕中心，以坐标原点为参照，屏幕Z轴正向为垂直于屏幕表面且远离后盖的方向；屏幕Z轴反向为垂直于屏幕表面且接近后盖的方向，即与屏幕Z轴正向相反的方向。
其中，屏下指纹模组设置于所述屏幕的预设区域和后盖之间的空间，具体可以设置在紧邻屏幕的内侧表面，且在预设区域内沿屏幕Z轴反向。所述屏幕的预设区域和屏下指纹模组对应设置。
其中，所述偏光片(Polarizer)全称为偏振光片，是一种人工膜片，对不同方向的光振动有选择吸收的性能，可控制特定光束的偏振方向，从而使膜片中有一个特殊的方向，当自然光在通过偏光片时，与此方向垂直的光振动分量完全被吸收，只让平行于该方向的光振 动分量通过，即振动方向与偏光片透过轴垂直的光将被吸收，透过光只剩下振动方向与偏光片透过轴平行的偏振光。偏光片的特定方向叫做偏光片的偏光振化方向。
具体实现中，第一偏光片可设置于屏幕中显示层上方，第二偏光片可设置于显示层下方的光学指纹模组300中。第一偏光片与第二偏光片的偏光方向一致，即第一第二偏光片平行，光通过最大。当屏幕的向远离所述屏下指纹模组照射的第一光线经所述屏幕的外侧玻璃反射的光线经过屏介质后，偏振方向会发生变化，例如和偏光片偏振化方向的角度增大等等，因此在经过第二偏光片后，反射的光线会衰减。
沿所述屏幕Z轴反向照射的第二光线，在经过第二偏光片310时，只有与偏光片的偏振化方向平行的光振动分量通过，而与偏光片偏振化方向垂直的光振动分量完全被吸收，因此，直射噪声光线经过偏光片后光线会衰减一半。
可以看出，本申请实施例中，电子设备包括屏幕和相对屏幕的预设区域设置的屏下指纹模组；该屏幕设置有第一偏光片，屏下指纹模组设置有第二偏光片，且第一偏光片和第二偏光片的偏光方向一致；其中，第一偏光片和第二偏光片用于对第一光学噪声进行滤波，第一光学噪声为反射光线，反射光线为第一光线经屏幕反射的光线，第一光线为屏幕的发射光线中沿屏幕Z轴正向的光线；第二偏光片用于对第二光学噪声进行滤波，第二光学噪声为直射光线，直射光线为发射光线中沿屏幕Z轴反向照射的第二光线。可见，第一偏光片和第二偏光片能够对第一第二光学噪声中特定方向的光振动进行吸收，以使得第一第二光学噪声衰减，同时，由于第二偏光片与第一偏光片方向一致，所以第二偏光片不会衰减指纹反射的有效光线，从而减少噪声光线对指纹采集识别的干扰，实现降噪，提高指纹图像采集识别的准确度和效率。
在一个可能的示例中，所述屏幕100包括液晶显示LCD屏幕或者有机发光二极管OLED显示幕。
其中，所述屏幕可以为液晶显示LCD屏幕，液晶显示LCD屏幕为平面超薄的显示设备，它由一定数量的彩色或黑白像素组成，放置于光源或者反射面前方。所述屏幕还可以为有机发光二极管OLED显示幕。其中，液晶显示LCD屏幕(显示屏由上至下由像素层、液晶层和背光层组成，背光层发光，液晶层控制光源透过或者遮挡，像素层控制颜色显示)，背光点亮后，由液晶层控制预设区域的发光位置，即光线穿透位置；OLED(有机发光二极管(Organic Light-Emitting Diode,OLED)自发光原理)，又称为有机电激光显示、有机发光半导体，直接控制预设区域的点亮位置。
在一个可能的示例中，所述第一光学噪声和/或所述第二光学噪声为所述预设区域发射的光线。
其中，请参阅图1，第一光学噪声102为预设区域发射的光线，经屏幕100的外侧玻璃反射后射向光学指纹模组的光线；第二光学噪声103为预设区域发射后直接向下射向光学指纹模组的光线。第一光学噪声与第二光学噪声均垂直于屏幕100。
可见，本示例中，第一光学噪声与第二光学噪声均垂直于屏幕，偏光片对第一、第二光学噪声中特定方向的光振动进行吸收，以使得第一第二光学噪声衰减，同时，由于第二偏光片与第一偏光片方向一致，所以第二偏光片不会衰减指纹发射的光线，最终实现降噪，提高指纹图像采集准确度。
在一个可能的示例中，电子设备包括屏下指纹模组，所述屏下指纹模组包括准直透镜、所述第二偏光片、红外IR膜、光学指纹传感器，所述准直透镜和所述IR膜之间设置有所述第二偏光片，所述红外IR膜设置于所述光学指纹传感器的表面。
在一个可能的示例中，请参阅图3A，图3A为一种指纹模组的结构示意图，所述屏下指纹模组包括准直透镜320、所述第二偏光片310、红外IR膜330、光学指纹传感器340， 所述准直透镜320和所述红外IR膜330之间设置有所述第二偏光片310，所述红外IR膜330设置于所述光学指纹传感器340的表面。
其中，将第二偏光片310设置于准直透镜320和红外IR膜330之间，偏光片能够对垂直于屏幕200的第一第二光学噪声中特定方向的光振动分量进行吸收，以使得第一第二光学噪声衰减。
可见，本示例中，由于偏光片只让平行于偏光片的偏振化分析的光振动通过，第一第二光学噪声中特定方向的光振动分量被吸收。同时，由于第二偏光片与第一偏光片方向一致，所以第二偏光片不会衰减指纹发射的光线，最终实现降噪，提高指纹图像采集准确度。
在一个可能的示例中，所述准直透镜320和所述第二偏光片310集成设置，或者叠层设置。
其中，准直透镜320和第二偏光片310集成设置是指将偏光片嵌入准直透镜，形成具有偏光功能的准直透镜；准直透镜320和第二偏光片310叠层设置是指在准直透镜的靠近光学指纹传感器340的侧边叠加一层偏光片。
可见，本示例中，将准直透镜和第二偏光片集成设置或者叠层设置，不仅可以实现偏光功能，降低光学噪声，提高指纹采集的准确率，且设置方法多样，可减小屏幕厚度等。
在一个可能的示例中，所述第二偏光片310和所述红外IR膜330集成设置，或者叠层设置。
其中，第二偏光片310和红外IR膜330集成设置是指将偏光片与红外IR膜相嵌，形成具有偏光功能的红外IR膜或形成具有红外IR膜功能的偏光片。第二偏光片310和红外IR膜330叠层设置是指在红外IR膜的靠近准直透镜的侧边叠加一层偏光片。
可见，本示例中，将第二偏光片和红外IR膜集成设置或者叠层设置可以实现偏光功能，降低光学噪声，提高指纹采集的准确率，且设置方法多样，可减小屏幕厚度等。
在一个可能的示例中，请参阅图3B，图3B为一种指纹模组的结构示意图，所述屏下指纹模组包括准直透镜320、所述第二偏光片310、红外IR膜330、光学指纹传感器340，所述红外IR膜330和所述光学指纹传感器340之间设置有所述第二偏光片310，所述红外IR膜330设置于所述准直透镜320的表面。
其中，将第二偏光片310设置于红外IR膜330和指纹传感器340之间，偏光片能够对垂直于屏幕的第一第二光学噪声中特定方向的光振动分量进行吸收，以使得第一第二光学噪声衰减。
可见，本示例中，由于偏光片只让平行于偏光片的偏振化分析的光振动通过，第一第二光学噪声中特定方向的光振动分量被吸收。同时，由于第二偏光片与第一偏光片方向一致，所以第二偏光片不会衰减指纹发射的光线，最终实现降噪，提高指纹图像采集准确度。
在一个可能的示例中，所述IR膜330和所述第二偏光片310集成设置，或者叠层设置。
其中，红外IR膜330和第二偏光片310集成设置是指将红外IR膜与第二偏光片相嵌，形成具有偏光功能的红外IR膜或形成具有红外IR膜功能的偏光片。红外IR膜330和第二偏光片310叠层设置是指在红外IR膜330的靠近光学指纹传感器340的侧边叠加一层偏光片。
可见，本示例中，将第二偏光片和红外IR膜集成设置或者叠层设置可以实现偏光功能，降低光学噪声，提高指纹采集的准确率，且设置方法多样，可减小屏幕厚度等。
在一个可能的示例中，所述第二偏光片310和所述光学指纹传感器340集成设置，或者叠层设置。
其中，第二偏光片310和红外IR膜330集成设置是指将偏光片与红外IR膜相嵌，形成具有偏光功能的红外IR膜或形成具有红外IR膜功能的偏光片。第二偏光片310和红外 IR膜330叠层设置是指在光学指纹传感器340的靠近红外IR膜330的侧边叠加一层偏光片。
可见，本示例中，将第二偏光片和光学指纹传感器集成设置或者叠层设置可以实现偏光功能，降低光学噪声，提高指纹采集的准确率，且设置方法多样，可减小屏幕厚度等。
请参阅图4，图4是本申请实施例提供了一种指纹图像处理方法的流程示意图，应用于如图2A所述的电子设备，所述电子设备包括屏幕和设置于所述屏幕的预设区域的屏下指纹模组；所述屏幕设置有第一偏光片，所述屏下指纹模组设置有第二偏光片，所述第一偏光片和所述第二偏光片的偏光方向一致；如图所示，本指纹图像处理方法包括：
S401，电子设备在检测到指纹采集指令时，点亮所述屏幕，启用所述屏下指纹模组；其中，所述屏幕的发射光线对应的第一光学噪声被所述第一偏光片和所述第二偏光片滤波，所述屏幕的发射光线对应的第二光学噪声被所述第二偏光片滤波，所述第一光学噪声为反射光线，所述反射光线为第一光线经所述屏幕反射的光线，所述第一光线为所述屏幕的发射光线中沿所述屏幕Z轴正向照射的光线，所述第二光学噪声为直射光线，所述直射光线为所述发射光线中沿所述屏幕Z轴反向照射的第二光线；
S402，所述电子设备通过所述屏下指纹模组采集所述发射光线经用户指纹反射的光线，处理后得到指纹图像。
可以看出，本申请实施例中，电子设备包括屏幕和相对屏幕的预设区域设置的屏下指纹模组；该屏幕设置有第一偏光片，屏下指纹模组设置有第二偏光片，且第一偏光片和第二偏光片的偏光方向一致；其中，第一偏光片和第二偏光片用于对第一光学噪声进行滤波，第一光学噪声为反射光线，反射光线为第一光线经屏幕反射的光线，第一光线为屏幕的发射光线中沿屏幕Z轴正向的光线；第二偏光片用于对第二光学噪声进行滤波，第二光学噪声为直射光线，直射光线为发射光线中沿屏幕Z轴反向照射的第二光线。可见，第一偏光片和第二偏光片能够对第一第二光学噪声中特定方向的光振动进行吸收，以使得第一第二光学噪声衰减，同时，由于第二偏光片与第一偏光片方向一致，所以第二偏光片不会衰减指纹反射的有效光线，从而减少噪声光线对指纹采集识别的干扰，实现降噪，提高指纹图像采集识别的准确度和效率。
在一个可能的示例中，所述点亮所述屏幕，包括：点亮所述屏幕的所述预设区域。
其中，电子设备在检测到指纹采集指令时，点亮所述屏幕的预设区域，即点亮屏下指纹模组所在的区域。内置光源射出的光线在手指表面指纹凹凸不平的线纹上折射的角度及反射回去的光线明暗就会不一样，最终形成指纹图像。
可见，本示例中，点亮所述屏幕的预设区域，可以使屏下指纹模组所在的区域的亮度更高，使光学指纹的采集更准确，快捷。
在一个可能的示例中，所述点亮所述屏幕，包括：点亮所述屏幕的全部区域。
可见，本示例中，点亮所述屏幕的全部区域，使光学指纹的采集更准确，快捷。
在一个可能的示例中，所述点亮所述屏幕的所述预设区域，包括：当所述屏幕为亮屏状态时，提高所述屏幕的所述预设区域的亮度，增大所述屏幕的所述预设区域与所述屏幕的其他区域的亮度差值；当所述屏幕为熄屏状态时，只点亮所述屏幕的所述预设区域。
其中，电子设备在检测到指纹采集指令时屏幕为亮屏状态时，增大预设区域的屏幕亮度，使屏下指纹模组所在的区域的亮度更高，使光学指纹的采集更准确，快捷。当所述屏幕为熄屏状态时，只针对设置有指纹模组的区域进行点亮。
可见，本示例中，亮屏时提高所述屏幕的所述预设区域的亮度或熄屏时只点亮预设区域，能够减少预设区域外的光线对光学指纹传感器的影响，使光学指纹的采集更准确，快 捷。
在一个可能的示例中，所述点亮所述屏幕的全部区域，包括当所述屏幕为亮屏状态时，提高所述屏幕的亮度；当所述屏幕为熄屏状态时，点亮所述屏幕的全部区域。
其中，屏幕为亮屏状态时，提高所述屏幕的亮度是指将屏幕亮度提到最高，以便于光学指纹传感器采集指纹光线；屏幕为熄屏状态时，点亮所述屏幕的全部区域，可以是将屏幕亮度点亮至大于光学指纹传感器采集指纹的最低需求亮度即可。
可见，本示例中，点亮所述屏幕的全部区域，使光学指纹的采集更准确，快捷。
在一个可能的示例中，在检测到指纹采集指令时，检测所述电子设备的系统状态，所述系统状态包括以下至少一种：屏幕状态、电池状态。
其中，在检测到指纹采集指令时，检测所述电子设备的系统状态，根据系统状态点亮屏幕。例如电量低于预设值时，只点亮预设区域或者点亮亮度较低，仅大于光学指纹传感器采集指纹所需的最低亮度即可。当电量充足时，可以根据用户或系统自定义选择点亮屏幕的方式。
可见，本示例中，电子设备可以根据系统状态点亮屏幕，能够降低电子设备的能耗，节省电源电量。
请参阅图5，图5是本申请实施例提供了一种指纹图像处理方法的流程示意图，应用于如图2A所述的电子设备，所述电子设备包括屏幕和设置于所述屏幕的预设区域的屏下指纹模组；所述屏幕设置有第一偏光片，所述屏下指纹模组设置有第二偏光片，所述第一偏光片和所述第二偏光片的偏光方向一致；如图所示，本指纹图像处理方法包括：
S501，电子设备在检测到指纹采集指令时，检测所述电子设备的系统状态；
S502,所述电子设备的电量低于预设阈值时，点亮所述屏幕的预设区域或以光学指纹传感器采集指纹所需的最低亮度点亮所述屏幕；
S503，所述电子设备电量充足时，自定义点亮屏幕的方式；
S504，所述电子设备通过所述屏下指纹模组采集所述发射光线经用户指纹反射的光线，处理后得到指纹图像。
可以看出，本申请实施例中，电子设备包括屏幕和相对屏幕的预设区域设置的屏下指纹模组；该屏幕设置有第一偏光片，屏下指纹模组设置有第二偏光片，且第一偏光片和第二偏光片的偏光方向一致；其中，第一偏光片和第二偏光片用于对第一光学噪声进行滤波，第一光学噪声为反射光线，反射光线为第一光线经屏幕反射的光线，第一光线为屏幕的发射光线中沿屏幕Z轴正向的光线；第二偏光片用于对第二光学噪声进行滤波，第二光学噪声为直射光线，直射光线为发射光线中沿屏幕Z轴反向照射的第二光线。可见，第一偏光片和第二偏光片能够对第一第二光学噪声中特定方向的光振动进行吸收，以使得第一第二光学噪声衰减，同时，由于第二偏光片与第一偏光片方向一致，所以第二偏光片不会衰减指纹反射的有效光线，从而减少噪声光线对指纹采集识别的干扰，实现降噪，提高指纹图像采集识别的准确度和效率。
请参阅图2A，图2A是本申请实施例提供的一种电子设备500的结构示意图，如图所示，所述电子设备500包括屏幕和设置于所述屏幕的预设区域的屏下指纹模组；所述屏幕设置有第一偏光片，所述屏下指纹模组设置有第二偏光片，所述第一偏光片和所述第二偏光片的偏光方向一致；所述第一偏光片和所述第二偏光片用于对第一光学噪声进行滤波，所述第一光学噪声为反射光线，所述反射光线为第一光线经所述屏幕反射的光线，所述第一光线为所述屏幕的发射光线中沿所述屏幕Z轴正向照射的光线；所述第二偏光片用于对第二光学噪声进行滤波，所述第二光学噪声为直射光线，所述直射光线为所述发射光线中沿所述屏幕Z轴反向照射的第二光线。
可以看出，本申请实施例中，电子设备包括屏幕和相对屏幕的预设区域设置的屏下指纹模组；该屏幕设置有第一偏光片，屏下指纹模组设置有第二偏光片，且第一偏光片和第二偏光片的偏光方向一致；其中，第一偏光片和第二偏光片用于对第一光学噪声进行滤波，第一光学噪声为反射光线，反射光线为第一光线经屏幕反射的光线，第一光线为屏幕的发射光线中沿屏幕Z轴正向的光线；第二偏光片用于对第二光学噪声进行滤波，第二光学噪声为直射光线，直射光线为发射光线中沿屏幕Z轴反向照射的第二光线。可见，第一偏光片和第二偏光片能够对第一第二光学噪声中特定方向的光振动进行吸收，以使得第一第二光学噪声衰减，同时，由于第二偏光片与第一偏光片方向一致，所以第二偏光片不会衰减指纹反射的有效光线，从而减少噪声光线对指纹采集识别的干扰，实现降噪，提高指纹图像采集识别的准确度和效率。
在一个可能的示例中，所述屏幕包括液晶显示LCD屏幕或者有机发光二极管OLED显示幕。
其中，所述屏幕可以为液晶显示LCD屏幕，液晶显示LCD屏幕为平面超薄的显示设备，它由一定数量的彩色或黑白像素组成，放置于光源或者反射面前方。所述屏幕还可以为有机发光二极管OLED显示幕。其中，液晶显示LCD屏幕(显示屏由上至下由像素层、液晶层和背光层组成，背光层发光，液晶层控制光源透过或者遮挡，像素层控制颜色显示)，背光点亮后，由液晶层控制预设区域的发光位置，即光线穿透位置；OLED(有机发光二极管(Organic Light-Emitting Diode,OLED)自发光原理)，又称为有机电激光显示、有机发光半导体，直接控制预设区域的点亮位置。
在一个可能的示例中，所述第一光学噪声和/或所述第二光学噪声为所述预设区域发射的光线。
其中，请参阅图1，第一光学噪声102为预设区域发射的光线，经屏幕100的外侧玻璃反射后射向光学指纹模组的光线；第二光学噪声103为预设区域发射后直接向下射向光学指纹模组的光线。第一光学噪声与第二光学噪声均垂直于屏幕100。
可见，本示例中，第一光学噪声与第二光学噪声均垂直于屏幕，偏光片对第一、第二光学噪声中特定方向的光振动进行吸收，以使得第一第二光学噪声衰减，同时，由于第二偏光片与第一偏光片方向一致，所以第二偏光片不会衰减指纹发射的光线，最终实现降噪，提高指纹图像采集准确度。
在一个可能的示例中，电子设备包括屏下指纹模组，所述屏下指纹模组包括准直透镜、所述第二偏光片、红外IR膜、光学指纹传感器，所述准直透镜和所述IR膜之间设置有所述第二偏光片，所述红外IR膜设置于所述光学指纹传感器的表面。
上述主要从结构和方法侧执行过程的角度对本申请实施例的方案进行了介绍。可以理解的是，电子设备为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所提供的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对电子设备进行功能单元的划分，例如，可以对应各个功能划分各个功能单元，也可以将两个或两个以上的功能集成在一个处理单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。需要说明的是，本申请实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
图6是本申请实施例中所涉及的指纹图像处理装置600的功能单元组成框图。该指纹图像处理装置600应用于电子设备，所述电子设备包括屏幕和相对于所述屏幕的预设区域设置的所述屏下指纹模组，该指纹图像处理装置600包括处理单元601、通信单元602；其中，
所述处理单元601用于在检测到指纹采集指令时，通过所述通信单元点亮所述屏幕，启用所述屏下指纹模组；其中，所述屏幕的发射光线对应的第一光学噪声被所述第一偏光片和所述第二偏光片滤波，所述屏幕的发射光线对应的第二光学噪声被所述第二偏光片滤波，所述第一光学噪声为反射光线，所述反射光线为第一光线经所述屏幕反射的光线，所述第一光线为所述屏幕的发射光线中沿所述屏幕Z轴正向照射的光线，所述第二光学噪声为直射光线，所述直射光线为所述发射光线中沿所述屏幕Z轴反向照射的第二光线；以及通过所述屏下指纹模组采集所述发射光线经用户指纹反射的光线，处理后得到指纹图像。
其中，所述指纹图像处理装置600还包括存储单元603，该存储单元用于存储电子设备的数据。
可以看出，本申请实施例中，电子设备包括屏幕和相对屏幕的预设区域设置的屏下指纹模组；该屏幕设置有第一偏光片，屏下指纹模组设置有第二偏光片，且第一偏光片和第二偏光片的偏光方向一致；其中，第一偏光片和第二偏光片用于对第一光学噪声进行滤波，第一光学噪声为反射光线，反射光线为第一光线经屏幕反射的光线，第一光线为屏幕的发射光线中沿屏幕Z轴正向的光线；第二偏光片用于对第二光学噪声进行滤波，第二光学噪声为直射光线，直射光线为发射光线中沿屏幕Z轴反向照射的第二光线。可见，第一偏光片和第二偏光片能够对第一第二光学噪声中特定方向的光振动进行吸收，以使得第一第二光学噪声衰减，同时，由于第二偏光片与第一偏光片方向一致，所以第二偏光片不会衰减指纹反射的有效光线，从而减少噪声光线对指纹采集识别的干扰，实现降噪，提高指纹图像采集识别的准确度和效率。
在一个可能的示例中，在所述点亮所述屏幕方面，所述处理单元601具体用于：点亮所述屏幕的所述预设区域。
在一个可能的示例中，在所述点亮所述屏幕方面，所述处理单元601具体用于：点亮所述屏幕的全部区域。
在一个可能的示例中，在所述点亮所述屏幕的所述预设区域方面，所述处理单元601具体用于：当所述屏幕为亮屏状态时，提高所述屏幕的所述预设区域的亮度，增大所述屏幕的所述预设区域与所述屏幕的其他区域的亮度差值；当所述屏幕为熄屏状态时，只点亮所述屏幕的所述预设区域。
在一个可能的示例中，在所述点亮所述屏幕的全部区域方面，所述处理单元601具体用于：当所述屏幕为亮屏状态时，提高所述屏幕的亮度；当所述屏幕为熄屏状态时，点亮所述屏幕的全部区域。
在一个可能的示例中，在检测到指纹采集指令时，所述处理单元601具体用于：检测所述电子设备的系统状态，所述系统状态包括以下至少一种：屏幕状态、电池状态。
其中，处理单元601可以是处理器，通信单元602可以是内部通信总线等，存储单元603可以是存储器。
本申请实施例还提供一种计算机存储介质，其中，该计算机存储介质存储用于电子数据交换的计算机程序，该计算机程序使得计算机执行如上述方法实施例中记载的任一方法的部分或全部步骤，上述计算机包括电子设备。
本申请实施例还提供一种计算机程序产品，上述计算机程序产品包括存储了计算机程序的非瞬时性计算机可读存储介质，上述计算机程序可操作来使计算机执行如上述方法实 施例中记载的任一方法的部分或全部步骤。该计算机程序产品可以为一个软件安装包，上述计算机包括电子设备。
需要说明的是，对于前述的各方法实施例，为了简单描述，故将其都表述为一系列的动作组合，但是本领域技术人员应该知悉，本申请并不受所描述的动作顺序的限制，因为依据本申请，某些步骤可以采用其他顺序或者同时进行。其次，本领域技术人员也应该知悉，说明书中所描述的实施例均属于优选实施例，所涉及的动作和模块并不一定是本申请所必须的。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置，可通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如上述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性或其它的形式。
上述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
上述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储器中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储器中，包括若干指令用以使得一台计算机设备(可为个人计算机、服务器或者网络设备等)执行本申请各个实施例上述方法的全部或部分步骤。而前述的存储器包括：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，该程序可以存储于一计算机可读存储器中，存储器可以包括：闪存盘、只读存储器(英文：Read-Only Memory，简称：ROM)、随机存取器(英文：Random Access Memory，简称：RAM)、磁盘或光盘等。
以上对本申请实施例进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的一般技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (20)

  1. 一种屏下指纹模组，其特征在于，应用于电子设备，所述电子设备包括屏幕和相对于所述屏幕的预设区域设置的所述屏下指纹模组；所述屏幕设置有第一偏光片，所述屏下指纹模组设置有第二偏光片，所述第一偏光片和所述第二偏光片的偏光方向一致；
    所述第一偏光片和所述第二偏光片用于对第一光学噪声进行滤波，所述第一光学噪声为反射光线，所述反射光线为第一光线经所述屏幕反射的光线，所述第一光线为所述屏幕的发射光线中沿所述屏幕Z轴正向照射的光线；
    所述第二偏光片用于对第二光学噪声进行滤波，所述第二光学噪声为直射光线，所述直射光线为所述发射光线中沿所述屏幕Z轴反向照射的第二光线。
  2. 根据权利要求1所述的屏下指纹模组，其特征在于，所述屏下指纹模组包括准直透镜、所述第二偏光片、红外IR膜、光学指纹传感器，所述准直透镜和所述IR膜之间设置有所述第二偏光片，所述红外IR膜设置于所述光学指纹传感器的表面。
  3. 根据权利要求2所述的屏下指纹模组，其特征在于，所述准直透镜和所述第二偏光片集成设置，或者叠层设置。
  4. 根据权利要求3所述的屏下指纹模组，其特征在于，所述准直透镜和所述第二偏光片集成设置是指将所述第二偏光片嵌入所述准直透镜，形成具有偏光功能的准直透镜；
    所述准直透镜和所述第二偏光片叠层设置是指在所述准直透镜的靠近所述光学指纹传感器的侧边叠加所述第二偏光片。
  5. 根据权利要求2所述的屏下指纹模组，其特征在于，所述第二偏光片和所述IR膜集成设置，或者叠层设置。
  6. 根据权利要求1所述的屏下指纹模组，其特征在于，所述屏下指纹模组包括准直透镜、所述第二偏光片、红外IR膜、光学指纹传感器，所述IR膜和所述光学指纹传感器之间设置有所述第二偏光片，所述红外IR膜设置于所述准直透镜的表面。
  7. 根据权利要求6所述的屏下指纹模组，其特征在于，所述IR膜和所述第二偏光片集成设置，或者叠层设置。
  8. 根据权利要求6所述的屏下指纹模组，其特征在于，所述第二偏光片和所述光学指纹传感器集成设置，或者叠层设置。
  9. 一种电子设备，其特征在于，包括屏幕和设置于所述屏幕的预设区域的屏下指纹模组；
    所述屏幕设置有第一偏光片，所述屏下指纹模组设置有第二偏光片，所述第一偏光片和所述第二偏光片的偏光方向一致；
    所述第一偏光片和所述第二偏光片用于对第一光学噪声进行滤波，所述第一光学噪声为反射光线，所述反射光线为第一光线经所述屏幕反射的光线，所述第一光线为所述屏幕的发射光线中沿所述屏幕Z轴正向照射的光线；
    所述第二偏光片用于对第二光学噪声进行滤波，所述第二光学噪声为直射光线，所述直射光线为所述发射光线中沿所述屏幕Z轴反向照射的第二光线。
  10. 根据权利要求9所述的电子设备，其特征在于，所述屏下指纹模组设置于所述屏幕的预设区域和后盖之间的空间，且设置在紧邻屏幕的内侧表面；
    所述屏幕的预设区域和所述屏下指纹模组对应。
  11. 根据权利要求10所述的电子设备，其特征在于，所述屏幕包括液晶显示LCD屏幕或者有机发光二极管OLED显示幕。
  12. 根据权利要求9-11任一项所述的电子设备，其特征在于，所述第一光学噪声和/或所述第二光学噪声为所述预设区域发射的光线。
  13. 根据权利要求12所述的电子设备，其特征在于，第一光学噪声与第二光学噪声均垂直于屏幕。
  14. 一种指纹图像处理方法，其特征在于，应用于电子设备，所述电子设备包括屏幕和设置于所述屏幕的预设区域的屏下指纹模组；所述屏幕设置有第一偏光片，所述屏下指纹模组设置有第二偏光片，所述第一偏光片和所述第二偏光片的偏光方向一致；所述方法包括：
    在检测到指纹采集指令时，点亮所述屏幕，启用所述屏下指纹模组，其中，所述屏幕的发射光线对应的第一光学噪声被所述第一偏光片和所述第二偏光片滤波，所述屏幕的发射光线对应的第二光学噪声被所述第二偏光片滤波，所述第一光学噪声为反射光线，所述反射光线为第一光线经所述屏幕反射的光线，所述第一光线为所述屏幕的发射光线中沿所述屏幕Z轴正向照射的光线，所述第二光学噪声为直射光线，所述直射光线为所述发射光线中沿所述屏幕Z轴反向照射的第二光线；
    通过所述屏下指纹模组采集所述发射光线经用户指纹反射的光线，处理后得到指纹图像。
  15. 根据权利要求14所述的方法，其特征在于，所述点亮所述屏幕，包括：
    点亮所述屏幕的所述预设区域。
  16. 根据权利要求15所述的方法，其特征在于，所述点亮所述屏幕的所述预设区域，包括：
    当所述屏幕为亮屏状态时，提高所述屏幕的所述预设区域的亮度，增大所述屏幕的所述预设区域与所述屏幕的其他区域的亮度差值；
    当所述屏幕为熄屏状态时，只点亮所述屏幕的所述预设区域。
  17. 根据权利要求14所述的方法，其特征在于，所述点亮所述屏幕，包括：
    点亮所述屏幕的全部区域。
  18. 根据权利要求17所述的方法，其特征在于，所述点亮所述屏幕的全部区域，包括：
    当所述屏幕为亮屏状态时，提高所述屏幕的亮度；
    当所述屏幕为熄屏状态时，点亮所述屏幕的全部区域。
  19. 根据权利要求15-18任一项所述的方法，其特征在于，所述点亮所述屏幕，包括：
    检测所述电子设备的系统状态，根据系统状态点亮屏幕。
  20. 根据权利要求19所述的方法，其特征在于，所述系统状态包括以下至少一种：屏幕状态、电池状态。
PCT/CN2019/107868 2018-10-30 2019-09-25 屏下指纹模组、电子设备及指纹图像处理方法 WO2020088156A1 (zh)

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