WO2020077506A1 - Procédé et appareil de reconnaissance d'empreinte digitale et dispositif terminal à fonction de reconnaissance d'empreinte digitale - Google Patents

Procédé et appareil de reconnaissance d'empreinte digitale et dispositif terminal à fonction de reconnaissance d'empreinte digitale Download PDF

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Publication number
WO2020077506A1
WO2020077506A1 PCT/CN2018/110299 CN2018110299W WO2020077506A1 WO 2020077506 A1 WO2020077506 A1 WO 2020077506A1 CN 2018110299 W CN2018110299 W CN 2018110299W WO 2020077506 A1 WO2020077506 A1 WO 2020077506A1
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WO
WIPO (PCT)
Prior art keywords
light
fingerprint
touch operation
terminal device
sub
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Application number
PCT/CN2018/110299
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English (en)
Chinese (zh)
Inventor
谢浩
Original Assignee
深圳市汇顶科技股份有限公司
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.)
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Publication date
Application filed by 深圳市汇顶科技股份有限公司 filed Critical 深圳市汇顶科技股份有限公司
Priority to CN201880002095.7A priority Critical patent/CN109564628A/zh
Priority to PCT/CN2018/110299 priority patent/WO2020077506A1/fr
Publication of WO2020077506A1 publication Critical patent/WO2020077506A1/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
    • G06V40/1365—Matching; Classification
    • 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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers

Definitions

  • the present application relates to the field of fingerprint identification, in particular to a fingerprint identification method and device, and a terminal device with a fingerprint identification function.
  • Under-screen optical fingerprints are currently mass-produced under Organic Light-Emitting Diode (OLED) screens, which use the light-transmitting properties of the OLED screen itself and the light emitted by the screen itself to illuminate the finger to detect the fingerprint;
  • OLED Organic Light-Emitting Diode
  • LCD Liquid crystal display
  • Due to the opaqueness of the steel plate and the reflective film in the backlight module, plus the diffuser film in the backlight module has a fogging effect on the light
  • the brightness enhancement film has a directional constraint on the light
  • the terminal device of the LCD screen cannot realize fingerprint detection.
  • the present application provides a fingerprint identification method, device, and terminal device with a fingerprint identification function, which can implement fingerprint detection on an LCD screen.
  • a terminal device having a fingerprint recognition function includes: a glass cover (1000) for providing a touch interface for fingerprint recognition by a finger; a liquid crystal panel (2000) located on the glass Under the cover plate (1000), used to display images; fingerprint identification light source (5000), located under the glass cover plate (1000), used to emit light and illuminate the fingers to generate return light; backlight module (3000) , Located under the liquid crystal panel (2000), for providing a light source for the liquid crystal panel (2000) to display images, including a first light guide plate (3200) and a non-light guide plate structure (3100), the non-light guide plate structure ( 3100) includes a fingerprint detection light-transmitting area (3101), which is used to transmit the returned light; a fingerprint recognition module (4000) is located under the fingerprint detection light-transmitting area (3101) , For receiving the return light passing through the fingerprint detection light-transmitting area (3101), and obtaining a fingerprint image according to the return light, the fingerprint image being used for the terminal device to
  • the fingerprint detection light-transmitting area (3101) is a through hole on the non-light guide plate structure (3100).
  • the fingerprint detection light-transmitting area (3101) is an area filled with optical ink on the non-light guide plate structure (3100).
  • the optical ink has wavelength selectivity and has a good transmittance for light emitted by the fingerprint identification light source (5000).
  • the size of the fingerprint detection light-transmitting area (3101) is related to the FOV of the fingerprint identification module (4000).
  • the size of the fingerprint detection light-transmitting area of the uppermost layer structure in the non-light guide plate structure (3100) is related to the FOV of the fingerprint identification module (4000).
  • the non-light guide plate structure includes at least one of the following layers: a composite film (3110), a light-enhancing film (3120), and a diffusion film (3130 ), The first reflective film (3140) and the steel plate (3150).
  • the size of the fingerprint detection transparent area of the composite film (3110) is related to the FOV of the fingerprint identification module (4000).
  • the size of the fingerprint detection transparent area of the gloss enhancement film (3120), the diffusion film (3130), the first reflective film (3140), and the steel plate (3150) are larger than that of the composite film (3110) size.
  • the composite film (3110), the brightness enhancement film (3120), and the diffusion film (3130) are located in the first Above the light guide plate (3200), the first reflective film (3140) and the steel plate (3150) are located below the first light guide plate (3200).
  • the terminal device further includes: a fill light device (6000) located below the fingerprint detection light-transmitting area (3101) and Located above the fingerprint identification module (4000), it is used for backlight compensation of the fingerprint detection light-transmitting area (3101).
  • a fill light device located below the fingerprint detection light-transmitting area (3101) and Located above the fingerprint identification module (4000), it is used for backlight compensation of the fingerprint detection light-transmitting area (3101).
  • the light supplement device (6000) includes a backlight (6100) and a second light guide plate (6200), and the backlight ( 6100) is located around the second light guide plate (6200), and the second light guide plate (6200) is used to conduct the light emitted by the backlight (6100).
  • the light supplement device (6000) further includes: a second reflective film (6300), which is located in the backlight (6100) and Below the second light guide plate (6200) is used to reflect the light emitted by the backlight (6100) and the light conducted by the second light guide plate (6200) to the fingerprint detection light transmission area (3101);
  • the second reflective film (6300) has a through hole (6310), and the through hole (6310) is used to transparently transmit the returned light to the fingerprint identification module (4000).
  • a light filter (7000) is provided between the light supplement device (6000) and the fingerprint recognition module (4000) ,
  • the filter (7000) is used to filter the light transmitted to the fingerprint recognition module (4000) except the return light.
  • the fingerprint identification light source (5000) and the liquid crystal panel (2000) do not block each other.
  • the fingerprint identification light source (5000) is fixed under the glass cover plate (1000) by optical glue (5001).
  • the angle between the light emitting plane of the fingerprint identification light source (5000) and the surface of the glass cover (1000) is not Is zero.
  • the light emitted by the fingerprint identification light source (5000) is infrared light.
  • the liquid crystal panel (2000) includes: a fingerprint detection area (2100), and the fingerprint detection area (2100) is used for: The finger touches to perform the fingerprint identification, and the light emitted by the fingerprint identification light source (5000) illuminates the return light generated by the finger and is transmitted to the fingerprint identification module (4000) through the fingerprint sensing area (121) .
  • the fingerprint detection area (2100) overlaps with virtual keys on the liquid crystal panel (2000).
  • the fingerprint identification module (4000) further includes a processing unit (4100), and the processing unit (4100) is used to: control
  • the fingerprint identification light source (5000) emits light according to a modulation frequency, and performs demodulation processing on the return light; according to the demodulated return light, the fingerprint image of the finger is acquired.
  • the fingerprint detection area (2100) includes multiple sub-areas
  • the fingerprint identification module (4000) further includes a processing unit (4100 )
  • the processing unit (4100) is used to: determine whether the plurality of sub-regions have touch data according to the touch operation in the fingerprint detection area; determine the touch operation according to whether the plurality of sub-regions have touch data Whether it is valid; if the touch operation is valid, perform fingerprint recognition on the touch operation through the fingerprint recognition module.
  • the processing unit (4100) is further configured to: if the number of sub-regions with touch data in the plurality of sub-regions is greater than Or equal to a preset value, it is determined that the touch operation is valid.
  • the terminal device further includes a light sensor (1900), and the processing unit (4100) is further configured to: The number of sub-regions with touch data in the region is greater than or equal to a preset value, and the light sensor is not blocked, and it is determined that the touch operation is valid.
  • the processing unit (4100) is further configured to: if each of the plurality of sub-regions has touch data, determine The touch operation described above is valid.
  • the terminal device further includes a light sensor (1900), and the processing unit (4100) is further configured to: Each sub-region in the region has touch data, and the light sensor is not blocked, and it is determined that the touch operation is valid.
  • the processing unit (4100) is further configured to: obtain touch data according to the position of each sub-region and each together Time to determine the form of the touch operation, different forms correspond to different applications; if the touch operation is valid, after the fingerprint recognition of the touch operation by the fingerprint recognition module is successful, run and touch The application corresponding to the form of operation.
  • the multiple sub-regions are distributed on the fingerprint detection region according to a preset rule.
  • the preset rule includes: any two sub-regions in the plurality of sub-regions do not overlap.
  • the preset rule includes: the plurality of sub-regions are based on the horizontal centerline and / or vertical centerline of the fingerprint detection area For the axis, symmetrical distribution.
  • the preset rule includes: the area of each of the plurality of sub-regions is equal.
  • the fingerprint identification module (4000) further includes a processing unit (4100) and an optical detection unit, and the processing unit (4100) It is used to determine the intensity of the return light passing through the fingerprint detection area (2100) by the optical detection unit, and the return light is irradiated on the fingerprint detection area (2100) by the fingerprint identification light source (5000) The light reflected after touching the operated object; according to the intensity of the returned light, determine whether the touch operation is valid; if the touch operation is valid, perform a fingerprint on the touch operation through the fingerprint recognition module (4000) Identify.
  • the processing unit (4100) is further configured to: if the intensity of the returned light is greater than or equal to the preset intensity, determine The touch operation is effective.
  • the terminal device further includes a light sensor (1900), and the processing unit (4100) is further configured to: if the returned light The light intensity is greater than or equal to the preset light intensity, and the light sensor is not blocked, and it is determined that the touch operation is effective.
  • the processing unit (4100) is further configured to: determine whether the object is a living body according to the intensity of the returned light; If the object is a living body, it is determined that the touch operation is valid.
  • the terminal device further includes a light sensor (1900), and the processing unit (4100) is further configured to: according to the returned light Determines whether the object is a living body; if the object is a living body and the light sensor is not blocked, it is determined that the touch operation is effective.
  • the processing unit (4100) is further configured to: if the intensity of the returned light is greater than or equal to the preset intensity, according to The intensity of the returned light determines whether the object is a living body; if the object is a living body, it is determined that the touch operation is effective.
  • the terminal device further includes a light sensor (1900), and the processing unit (4100) is further configured to: if the returned light The light intensity is greater than or equal to the preset light intensity, and the light sensor is not blocked, according to the light intensity of the returned light, determine whether the object is a living body; if the object is a living body, determine that the touch operation is effective .
  • the optical detection unit is a photodiode.
  • the processing unit (4100) is further configured to: adjust the measurement range of the photodiode according to the intensity of the returned light .
  • the processing unit (4100) is further configured to: control the fingerprint identification light source (5000) to emit light according to the modulation frequency, and The return light is demodulated; the optical intensity of the demodulated return light is determined by the optical detection unit.
  • the light used for fingerprint detection can be transmitted through It is transmitted to the fingerprint recognition module through the backlight module, which solves the problem of optical fingerprint detection under the LCD screen, and does not affect the original display effect of the LCD.
  • the light compensation component of the backlight module film after the special treatment is compensated for by setting the fill light component, or it can also be arranged in the fingerprint detection area
  • the virtual button can be used as an indication of the fingerprint pressing area, and can also reduce the fill light requirement of the fingerprint detection area.
  • the lower fingerprint detection area is set to The black non-displayable area can further reduce the fill light requirement, thereby reducing the cost of fill light.
  • the interference problem of strong light on the fingerprint detection in the environment is solved, and the interference of the visible light emitted by the backlight in the LCD on the fingerprint detection is effectively avoided.
  • a method for fingerprint identification is provided, the method is performed by a terminal device in the first aspect or any possible implementation manner of the first aspect, the touch screen includes a fingerprint detection area, the The fingerprint detection area includes a plurality of sub-areas, the method includes: determining whether the plurality of sub-areas have touch data according to a touch operation in the fingerprint detection area; determining the touch according to whether the plurality of sub-areas have touch data Whether the operation is valid; if the touch operation is valid, perform fingerprint recognition on the touch operation through the fingerprint recognition module.
  • the determining whether the touch operation is valid according to whether the multiple sub-regions have touch data includes: if the multiple sub-regions have touch data The number of sub-regions is greater than or equal to a preset value, and it is determined that the touch operation is valid.
  • the terminal device further includes a light sensor, and the determining whether the touch operation is based on whether the plurality of sub-regions has touch data Valid, including: if the number of sub-regions with touch data in the plurality of sub-regions is greater than or equal to a preset value, and the light sensor is not blocked, determine that the touch operation is valid.
  • the determining whether the touch operation is valid according to whether the multiple sub-regions have touch data includes: Each sub-region in the region has touch data, and it is determined that the touch operation is valid.
  • the terminal device further includes a light sensor, and the determining whether the touch operation is effective according to whether the plurality of sub-regions has touch data Including: if each of the plurality of sub-regions has touch data, and the light sensor is not blocked, determining that the touch operation is valid.
  • the method further includes: determining the position according to the position of each sub-region and each time when touch data is acquired together The form of the touch operation, different forms correspond to different applications; if the touch operation is valid, after the fingerprint recognition of the touch operation by the fingerprint recognition module is successful, the operation corresponding to the form of the touch operation is executed. application.
  • the multiple sub-regions are distributed on the fingerprint detection region according to a preset rule.
  • the preset rule includes: any two sub-regions in the plurality of sub-regions do not overlap.
  • the preset rule includes: the plurality of sub-regions are based on the horizontal centerline and / or vertical centerline of the fingerprint detection area For the axis, symmetrical distribution.
  • the preset rule includes: the area of each sub-region in the plurality of sub-regions is equal.
  • a plurality of sub-regions are set in the fingerprint detection area of the terminal device, and it is determined whether the touch operation is valid according to whether the multiple sub-regions have valid touch data, and when the touch operation is valid Perform fingerprint recognition, so that when the touch screen triggers the unlocking of the fingerprint in the locked or black screen state, the false judgment rate is lower, the recognition is faster, the anti-interference ability to the ambient light is stronger, and the speed and efficiency of fingerprint recognition are improved.
  • a method for fingerprint recognition is improved.
  • the method is performed by a terminal device in the first aspect or any possible implementation manner of the first aspect, and the touch screen includes a fingerprint detection area.
  • the fingerprint identification module includes an optical detection unit, and the method includes: determining, by the optical detection unit, the intensity of the return light passing through the fingerprint detection area, the return light being the fingerprint identification light source irradiated on the fingerprint detection The light reflected by the object performing the touch operation in the area; according to the intensity of the returned light, it is determined whether the touch operation is valid; if the touch operation is valid, the fingerprint recognition module performs fingerprint recognition on the touch operation .
  • the determining whether the touch operation is effective according to the light intensity of the return light includes: if the light intensity of the return light is greater than or equal to a preset The light intensity determines that the touch operation is valid.
  • the terminal device further includes a light sensor, and the determining whether the touch operation is effective according to the light intensity of the returned light, The method includes: if the intensity of the returned light is greater than or equal to the preset intensity, and the light sensor is not blocked, determining that the touch operation is effective.
  • the determining whether the touch operation is effective according to the light intensity of the return light includes: according to the light of the return light Strong, determine whether the object is a living body; if the object is a living body, determine that the touch operation is valid.
  • the terminal device further includes a light sensor, and the determining whether the touch operation is effective according to the light intensity of the returned light, The method includes: determining whether the object is a living body according to the intensity of the returned light; if the object is a living body and the light sensor is not blocked, determining that the touch operation is effective.
  • the determining whether the touch operation is effective according to the light intensity of the return light includes: if the light of the return light It is stronger than or equal to the preset light intensity, and it is determined whether the object is a living body according to the light intensity of the returned light; if the object is a living body, it is determined that the touch operation is effective.
  • the terminal device further includes a light sensor, and the determining whether the touch operation is effective according to the light intensity of the returned light, It includes: if the light intensity of the returned light is greater than or equal to the preset light intensity, and the light sensor is not blocked, determine whether the object is a living body according to the light intensity of the returned light; if the object is a living body To determine that the touch operation is valid.
  • the optical detection unit is a photodiode.
  • the method further includes: adjusting the measurement range of the photodiode according to the intensity of the returned light.
  • the method further includes: controlling the fingerprint identification light source to emit light according to a modulation frequency, and demodulating the return light;
  • the determining the light intensity of the return light passing through the fingerprint detection area by the optical detection unit includes: determining the light intensity of the return light after demodulation by the optical detection unit.
  • the method for fingerprint recognition integrates the photo-diode capable of in vivo detection and the fingerprint image sensor in the optical fingerprint recognition module, so that the optical fingerprint recognition module can be based on the detected light intensity Determine whether there is a finger press, that is, judge the finger press in the lock screen state, and also use the Photo Diode to detect whether it is a living fingerprint to realize the living fingerprint recognition function, thereby verifying the user's true identity through fingerprint, blood flow and heart rate signal , Make fake fingerprints nowhere to escape, escort the security of mobile payment, and greatly improve the security of fingerprint detection.
  • a liquid crystal display screen applied to a liquid crystal panel and a backlight module.
  • the fingerprint identification device includes a light source and a fingerprint identification module; wherein the light source is used to provide an optical signal to illuminate a finger to generate Return light, which is used to pass through the liquid crystal panel and the fingerprint detection light transmission area of the backlight module and transmitted to the fingerprint identification module; the fingerprint identification module is used to Below the fingerprint detection light-transmitting area, used to receive the return light passing through the fingerprint detection light-transmitting area, and obtain a fingerprint image according to the return light, the fingerprint image is used by the fingerprint recognition device to perform the fingerprint recognition .
  • the fingerprint identification module further includes a processing unit configured to: control the light source to emit light according to a modulation frequency and perform the return light Demodulation processing; acquiring the fingerprint image of the finger according to the demodulated return light.
  • the light source and the liquid crystal panel are not blocked from each other.
  • the light source is fixed below the glass cover plate by optical glue.
  • the angle between the light emitting plane of the light source and the surface of the glass cover (1000) is not zero.
  • the light emitted by the light source is infrared light.
  • the display area of the liquid crystal panel includes: a fingerprint detection area, and the fingerprint detection area is used for: In the fingerprint identification, the light emitted by the light source illuminating the return light generated by the finger is transmitted to the fingerprint identification module through the fingerprint sensing area.
  • the fingerprint detection area overlaps with virtual keys in the display area of the liquid crystal panel.
  • the fingerprint detection area includes multiple sub-areas
  • the fingerprint identification module further includes a processing unit, and the processing unit is used to: According to the touch operation in the fingerprint detection area, determine whether the plurality of sub-areas have touch data; according to whether the plurality of sub-areas have touch data, determine whether the touch operation is valid; if the touch operation is valid, pass the The fingerprint recognition module performs fingerprint recognition on the touch operation.
  • the processing unit is further configured to: if the number of sub-regions with touch data in the plurality of sub-regions is greater than or equal to the pre- Set the value to determine that the touch operation is valid.
  • the fingerprint identification device further includes a light sensor
  • the processing unit is further configured to: if there is touch data in the multiple sub-regions The number of sub-regions is greater than or equal to a preset value, and the light sensor is not blocked, it is determined that the touch operation is valid.
  • the processing unit is further configured to: if each of the plurality of sub-regions has touch data, determine the touch operation effective.
  • the fingerprint identification device further includes a light sensor
  • the processing unit is further configured to: if each of the plurality of sub-regions Both have touch data, and the light sensor is not blocked, and it is determined that the touch operation is valid.
  • the processing unit is further configured to determine according to the position of each sub-region and each time when touch data is acquired together
  • the form of the touch operation different forms correspond to different application programs; if the touch operation is valid, after the fingerprint recognition of the touch operation by the fingerprint recognition module is successful, the operation and the form of the touch operation are executed Corresponding application.
  • any two sub-regions of the plurality of sub-regions do not overlap and the areas of the plurality of sub-regions are equal;
  • the horizontal centerline and / or the vertical centerline of the fingerprint detection area are axes, and are symmetrically distributed.
  • the fingerprint identification module further includes a processing unit and an optical detection unit, the processing unit is configured to: pass the optical detection unit Determine the intensity of the return light passing through the fingerprint detection area, the return light being light reflected by the light source after illuminating an object performing a touch operation in the fingerprint detection area; according to the intensity of the return light, determine Whether the touch operation is valid; if the touch operation is valid, perform fingerprint recognition on the touch operation through the fingerprint recognition module.
  • the fingerprint identification device further includes a light sensor
  • the processing unit is further configured to: if the light of the returned light is stronger than or It is equal to the preset light intensity, and the light sensor is not blocked, and it is determined that the touch operation is valid.
  • the processing unit is further configured to: if the intensity of the returned light is greater than or equal to the preset intensity, according to the return The light intensity of the light determines whether the object is a living body; if the object is a living body, it is determined that the touch operation is effective.
  • the fingerprint identification device further includes a light sensor
  • the processing unit is further configured to: if the light of the returned light is stronger than or Is equal to the preset light intensity, and the light sensor is not blocked, and it is determined whether the object is a living body according to the light intensity of the returned light; if the object is a living body, it is determined that the touch operation is valid.
  • the optical detection unit is a photodiode.
  • the processing unit is further configured to: adjust the measurement range of the photodiode according to the light intensity of the returned light.
  • FIG. 1 is a schematic diagram of a terminal device with a fingerprint recognition function according to an embodiment of the present application.
  • FIG. 2 is another schematic diagram of a terminal device with a fingerprint recognition function according to an embodiment of the present application.
  • FIG. 3 is a partial schematic diagram of a terminal device with a fingerprint recognition function according to an embodiment of the present application.
  • FIG. 4 is a plurality of schematic diagrams of a terminal device with a fingerprint recognition function according to an embodiment of the present application.
  • FIG. 5 is two schematic diagrams of a terminal device with a fingerprint recognition function according to an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a processing unit in a terminal device according to an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of a method for fingerprint recognition according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • FIG. 9 is another schematic flowchart of a method for fingerprint recognition according to an embodiment of the present application.
  • FIG. 10 is another schematic flowchart of a method for fingerprint recognition according to an embodiment of the present application.
  • FIG. 11 is yet another schematic flowchart of a method for fingerprint recognition according to an embodiment of the present application.
  • FIG. 12 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • FIG. 13 is a schematic block diagram of an optical fingerprint recognition module of a terminal device according to an embodiment of the present application.
  • FIG. 14 is yet another schematic flowchart of a method for fingerprint recognition according to an embodiment of the present application.
  • 15 is yet another schematic flowchart of a method for fingerprint recognition according to an embodiment of the present application.
  • the off-screen fingerprint recognition technology refers to installing the fingerprint recognition module (such as the fingerprint recognition module) under the display screen, so as to realize the fingerprint recognition operation in the display area of the display screen, without the need for other than the display area on the front of the electronic device Area setting fingerprint collection area.
  • the fingerprint recognition technology under the optical screen uses the light returned from the top surface of the display component of the device to perform fingerprint sensing and other sensing operations.
  • the returned light carries information of an object (such as a finger) that is in contact with the top surface.
  • a specific optical sensor module located below the display screen is realized.
  • the design of the optical sensor module may be to achieve the desired optical imaging by appropriately configuring the optical elements for collecting and detecting the returned light.
  • FIG. 1 shows a schematic diagram of a terminal device 10000 with a fingerprint recognition function according to an embodiment of the present application.
  • FIG. 1 is a side view of the terminal device 10000, that is, the left side of FIG. 1 corresponds to the top of the terminal device. The right side of this FIG. 1 corresponds to the bottom end of the terminal device.
  • the terminal device 10000 includes a glass cover 1000, a liquid crystal panel 2000, a backlight module 3000, a fingerprint recognition module 4000, and a fingerprint recognition light source 5000.
  • the glass cover 1000 is located on the uppermost layer of the terminal device 10000, which is the surface of the terminal device 10000, and is used to provide a touch operation interface for the user, and the terminal device 10000 is controlled by the touch operation. Provides a touch interface for fingerprint recognition of fingers.
  • the glass cover plate 1000 may be specifically a transparent cover plate, such as a glass or sapphire cover plate, which covers the front surface of the terminal device 10000, and a protective layer may also be provided on the surface of the glass cover plate 1000.
  • the liquid crystal panel 2000 in the embodiment of the present application is located under the glass cover 1000 and is used to display images.
  • the liquid crystal panel 2000 may be an LCD screen or other passive light-emitting display screen, which is not limited in the embodiments of the present application.
  • the liquid crystal panel 2000 may be a touch display screen, which can not only display pictures, but also detect the user's touch or press operation, thereby providing a human-machine interaction interface for the user.
  • the terminal device 10000 may include a touch sensor, and the touch sensor may be specifically a touch panel (Touch Panel, TP), which may be provided on the surface of the liquid crystal panel 2000, or may be partially integrated or integrally integrated into the liquid crystal panel 2000, thereby Form a touch screen.
  • Touch Panel Touch Panel
  • the liquid crystal panel 2000 is located below the glass cover 1000, and the so-called finger pressing may actually refer to the finger pressing the glass cover 1000 above the liquid crystal panel 2000 or the protective layer covering the glass cover 1000 surface.
  • the fingerprint recognition light source 5000 in the embodiment of the present application is located below the glass cover 1000 and is used to emit light and illuminate the finger touching the glass cover. The light is reflected by the finger to generate return light, which is used for fingerprint recognition.
  • the fingerprint identification light source 5000 may be disposed below the glass panel 1000 and not blocked from the liquid crystal panel 2000.
  • the fingerprint identification light source 5000 is located at the bottom edge of the liquid crystal panel 2000, or, The fingerprint recognition light source 5000 may be located at other positions around the liquid crystal panel 2000.
  • the fingerprint identification light source 5000 may use infrared light as a light source. On the one hand, it is to avoid interference from the visible light of the LCD display screen. On the other hand, infrared light is not visible to the naked eye, and does not affect the LCD display. Specifically, the infrared light source may use a light emitting diode (Light Emitting Diode, LED), a vertical cavity surface emitting laser (Vertical Cavity, Surface Emitting Laser, VCSEL), a laser diode (Laser Diode), etc. The embodiments of the present application are not limited to this .
  • FIG. 2 shows another schematic diagram of a terminal device 10000 with a fingerprint recognition function according to an embodiment of the present application, which is consistent with the direction of FIG. 1, and FIG. 2 is also a side view of the terminal device 10000, that is, the left side of FIG. 2 corresponds to the terminal The top end of the device, the right side of the figure 2 corresponds to the bottom end of the terminal device. As shown in FIG.
  • the fingerprint recognition light source 5000 is fixed under the glass cover 1000 by optical glue 5001, wherein the optical refractive index of the optical glue 5001 is the same as or similar to that of the glass cover 1000, thereby reducing the fingerprint recognition light source 5000
  • the proportion of the emitted light reflected off the lower surface of the glass cover 1000 improves the utilization rate of the light source, so that the light emitted by the fingerprint recognition light source 5000 can shine more on the finger.
  • FIG. 3 shows a partial schematic diagram of a terminal device 10000 with a fingerprint recognition function according to an embodiment of the present application.
  • FIG. 3 is two positional relationships between a fingerprint recognition light source 5000 and a glass cover 1000.
  • the luminous plane of the fingerprint recognition light source 5000 is parallel to the surface of the glass cover 1000, such as the lower diagram in FIG. 3, assuming here
  • the fingerprint identification light source 5000 is a rectangular block, and its light emitting surface is the upper surface of the rectangular block.
  • the fingerprint identification light source 5000 and the glass cover 1000 are fixed by an optical glue 5001, and the two are parallel to each other.
  • the advantage of flat paste is that it is easier to assemble and the structural tolerances are better controlled, but the disadvantage is that half of the light will be emitted away from the fingerprint recognition module 4000, which affects the light utilization rate.
  • the fingerprint recognition light source 5000 can be tilted at a certain angle toward the fingerprint recognition module 4000 for obliquely attaching, that is, the upper figure in FIG. 3, the light emitting plane of the fingerprint recognition light source 5000 and the glass cover 1000
  • the angle between the surfaces is not 0, and the fingerprint recognition light source 5000 is generally fixed by optical glue 5001, but the disadvantage of this fitting method is that it is more difficult to assemble. Therefore, the choice of specific bonding methods should be set according to the actual situation.
  • the shape of the fingerprint recognition light source 5000 may be a single independent one, or a plurality of bands.
  • FIG. 4 shows a plurality of schematic diagrams of a terminal device 10000 with a fingerprint recognition function according to an embodiment of the present application.
  • FIG. 4 is a top view of the terminal device 10000, that is, each figure in FIG. 4 shows the terminal device 10000 s surface.
  • the fingerprint recognition light source 5000 in the remaining three pictures is in a single independent form, and adopts a left-right symmetric layout, so that you can take care of your fingers on the LCD screen.
  • the fingerprint detection effect under different angles of pressing may not use a symmetrical layout, or a larger number of fingerprint recognition light sources 5000 may be used, thereby increasing the amount of fingerprint detection signals.
  • the fingerprint recognition light source 5000 forms a band-shaped light source, but the embodiments of the present application are not limited thereto.
  • the backlight module 3000 in the embodiment of the present application is located below the liquid crystal panel 2000, and is used to provide a light source for the liquid crystal panel 2000 to display an image, so that the liquid crystal panel 2000 can display an image to a user through the glass cover 1000 on the surface.
  • the backlight module 3000 may be a multi-layer structure including a light guide plate 3200 (in order to distinguish it from light guide plates provided at other locations, hereinafter referred to as a first light guide plate 3200) and a non-light guide plate structure 3100
  • the non-light guide plate structure 3100 may be a one-layer or multi-layer structure.
  • special treatment is required for the backlight module 3000, that is, the non-light guide plate structure 3100 includes a fingerprint detection light transmission area 3101, and the fingerprint detection light transmission area 3101 It is used to transmit the returned light reflected by the finger, and the returned light is used for fingerprint identification.
  • the fingerprint detection transparent area 3101 refers to the fingerprint detection transparency included in each layer structure Light area.
  • the structure of the non-light guide plate of the backlight module 3000 may include at least one of the following layers: a composite film 3110, a light-enhancing film 3120, a diffusion film 3130, and a reflective film 3140 (in order to distinguish it from reflective films provided at other locations, hereinafter referred to as The first reflective film 3140) and the steel plate 3150.
  • the backlight module 3000 of the terminal device 10000 has a multilayer structure, in addition to the first light guide plate 3200 in the middle, from top to bottom, it also includes: a composite film 3110, a light-enhancing film 3120, and a diffusion film 3130, a first reflective film 3140 and a steel plate 3150.
  • the light source of the backlight module 3000 is further included at the edge of the first light guide plate 3200.
  • the light source may be disposed at the bottom edge of the first light guide plate 3200, that is, to the right of the first light guide plate 3200 in FIG.
  • the light source may be a point light source or a line light source.
  • the first light guide plate 3200 transmits the light of the light source to form a surface light source to illuminate the corresponding entire liquid crystal panel 2000.
  • a first reflective film 3140 As shown in FIG. 2, below the first light guide plate 3200 is a first reflective film 3140. Since the first light guide plate 3200 propagates the light source up and down, the liquid crystal panel 2000 is located on the first light guide plate 3200. Above, in order to improve the utilization rate of light, the first reflection film 3140 can reflect the light propagating downward from the first light guide plate 3200 back to be transmitted upward to illuminate the liquid crystal panel 2000 to improve the light utilization rate. Since the first reflective film 3140 is opaque, fingerprint detection cannot be achieved.
  • the first reflective film 3140 includes a fingerprint identification light-transmitting area 3141, which corresponds to the fingerprint identification module 4000
  • the location of the fingerprint identification module 4000 may include an optical sensor, the fingerprint identification transparent area 3141 specifically corresponds to the position of the optical sensor, the fingerprint identification transparent area 3141 may be the first reflective film 3140 A through hole on the top, or a song area on the first reflective film 3140 may be filled with optical ink to form the fingerprint identification light-transmitting area 3141, wherein the optical characteristics of the filled optical ink are the same as the first reflective film 3140 Or similar to reduce the impact on the image displayed on the liquid crystal panel 2000.
  • the steel plate 3150 As shown in FIG. 2, below the first reflective film 3140 is a steel plate 3150, which serves to protect and support its superstructure. Since the steel plate 3150 is opaque, fingerprint detection cannot be achieved. In order to effectively detect fingerprints, the steel plate 3150 includes a fingerprint identification light-transmitting area 3151, which corresponds to the position of the fingerprint identification module 4000. For example, the The fingerprint identification light-transmitting area 3151 specifically corresponds to the position of the optical sensor in the fingerprint identification module 4000. The fingerprint identification light-transmitting area 3151 may be a through hole in the steel plate 3150.
  • the diffusion film 3130 has a uniform light effect on the light passing through it, and can also filter the defects of the light passing through the first light guide plate 3200.
  • the current diffusion film 3130 has haze for both visible light and infrared light. If the fingerprint detection light source 5000 is infrared light, in order to effectively transmit the infrared light of the detection fingerprint, special improvements are made to it, the specific processing method and the first reflection Similar to the film 3140, the diffusion film 3130 is provided with a fingerprint identification light-transmitting area 3131 corresponding to the position of the fingerprint identification module 4000.
  • the fingerprint identification light-transmitting area 3131 specifically corresponds to the fingerprint identification
  • the location of the optical sensor in the module 4000, the fingerprint identification transparent area 3131 may be a through hole on the diffusion film 3130, or an area of the diffusion film 3130 may be filled with optical ink to form the fingerprint identification transparency
  • the optical characteristics of the filled optical ink are the same as or similar to those of the diffusion film 3130, so as to reduce the influence on the image displayed by the liquid crystal panel 2000.
  • the diffusion film 3130 is a light enhancement film 3120, which can increase the intensity and brightness of light in a specific direction.
  • Most of the current light enhancement film 3120 uses a physical prism to increase light, so Fingerprint detection is a hindrance.
  • the specific processing method is similar to the first reflective film 3140.
  • the gloss enhancement film 3120 is provided with a fingerprint identification light-transmitting area 3121.
  • the fingerprint identification light-transmitting area 3121 corresponds to the fingerprint identification mode.
  • the position of the group 4000, for example, the fingerprint identification transparent area 3121 specifically corresponds to the position of the optical sensor in the fingerprint identification module 4000.
  • the fingerprint identification transparent area 3121 may be a through hole on the light enhancement film 3120, or An area of the optical enhancement film 3120 may be filled with optical ink to form the fingerprint identification light-transmitting area 3121, wherein the optical characteristics of the optical ink filled are the same as or similar to the optical enhancement film 3120 to reduce the image displayed on the liquid crystal panel 2000 Impact.
  • the light-enhancing film 3120 is a composite film 3110, which has an angle-constraining property for light and is not conducive to fingerprint detection, so it is improved.
  • the specific processing method is similar to that of the first reflective film 3140.
  • the composite film 3110 is provided with a fingerprint identification light-transmitting area 3111 corresponding to the position of the fingerprint identification module 4000.
  • the fingerprint identification light-transmitting area 3111 specifically corresponds to the optical The location of the sensor, the fingerprint identification light-transmitting area 3111 may be a through hole on the composite film 3110, or an area of the composite film 3110 may be filled with optical ink to form the fingerprint identification light-transmitting area 3111, wherein, The optical characteristics of the filled optical ink are the same as or similar to the composite film 3110 to reduce the effect on the liquid crystal panel 2000 displaying images.
  • the fingerprint detection light-transmitting area 3101 included in the non-light guide plate structure 3100 in the embodiment of the present application may correspond to the aforementioned fingerprint detection light-transmitting areas 3111, 3121, 3131, 3141, and 3151.
  • the size of the fingerprint detection light-transmitting areas 3111, 3121, 3131, 3141, and 3151 of each film layer in the embodiments of the present application may be set according to actual applications.
  • the uppermost layer in FIG. 2 is a composite film 3110, and the size of the fingerprint detection light-transmitting area 3111 of the composite film 3110 can be identified according to the fingerprint below
  • the field of view (FOV) of the module 4000 is set, wherein the fingerprint recognition module 4000 includes an optical sensor, and the optical sensor may include a lens.
  • the FOV of the fingerprint recognition module 4000 here refers to It is the FOV of the lens, that is, as shown in FIG. 2, the size of the fingerprint detection light-transmitting area 3111 is set to the angle ⁇ corresponding to the FOV of the fingerprint recognition module 4000.
  • the opening size at the composite film 3110 may be the same or similar
  • the fingerprint detection light transmitting area 3111 of the composite film 3110 may be a through hole or an area filled with optical ink, and the size of the through hole or the area filled with optical ink may be equal to or slightly larger than that of the fingerprint recognition module 4000
  • the opening size of the composite film 3110 corresponding to the angle ⁇ of FOV.
  • the size of the fingerprint detection transparent area of each layer structure under the composite film 3110 can also be set at the size of each layer according to the angle ⁇ corresponding to the FOV, that is, the fingerprint detection of each layer structure under the composite film 3110
  • the size of the light-transmitting area can be reduced in order from the top to the bottom according to the opening size of the angle ⁇ corresponding to the FOV of the fingerprint recognition module 4000; or, considering the effect of the top view of each layer structure, you can also
  • the size of the fingerprint detection light transmission area of each layer structure under the composite film 3110 is set to be slightly larger than the fingerprint detection light transmission area 3111, so that only the fingerprint detection light transmission of the composite film 3110 can be seen from the upper surface of the terminal device 10000 The edge of the area 3111, without seeing other edges, makes the surface of the terminal device 10000 have a better visual effect.
  • the fingerprint detection transparent area of each layer structure under the composite film 3110 may be a through hole, then each The through holes of the layer structure are equal from top to bottom or increase in sequence, or the fingerprint detection light-transmitting area of each layer structure under the composite film 3110 may also be filled optical Ink region, size of the area of each layer of ink may be filled from the optical equal in order to increase or lower.
  • the fingerprint identification module 4000 in the embodiment of the present application is located below the fingerprint detection light-transmitting area 3101, and is used to receive the return light passing through the fingerprint detection light-transmitting area 3101, and obtain a fingerprint image according to the return light. The fingerprint image is used to The terminal device 10000 performs fingerprint identification.
  • the optical ink used in the embodiments of the present application has wavelength selectivity and has a good transmittance to the light emitted by the fingerprint identification light source (5000), for example, the fingerprint identification light source (5000) emits infrared light, then The optical ink filled in the fingerprint detection light transmission area of each layer has a good transmittance for infrared light.
  • the fingerprint identification module 4000 in the embodiment of the present application is located below the fingerprint detection light-transmitting area 3101, and is used to receive the return light passing through the fingerprint detection light-transmitting area 3101, and perform fingerprint identification on the finger according to the return light.
  • the fingerprint identification module 4000 may be specifically an optical fingerprint identification module, which is mainly used to collect fingerprint information (such as fingerprint image information) of a user.
  • the fingerprint identification module 4000 in the embodiment of the present application may further be provided with a circuit board, such as a flexible printed circuit (Flexible Printed Circuit, FPC), and the fingerprint identification module 4000 may be soldered to the circuit through a pad Board, and realize electrical interconnection and signal transmission with other peripheral circuits or other components of the terminal device 10000 through the circuit board.
  • the fingerprint recognition module 4000 can receive the control signal of the processing unit of the terminal device 10000 through the circuit board, and can also output the fingerprint detection signal or fingerprint image to the processing unit or control of the terminal device 10000 through the circuit board Unit etc.
  • a position of the surface of the terminal device 10000 corresponding to the fingerprint recognition module 4000 has a fingerprint detection area
  • the fingerprint detection area is a specific area on the display screen of the terminal device 10000, namely
  • the fingerprint detection area is a specific area of the liquid crystal panel 2000.
  • the fingerprint detection area can be extended to half a display area or even the entire display area, thereby realizing half-screen or full-screen fingerprint detection.
  • the fingerprint detection area of the fingerprint identification module 4000 on the liquid crystal panel 2000 is at least partially located in the display area of the liquid crystal panel 2000.
  • the fingerprint detection area 2100 is entirely located in the display area of the liquid crystal panel 2000 Inside.
  • the area of the fingerprint detection area 2100 may be different from the area of the fingerprint identification module 4000.
  • the optical path design such as lens imaging, reflective folding optical path design, or other light convergence or reflection optical path design may make the fingerprint identification module 4000
  • the area of the fingerprint detection area 2100 is larger than the area of the fingerprint recognition module 4000.
  • the fingerprint detection area 2100 of the fingerprint identification module 4000 may also be designed to be consistent with the area of the fingerprint identification module 4000.
  • the fingerprint recognition module 4000 in the embodiment of the present application may specifically include one or more optical sensors; the optical sensors may be arranged side by side, for example, arranged side by side under the fingerprint detection light transmitting area 3101.
  • the area of group 4000 is the area of one or more optical sensors included in it.
  • the fingerprint recognition light source 5000 illuminates the finger and reflects at the finger to form the above-mentioned return light, which can be Carry the fingerprint information of the user's finger. For example, after the light is reflected by the fingerprint on the surface of the user's finger, the reflected light of the ridge and the valley of the finger fingerprint is different, so the reflected return light carries the user's fingerprint information.
  • the terminal device 10000 After the returned light passes through the fingerprint detection area and the fingerprint detection light transmission area 3101 of the backlight module 3000, it is received by the optical sensor of the fingerprint recognition module 4000 underneath it and converted into a corresponding electrical signal, that is, a fingerprint detection signal. Based on the fingerprint detection signal, the terminal device 10000 can obtain the fingerprint information of the user, and can further perform fingerprint matching verification, thereby completing the identity verification of the current user so as to confirm whether it has the authority to perform corresponding operations on the terminal device 10000.
  • the terminal device 10000 Since fingerprint collection and detection can be realized in the fingerprint detection area of the liquid crystal panel 2000, the terminal device 10000 adopting the above structure makes the fingerprint detection area not affect the normal image display of the liquid crystal panel 2000, so no special reservation is required on the front of the terminal device 10000
  • the fingerprint detection area is set in a space, so a full screen solution can be adopted, that is, the display area of the liquid crystal panel 2000 can be basically extended to the entire front of the terminal device 10000.
  • each component in the overall stack of the backlight module 3000 needs to be treated specially, so that the non-light guide plate structure 3100 has a fingerprint identification light transmission area 3101, which will affect the liquid crystal panel
  • the corresponding area of 2000 shows the image effect, so you need to consider how to reduce this effect.
  • the position of the fingerprint identification module 4000 may be set to correspond to that of the liquid crystal panel 2000.
  • the fingerprint detection area overlaps the virtual key area to reduce the impact of fingerprint detection on the image displayed on the liquid crystal panel.
  • FIG. 5 shows two schematic diagrams of a terminal device 10000 with a fingerprint recognition function according to an embodiment of the present application.
  • FIG. 5 is a top view of the terminal device 10000, that is, each figure in FIG. 5 shows the terminal device The surface of 10000, and take the terminal device 10000 as a mobile phone as an example.
  • the surface of the mobile phone shown in FIG. 5 displays virtual buttons 1110, 1120, and 1130.
  • Each virtual button can have different functions. Specific functions can be set according to actual applications. For example, virtual button 1110 can be set to Home button.
  • the dotted frame below the left image in FIG. 5 indicates a possible position of the fingerprint detection area 2100, that is, the fingerprint sensor is located within the dotted frame, and this position does not overlap with the virtual key.
  • the fingerprint detection area 2100 may be set to overlap with any one of the virtual keys 1110, 1120, and 1130.
  • the virtual key 1110 overlaps the fingerprint detection area 2100 and the virtual key 1110 in the left and right images in FIG.
  • the lower position corresponds to the fingerprint recognition module 4000, which can instruct the user to press the fingerprint pressing area, and can also reduce the fill light requirement displayed in the fingerprint detection area 2100.
  • the area where the lower virtual key is located is set to a black or other color non-displayable area, that is, the fingerprint detection area 2100 is also set to a black non-displayable area, which can be further Reduces the fill light requirements, which can reduce the cost of fill light.
  • a fill light device may be added at the position of the fingerprint detection area 2100, that is, a fill light device is provided at a corresponding position of the fingerprint detection transparent area 3101 of the backlight module 3000 to compensate for the backlight mode The light loss of group 3000 after processing.
  • the terminal device 10000 further includes a fill light device 6000 located below the fingerprint detection light-transmitting area 3101 and above the fingerprint recognition module 4000 for detecting the fingerprint light-transmitting area 3101 Perform backlight compensation.
  • the light supplementing device 6000 may include a backlight 6100 and a second light guide plate 6200, the backlight 6100 is located around the second light guide plate 6200, for example, the backlight 6100 is arranged in a center symmetrical layout As shown in FIG. 2, the backlight 6100 is located at both ends of the second light guide plate 6200, and the number of the backlight 6100 may be 2 or more; the second light guide plate 6200 is used to conduct the light emitted by the backlight 6100 .
  • the backlight 6100 can use the same light source as the backlight module 3000, for example, a white LED lamp, which can have substantially the same optical effect, and the compensated light is basically the same as that in the original backlight module 3000.
  • a white LED lamp which can have substantially the same optical effect
  • the compensated light is basically the same as that in the original backlight module 3000.
  • the fill light brightness and the backlight module 3000 are basically the same.
  • the light supplement device 6000 further includes: a second reflective film 6300 located under the backlight 6100 and the second light guide plate 6200 for reflecting toward the fingerprint detection light-transmitting area 3101 The light emitted by the backlight 6100 and the light conducted by the second light guide plate 6200.
  • the second reflective film 6300 may be separated from the second light guide plate 6200 by a separation scheme, or may be coated with the second light guide plate 6200 to form the second reflective film 6300.
  • a through hole 6310 may be provided in the second reflective film 6300, and the through hole 6310 is used to transparently transmit the return light for fingerprint detection to the fingerprint recognition module 4000.
  • the size of the through hole 6310 can be set according to the FOV of the fingerprint identification module 4000 below.
  • the size of the through hole 6310 is set to be the same as the FOV of the fingerprint identification module 4000
  • the corresponding angle ⁇ at the second reflective film 6300 may have the same or similar opening size.
  • a light filter may be provided between the fill light device 6000 and the fingerprint recognition module 4000 7000.
  • the filter 7000 is used to filter out the light transmitted to the fingerprint recognition module 4000 except the return light.
  • the fingerprint detection light source is 5000 digit infrared light
  • infrared light can be used to filter out visible light.
  • the filter is used as the filter 7000, so as to eliminate the interference of the visible light on the LCD screen display and fingerprint detection in the environment.
  • the terminal device 10000 may also include some general components. As shown in FIG. 5, taking the terminal device 10000 as a mobile phone as an example, the mobile phone may further include a light sensor 1900, The earpiece 1800, the non-display area 1700 (that is, the frame portion), the display area 1600 (that is, the area corresponding to the liquid crystal panel 2000), the volume key 1500, and the power key 1400.
  • the embodiments of the present application are not limited thereto.
  • the terminal device 10000 in the embodiment of the present application may further include a processing unit, and the control unit controls the light emitting frequency of the fingerprint recognition light source 5000, thereby shielding the influence of strong light in the environment.
  • FIG. 6 shows a schematic block diagram of a processing unit in a terminal device according to an embodiment of the present application, where the processing unit may be specifically located in the fingerprint recognition module 4000.
  • the processing unit 4100 is used to: control the fingerprint recognition light source 5000 to emit light according to the modulation frequency, and perform demodulation processing on the returned light; according to the demodulated returned light, acquire the fingerprint image of the finger.
  • the processing unit 4100 may include a modulation circuit 4110, and the processing unit 4100 controls the fingerprint recognition light source 5000 to emit light according to a preset modulation frequency through the modulation circuit 4110, that is, the fingerprint recognition light source 5000 may emit an optical signal according to the preset modulation frequency, for example A certain modulation frequency is used to turn on or off.
  • the fingerprint recognition module 4000 receives the returned light after the finger reflection. The returned light still has the modulation frequency.
  • the processing unit 4100 may further include a demodulation circuit 4120 that demodulates the received optical signal and generates a fingerprint image based on the restored optical signal, so that the terminal device 10000 can perform fingerprint recognition based on the fingerprint image . Since most of the light in the environment can be regarded as an optical signal with a constant frequency or a very slow frequency, the modulation method can well shield the influence of strong light in the environment.
  • the processing unit 4100 may further include other circuits.
  • the processing unit 4100 may further include an amplification circuit for amplifying the optical signal or the electrical signal; it may also include a filtering circuit for the optical signal or the The electrical signal is filtered; it may also include an analog-to-digital conversion circuit for converting an analog signal into an electrical signal, or may also include a circuit for other purposes.
  • the embodiments of the present application are not limited thereto.
  • the terminal device with fingerprint recognition function in the embodiment of the present application through special processing on the backlight module, for example, a through hole is provided on the backlight module or the through hole is filled with optical ink, which is used for fingerprint detection
  • the light can be transmitted to the fingerprint recognition module through the backlight module, which solves the problem of optical fingerprint detection under the LCD screen, and does not affect the original display effect of the LCD.
  • the light compensation component of the backlight module film after the special treatment is compensated for by setting the fill light component, or it can also be arranged in the fingerprint detection area
  • the virtual button can be used as an indication of the fingerprint pressing area, and can also reduce the fill light requirement of the fingerprint detection area.
  • the lower fingerprint detection area is set to The black non-displayable area can further reduce the fill light requirement, thereby reducing the cost of fill light.
  • the interference problem of strong light on the fingerprint detection in the environment is solved, and the interference of the visible light emitted by the backlight in the LCD on the fingerprint detection is effectively avoided.
  • FIG. 7 shows a schematic block diagram of a method 100 for fingerprint recognition according to an embodiment of the present application.
  • the method 100 may be performed by a terminal device, which may be the terminal device 200 shown in FIG. 8.
  • the terminal device 200 includes a touch screen 210 and a fingerprint recognition module 220.
  • the touch screen 210 includes fingerprint detection In the area 211, a fingerprint recognition module 200 is correspondingly arranged below the location of the fingerprint detection area 211; the fingerprint detection area 211 includes a plurality of sub-areas, as shown in the lower diagram in FIG. 8, for example, the plurality of sub-areas may be Area of 5 small squares.
  • the terminal device 200 may correspond to the above-mentioned terminal device 10000, that is, the method may be executed by the terminal device 10000, or may be other terminal devices; similarly, the fingerprint identification module 220 of the terminal device 200 may be The optical fingerprint recognition module may be, for example, the above-mentioned fingerprint recognition module 4000 or other fingerprint recognition modules; the touch screen 210 may be an LCD screen, for example corresponding to the above-mentioned glass cover 1000 and / or liquid crystal panel 2000, or It may be other planes, such as an OLED screen; the fingerprint identification area 211 may correspond to the fingerprint identification area 2100 described above, but the embodiments of the present application are not limited thereto.
  • the method 100 includes: S110, determining whether the plurality of sub-regions have touch data according to the touch operation in the fingerprint detection area; S120, determining whether the touch operation is based on whether the plurality of sub-regions have touch data Valid; S130, if the touch operation is valid, perform fingerprint recognition on the touch operation through the fingerprint recognition module.
  • the touch operation in the fingerprint detection area may be the touch operation of the user's finger, for example, the effective touch operation when the user needs to unlock the mobile phone, or the user's unintentionally invalid touch operation; or, the touch operation in the fingerprint detection area It may also be an invalid touch operation caused by a wrong touch of another object, and the terminal device needs to determine whether the touch operation is effective.
  • each of the multiple sub-areas in the fingerprint detection area may be determined to have touch data. For any sub-area, if the sub-area is detected If the data is touched, the sub-region is considered to be touched.
  • whether the sub-region has touch data can be determined in various ways.
  • the fingerprint recognition module 220 is an optical fingerprint recognition module, it can determine whether the sub-region has touch data according to whether light is detected in the sub-region. For example, if the light source of the fingerprint recognition process is infrared light, the sub-region is detected When infrared light is reached, it is determined that there is touch data in the sub-area, or that the touch data in the sub-area is valid, and other detected light cannot determine that there is touch data in the sub-area, that is, the touch data in the sub-area is invalid .
  • the intensity and / or brightness of the light detected in the sub-area determine whether the sub-area has touch data, for example, when the intensity of the light detected in the sub-area is greater than or a preset intensity, determine that the sub-area has a number If the intensity of the light detected in the sub-region is less than the preset intensity, it is determined that there is no digital-analog data in the sub-region, or the touch data is invalid.
  • the terminal device determines whether the touch operation is valid according to whether the multiple sub-regions have touch data. Specifically, the terminal device may determine whether the touch operation is valid only based on whether the multiple sub-regions have touch data; or the terminal device may combine the multiple sub-regions with touch data and other determination conditions to jointly determine whether the touch operation is valid.
  • the terminal device may determine whether the touch operation is valid only based on whether multiple sub-regions have touch data. Specifically, the terminal device may determine the condition for judging whether the touch operation is valid according to the distribution of the sub-regions. For example, when the number of multiple sub-regions is large, the determination condition is set: if the number of sub-regions with touch data in the multiple sub-regions is greater than or equal to a preset value, the terminal device determines that the touch operation is valid. For another example, if the number of multiple sub-regions is small, the determination condition may be set as: if each of the multiple sub-regions has touch data, it is determined that the touch operation is valid.
  • the method 100 may further include: determining the plurality of sub-regions on the fingerprint detection area according to a preset rule. Specifically, the distribution of the multiple sub-regions determined on the fingerprint detection area 211 may be based on actual applications.
  • the preset rule may include: the shape of any sub-region in the plurality of sub-regions may be any shape, and the shapes of different sub-regions may be the same or different.
  • the following is the same shape and all are square Examples.
  • the preset rule may further include: the sizes of different sub-regions in the plurality of sub-regions may be set to be equal or unequal.
  • the sizes of different sub-regions in the plurality of sub-regions may be set to be equal or unequal.
  • the following uses the same size as an example for description.
  • the preset rule may further include: the distribution of the plurality of sub-regions may be a symmetric distribution, or may be distributed according to a certain ratio and law, or may be a random distribution.
  • the symmetric distribution is used here for It is illustrated that the multiple sub-regions are distributed axisymmetrically, and the symmetry axis includes the horizontal centerline and / or the vertical centerline of the fingerprint detection area.
  • the preset rule may further include: there may be two or more sub-regions in the plurality of sub-regions with overlapping regions, or there may be two or more sub-regions in the plurality of sub-regions that do not overlap at all Distribution, for convenience of description, here is an example in which any two sub-regions in a plurality of sub-regions do not overlap.
  • the preset rule may further include: setting the number of the multiple sub-regions according to actual applications.
  • the fingerprint detection area 211 may be provided with a small number of sub-areas that are more dispersedly distributed. As shown in FIG. 8, five sub-regions are selected on the fingerprint detection area 211, that is, blocks 1-5. Since the number of sub-regions is relatively small, correspondingly, the terminal device may have When valid touch data is determined, it is determined that the corresponding touch operation is valid; and when there is at least one sub-region in the plurality of sub-regions that does not have valid touch data or does not have touch data, it is determined that the corresponding touch operation is invalid.
  • a uniformly distributed sub-area array can be provided on the fingerprint detection area 211, for example, a 3 * 3 sub-area array is provided, which has 9 sub-areas in total. Due to the large number of sub-areas, the terminal device can be located in the multiple sub-areas When the number of sub-areas with valid touch data is greater than or equal to the preset value, it is determined that the corresponding touch operation is valid, otherwise it is invalid, where the preset value can be set according to the actual application, for example, for the above 3 * 3 sub-areas Array, the preset value can be set to 6, 7 or 8.
  • the terminal device may also combine whether multiple sub-regions have touch data and other determination conditions to jointly determine whether the touch operation is valid.
  • the terminal device 200 may further include a light sensor 230 that is located on the surface of the terminal device 200 and used to detect light.
  • the light sensor 230 on the mobile phone is usually provided on the top of the mobile phone, and can be used to detect whether there is an object blocked at the location.
  • the terminal device may combine the detection result of the light sensor 230 with the detection result of the above-mentioned sub-area to determine whether the touch operation is effective. Specifically, if the number of sub-regions with touch data in the plurality of sub-regions is greater than or equal to a preset value, and the light sensor is not blocked, the terminal device determines that the touch operation is valid. Or, if each of the multiple sub-regions has touch data and the light sensor is not blocked, the terminal device determines that the touch operation is valid.
  • the terminal device determines that the touch data in the sub-area is valid, according to the detection result of the light sensor 230, false touches in individual scenes can be excluded. For example, the user puts the mobile phone in the pocket or the mobile phone is held in the user's hand. When the user does not want the fingerprint detection of the mobile phone to be triggered, it is necessary to rule out false touches.
  • the terminal device performs fingerprint recognition on the touch operation through the fingerprint recognition module. If the touch operation is invalid, the terminal device does not perform fingerprint recognition.
  • the terminal device when determining that the touch operation in the fingerprint detection area is valid, the terminal device then obtains the fingerprint image corresponding to the touch operation according to the touch data in the fingerprint detection area, so as to perform fingerprint recognition.
  • the method 100 in the embodiment of the present application may further include: determining the form of the touch operation according to the position of each sub-region and each time when touch data is acquired together, and different forms correspond to different application programs; If the touch operation is valid, after successful fingerprint recognition of the touch operation by the fingerprint recognition module, an application program corresponding to the form of the touch operation is executed.
  • the terminal device may determine the form of the touch operation according to the position of each sub-region and the time when the touch data is acquired, that is, determine the operation form of the finger performing the touch operation, wherein the form of the touch operation or the operation of the finger
  • the form may include sliding from top to bottom or sliding from left to right, and each sliding form may correspond to an application.
  • the fingerprint detection area 211 has five sub-areas shown in FIG. 8, and the touch is determined according to the positions of the five sub-areas and the time sequence of acquiring data for each sub-area recorded by the terminal device
  • the form of the touch operation may include top-down, bottom-up, right-to-left, and left-to-right.
  • Each touch or slide corresponds to an application, for example, self View the phone book from top to bottom, run the camera from bottom to top, return to the previous page from right to left, and so on.
  • the sub-region 1 located on the leftmost side acquires touch data first, the subregions 2, 5, and 4 in the middle are acquired after the subregion 1, and the subregion 3 on the rightmost is acquired last, Then, the form of the touch operation is touch or swipe from left to right.
  • the corresponding application program corresponding to the touch or swipe from left to right is executed. For example, the above-mentioned corresponding phone book is viewed from top to bottom, and then the phone book is run; or if the fingerprint recognition process is further required, the fingerprint recognition is performed after the touch operation is determined to be effective, and the phone book is run after the fingerprint recognition is successful.
  • a plurality of sub-regions are provided in the fingerprint detection area, according to whether the plurality of sub-regions have valid touch data, it is determined whether the touch operation is valid, and fingerprint recognition is performed when the touch operation is valid, In the process of triggering the fingerprint unlocking in the locked or black screen state of the touch screen, the false judgment rate is lower, the recognition is faster, the anti-interference ability of the ambient light is stronger, and the speed and efficiency of fingerprint recognition are improved.
  • FIG. 9 shows another schematic flowchart of a method 300 for fingerprint identification according to an embodiment of the present application.
  • the method 300 may be performed by the terminal device shown in FIG. 8, for example, the terminal device may be a mobile phone.
  • the method 300 includes the following steps.
  • the touch screen of the terminal device has a fingerprint recognition area, and the fingerprint recognition area includes a plurality of sub-areas.
  • the distribution of the multiple sub-regions is similar to that in the method 100, and will not be repeated here.
  • the fingerprint detection area detects a touch operation.
  • the touch operation may be accidental touch or effective touch.
  • S303 Determine whether each sub-area is pressed by a finger. Specifically, it can be determined whether each sub-region has valid touch data according to S120 in the above method 100. If there is, it means that the sub-region has been pressed by a finger, and if not, no finger is pressed.
  • S304 Determine whether the light sensor of the mobile phone is blocked. If the light sensor is not blocked, it is determined that the current touch operation is valid, then continue to execute S305; if the light sensor is blocked, the current touch operation is determined to be a false touch, continue to detect the next touch operation, and continue to execute S303 .
  • S305 start to perform fingerprint recognition.
  • the current touch operation is valid
  • the fingerprint image is acquired according to the touch operation
  • fingerprint identification is performed based on the fingerprint image.
  • FIG. 10 shows yet another schematic flowchart of a method 400 for fingerprint identification according to an embodiment of the present application. As shown in FIG. 10, the method 400 may be performed by the terminal device shown in FIG. 8. The method 400 includes the following steps.
  • the touch screen of the terminal device has a fingerprint recognition area, and the fingerprint recognition area includes a plurality of sub-areas.
  • the distribution of the multiple sub-regions is similar to that in the method 100, and will not be repeated here.
  • the fingerprint detection area detects a touch operation.
  • the touch operation may be accidental touch or effective touch.
  • S403 Determine the touch data of each sub-region, and record the order in which each sub-region is pressed.
  • the time sequence in which each sub-region acquires touch data is the order in which each sub-region is pressed.
  • S404 Determine whether each sub-area is pressed by a finger. Specifically, it can be determined whether each sub-area has valid touch data according to S120 in the above method 100. If yes, it means that the sub-area has been pressed by a finger, and if not, no finger is pressed.
  • S405 Determine the sliding direction of the finger according to the pressed sequence. For example, make sure that your finger slides from left to right.
  • Each sliding direction corresponds to an application, and after determining that the finger slides from left to right, the corresponding application from sliding from left to right is executed, for example, to view the phone book.
  • fingerprint identification can also be performed according to the touch operation, and after successful fingerprint identification, the corresponding application program is run.
  • the navigation function of the mobile phone and other terminal devices can be expanded, and different application programs can be executed accordingly.
  • the terminal device 200 in the embodiment of the present application may further include a processing unit.
  • the processing unit may be located in the fingerprint recognition module 220, and the processing unit may be used to perform the above methods 100, 300, and 400.
  • the processing unit may be used to determine whether the multiple sub-regions have touch data according to the touch operation, and determine whether the touch operation is valid according to whether the multiple sub-regions have touch data. If the touch operation is valid, pass the The fingerprint recognition module performs fingerprint recognition on the touch operation.
  • the processing unit is configured to: if the number of sub-regions with touch data in the plurality of sub-regions is greater than or equal to a preset value, determine that the touch operation is valid.
  • the processing unit is configured to: if the number of sub-regions with touch data in the plurality of sub-regions is greater than or equal to a preset value, and the light sensor is not blocked, determine that the touch operation is valid .
  • the processing unit is configured to: if each of the plurality of sub-regions has touch data, determine that the touch operation is valid.
  • the processing unit is configured to: if each of the plurality of sub-regions has touch data, and the light sensor is not blocked, determine that the touch operation is valid.
  • the processing unit is further configured to record the target acquisition order of the touch data of each sub-region corresponding to the touch operation, and different acquisition orders correspond to different application programs; if the touch operation is valid, the After the fingerprint recognition module performs fingerprint recognition on the touch operation successfully, the target application program corresponding to the target acquisition sequence is executed.
  • the processing unit is configured to determine the multiple sub-regions on the fingerprint detection area according to a preset rule.
  • the preset rule includes: any two sub-regions in the plurality of sub-regions do not overlap.
  • the preset rule includes: the plurality of sub-regions are symmetrically distributed with the horizontal center line and / or the vertical center line of the fingerprint detection area as an axis.
  • the preset rule includes: the area of each sub-region in the plurality of sub-regions is equal.
  • the terminal device in the embodiment of the present application sets multiple sub-areas in its fingerprint detection area, determines whether the touch operation is effective according to whether the multiple sub-areas have valid touch data, and performs fingerprint recognition when the touch operation is effective, so that the touch screen In the process of triggering fingerprint unlocking in the lock screen state or black screen state, the false judgment rate is lower, the recognition is faster, the anti-interference ability to the ambient light is stronger, and the speed and efficiency of fingerprint recognition are improved.
  • the existing conventional fingerprint recognition device only the fingerprint pattern of the object to be detected is recognized, and then compared with the fingerprint pattern recorded in the system. If it is determined that the fingerprint patterns are consistent, it is determined that the fingerprint pattern of the object to be detected passes verification.
  • the fingerprint pattern of the object to be detected By copying the fingerprint pattern of the object to be detected, the fingerprint can be copied on materials such as silicone. Because the copied fingerprint is the same as the fingerprint pattern of the object to be detected, the copied fingerprint can also be verified by the conventional fingerprint recognition device, which brings great hidden danger to the security of the fingerprint recognition application.
  • the embodiment of the present application proposes a method for fingerprint recognition, which integrates a photodiode (PD) capable of heart rate detection into an optical fingerprint recognition module, so that the optical fingerprint recognition module can detect both Heart rate, in turn, can detect light intensity and make other determinations based on light intensity.
  • PD photodiode
  • FIG. 11 shows a schematic flowchart of a method 500 for fingerprint identification according to an embodiment of the present application.
  • the method 500 may be performed by a terminal device, which may be the terminal device 600 shown in FIG. 12, as shown in FIG. 12, the terminal device 600 includes a touch screen 610 and an optical fingerprint recognition module 620, and the touch screen 610 includes fingerprint detection
  • the area 611 is used for finger touch to perform fingerprint detection, and an optical fingerprint recognition module 600 is correspondingly disposed below the position of the fingerprint detection area 611.
  • the terminal device 600 further includes a fingerprint identification light source 630 for emitting light to illuminate an object touching the fingerprint detection area 611, the light is reflected by the object to form return light, and the return light passes through the fingerprint detection area 611 Then transmitted to the optical fingerprint recognition module 620, wherein the fingerprint recognition light source 630 can be set at any position of the terminal device 600, for example, as shown in FIG. 12, the fingerprint recognition light source 630 can be a separately provided light source, located under the mobile phone The position of the frame, but the embodiment of the present application is not limited to this.
  • the terminal device 600 may correspond to the above-mentioned terminal device 10000, that is, the method may be executed by the terminal device 10000, or may be other terminal devices; similarly, the optical fingerprint recognition module 620 of the terminal device 600, For example, it may be the fingerprint identification module 4000 described above;
  • the touch screen 610 may be a liquid crystal screen, for example, corresponding to the glass cover plate 1000 and / or the liquid crystal panel 2000, or other planes, such as an OLED screen, corresponding to the touch screen 610
  • the fingerprint recognition light source 630 may be the above-mentioned fingerprint recognition light source 5000; if the touch screen 610 is a self-luminous display screen such as an OLED screen, the fingerprint recognition light source 630 may be a self-luminous screen, or may be used for other purposes
  • the fingerprint identification area 611 may correspond to the fingerprint identification area 2100, but the embodiments of the present application are not limited thereto.
  • the optical fingerprint recognition module 620 in the embodiment of the present application further includes an optical detection unit, which may be used to measure the intensity of the returned light received by the optical fingerprint recognition module 620, for example, the optical detection
  • the unit can be a photodiode (Photo Diode).
  • the Photo Diode receives the returned light, and outputs different electrical signals according to the intensity of the returned light. According to the output data, the intensity of the returned light can be determined. Further, the Photo Diode can also be used to detect biometrics such as heart rate to determine whether the touched object is a living fingerprint.
  • the method 500 includes: S510, determining, by the optical detection unit, the intensity of the return light passing through the fingerprint detection area, the return light being an object that the fingerprint identification light source illuminates the fingerprint detection area to perform a touch operation Rear reflected light; S520, determines whether the touch operation is valid according to the intensity of the returned light; S530, if the touch operation is valid, performs fingerprint recognition on the touch operation by the fingerprint recognition module.
  • the touch operation in the fingerprint detection area 611 may be the touch operation of the user's finger, for example, the effective touch operation when the user needs to unlock the mobile phone, or the user's unintentionally invalid touch operation; or, the fingerprint detection area 611
  • the touch operation may also be an invalid touch operation caused by the wrong touch of other objects, and the terminal device needs to determine whether the touch operation is valid.
  • FIG. 13 shows a schematic block diagram of an optical fingerprint recognition module 620 in an embodiment of the present application.
  • the optical fingerprint recognition module 620 includes an optical detection unit 621. Therefore, in S510, the terminal The optical fingerprint recognition module 620 of the device receives the returned light and outputs data through the optical detection unit 621, and the intensity of the returned light can be determined according to the data.
  • determining the light intensity of the returned light through the data output from the optical detection unit 621 may include: determining the average value of the light intensity of the returned light, or may also determine the time variation law of the light intensity of the returned light .
  • the optical detection unit 621 can be used to measure the change in the intensity of the returned light, further, the optical detection unit 621 can be specifically a living body detection unit, for example, the optical detection unit 621 can also be used to detect heart rate and other organisms Feature to determine whether the object performing the touch operation is a living body, for example, a living finger or a fake fingerprint model.
  • the optical fingerprint recognition module 620 may further include an adjustment circuit 622, and the adjustment circuit 622 may dynamically adjust the range of the optical detection unit 621.
  • the optical detection unit may be Photo Diode, which adjusts the range of Photo Diode according to the current intensity of the returned light to adapt to the current intensity of the returned light and increase the accuracy of the measurement.
  • the terminal device 600 may further include a processing unit, and the control unit controls the light emitting frequency of the fingerprint recognition light source 630, thereby shielding the influence of strong light in the environment.
  • the processing unit in the terminal device 600 may be specifically located in the optical fingerprint recognition module 620.
  • the optical fingerprint recognition module 620 may include a modulation circuit 623, that is, the control unit may include a modulation circuit 623, and the fingerprint recognition light source 630 is controlled by the modulation circuit 623 to emit light according to a preset modulation frequency, that is, a fingerprint recognition light source 630 can send light signals according to the preset modulation frequency, for example, using a specific modulation frequency to turn on or off.
  • the fingerprint recognition module 620 receives the returned light after the finger reflection, the returned light is still With the preset modulation frequency, in order to obtain a final effective fingerprint signal, the processing unit in the optical fingerprint recognition module 620 may further include a demodulation circuit 623, which demodulates the received optical signal,
  • the optical detection unit 621 measures the intensity of the returned light after demodulation, or, after determining the optical intensity by the optical detection unit 621, demodulates the returned light and generates a fingerprint image based on the restored optical signal to facilitate the terminal device 600 Perform fingerprint identification based on the fingerprint image. Since most of the light in the environment can be regarded as an optical signal with a constant frequency or a very slow frequency, the modulation method can well shield the influence of strong light in the environment.
  • the fingerprint recognition module 620 may further include other circuits, for example, an amplification circuit may be included for amplifying optical signals or electrical signals; and a filter circuit may also be included for optical signals or electrical signals Filtering; it may also include an analog-to-digital conversion circuit for converting an analog signal into an electrical signal, or may also include a circuit for other purposes.
  • an amplification circuit may be included for amplifying optical signals or electrical signals
  • a filter circuit may also be included for optical signals or electrical signals Filtering; it may also include an analog-to-digital conversion circuit for converting an analog signal into an electrical signal, or may also include a circuit for other purposes.
  • the embodiments of the present application are not limited thereto.
  • the terminal device can determine the light intensity of the return light based on the data output by the optical detection unit 621 only, Determine whether the touch operation is valid; or, the terminal device may combine other conditions with the light intensity of the return light determined by the optical detection unit 621 to determine whether the touch operation is valid.
  • the terminal device may determine whether the touch operation is effective based only on the intensity of the returned light determined by the data output by the optical detection unit 621.
  • the terminal device may determine that the touch operation is valid; if it is less than, it is determined that the touch operation is invalid. In this way, whether the touch operation is effective is determined only by the intensity of the light intensity, without further performing operations such as heart rate detection, so that the recognition speed is faster.
  • the optical detection unit can be set as Photo Diode for heart rate detection, it can be determined whether the object performing the touch operation is a living body, if it is a living body, it is determined that the touch operation is effective, this method can avoid the touch operation of non-living fingers, However, the accuracy of judgment of the user's false touch is low.
  • the above determination process can also be combined. If the intensity of the returned light is greater than or equal to the preset intensity, determine whether the object is a living body according to the intensity of the returned light; if the object is a living body, determine the The touch operation is valid, otherwise it is determined that the touch operation is invalid. Combining the above two judgment processes further improves the accuracy of detection and reduces the probability of fingerprint recognition caused by false touch.
  • the terminal device may also combine other conditions with the light intensity of the return light determined by the optical detection unit 621 to jointly determine whether the touch operation is effective.
  • the terminal device 600 may further include a light sensor 640, which is located on the surface of the terminal device 600 and used to detect light.
  • the light sensor 640 on the mobile phone is usually provided on the top of the mobile phone, and can be used to detect whether there is an object blocked at the location.
  • the terminal device 600 can combine the detection result of the light sensor 640 with the measurement result of the returned light intensity to determine whether the touch operation is effective, thereby eliminating false touches in individual scenarios, for example, the user puts the mobile phone in a pocket or the mobile phone Hold it in the user's hand. At this time, the user does not want the fingerprint detection of the mobile phone to be triggered.
  • the intensity of the returned light is greater than or equal to the preset intensity, and the light sensor is not blocked, it is determined that the touch operation is valid, otherwise it is determined that the touch operation is invalid.
  • the intensity of the returned light it is determined whether the object is a living body; if the object is a living body, and the light sensor is not blocked, it is determined that the touch operation is valid, otherwise it is determined that the touch operation is invalid.
  • the light intensity of the returned light is greater than or equal to the preset light intensity, and the light sensor is not blocked, determine whether the object is a living body according to the light intensity of the returned light; if the object is a living body, determine the touch The operation is valid, otherwise it is determined that the touch operation is invalid.
  • the terminal device performs fingerprint recognition on the touch operation through the fingerprint recognition module. If the touch operation is invalid, the terminal device does not perform fingerprint recognition.
  • the terminal device when determining that the touch operation in the fingerprint detection area is valid, the terminal device then obtains the fingerprint image corresponding to the touch operation according to the touch data in the fingerprint detection area, so as to perform fingerprint recognition.
  • the method for fingerprint recognition integrates the photo-diode capable of in vivo detection and the fingerprint image sensor in the optical fingerprint recognition module, so that the optical fingerprint recognition module can be based on the detected light intensity Determine whether there is a finger press, that is, judge the finger press in the lock screen state, and also use the Photo Diode to detect whether it is a living fingerprint to realize the living fingerprint recognition function, thereby verifying the user's true identity through fingerprint, blood flow and heart rate signal , Make fake fingerprints nowhere to escape, escort the security of mobile payment, and greatly improve the security of fingerprint detection.
  • FIG. 14 shows yet another schematic flowchart of a method 700 for fingerprint identification according to an embodiment of the present application.
  • the method 700 may be executed by the terminal device shown in FIGS. 12 and 13, for example, the terminal device may be a mobile phone, and the method 700 includes the following steps.
  • the touch screen of the terminal device has a fingerprint recognition area.
  • the terminal device has an optical fingerprint recognition module.
  • the optical fingerprint recognition module includes an optical detection unit.
  • the optical detection unit is Photo Diode for example.
  • the Photo Diode can be measured by voice. Light intensity, further, heart rate detection is also possible.
  • the terminal may be a terminal device 600 that executes the method 500, and details are not described herein again.
  • the optical fingerprint recognition module includes Photo Diode and a fingerprint image sensor for acquiring fingerprint images.
  • Initializing the optical fingerprint recognition module includes: initializing Photo Diode and initializing the fingerprint image sensor.
  • the fingerprint recognition light source illuminates the object performing the touch operation to generate return light.
  • the return light passes through the fingerprint detection area and is received by the optical fingerprint recognition module.
  • the optical fingerprint recognition module Photo Diode in the group outputs different electrical signals according to the intensity of the returned light, and detects the data output by Photo Diode.
  • S704 Determine whether the light intensity is within the dynamic range of Photo Diode. According to the data obtained at Photo Diode in S703, determine whether the current light intensity is within the dynamic range of Photo Diode. If yes, continue to execute S706; if not, continue to execute S705.
  • S706 Determine whether the finger is pressed. According to the data output from Photo Diode, determine the intensity of the returned light received by the optical fingerprint recognition module. If the intensity of the returned light is greater than or equal to the preset value, the current touch operation is considered to be performed by the finger, that is, there is a finger press, and continue to perform S707; if the intensity of the returned light is less than the preset value, the current touch The operation is a false touch, that is, there is no finger pressing, and S703 is continued.
  • S707 Determine whether the light sensor of the mobile phone is blocked.
  • the fingerprint detection operation is started.
  • the current touch operation is valid
  • the fingerprint image is acquired according to the touch operation
  • fingerprint identification is performed based on the fingerprint image.
  • the method shown in FIG. 13 is used to determine whether to perform fingerprint recognition through the data output from Photo Diode combined with the light sensor on the upper end of the mobile phone, without performing heart rate detection, speeding up the recognition speed, and reducing the false positive rate.
  • FIG. 15 shows yet another schematic flowchart of a method 800 for fingerprint identification according to an embodiment of the present application.
  • the method 800 may be performed by the terminal device shown in FIGS. 12 and 13, for example, the terminal device may be a mobile phone, and the method 800 includes the following steps.
  • the touch screen of the terminal device has a fingerprint recognition area.
  • the terminal device has an optical fingerprint recognition module.
  • the optical fingerprint recognition module includes an optical detection unit.
  • the optical detection unit is Photo Diode for example.
  • the Photo Diode can be measured by voice. Light intensity, further, heart rate detection is also possible.
  • the terminal may be the terminal device 600 that executes the method 500, and details are not described herein again.
  • the optical fingerprint recognition module includes Photo Diode and a fingerprint image sensor for acquiring fingerprint images.
  • Initializing the optical fingerprint recognition module includes: initializing Photo Diode and initializing the fingerprint image sensor.
  • the fingerprint recognition light source illuminates the object performing the touch operation to generate return light.
  • the return light passes through the fingerprint detection area and is received by the optical fingerprint recognition module.
  • the optical fingerprint recognition module Photo Diode in the group outputs different electrical signals according to the intensity of the returned light, and detects the data output by Photo Diode.
  • S804. Determine whether the light intensity is within the dynamic range of Photo Diode. According to the data obtained at Photo Diode in S803, determine whether the current light intensity is within the dynamic range of Photo Diode. If yes, continue to execute S806; if not, continue to execute S805.
  • S805 adjust the dynamic range of Photo Diode to adapt to the current light intensity, improve the accuracy of Photo Diode, and continue to execute S803, waiting for the next touch.
  • S806 Determine whether the finger is pressed. According to the data output from Photo Diode, determine the intensity of the returned light received by the optical fingerprint recognition module. If the intensity of the returned light is greater than or equal to the preset value, the current touch operation is considered to be performed by the finger, that is, there is a finger press, and continue to execute S808; if the intensity of the returned light is less than the preset value, the current touch The operation is a false touch, that is, there is no finger press, and S803 continues to be executed, waiting for the next touch.
  • S808 Detect the heart rate through Photo Diode, and determine the heart rate of the object or user performing the touch operation according to the data output by the Photo Diode.
  • S809 Determine whether it is a living body, and determine whether the current touch operation execution object is the finger of a living person according to the detected heart rate data. If so, continue to execute S810; if not, continue to execute S803, waiting for the next touch.
  • the terminal device can also obtain a fingerprint image according to the touch operation, and perform fingerprint recognition based on the fingerprint image.
  • the method for fingerprint recognition integrates the photo-diode capable of in vivo detection and the fingerprint image sensor in the optical fingerprint recognition module, so that the optical fingerprint recognition module can be based on the detected light intensity Determine whether there is a finger press, that is, judge the finger press in the lock screen state, and also use the Photo Diode to detect whether it is a living fingerprint to realize the living fingerprint recognition function, thereby verifying the user's true identity through fingerprint, blood flow and heart rate signal , Make fake fingerprints nowhere to escape, escort the security of mobile payment, and greatly improve the security of fingerprint detection.
  • the terminal device 600 in the embodiment of the present application may further include a processing unit.
  • the processing unit may be located in the fingerprint recognition module 620, and the processing unit may be used to perform the methods 500, 700, and 800 described above.
  • the processing unit may be used to: determine, by the optical detection unit, the intensity of the return light passing through the fingerprint detection area, which is reflected by the fingerprint recognition light source after irradiating an object performing a touch operation in the fingerprint detection area Light; according to the intensity of the returned light, determine whether the touch operation is valid; if the touch operation is valid, perform fingerprint recognition for the touch operation by the optical fingerprint recognition module.
  • the processing unit is further configured to: if the intensity of the returned light is greater than or equal to the preset intensity, determine that the touch operation is valid.
  • the terminal device further includes a light sensor
  • the processing unit is further configured to: if the light intensity of the returned light is greater than or equal to a preset light intensity, and the light sensor is not blocked, determine the touch The operation is valid.
  • the processing unit is further configured to: determine whether the object is a living body according to the intensity of the returned light; if the object is a living body, determine that the touch operation is valid.
  • the terminal device further includes a light sensor
  • the processing unit is further configured to: according to the intensity of the returned light, determine whether the object is a living body; Is blocked, and the touch operation is determined to be valid.
  • the processing unit is further configured to: if the light intensity of the returned light is greater than or equal to the preset light intensity, determine whether the object is a living body according to the light intensity of the returned light; if the object is Living body, confirm that the touch operation is valid.
  • the terminal device further includes a light sensor
  • the processing unit is further configured to: if the light intensity of the returned light is greater than or equal to the preset light intensity, and the light sensor is not blocked, according to the return The intensity of the light determines whether the object is a living body; if the object is a living body, the touch operation is valid.
  • the optical detection unit is a photodiode.
  • the processing unit is further configured to: adjust the measurement range of the photodiode according to the intensity of the returned light.
  • the processing unit is further configured to: control the fingerprint identification light source to emit light according to the modulation frequency, and perform demodulation processing on the returned light; determine the light of the demodulated returned light by the optical detection unit Strong.
  • the optical fingerprint recognition module includes the processing unit.
  • the terminal device of the embodiment of the present application integrates both the photo-diode capable of in vivo detection and the fingerprint image sensor into the optical fingerprint recognition module of the terminal device, so that the optical fingerprint recognition module can be based on the detected light intensity Determine whether there is a finger press, that is, judge the finger press in the lock screen state, and also use the Photo Diode to detect whether it is a living fingerprint to realize the living fingerprint recognition function, thereby verifying the user's true identity through fingerprint, blood flow and heart rate signal , Make fake fingerprints nowhere to escape, escort the security of mobile payment, and greatly improve the security of fingerprint detection.
  • An embodiment of the present application also provides a fingerprint identification device.
  • the fingerprint identification device may be installed in a terminal device, for example, may be provided in the above-mentioned terminal device 10000.
  • the terminal device includes a liquid crystal display having a liquid crystal panel and a backlight module.
  • the fingerprint identification device includes a light source and a fingerprint identification module; wherein the light source is used to provide an optical signal to illuminate a finger to generate return light, which is used to pass through the liquid crystal panel and the fingerprint detection light transmission area of the backlight module and transmit To the fingerprint recognition module; the fingerprint recognition module is arranged below the fingerprint detection light-transmitting area, used to receive the return light passing through the fingerprint detection light-transmitting area, and obtain a fingerprint image according to the return light, the The fingerprint image is used by the fingerprint identification device to perform the fingerprint identification.
  • the light source is used to provide an optical signal to illuminate a finger to generate return light, which is used to pass through the liquid crystal panel and the fingerprint detection light transmission area of the backlight module and transmit To the fingerprint recognition module; the fingerprint recognition module is arranged below the fingerprint detection light-transmitting area, used to receive the return light passing through the fingerprint detection light-transmitting area, and obtain a fingerprint image according to the return light, the The fingerprint image is used by the fingerprint identification device to perform the fingerprint identification.
  • the light source in the fingerprint identification device in the embodiment of the present application may correspond to the fingerprint identification light source 5000 in the terminal device 10000
  • the fingerprint identification module in the fingerprint identification device may correspond to the fingerprint identification module in the terminal device 10000 Group 4000
  • the fingerprint identification method performed by the fingerprint identification module 4000 may also be executed.
  • the fingerprint identification device may perform the above method 100 to method 800, which will not be repeated here for brevity.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a division of logical functions.
  • there may be other divisions for example, multiple units or components may be combined or Can be integrated into 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, mechanical 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 are integrated into one unit.
  • the function 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 storage medium.
  • the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application.
  • the aforementioned storage media include: 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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  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

L'invention concerne un procédé et un appareil de reconnaissance d'empreinte digitale et un dispositif terminal (10000), tous permettant une détection d'empreinte digitale d'un écran LCD. Le dispositif terminal (10000) comprend une plaque de couverture en verre (1000) servant à établir une interface tactile ; un panneau à cristaux liquides (2000) situé sous la plaque de couverture en verre (1000) ; une source de lumière (5000) de reconnaissance d'empreinte digitale située sous la plaque de couverture en verre (1000) et servant à émettre de la lumière et à exposer le doigt à un rayonnement pour produire une lumière de retour ; un module de rétroéclairage (3000) situé sous le panneau à cristaux liquides (2000), une région de transmission (3101) de lumière de détection d'empreinte digitale comprise dans la structure de plaque de guidage non lumineuse (3100) servant à transmettre la lumière de retour ; et un module de reconnaissance (4000) d'empreinte digitale situé sous la région de transmission (3101) de lumière de détection d'empreinte digitale et servant à acquérir une image d'empreinte digitale conformément à la lumière de retour reçue qui a traversé la région de transmission (3101) de lumière de détection d'empreinte digitale.
PCT/CN2018/110299 2018-10-15 2018-10-15 Procédé et appareil de reconnaissance d'empreinte digitale et dispositif terminal à fonction de reconnaissance d'empreinte digitale WO2020077506A1 (fr)

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PCT/CN2018/110299 WO2020077506A1 (fr) 2018-10-15 2018-10-15 Procédé et appareil de reconnaissance d'empreinte digitale et dispositif terminal à fonction de reconnaissance d'empreinte digitale

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Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200327300A1 (en) * 2019-04-10 2020-10-15 Shenzhen GOODIX Technology Co., Ltd. Optical id sensing using illumination light sources positioned at a periphery of a display screen
CN110909583A (zh) * 2019-04-23 2020-03-24 深圳阜时科技有限公司 显示装置、指纹传感系统及电子设备
CN110222618B (zh) * 2019-05-29 2021-05-25 维沃移动通信有限公司 一种屏幕指纹组件及终端设备
CN211427356U (zh) * 2019-07-29 2020-09-04 深圳阜时科技有限公司 一种指纹感测装置及电子设备
CN110414467A (zh) * 2019-08-05 2019-11-05 深圳市隆利科技股份有限公司 指纹识别终端设备
CN110414503A (zh) * 2019-08-05 2019-11-05 深圳市隆利科技股份有限公司 用于lcd屏内指纹识别的背光模组及电子设备
CN110414466A (zh) * 2019-08-05 2019-11-05 深圳市隆利科技股份有限公司 电子设备
CN110441947B (zh) * 2019-08-19 2023-03-24 厦门天马微电子有限公司 一种显示装置
CN110516591B (zh) * 2019-08-27 2023-06-20 深圳市隆利科技股份有限公司 基于光学传感器的指纹识别终端设备
CN110619306A (zh) * 2019-09-18 2019-12-27 Oppo广东移动通信有限公司 显示屏组件、电子设备及指纹处理方法
US10936847B1 (en) 2019-09-20 2021-03-02 Shenzhen GOODIX Technology Co., Ltd. Under-display optical sensor with compensated light paths
CN111066030B (zh) * 2019-10-29 2024-03-15 深圳市汇顶科技股份有限公司 屏下指纹识别装置及电子设备
CN110684397B (zh) * 2019-10-31 2023-01-10 Oppo广东移动通信有限公司 光扩散油墨及其制备方法、盖板和电子设备
WO2021087741A1 (fr) * 2019-11-05 2021-05-14 深圳市汇顶科技股份有限公司 Procédé de reconnaissance d'empreintes digitales sous-écran, système de reconnaissance d'empreintes digitales lcd, et dispositif électronique
WO2021097720A1 (fr) * 2019-11-20 2021-05-27 深圳市汇顶科技股份有限公司 Dispositif d'identification d'empreintes digitales sous-écran et dispositif terminal
CN111095058B (zh) * 2019-11-20 2022-02-08 深圳市汇顶科技股份有限公司 屏下指纹识别装置及系统、导光板组件和液晶显示屏幕
CN111123580A (zh) * 2019-12-18 2020-05-08 深圳市隆利科技股份有限公司 用于指纹识别的背光装置及电子设备
CN111107201B (zh) * 2019-12-26 2021-08-06 Oppo广东移动通信有限公司 电子设备
CN111325102B (zh) * 2020-01-21 2023-11-24 天津极豪科技有限公司 屏下指纹摄像组件、lcd屏下指纹组件及移动终端
CN111597912A (zh) * 2020-04-23 2020-08-28 昆山国显光电有限公司 显示模组及具有该显示模组的电子设备
WO2021217603A1 (fr) * 2020-04-30 2021-11-04 深圳市汇顶科技股份有限公司 Dispositif de reconnaissance d'empreintes digitales et appareil électronique mobile
TWI780436B (zh) * 2020-05-19 2022-10-11 英屬開曼群島商敦泰電子有限公司 屏下指紋辨識裝置
TWI759014B (zh) * 2020-12-16 2022-03-21 大陸商北京集創北方科技股份有限公司 克服強光干擾之光學指紋識別方法及利用其之觸控顯示器和資訊處理裝置
CN112580605B (zh) * 2020-12-31 2024-05-24 敦泰电子（深圳）有限公司 指纹图像采集方法、装置、电子设备及存储介质

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120328170A1 (en) * 2011-06-24 2012-12-27 GIingy Technology Co., LTD Fingerprint recognition device
CN103942537A (zh) * 2014-04-04 2014-07-23 王曙光 液晶终端设备、指纹图像的采集方法及指纹采集器
CN105446451A (zh) * 2015-02-13 2016-03-30 比亚迪股份有限公司 指纹识别装置、移动终端和指纹识别装置的唤醒方法
CN206270982U (zh) * 2016-10-25 2017-06-20 深圳市汇顶科技股份有限公司 一种传感器装置及移动终端
CN107820617A (zh) * 2017-09-30 2018-03-20 深圳市汇顶科技股份有限公司 指纹识别的方法、装置和终端设备

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107004130B (zh) * 2015-06-18 2020-08-28 深圳市汇顶科技股份有限公司 用于屏幕上指纹感应的屏幕下光学传感器模块
US10366272B2 (en) * 2016-04-19 2019-07-30 Samsung Electronics Co. Ltd Electronic device supporting fingerprint verification and method for operating the same
CN106650585B (zh) * 2016-09-30 2019-10-08 浙江星星科技股份有限公司 一种用于活体指纹识别的玻璃面板
CN207182353U (zh) * 2017-09-15 2018-04-03 南昌欧菲生物识别技术有限公司 光学指纹识别组件和电子装置
CN108323195B (zh) * 2018-01-15 2021-07-02 深圳市汇顶科技股份有限公司 指纹识别系统的按压检测方法、装置和终端设备
CN207690116U (zh) * 2018-01-31 2018-08-03 江西合力泰科技有限公司 一种红外光学指纹识别系统
CN108469704B (zh) * 2018-05-03 2024-05-28 东莞市美光达光学科技有限公司 一种隐藏于手机屏幕下方的发光模组
CN209072544U (zh) * 2018-10-15 2019-07-05 深圳市汇顶科技股份有限公司 指纹识别装置及具有指纹识别功能的终端设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120328170A1 (en) * 2011-06-24 2012-12-27 GIingy Technology Co., LTD Fingerprint recognition device
CN103942537A (zh) * 2014-04-04 2014-07-23 王曙光 液晶终端设备、指纹图像的采集方法及指纹采集器
CN105446451A (zh) * 2015-02-13 2016-03-30 比亚迪股份有限公司 指纹识别装置、移动终端和指纹识别装置的唤醒方法
CN206270982U (zh) * 2016-10-25 2017-06-20 深圳市汇顶科技股份有限公司 一种传感器装置及移动终端
CN107820617A (zh) * 2017-09-30 2018-03-20 深圳市汇顶科技股份有限公司 指纹识别的方法、装置和终端设备

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