CN109496314B - Fingerprint recognition device and electronic equipment under screen - Google Patents

Fingerprint recognition device and electronic equipment under screen Download PDF

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Publication number
CN109496314B
CN109496314B CN201880002094.2A CN201880002094A CN109496314B CN 109496314 B CN109496314 B CN 109496314B CN 201880002094 A CN201880002094 A CN 201880002094A CN 109496314 B CN109496314 B CN 109496314B
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China
Prior art keywords
fingerprint
liquid crystal
crystal panel
light
emitting unit
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CN201880002094.2A
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Chinese (zh)
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CN109496314A (en
Inventor
李顺展
青小刚
何毅
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Shenzhen Goodix Technology Co Ltd
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Shenzhen Goodix Technology Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • 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
    • G06F3/0412—Digitisers structurally integrated in a display

Abstract

The embodiment of the application discloses fingerprint identification equipment and electronic equipment under screen, can be applicable to the fingerprint identification under the screen of LCD screen. This fingerprint recognition device under screen is applied to in the electronic equipment who has backlight unit and liquid crystal display panel, backlight unit is located liquid crystal display panel's below, liquid crystal display panel includes display area and non-display area, be provided with fingerprint detection area on the display area, this fingerprint recognition device includes under screen: the fingerprint sensor is arranged below the non-display area of the liquid crystal panel, receives an optical signal which is sent by the backlight module and reflected by a finger above the fingerprint detection area, and generates fingerprint information of the finger according to the received optical signal.

Description

Fingerprint recognition device and electronic equipment under screen
Technical Field
The embodiment of the application relates to the field of underscreen fingerprint identification, and more particularly relates to an underscreen fingerprint identification device and an electronic device.
Background
At present, the under-screen fingerprint recognition is mainly applied to an organic light-emitting diode (OLED) screen, and the principle is as follows: the fingerprint identification module under the OLED screen utilizes the light transmission characteristic that OLED screen itself possessed, receives the reverberation detection fingerprint that forms behind the finger reflection that OLED screen self sent.
However, since the light emitting principle and the specific structure of a Liquid Crystal Display (LCD) panel are different from those of an OLED panel, the backlight module of the LCD panel has opacity. Therefore, the OLED under-screen fingerprint identification scheme is not suitable for LCD screens.
Therefore, how to realize optical fingerprint identification under an LCD screen is a technical problem to be solved urgently in the field.
Disclosure of Invention
The embodiment of the application provides a fingerprint identification device and electronic equipment under a screen, which can be suitable for fingerprint identification under the screen of an LCD screen.
In a first aspect, a device for identifying fingerprints under a screen is provided, and is applied to an electronic device having a backlight module and a liquid crystal panel, where the backlight module is located below the liquid crystal panel, the liquid crystal panel includes a display area and a non-display area, and the display area is provided with a fingerprint detection area, including: the fingerprint sensor is arranged below the non-display area of the liquid crystal panel, receives an optical signal which is sent by the backlight module and reflected by a finger above the fingerprint detection area, and generates fingerprint information of the finger according to the received optical signal.
In some possible implementations, the under-screen fingerprint identification device further includes a light-emitting unit and a control unit, the light-emitting unit is located below the non-display area of the liquid crystal panel, and the control unit is configured to control the light-emitting unit to emit a light signal to the fingerprint detection area; the fingerprint sensor is also used for receiving the light signals emitted by the light-emitting unit and reflected by the finger above the fingerprint detection area, and generating the fingerprint information of the finger according to the received light signals.
In some possible implementations, the control unit is configured to control the light emitting unit to emit a light signal to the fingerprint detection area when the liquid crystal panel is in a screen-off state.
In some possible implementations, the light emitting unit is disposed obliquely with respect to the liquid crystal panel such that a light emitting angle of the light emitting unit is aligned with the fingerprint detection area.
In some possible thin line modes, the inclination angle of the light emitting unit is equal to or greater than 0 ° and equal to or less than 60 °.
In some possible implementations, the inclination angle of the light emitting unit is greater than or equal to 30 ° and less than or equal to 45 °.
In some possible implementations, the non-display area includes a first target position opposite to the position of the light emitting unit, and the first target position is located at a position where a center position of the fingerprint detection area extends along a length direction of the liquid crystal panel.
In some possible implementation manners, the light emitting unit includes a first light emitting unit and a second light emitting unit, the non-display area includes a second target position opposite to the positions of the first light emitting unit and the second light emitting unit, and the second target position is located on two sides of a position where a central position of the fingerprint detection area extends along a length direction of the liquid crystal panel.
In some possible implementations, the control unit is further configured to control the light emitting unit to emit the light signal in synchronization with the fingerprint sensor receiving the light signal reflected by the finger.
In some possible implementations, the device for identifying fingerprints further includes: the reflector is positioned below the non-display area of the liquid crystal panel and used for reflecting the optical signal reflected by the finger; the optical lens is positioned below a non-display area of the liquid crystal panel and used for focusing the optical signal reflected by the reflector to the fingerprint sensor; and the photosensitive surface of the fingerprint sensor faces the reflecting surface of the reflector and is used for generating fingerprint information of the finger according to the optical signal focused by the optical lens.
In some possible implementation manners, a light-sensitive surface of the fingerprint sensor faces away from the liquid crystal panel, a light-reflecting surface of the reflector faces the light-sensitive surface of the fingerprint sensor, and the optical lens stands on the side and is used for receiving the optical signal reflected by the reflector. .
In some possible implementations, the non-display area includes a third target position opposite to a position where the reflective mirror and the fingerprint sensor are located, and the third target position is located at a position where a center position of the fingerprint detection area extends in a length direction of the liquid crystal panel.
In some possible implementation manners, an included angle between the optical axis of the optical lens and the liquid crystal panel is 0-30 °.
In some possible implementations, an included angle between the optical axis of the optical lens and the liquid crystal panel is 15 °.
In a second aspect, a fingerprint identification device under screen is provided, which is applied to an electronic device having a backlight module and a liquid crystal panel, wherein the backlight module is located below the liquid crystal panel, the liquid crystal panel includes a display area and a non-display area, the display area is provided with a fingerprint detection area, and the fingerprint identification device under screen includes: a light emitting unit disposed below a non-display region of the liquid crystal panel; a control unit for controlling the light emitting unit to emit a light signal to the fingerprint detection area; the fingerprint sensor is arranged below the non-display area of the liquid crystal panel, receives the light signals emitted by the light emitting unit and reflected by the fingers above the fingerprint detection area, and generates fingerprint information of the fingers according to the received light signals.
In a third aspect, an electronic device is provided, including: the liquid crystal display panel comprises a display area and a non-display area, wherein the display area is provided with a fingerprint detection area; the backlight module is positioned below the liquid crystal panel; and the fingerprint sensor is positioned below the non-display area of the liquid crystal panel and used for receiving the optical signal which is sent by the backlight module and reflected by the finger above the fingerprint detection area and generating the fingerprint information of the finger according to the received optical signal.
In some possible implementations, the electronic device further includes a light-emitting unit located below the non-display area of the liquid crystal panel, and a control unit configured to control the light-emitting unit to emit a light signal to the fingerprint detection area; the fingerprint sensor is also used for receiving the light signals emitted by the light-emitting unit and reflected by the finger above the fingerprint detection area, and generating the fingerprint information of the finger according to the received light signals.
In some possible implementations, the control unit is configured to control the light emitting unit to emit a light signal to the fingerprint detection area when the liquid crystal panel is in a screen-off state.
In some possible implementations, the light emitting unit is disposed obliquely with respect to the liquid crystal panel such that a light emitting angle of the light emitting unit is aligned with the fingerprint detection area.
In some possible thin line modes, the inclination angle of the light emitting unit is equal to or greater than 0 ° and equal to or less than 60 °.
In some possible implementations, the inclination angle of the light emitting unit is greater than or equal to 30 ° and less than or equal to 45 °.
In some possible implementations, the non-display area includes a first target position opposite to the position of the light emitting unit, and the first target position is located at a position where a center position of the fingerprint detection area extends along a length direction of the liquid crystal panel.
In some possible implementation manners, the light emitting unit includes a first light emitting unit and a second light emitting unit, the non-display area includes a second target position opposite to the positions of the first light emitting unit and the second light emitting unit, and the second target position is located on two sides of a position where a central position of the fingerprint detection area extends along a length direction of the liquid crystal panel.
In some possible implementations, the control unit is further configured to control the light emitting unit to emit the light signal in synchronization with the fingerprint sensor receiving the light signal reflected by the finger.
In some possible implementations, the electronic device further includes: the reflector is positioned below the non-display area of the liquid crystal panel and used for reflecting the optical signal reflected by the finger; the optical lens is positioned below a non-display area of the liquid crystal panel and used for focusing the optical signal reflected by the reflector to the fingerprint sensor; and the photosensitive surface of the fingerprint sensor faces the reflecting surface of the reflector and is used for generating fingerprint information of the finger according to the optical signal focused by the optical lens.
In some possible implementation manners, an included angle between the optical axis of the optical lens and the liquid crystal panel is 0-30 °.
In some possible implementations, an included angle between the optical axis of the optical lens and the liquid crystal panel is 15 °.
In a fourth aspect, an electronic device is provided, comprising: the liquid crystal display panel comprises a display area and a non-display area, wherein the display area is provided with a fingerprint detection area; the backlight module is positioned below the liquid crystal panel; a light emitting unit located below a non-display region of the liquid crystal panel; a control unit for controlling the light emitting unit to emit a light signal to the fingerprint detection area; and the fingerprint sensor is positioned below the non-display area of the liquid crystal panel and used for receiving the light signal which is sent by the light-emitting unit and reflected by the finger above the fingerprint detection area and generating the fingerprint information of the finger according to the received light signal.
In the technical scheme that this application embodiment provided, need not change the backlight structure and the rete in a poor light that have backlight unit's display screen, set up the fingerprint sensor in the below of the non-display area of liquid crystal display panel, and the fingerprint detection region still is located liquid crystal display panel's display area. After the light signal that backlight unit sent is through the reflection of the finger of fingerprint detection area top, need not pass through backlight unit and be received by fingerprint sensor to realize fingerprint image's collection and fingerprint identification, make the display screen that has backlight unit can realize fingerprint identification under the screen. And the fingerprint sensor is arranged below the non-display area of the liquid crystal panel, so that the display effect of the screen is not influenced.
Drawings
Fig. 1 is a schematic diagram of an application scenario of the underscreen fingerprint recognition provided in an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of an electronic device to which a conventional underscreen fingerprint identification apparatus according to an embodiment of the present application is applied.
Fig. 4 is a schematic structural diagram of an underscreen fingerprint identification device according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of another device for identifying fingerprints under a screen according to an embodiment of the present application.
Fig. 6 is a schematic structural diagram of another device for identifying fingerprints under a screen according to an embodiment of the present application.
Fig. 7 is a schematic structural diagram of another device for identifying fingerprints under a screen according to an embodiment of the present application.
Fig. 8 is a schematic structural diagram of another device for identifying fingerprints under a screen according to an embodiment of the present application.
Fig. 9 is a schematic structural diagram of another device for identifying fingerprints under a screen according to an embodiment of the present application.
Fig. 10 is a schematic flowchart of a fingerprint registration method provided in an embodiment of the present application.
Fig. 11 is a schematic flowchart of a fingerprint identification method according to an embodiment of the present application.
Fig. 12 is a schematic structural diagram of another device for identifying fingerprints under a screen according to an embodiment of the present application.
Detailed Description
The embodiments of the present application can be applied to fingerprint systems, including but not limited to optical, ultrasonic or other fingerprint identification systems and medical diagnostic products based on optical, ultrasonic or other fingerprint imaging, and the embodiments of the present application are only described by way of example, but should not be construed as limiting the embodiments of the present application, and the embodiments of the present application are also applicable to other systems using optical, ultrasonic or other imaging technologies, and the like.
The technical solution of the embodiment of the present application may perform other biometric identification, for example, living body identification, besides fingerprint identification, which is not limited in the embodiment of the present application.
The technical scheme of the embodiment of the application can be applied to various electronic devices, and more particularly, can be applied to electronic devices with display screens. For example, portable or mobile computing devices such as smart phones, notebook computers, tablet computers, and game devices, and other electronic devices such as electronic databases, automobiles, and Automatic Teller Machines (ATMs), but the present application is not limited thereto.
More specifically, in the above electronic device, the fingerprint acquisition device may be embodied as an optical fingerprint device, which may be disposed in a partial area or an entire area below the display screen, thereby forming an under-screen (under-display) optical fingerprint system. The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.
It should be noted that, for convenience of description, like reference numerals denote like parts in the embodiments of the present application, and a detailed description of the like parts is omitted in different embodiments for the sake of brevity.
It should be understood that the thickness, length, width and other dimensions of the various components in the embodiments of the present application and the overall thickness, length, width and other dimensions of the underscreen fingerprint identification device shown in the drawings are merely illustrative and should not be construed as limiting the present application in any way.
Fig. 1 is a schematic structural diagram of a terminal device to which an off-screen fingerprint identification device can be applied, and the terminal device 100 includes a display screen 120 and a fingerprint identification device 130, wherein the fingerprint identification device 130 is disposed in a local area below the display screen 120. The fingerprint recognition device 130 includes a sensing array having a plurality of optical sensing units, and the sensing array is located in a fingerprint detection area 103 of the fingerprint recognition device 130.
As shown in fig. 1, the display screen 120 may include a display area 102 and a non-display area 105, and the fingerprint detection area 103 is located in the display area 102 of the display screen 120, so that when a user needs to unlock or otherwise verify a fingerprint of the terminal device, the user only needs to press a finger on the fingerprint detection area 103 located on the display screen 120 to input the fingerprint. Since fingerprint detection can be implemented in the screen, the terminal device 100 adopting the above structure does not need a special reserved space on the front surface thereof to set a fingerprint key (such as a Home key), and thus a full-screen scheme can be adopted, that is, the display area of the display screen 120 can be basically extended to the whole front surface of the terminal device 100.
The display 120 may be a Liquid Crystal Display (LCD) or other passive light emitting display.
Optionally, the display screen 120 may be a touch display screen, which not only performs image display, but also detects a touch or pressing operation of a user, so as to provide a human-computer interaction interface for the user. For example, in an embodiment, the terminal device 100 may include a touch sensor, which may be embodied as a Touch Panel (TP), and may be disposed on a surface of the display screen 120, or may be partially integrated or entirely integrated inside the display screen 120, so as to form the touch display screen.
It should be appreciated that in particular implementations, the terminal device 100 also includes a transparent protective cover plate, which may be a glass cover plate or a sapphire cover plate, positioned over the display screen 120 and covering the front face of the terminal device 100. In the present embodiment, the so-called finger pressing on the display screen 120 may actually be finger pressing on a cover plate above the display screen 120 or a surface of a protective layer covering the cover plate.
As an alternative implementation, as shown in fig. 1, the fingerprint identification device 130 includes at least one light detection portion 134 and an optical component 132, the light detection portion 134 includes the sensing array and a reading circuit and other auxiliary circuits electrically connected to the sensing array, which can be fabricated on a chip (die) by a semiconductor process; the optical element 132 may be disposed above the sensing array of the light detecting portion 134, and may specifically include a filter layer (filter) for filtering out ambient light penetrating through the finger, a light guiding layer for guiding the reflected light reflected from the surface of the finger to the sensing array for optical detection, and other optical elements.
In particular implementations, the plurality of optical components 132 may be packaged with the at least one light detecting portion 134 on the same optical fingerprint chip. The light guide layer can be a lens (lens) layer made of a semiconductor silicon wafer, the lens (lens) layer is provided with a plurality of lens units, reflected light reflected from a finger is received by the optical sensing unit below the lens unit, and accordingly, the sensing array can detect a fingerprint image of the finger.
The embodiment of the application can be applied to electronic equipment with one fingerprint identification device and one fingerprint detection area, and also can be applied to electronic equipment with a plurality of fingerprint identification devices and a plurality of fingerprint detection areas.
It should be understood that in the embodiment of the present application, the optical sensor may also be referred to as an image sensor (sensor), a photoelectric sensor or a fingerprint sensor, and may be fabricated as a chip (DIE) through a semiconductor process, that is, the DIE includes the image sensor.
Under some circumstances, optical sensor in this application embodiment also can be called optical fingerprint device, optics fingerprint identification module, fingerprint device, fingerprint identification module, fingerprint collection device etc..
The current technology of fingerprint identification under a screen is basically applied to a self-luminous mobile phone screen such as an OLED (organic light emitting diode) or an active-matrix organic light emitting diode (AMOLED), and self-luminous pixels of the OLED screen are used as light source light rays to irradiate a finger, pass through the reflection of the finger and the gap between the pixels of the OLED screen, and be received by a fingerprint sensor under the screen, so that the collection and fingerprint identification of a fingerprint image are realized.
However, the LCD panel is different from the OLED panel in that the LCD panel uses a backlight module to provide a light source, and the light emitted from the backlight module can display an image on the liquid crystal panel.
Fig. 2 is a schematic view of the structure of an LCD screen. The liquid crystal panel 210 may include a glass cover 230 and a Thin Film Transistor (TFT) liquid crystal 240. The backlight module 220 may include a brightness enhancement film 250, a light homogenizing film 260, a light guide plate 270, a reflective film 280, and a steel plate reinforcement 290.
Taking light with a wavelength of 850nm as an example, the light transmittance of each film layer of the backlight module is shown in table 1.
TABLE 1
Film layer of backlight module Light transmittance
Reflective film 1.00％
Light guide plate 60％
Brightness enhancement film 1.40％
Even light membrane 3.80％
Steel plate reinforcement 0.00％
Total transmittance 0.00％
As can be seen from table 1, the total transmittance of the backlight module to light is 0%, i.e., the backlight module is opaque.
Fig. 3 is a schematic structural diagram of an LCD screen. The optical signal emitted from the backlight module 320 can pass through the liquid crystal panel 310 to reach the finger, and the optical signal reflected by the finger can reach the backlight module 320. However, because of the light-tight property of the backlight module 320, the light reflected by the finger cannot penetrate through the backlight module and cannot be received by the fingerprint identification module 330 below the screen, and thus, an optical signal detection circuit for the fingerprint under the screen cannot be formed.
Because backlight unit's optical characteristic for the in-process of light signal after the finger reflection transmitting to fingerprint identification module, energy loss is very big, and then leads to unable fingerprint identification of realizing. I.e. the OLED under-screen fingerprint identification scheme is not suitable for LCD screens.
In conclusion, the LCD screen cannot adopt the under-screen fingerprint structure of the OLED screen or the AMOLED screen for fingerprint identification, and how to perform the under-screen fingerprint identification on the LCD screen becomes a technical problem that needs to be solved urgently.
The embodiment of the application provides a device for identifying fingerprints under a screen, which is shown in fig. 4, so that electronic equipment with a backlight module can identify fingerprints under the screen.
The device for identifying fingerprints under a screen provided by the embodiment of the application is applied to an electronic device with a backlight module 420 and a liquid crystal panel 430, wherein the backlight module 420 is located below the liquid crystal panel 430. The liquid crystal panel 430 includes a display area and a non-display area, and a fingerprint detection area 440 is disposed on the display area of the liquid crystal panel 430.
The off-screen fingerprint identification device may include a fingerprint sensor 410. The fingerprint sensor 410 is disposed below the non-display area of the liquid crystal panel 430, and receives the light signal emitted by the backlight module 420 and reflected by the finger above the fingerprint detection area 440, and generates fingerprint information of the finger according to the received light signal.
It is understood that the fingerprint detection area 440 may be a fixed position of the display area on the liquid crystal panel, or may extend to the entire display area of the liquid crystal panel, which is not specifically limited in this embodiment of the present application.
Similarly, the fingerprint sensor 410 under the liquid crystal panel 430 may be a fingerprint sensor, or may be a plurality of fingerprint sensors, and the plurality of fingerprint sensors may be configured to receive light signals reflected by fingers in different fingerprint detection areas on the liquid crystal panel.
The liquid crystal panel can be a liquid crystal panel of an LCD screen or a liquid crystal panel of other passive light-emitting display screens, and the embodiment of the application does not limit the liquid crystal panel.
The fingerprint sensor is located the below of liquid crystal display panel, can understand that the fingerprint sensor is located the below of glass apron.
Because fingerprint sensor is located liquid crystal display panel's below, rather than backlight unit's below, the light signal that the finger that fingerprint sensor received was reflected back need not pass through backlight unit, consequently, fingerprint sensor can receive the light signal that the finger reflected back and carry out fingerprint identification. In addition, the fingerprint sensor is arranged below the non-display area of the liquid crystal panel, and the display effect of the screen cannot be influenced.
The technical scheme that this application embodiment provided need not change the backlight structure and the rete in a poor light that have backlight unit's display screen, sets up fingerprint sensor in liquid crystal display panel's non-display area's below, and fingerprint detection area still is located liquid crystal display panel's display area. After the light signal that backlight unit sent is through the reflection of the finger of fingerprint detection area top, need not pass through backlight unit and be received by fingerprint sensor to realize fingerprint image's collection and fingerprint identification, make the display screen that has backlight unit can realize fingerprint identification under the screen.
Alternatively, the electronic device may refer to a mobile phone, the non-display area may refer to a chin position of the mobile phone, and the fingerprint sensor may be disposed below the liquid crystal panel at the chin position of the mobile phone.
Optionally, the device for identifying finger prints under screen may further include a light emitting unit and a control unit, as shown in fig. 5. The light emitting unit 450 may be positioned below the non-display area of the liquid crystal panel 430, and the control unit may control the light emitting unit 450 to emit a light signal to the fingerprint detection area 440.
Alternatively, the control unit controlling the light emitting unit 450 to emit the light signal may refer to the control unit controlling the light emitting unit 450 to emit the light signal when fingerprint collection is required, that is, no matter whether the current liquid crystal panel is in a bright screen state or a dead screen state.
In some implementations, the control unit may control the light emitting unit 450 to emit the light signal when the liquid crystal panel is in the off-screen state. When the liquid crystal panel is in a bright screen state, the light source required by fingerprint identification can be provided by the backlight module.
The fingerprint sensor can receive an optical signal which is emitted by the light-emitting unit and reflected by a finger above the fingerprint detection area, and generate fingerprint information of the finger according to the received optical signal.
In the embodiment of the application, through setting up the luminescence unit, strengthen the light signal that the finger reflected back for the light signal that the finger that the fingerprint sensor received reflected back increases, can improve fingerprint identification's sensitivity.
In addition, because electronic equipment is when going out the screen state, backlight unit does not provide the light source, and the luminescence unit in this application embodiment can independently give out light, can be in when going out the screen state at electronic equipment, provides the light source for fingerprint identification, to fingerprint detection area emission optical signal. Therefore, fingerprint identification can be realized when the electronic equipment is in a screen-off state.
The light signal emitted by the light source may be a visible light signal or an invisible light signal. The invisible light signal may be, for example, an infrared light signal. The infrared light signal has strong penetrating power and is invisible, and the display image is not influenced, so that the infrared light signal can be used as an optimal light signal.
In this application embodiment, fingerprint sensor can receive the light signal that the warp finger that backlight unit sent reflects back, or the light signal that the warp finger that also can receive the luminescence unit and send reflects back, or can receive the light signal that the warp finger that backlight unit and luminescence unit sent reflects back simultaneously.
Alternatively, the light emitting unit may be disposed in parallel with the liquid crystal panel or may be disposed obliquely so that the light emitting angle of the light emitting unit is aligned with the fingerprint detection area. Therefore, more optical signals can reach the finger above the fingerprint detection area, the luminous efficiency is improved, and the sensitivity of fingerprint identification is improved.
The inclination angle of the light emitting unit may be, for example, in the range of 0 ° or more and 60 ° or less. The inclination angle may refer to an included angle between light emitted from the light emitting unit and the liquid crystal panel.
As an example, the inclination angle of the light emitting unit may be, for example, 30 ° to 45 °. The specific light emitting angle of the light emitting unit can be determined according to the position of the light emitting unit on the liquid crystal panel and/or the position of the fingerprint detection area on the liquid crystal panel.
The range of the inclination angle of the light emitting unit described above is only one specific implementation, and the inclination angle may be other angles outside the range as long as the light signal emitted by the light emitting unit can be emitted to the fingerprint detection area.
In addition, the control unit can also control the light-emitting unit to emit a light signal to be synchronous with the light signal reflected by the finger received by the fingerprint sensor through a synchronous signal.
Alternatively, the underscreen fingerprint recognition device may include a mirror and an optical lens. The reflector and the optical lens are both positioned below the non-display area of the liquid crystal panel, and the reflector can receive the optical signal reflected by the finger and reflect the optical signal to the optical lens. The optical lens can focus the optical signal reflected by the reflector to the fingerprint sensor. Therefore, the fingerprint sensor can collect fingerprint images according to the received optical signals.
Fig. 6 is a schematic structural diagram of an electronic device to which another fingerprint identification device is applied according to an embodiment of the present application. The fingerprint recognition device shown in fig. 6 can be applied to an electronic device having a backlight module 420 and a liquid crystal panel 430, wherein the backlight module 420 is located below the liquid crystal panel 430. The liquid crystal panel 430 may include a display area and a non-display area, and a fingerprint detection area 440 is disposed on the display area of the liquid crystal panel 430.
The underscreen fingerprint recognition device screen shown in fig. 6 may include:
a reflective mirror 460 disposed below the non-display area of the liquid crystal panel 430 for reflecting the light signal reflected by the finger; an optical lens 470 positioned below the non-display area of the liquid crystal panel 430, which can receive the light signal reflected by the reflective mirror 460 and focus the light signal to the fingerprint sensor 410; the light-sensing surface of the fingerprint sensor 410 may face the reflective surface of the reflective mirror 460 for generating fingerprint information of the finger based on the optical signal focused by the optical lens 470.
Optionally, the device for identifying fingerprints under screen may further include a light emitting unit 450, where the light emitting unit 450 is located below the non-display area of the liquid crystal panel, and may implement independent light emission. The control unit may control the light emitting unit 450 to emit a light signal to the fingerprint detection area.
Specifically, the light signal emitted by the light emitting unit can penetrate through the liquid crystal panel and irradiate the finger above the fingerprint detection area to form diffuse reflection. The light signal after the diffuse reflection of the finger carries the fingerprint information of the finger. The light signal after the diffuse reflection of the finger passes through the liquid crystal panel again and reaches the reflector below the non-display area. The optical lens can focus the optical signal reflected by the reflector to the fingerprint sensor. The fingerprint sensor generates fingerprint information of the finger according to the received light signal.
The description of the light-emitting unit or other corresponding features shown in fig. 6 can be referred to the above description, and is not repeated here to avoid repetition.
The fingerprint sensor 410, the light-emitting unit 450, the reflective mirror 460, and the optical lens 470 of the device for identifying fingerprint under screen shown in fig. 6 may be assembled together through a Flexible Printed Circuit (FPC) connection 480 to form an integral fingerprint module.
The reflective mirror 460 may be located below the non-display area of the liquid crystal panel, and is configured to receive the light signal reflected by the finger and reflect the light signal. The optical lens 470 may be positioned on its side, receive the light signal reflected by the mirror 460, and focus the light signal onto the fingerprint sensor 410. The light-sensing surface of the fingerprint sensor 410 may face the reflection surface of the reflective mirror, and is configured to receive the light signal focused by the optical lens and generate fingerprint information of the finger according to the light signal.
In one implementation, the reflective surface of the reflective mirror 460 may face upward, i.e., the reflective surface of the reflective mirror 460 faces the lower surface of the liquid crystal panel 430, the fingerprint sensor 410 may be inverted, with the photosensitive surface facing downward, i.e., the photosensitive surface of the fingerprint sensor 410 faces away from the lower surface of the liquid crystal panel 430, and the reflective surface of the reflective mirror 460 faces toward the photosensitive surface of the fingerprint sensor 410.
An optical lens 470 may be disposed between the fingerprint sensor 410 and the mirror 460.
Optionally, the non-display area of the liquid crystal panel includes a third target position opposite to the position where the reflective mirror and the fingerprint sensor are located, and the third target position is located at a position where a center position of the fingerprint detection area extends in a length direction of the liquid crystal panel.
Alternatively, the optical lens stands on its side, and the optical axis of the optical lens may not be limited to be parallel to the liquid crystal panel as shown in fig. 6, and may have a certain included angle with the display screen. The included angle may be, for example, 0 to 30 °. Preferably, the angle may be 15 °.
The setting angle of the optical lens can be adjusted according to the specific condition of the optical path. For example, it may be specifically determined according to the light emitting angle of the light emitting unit, the position of the fingerprint detection area on the liquid crystal panel, and/or the position of the mirror, etc.
In some embodiments, the setting angles of the optical lenses in different electronic devices may be the same or different.
The setting angle of the optical lens and the position of the fingerprint sensor can be correspondingly adjusted according to the specific condition of the light path. For example, the position of the fingerprint detection area in the display area, and/or the position, angle, etc. of the reflective mirror may be changed according to the emission angle of the light emitting unit.
In some embodiments, the location of the fingerprint sensor in different electronic devices may be the same or different.
The photosensitive surface of the fingerprint sensor faces downwards, the fingerprint sensor and the liquid crystal panel are arranged in parallel, the fingerprint sensor also has a certain inclination angle relative to the liquid crystal panel, and the embodiment of the application is not specifically limited to this, so long as the photosensitive surface of the fingerprint sensor can receive optical signals focused by the optical lens.
The structure of the fingerprint identification device provided by the embodiment of the application can be applied to electronic equipment such as a mobile phone and the like with higher requirements on size. The reflective mirror is added, and the optical lens is designed to be side-standing, so that the light signal reflected by the finger can reach the fingerprint sensor, and the size of the electronic equipment cannot be influenced.
Alternatively, the light emitting unit may be located in the non-display area of the liquid crystal panel at an extended position in the length direction of the liquid crystal panel at the center position of the fingerprint detection area, or at both sides of the extended position.
As shown in fig. 7 and 8, fig. 7 and 8 are schematic front views of an electronic device provided in an embodiment of the present application.
The fingerprint detection area 440 is located in the display area 610 of the liquid crystal panel, and the light emitting unit 450 and the fingerprint identification module 490 are both located below the non-display area 620 of the liquid crystal panel, where the non-display area 620 may be, for example, a non-display area of a chin of a mobile phone.
The fingerprint identification module 490 may include, for example, a mirror, an optical lens, a fingerprint sensor, and the like. The structure of the fingerprint identification module can be described with reference to fig. 6.
The specific position of the light emitting unit 450 may be, for example, as shown in fig. 7, and the non-display area 620 includes a first target position opposite to the position of the light emitting unit 450, and the first target position is located at a position where the center position of the fingerprint detection area 440 extends along the length direction of the liquid crystal panel.
For another example, the specific position of the light emitting unit 450 may be as shown in fig. 8, and the underscreen fingerprint identification apparatus may include 2 light emitting units 450, a first light emitting unit and a first light emitting unit. The non-display area 620 includes a second target position opposite to the positions of the first light emitting unit and the second light emitting unit, and the second target position is located at two sides of a position where the center position of the fingerprint detection area 440 extends along the length direction of the liquid crystal panel.
Optionally, the two light emitting units may be symmetrically disposed along a longitudinal axis of the liquid crystal panel, or asymmetrically disposed, which is not specifically limited in this embodiment of the present application.
In addition, the two light emitting units may be located on one side of the longitudinal axis of the liquid crystal panel, and are not limited to being located on both sides of the longitudinal axis of the liquid crystal panel.
The embodiment of the application is only exemplified by one light-emitting unit and two light-emitting units, and the underscreen fingerprint identification device can further comprise more than two light-emitting units.
The positions of the light emitting units shown in fig. 7 and 8 are only two possible arrangements, and the light emitting units may be disposed at any position of the non-display region of the liquid crystal panel.
The embodiment of the application also provides the electronic equipment which can support the identification of the fingerprint under the screen. The electronic device may comprise an underscreen fingerprint recognition apparatus as described above. Such as the underscreen fingerprint recognition devices shown in fig. 4-8.
Optionally, the electronic device may further include a liquid crystal panel and a backlight module. The backlight module is positioned below the liquid crystal panel. The liquid crystal panel comprises a display area and a non-display area, and a fingerprint detection area is arranged on the display area. The under-screen fingerprint identification device is positioned below a display area of the liquid crystal panel and used for receiving an optical signal which is sent by the backlight module and reflected by a finger above the fingerprint detection area and generating fingerprint information of the finger according to the received optical signal.
The description of the corresponding technical features in the electronic device may refer to the description of the fingerprint identification device under the screen, and is not repeated here to avoid repetition.
Fig. 9 is a schematic block diagram of an off-screen fingerprint identification apparatus according to an embodiment of the present application.
As shown in fig. 9, the underscreen fingerprint recognition apparatus may include: the system comprises a user interaction module, an image processing module and an optical fingerprint module. Wherein, optics fingerprint module can include the control unit, fingerprint sensor, power module and luminescence unit. The functions of the respective modules are described below.
A user interaction module: the fingerprint management operation interface can be provided for a user to start or close a fingerprint function, add or delete input fingerprints, and display the fingerprint input progress, an identification result, a pressing area and a prompt message.
An image processing module: finishing fingerprint image data reading and processing, extracting fingerprint image characteristics, storing the characteristics during fingerprint inputting, matching the characteristics during fingerprint identification, distinguishing true and false fingerprints, and interacting commands and data with a fingerprint control unit.
A control unit: and the control of the fingerprint sensor and the power supply module, command interaction, data reading and the like are completed. And carrying out command and data interaction with the image processing module.
Optionally, the control unit may further control the light signal emitted by the light source module to keep synchronous with the image acquisition of the fingerprint sensor through a synchronization signal.
Fingerprint sensor: the optical signal can be converted into an electric signal and a digital signal to finish the acquisition of optical fingerprint image data.
A light emitting unit: visible light or invisible light is provided for fingerprint acquisition. To the display screen that has backlight unit, for example the LCD screen, can not realize the region and light, can not provide any light source when putting out the screen, the luminescence unit in this application embodiment can provide the light source when putting out the screen for fingerprint identification.
The light-emitting unit can be integrated in the optical fingerprint module and hidden below a non-display area of the liquid crystal panel.
Optionally, the light source provided by the light emitting unit may be, for example, infrared light, which has strong penetrating power and is invisible, and does not affect screen display.
Optical fingerprint module: the control unit, the fingerprint sensor, the light-emitting unit and the like can be connected through the FPC to be assembled into an integral fingerprint module form.
Fig. 10 is a schematic flowchart of a method for fingerprint registration provided in an embodiment of the present application. The method may be executed by the mobile terminal 100 shown in fig. 1, the off-screen fingerprint identification apparatus shown in fig. 4-8, or a fingerprint identification module in the fingerprint identification apparatus. As shown in fig. 10, the method includes some or all of the following:
801. it is determined whether the user clicked on the "add fingerprint" command.
802. And after the user clicks the 'fingerprint adding command', switching to a mobile phone registration interface.
803. And entering a fingerprint acquisition mode.
804. It is detected whether the user presses the fingerprint detection area.
805. And in the case that the user is detected to press the fingerprint detection area, displaying a fingerprint identifier (logo) in the display area.
806. The optical fingerprint module carries out optical fingerprint image acquisition.
807. And preprocessing the acquired fingerprint image.
808. And judging whether the image quality meets the condition. If the image quality does not meet the condition, steps 806-808 are re-executed.
809. And when the image quality meets the condition, extracting the image features.
810. And refreshing the registration interface.
811. And judging whether the number of the input fingerprints meets the condition or not. And if the number of the recorded fingerprints does not meet the condition, continuing to execute the steps 803-811.
812. And storing the fingerprint template when the number of the input fingerprints meets the condition.
813. And prompting the user to complete the fingerprint input on a display interface.
814. And finishing fingerprint input.
Fig. 11 is a schematic flowchart of a fingerprint identification process provided in an embodiment of the present application. The method may be executed by the mobile terminal 100 shown in fig. 1, the off-screen fingerprint identification apparatus shown in fig. 4-8, or a fingerprint identification module in the fingerprint identification apparatus. As shown in fig. 11, the method includes some or all of the following:
901. and judging whether fingerprint unlocking is needed or not.
902. And entering a fingerprint acquisition mode under the condition that fingerprint unlocking is required.
903. And judging whether the user presses the fingerprint detection area.
904. And under the condition that the user is detected to press the fingerprint detection area, displaying the fingerprint logo on the display interface.
905. The fingerprint identification module carries out the collection of optics fingerprint image.
906. And preprocessing the image collected by the fingerprint identification module.
907. And extracting image features.
908. And judging whether the acquired image is matched with the stored fingerprint image.
909. And judging whether the user keeps pressing or not under the condition that the fingerprint images are not matched. And if the user keeps pressing, the steps 905-909 are executed again. If no user hold down is detected, jump directly to step 911.
910. And under the condition of fingerprint image matching, updating the fingerprint template according to the acquired fingerprint image.
911. And performing related actions. Such as unlocking success or failure, payment completion or failure, etc.
912. And finishing fingerprint identification.
In the embodiment of the present application, the functional modules shown in fig. 9 may be implemented in a hardware form, may also be implemented by instructions in a software form, and may also be implemented by a combination of hardware and software modules.
Specifically, the steps of the method embodiments shown in fig. 10 or fig. 11 in the embodiments of the present application may be performed by integrated logic circuits of hardware in the processor and/or instructions in the form of software, and the steps of the method disclosed in connection with the embodiments of the present application may be directly implemented as a hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
Alternatively, the software modules may be located in random access memory, flash memory, read only memory, programmable read only memory, electrically erasable programmable memory, registers, and the like, as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps in the above method embodiments in combination with hardware thereof.
Optionally, as shown in fig. 12, the off-screen fingerprint identification device 1000 may further include a memory 1020. The memory 1020 may be used to store instructions and codes, instructions, etc. that may be executed by the processor 1010. From the memory 1020, the processor 1010 may call and execute a computer program to implement the method in the embodiment of the present application.
The memory 1020 may be a separate device from the processor 1010 or may be integrated into the processor 1010.
Optionally, as shown in fig. 12, the off-screen fingerprint identification device 1000 may further include a liquid crystal panel 1040 for displaying information to a user.
Optionally, as shown in fig. 12, the device 1000 for identifying fingerprints under a screen may further include a fingerprint identification module 1030, where the fingerprint identification module may receive an optical signal reflected by a finger, and generate fingerprint information of the finger according to the received optical signal. Wherein, this fingerprint identification module can include fingerprint sensor.
It should be understood that the various components of the underscreen fingerprint identification device are connected by a bus system that includes a power bus, a control bus, and a status signal bus in addition to a data bus.
It should also be understood that the processor referred to in the embodiments of the present application may be an integrated circuit chip having signal processing capability, and may implement or execute the methods, steps and logic blocks disclosed in the embodiments of the present application.
For example, the processor may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a transistor logic device, a discrete hardware component, and so on. Further, a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
Further, the memory referred to in the embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory.
The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory.
It should be understood that the above memories are exemplary but not limiting illustrations, for example, the memories in the embodiments of the present application may also be Static Random Access Memory (SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM, ESDRAM), Synchronous Link DRAM (SLDRAM), direct rambus RAM (DR RAM), and the like.
It is to be understood that the terminology used in the embodiments of the present application and the appended claims is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application.
For example, as used in the examples of this application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the embodiments of the present application.
If implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially implemented or make a contribution to the prior art, or may be implemented in the form of a software product stored in a storage medium and including several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: u disk, removable hard disk, read only memory, random access memory, magnetic or optical disk, etc. for storing program codes.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses, devices and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed electronic device, apparatus and method may be implemented in other ways.
For example, the division of a unit or a module or a component in the above-described device embodiments is only one logical function division, and there may be other divisions in actual implementation, for example, a plurality of units or modules or components may be combined or may be integrated into another system, or some units or modules or components may be omitted, or not executed.
Also for example, the units/modules/components described above as separate/display components may or may not be physically separate, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the units/modules/components can be selected according to actual needs to achieve the purposes of the embodiments of the present application.
Finally, it should be noted that the above shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The above description is only a specific implementation of the embodiments of the present application, but the scope of the embodiments of the present application is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the embodiments of the present application, and all the changes or substitutions should be covered by the scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.

Claims (17)

1. The utility model provides a fingerprint recognition device under screen which characterized in that is applied to in the electronic equipment who has backlight unit and liquid crystal display panel, backlight unit is located liquid crystal display panel's below, liquid crystal display panel includes display area and non-display area, be provided with fingerprint detection area on the display area, fingerprint recognition device includes under the screen:
the fingerprint sensor is arranged below a non-display area of the liquid crystal panel, receives an optical signal which is sent by the backlight module and is reflected by a finger above the fingerprint detection area and penetrates through the liquid crystal panel, and generates fingerprint information of the finger according to the received optical signal.
2. The device according to claim 1, further comprising a light emitting unit and a control unit, wherein the light emitting unit is located below a non-display area of the liquid crystal panel,
the control unit is used for controlling the light emitting unit to emit light signals to the fingerprint detection area;
the fingerprint sensor is also used for receiving the light signals emitted by the light-emitting unit and reflected by the finger above the fingerprint detection area, and generating the fingerprint information of the finger according to the received light signals.
3. The device according to claim 2, wherein the control unit is configured to control the light emitting unit to emit a light signal to the fingerprint detection area when the liquid crystal panel is in a screen-off state.
4. The device according to claim 2, wherein the light emitting unit is disposed horizontally or obliquely with respect to the liquid crystal panel such that a light emitting angle of the light emitting unit is aligned with the fingerprint detection area.
5. The device according to claim 4, wherein the inclination angle of the light emitting unit is equal to or greater than 0 ° and equal to or less than 60 °.
6. The device according to claim 4, wherein the inclination angle of the light emitting unit is equal to or greater than 30 ° and equal to or less than 45 °.
7. The device according to any one of claims 2 to 6, wherein the non-display region includes a first target position opposite to a position where the light-emitting unit is located, and the first target position is located at a position where a center position of the fingerprint detection region extends in a length direction of the liquid crystal panel.
8. The device according to any one of claims 2 to 6, wherein the light emitting unit includes a first light emitting unit and a second light emitting unit, the non-display region includes a second target position opposite to a position where the first light emitting unit and the second light emitting unit are located, and the second target position is located on both sides of a position where a center position of the fingerprint detection region extends in a length direction of the liquid crystal panel.
9. An underscreen fingerprint identification device according to any one of claims 2-6 wherein the control unit is further configured to control the light emitting unit to emit a light signal in synchronization with the fingerprint sensor receiving the light signal reflected by the finger.
10. An underscreen fingerprint recognition apparatus according to any one of claims 1-6, further comprising:
the reflector is positioned below the non-display area of the liquid crystal panel and used for reflecting the optical signal reflected by the finger;
the optical lens is positioned below a non-display area of the liquid crystal panel and used for focusing the optical signal reflected by the reflector to the fingerprint sensor;
and the photosensitive surface of the fingerprint sensor faces the reflecting surface of the reflector and is used for generating fingerprint information of the finger according to the optical signal focused by the optical lens.
11. The device of claim 10, wherein the light-sensitive surface of the fingerprint sensor faces away from the liquid crystal panel, the light-reflecting surface of the reflector faces the light-sensitive surface of the fingerprint sensor, and the optical lens is disposed on a side of the fingerprint sensor for receiving the light signal reflected by the reflector.
12. The device according to claim 10, wherein the non-display area includes a third target position opposite to a position where the reflective mirror and the fingerprint sensor are located, and the third target position is located at a position where a center position of the fingerprint detection area extends in a longitudinal direction of the liquid crystal panel.
13. The device for identifying fingerprints of claim 10, wherein an included angle between an optical axis of the optical lens and the liquid crystal panel is 0-30 °.
14. The device according to claim 10, wherein an angle between an optical axis of the optical lens and the liquid crystal panel is 15 °.
15. The utility model provides a fingerprint recognition device under screen which characterized in that is applied to in the electronic equipment who has backlight unit and liquid crystal display panel, backlight unit is located liquid crystal display panel's below, liquid crystal display panel includes display area and non-display area, be provided with fingerprint detection area on the display area, fingerprint recognition device includes under the screen:
a light emitting unit disposed below a non-display region of the liquid crystal panel;
a control unit for controlling the light emitting unit to emit a light signal to the fingerprint detection area;
the fingerprint sensor is arranged below the non-display area of the liquid crystal panel, receives the light signals which are sent by the light-emitting unit, reflected by the finger above the fingerprint detection area and penetrate through the liquid crystal panel, and generates the fingerprint information of the finger according to the received light signals.
16. An electronic device supporting underscreen fingerprint recognition, comprising:
the underscreen fingerprint identification apparatus of claims 1-14;
the liquid crystal display panel comprises a display area and a non-display area, wherein the display area is provided with a fingerprint detection area;
and the backlight module is positioned below the liquid crystal panel.
17. An electronic device supporting underscreen fingerprint recognition, comprising:
the liquid crystal display panel comprises a display area and a non-display area, wherein the display area is provided with a fingerprint detection area;
the backlight module is positioned below the liquid crystal panel;
a light emitting unit located below a non-display region of the liquid crystal panel;
a control unit for controlling the light emitting unit to emit a light signal to the fingerprint detection area;
the fingerprint sensor is positioned below the non-display area of the liquid crystal panel and used for receiving optical signals which are sent by the light-emitting unit, reflected back by the finger above the fingerprint detection area and penetrate through the liquid crystal panel, and generating fingerprint information of the finger according to the received optical signals.
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