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CN110235143A - Shield lower fingerprint identification device and electronic equipment - Google Patents

Shield lower fingerprint identification device and electronic equipment Download PDF

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Publication number
CN110235143A
CN110235143A CN201980000677.6A CN201980000677A CN110235143A CN 110235143 A CN110235143 A CN 110235143A CN 201980000677 A CN201980000677 A CN 201980000677A CN 110235143 A CN110235143 A CN 110235143A
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CN
China
Prior art keywords
fingerprint
identification device
optical
light
fingerprint identification
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CN201980000677.6A
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Chinese (zh)
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CN110235143B (en
Inventor
葛丛
蔡斐欣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Goodix Technology Co Ltd
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Shenzhen Huiding Technology Co Ltd
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Publication of CN110235143A publication Critical patent/CN110235143A/en
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Publication of CN110235143B publication Critical patent/CN110235143B/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/4805—Shape
    • H01L2224/4809—Loop shape
    • H01L2224/48091—Arched

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Image Input (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

Fingerprint identification device and electronic equipment under a kind of screen, are able to ascend optical finger print recognition performance under LCD screen.Fingerprint identification device is set to below the backlight module of liquid crystal display under the screen, comprising: optical module and light detection array；The optical module is set to the obliquely downward of fingerprint detection zone in the liquid crystal display；Wherein, the optical module is used to the particular fingerprint detection signal by the backlight module being transmitted to the light detection array；The particular fingerprint detection signal is optical signal of the fingerprint detection signal after the prism film side refraction in the first prism film side and the second prism film side of prism film in the backlight module；The fingerprint detection signal is the optical signal of finger reflection or scattering and return through the fingerprint detection overlying regions, for detecting the finger print information of the finger.

Description

Shield lower fingerprint identification device and electronic equipment
Technical field
This application involves optical finger print technical fields, and more particularly, to fingerprint identification device and electricity under a kind of screen Sub- equipment.
Background technique
With the development of biological identification technology, shield lower fingerprint identification technology in portable terminals such as mobile phones using increasingly Extensively.Currently, the passive types such as liquid crystal display (liquid crystal display, LCD) screen show that screen passes through backlight module Light source is provided, various film layer structures can have severe jamming to the fingerprint optical imagery for shielding lower fingerprint identification device in backlight module, The commercialization of fingerprint identification technology under the screen based on LCD display is caused to be obstructed.
Therefore, how to promote optical finger print recognition performance under LCD screen is this field technical problem urgently to be solved.
Summary of the invention
The embodiment of the present application provides fingerprint identification device and electronic equipment under a kind of screen, is able to solve LCD backlight mould group The problem of having an impact to fingerprint optical imagery improves fingerprint imaging quality.
In a first aspect, fingerprint identification device under a kind of screen is provided, for being arranged under the backlight module of liquid crystal display Side is to carry out shielding lower fingerprint detection, comprising: optical module and light detection array；
The optical module is set to the obliquely downward of fingerprint detection zone in the liquid crystal display；
Wherein, the optical module is used to receive fingerprint detection signal by the first rib of prism film in the backlight module The particular fingerprint formed after prism film side refraction in mirror film side and the second prism film side detects signal, and will The particular fingerprint detection signal is transmitted to the light detection array；
The light detection array detects the particular fingerprint at signal for receiving the particular fingerprint detection signal Reason is fingerprint image signal；
Wherein, the fingerprint detection signal is that the finger through the fingerprint detection overlying regions reflects or scatters and return Optical signal, for detecting the finger print information of the finger.
The technical solution of the embodiment of the present application, by the way that the fingerprint detection region is arranged in obliquely downward in the optical module Side receives the particular fingerprint by the prism film side refraction in a direction in prism film in the backlight module and detects signal, To avoid receiving the optical signal by the prism film side refraction of both direction in prism film, fingerprint image is caused to occur dark Area and distortion solve the problems, such as that LCD backlight mould group has an impact fingerprint optical imagery, improve fingerprint image quality and fingerprint Recognition performance.
In one possible implementation, the fingerprint detection region is located at the side of the optical axis of the optical module.
In one possible implementation, the fingerprint detection region and the optical module are in the light detection array Projection no overlap in the plane.
In one possible implementation, the fingerprint detection region is located at the field of view edge area of the optical module Domain.
In one possible implementation, the light detection array is set on the optical axis of the optical module or institute State the side of optical axis in optical module.
In one possible implementation, the part of the side of the optical axis of the optical module is described specific for receiving Fingerprint detection signal, the light detection array are set to the other side of the optical axis of the optical module.
In one possible implementation, fingerprint identification device under the screen further include:
Reflection unit is set to below the optical module, for the particular fingerprint to be detected signal reflex to described Optical module.
In one possible implementation, the light detection array is set to above the optical module.
In one possible implementation, the reflection unit is parallel with the backlight module.
In one possible implementation, plane where the reflection unit and backlight module place plane are in folder Angle.
In one possible implementation, the position of the optical module make the optical module do not receive by Optical signal in the prism film after the refraction of another prism film side.
In one possible implementation, the position of the light detection array make the light detection array received less than Optical signal after another prism film side refraction in the prism film.
In one possible implementation, the optical module is extrawide angle lens group.
In one possible implementation, the extrawide angle lens group includes one or more lens, it is one or The surface of multiple lens is spherical surface or aspherical.
In one possible implementation, the fingerprint detection region is more than or equal to 5cm*5cm.
In one possible implementation, fingerprint identification device under the screen further include:
Wave filtering layer is set in the optical path between the backlight module and the light detection array, non-targeted for filtering The optical signal of wave band, through the optical signal of target wave band.
In one possible implementation, fingerprint identification device under the screen further include:
Fixation kit, for the optical module and the light detection array to be fixed below the backlight module.
In one possible implementation, which is characterized in that further include:
Infrared light supply, it is described infrared for providing infrared excitation light for the fingerprint detection of fingerprint identification device under the screen Excitation light is irradiated at least partly display area of the liquid crystal display, and at least partly display area at least partly covers The fingerprint detection region of fingerprint identification device under the screen；
Wherein, the particular fingerprint detection signal includes that the infrared excitation light of the infrared light supply passes through after finger reflects Cross the particular fingerprint detection infrared signal of the backlight module.
In one possible implementation, the infrared light supply is set to the field of view edge region of the optical module.
In one possible implementation, the infrared light supply is single or more infrared light-emitting diodes；
Described single or more infrared light-emitting diodes are distributed in the surrounding in the fingerprint detection region.
Second aspect provides a kind of electronic equipment, including liquid crystal display and such as first aspect or first aspect Fingerprint identification device under screen in any possible implementation, wherein the liquid crystal display includes backlight module, the screen Lower fingerprint identification device is set to below the backlight module.
In one possible implementation, the electronic equipment further include:
Infrared light supply, it is described infrared for providing infrared excitation light for the fingerprint detection of fingerprint identification device under the screen Excitation light is irradiated at least partly display area of the liquid crystal display, and at least partly display area at least partly covers The fingerprint detection region of fingerprint identification device under the screen；
Wherein, the particular fingerprint detection signal includes that the infrared excitation light of the infrared light supply passes through after finger reflects Cross the particular fingerprint detection infrared signal of the backlight module.
In one possible implementation, the infrared light supply is set to the field of view edge region of the optical module.
In one possible implementation, the infrared light supply is single or more infrared light-emitting diodes；
Described single or more infrared light-emitting diodes are distributed in the surrounding in the fingerprint detection region.
In one possible implementation, the infrared light supply is arranged under the glass cover-plate of the liquid crystal display Side, and be arranged side by side with the liquid crystal display panel of the liquid crystal display.
In one possible implementation, the infrared light supply bias laid is in the lower section of the glass cover-plate.
In one possible implementation, fingerprint identification device under the screen further include: infrared light layer is set to Between the infrared light supply and the glass cover-plate and/or between the infrared light supply and the liquid crystal display, for penetrating The infrared excitation light and blocking visible light.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the electronic equipment that the embodiment of the present application is applicable in.
Fig. 2 is the schematic diagram of fingerprint identification device under a kind of screen provided by the embodiments of the present application.
Fig. 3 is another schematic diagram for shielding lower fingerprint identification device provided by the embodiments of the present application.
Fig. 4 is another schematic diagram for shielding lower fingerprint identification device provided by the embodiments of the present application.
Fig. 5 is another schematic diagram for shielding lower fingerprint identification device provided by the embodiments of the present application.
Fig. 6 a and Fig. 6 b are the schematic isometric structure chart and sectional view of prism film in the display screen of the embodiment of the present application.
Fig. 7 is the schematic block diagram of electronic equipment provided by the embodiments of the present application.
Specific embodiment
As intelligent terminal steps into comprehensive screen epoch, the extruding that electronic equipment front fingerprint collecting region is shielded comprehensively, Therefore shield under (Under-display or Under-screen) fingerprint identification technology more and more attention has been paid to.Shield lower fingerprint to know Other technology refers to that will shield lower fingerprint identification device (such as fingerprint recognition mould group) is mounted below display screen, is showing to realize Fingerprint recognition operation is carried out inside the display area of screen, is not needed the region setting in electronic equipment front in addition to display area and is referred to Line pickup area.
Shield lower fingerprint identification technology may include shield lower optical fingerprint identification technology, shield lower ultrasonic fingerprint identification technology or Fingerprint identification technology under the other kinds of screen of person.
For shielding lower optical fingerprint identification technology, shields lower optical fingerprint identification technology and use from the top of equipment display component The light that face returns incudes and other inductive operations to carry out fingerprint.The light of the return carries the object contacted with the top surface The information of (such as finger), the light by capturing and detecting the return realize that the particular optical being located at below display screen senses Device module carries out shielding lower optical finger print identification.The design of the particular optical sensor module can be for by properly configuring use Desired optical imagery is realized in the optical element for the light that capture and detection return.
It should be understood that the technical solution of the embodiment of the present application can be applied to various electronic equipments, more specifically, can apply In the electronic equipment with display screen.Such as smart phone, laptop, tablet computer, game station etc. are portable or move It is dynamic to calculate equipment and electronic databank, automobile, ATM (automatic teller machine) (automated teller machine, ATM) etc. Other electronic equipments, but the embodiment of the present application does not limit this.
It should also be understood that the technical solution of the embodiment of the present application other than it can carry out fingerprint recognition, can also carry out other Living things feature recognition, for example, vivo identification etc., the embodiment of the present application does not also limit this.
Below in conjunction with attached drawing, technical solutions in the embodiments of the present application is described.
It should be noted that for purposes of illustration only, identical appended drawing reference indicates identical portion in embodiments herein Part, and for sake of simplicity, in different embodiments, omit the detailed description to same parts.
It should be understood that the thickness of the various parts in the embodiment of the present application shown in attached drawing, length and width equidimension, and screen finger down The integral thickness of line identification device, length and width equidimension are merely illustrative, and constitute any restriction without coping with the application.
The structural schematic diagram for the electronic equipment that can be applicable in for the embodiment of the present application as shown in Figure 1, the electronic equipment 1 wrap It includes display screen 10 and shields lower fingerprint identification device 20, wherein fingerprint identification device 20 is arranged in the display screen 10 under the screen The regional area of lower section.
As a kind of optional implementation, as shown in Figure 1, fingerprint identification device 20 includes optical module under the screen 300 and light detection array 400, the light detection array 400 and the reading circuit being electrically connected with the light detection array and Other auxiliary circuits can be produced on a chip (Die), such as optical imagery chip or light by semiconductor technology Fingerprint sensor is learned, the induction arrays are specially optical detector (Photo detector) array comprising multiple is in array The optical detector of formula distribution, the optical detector can be used as pixel unit as described above；The optical module 300 can be set It sets in the top of the light detection array 400.400 region of light detection array or its induction region are under the screen The fingerprint detection region 103 of fingerprint identification device 20.As shown in Figure 1, the fingerprint detection region 103 is located at the display screen 10 Display area among.
In a kind of alternate embodiment, other positions, such as institute can also be arranged in fingerprint identification device 20 under the screen State the non-transparent region in edge of the side or the electronic equipment 1 of display screen 10, and by light path design by the display The optical signal of at least partly display area of screen 10 directs into fingerprint identification device 20 under the screen, so that the fingerprint is examined Survey the display area that region 103 is physically located the display screen 10.
It should be appreciated that the area in the fingerprint detection region 103 can be examined with the light of fingerprint identification device 20 under the screen The area for surveying array 400 is different, for example, for example, by the light path design of lens imaging, reflective folding light path design or other The light path designs such as light convergence or reflection, can make the fingerprint detection region 103 of fingerprint identification device 20 under the screen Area is greater than the area of the light detection array 400.In other substitution implementations, if using such as light collimating fashion Optical path guidance is carried out, the fingerprint detection region 103 of fingerprint identification device 20 can also be designed to refer to under the screen under the screen The area of the induction arrays of line identification device 20 is almost the same.
Therefore, user is when needing to be unlocked the electronic equipment or other fingerprint authentications, it is only necessary to By finger pressing in the fingerprint detection region 103 for being located at the display screen 10, it can realize that fingerprint inputs.Due to fingerprint detection Can be realized under screen, thus electronic equipment 1 using the above structure be arranged without its special reserved space in front fingerprint by Key (such as Home key), so as to which using screen scheme comprehensively, i.e., the display area of the described display screen 10 can extend substantially to The front of entire electronic equipment 1.
In specific implementation, the optical module 300 can be encapsulated in the same optics with the light detection array 400 and refer to Line component.For example, the optical module 300 can be encapsulated in the same optical finger print chip with the light detection array 400, The optical module 300 can be arranged in the chip exterior where the light detection array 400, than optical module as will be described 300 are fitted in above the chip, or the subelement of the optical module 300 is integrated among said chip.
It should be understood that the electronic equipment 1 further includes transparency protected cover board 130, the cover board in specific implementation It can be glass cover-plate or sapphire cover board, be located at the top of the display screen 10 and cover the electronic equipment 1 just Face.Because in the embodiment of the present application, so-called finger pressing actually refers to pressing in the display screen in the display screen 10 The cover board of 10 tops or the protective layer of the covering cover board.
It should be appreciated that the lower section for shielding lower fingerprint identification device 20 is also provided with circuit board 150.Shield lower fingerprint recognition dress Setting 20 can be bonded on the circuit board 150 by gum, and real by pad and metal wire bonding and the circuit board 150 Now it is electrically connected.Shielding lower fingerprint identification device 20 can be realized and other peripheral circuits or electronic equipment 1 by circuit board 150 Other elements electrical interconnection and signal transmission.For example, electricity can be received by circuit board 150 by shielding lower fingerprint identification device 20 The control signal of the processing unit of sub- equipment 1, and fingerprint identification device 20 can also will be descended from screen by circuit board 150 Fingerprint detection electric signal exports processing unit or control unit of electron equipment 1 etc..
It should be noted that the optical finger print device in the embodiment of the present application be referred to as optical finger print identification mould group, Fingerprint identification device, fingerprint recognition mould group, fingerprint mould group, fingerprint acquisition device etc., above-mentioned term can be replaced mutually.
It should be noted that when the display screen 10 is the display screen with spontaneous light display unit, for example OLED is shown Screen or micro-led (Micro-LED) display screen.For using OLED display screen, fingerprint recognition is filled under the screen It sets 20 and can use the OLED display screen 10 and be located at the display unit (i.e. OLED light source) in the fingerprint detection region 103 to make For the excitation light source of optical finger print detection.Display screen 10 issues one to the target finger 140 of 103 top of fingerprint detection region Shu Guang, the light reflect to form reflected light on the surface of finger 140 or are formed scattered by 140 scattering-in of finger Light is penetrated, in the related patent applications, for ease of description, above-mentioned reflected light and scattering light are referred to as reflected light.Due to the ridge of fingerprint (ridge) different for the albedo of light from valley (valley), therefore, reflected light from fingerprint ridge and from fingerprint valley Reflected light has different light intensity, light detection battle array of the reflected light after optical module 300, under being shielded in fingerprint identification device 20 Column 400 are received and converted to corresponding electric signal, i.e. fingerprint detection electric signal；It can based on the fingerprint detection electric signal Fingerprint image data is obtained, and can be verified with further progress fingerprint matching, to realize that optics refers in the electronic equipment 1 Line identification function.
And when the display screen 10 is display screen without spontaneous light display unit, such as liquid crystal display or its His passive light emitting display is needed using light source of the backlight module as display screen 10.To apply with backlight module and For the liquid crystal display of liquid crystal display panel, fingerprint detection under the screen to support liquid crystal display, as shown in Figure 1, the display screen 10 include liquid crystal display panel 110 and backlight module 120, and the backlight module is used to issue optical signal to the liquid crystal display panel, described Liquid crystal display panel 110 includes liquid crystal layer and control circuit, for controlling the deflection of liquid crystal through optical signal.The electronic equipment 1 can also include the excitation light source 160 for optical finger print detection, and fingerprint identification device 20 is arranged in the backlight under the screen The lower section of mould group 120, when the pressing of finger 140 is at the fingerprint detection region 103, excitation light source 160 is to the fingerprint detection area The target finger 140 of 103 top of domain issues excitation light 111, which reflects to form finger on the surface of finger 140 First reflected light 151 of line ridge and second reflected light 152 in fingerprint valley, the first reflected light 151 and the second reflected light 152 need by Light detection after liquid crystal display panel 110 and backlight module 120, after optical module 300, under being shielded in fingerprint identification device 20 The be received and converted to fingerprint detection electric signal of array 400.
In the process, since there are the films such as prism film 121 and backlight module other structures 124 in backlight module 120 Layer can cause larger interference to the imaging for shielding lower fingerprint identification device 20.For example, as shown in Fig. 2, third reflected light 153 is warp The fingerprint detection optical signal of the reflection of finger central area or transmission is crossed, the finger centre region corresponds to fingerprint detection region 103 Central area, fingerprint identification device 20 is set to below the central area in fingerprint detection region 103 under the screen, the third Reflected light 153 is refracted as the different first refractive light 161 and second in direction by the prism film side of both direction in prism film 121 Light 162 is reflected, the first refractive light 161 and the second refraction light 162 cannot be introduced into optical module 300 and is imaged.Therefore, hand The optical signal at finger center can not be received by light detection array 400, and the light detection array 400 detects obtained fingerprint image center It will form a dark space, serious visual field caused to be lost.In addition, the 4th reflected light 154 and the 5th reflected light 155 are to examine through fingerprint The fingerprint detection optical signal of the finger reflection or transmission above the fringe region in region 103 is surveyed, the 4th reflected light 154 is passed through A side in prism film forms third reflect light 163, and the 5th reflected light 155 is by the other side side in prism film Fourth reflect light 164 is formed, the third reflect light 163 is with fourth reflect light 164 into optical module 300 and by the optics Component 300 is transmitted to the light detection array 400, and the same area in the light detection array 400 is imaged, and causes to refer to Print image distortion.Therefore, because influence of the prism film for optical signal, causes visual field loss and pattern distortion, thus can not be real Now shield lower fingerprint recognition.
The application provides fingerprint device under a kind of screen, and fingerprint device is set to the oblique of the fingerprint detection region under the screen Lower section, the light detection array received avoid heart appearance in the picture by the refraction light after the side refraction in prism film Dark space and distortion, to improve optical finger print recognition performance under LCD screen.
Hereinafter, the fingerprint identification device of the embodiment of the present application is discussed in detail in conjunction with Fig. 3 to Fig. 5.
Fig. 3 is the schematic diagram of fingerprint identification device 20 under a kind of screen provided by the embodiments of the present application, is suitable for tool There is the electronic equipment of liquid crystal display.
As shown in figure 3, fingerprint identification device 20 is used to be arranged in the backlight module of the liquid crystal display 10 under the screen 120 lower sections are to carry out shielding lower fingerprint detection, wherein the backlight module 120 includes prism film (brightness Enhancement film, BEF) 121；Fingerprint identification device 20 may include: optical module 300 and light detection battle array under the screen Column 400；
The optical module 300 is set to the obliquely downward of fingerprint detection zone 103 in the liquid crystal display 10；
Wherein, the optical module 300 is for receiving fingerprint detection signal by the one of prism film of the prism film The particular fingerprint formed after the refraction of side detects signal, and particular fingerprint detection signal is transmitted to the light detection battle array Column 400；
The particular fingerprint is detected and is believed for receiving the particular fingerprint detection signal by the light detection array 400 Number processing be fingerprint image signal；
Wherein, the fingerprint detection signal is that the finger through 103 top of fingerprint detection region reflects or scatters and return The optical signal returned, for detecting the finger print information of the finger.
Specifically, in the embodiment of the present application, the optical module 300 can be optical lens (Lens) layer, have One or more lens units, such as the lens group of one or more optical lens compositions, are used to reflect from finger Reflected light converge to light detection array 400 below so that the light detection array 400 can be based on the reflected light It is imaged, to obtain the fingerprint image of the finger.Optionally, the surface of the optical lens in the optical lens mirror layer can Think spherical surface or aspherical.Optionally, the material of the optical lens can be glass, the transparent materials such as resin.
Specifically, in the embodiment of the present application, the light detection array 400 includes multiple sensing units.The light detection Array 400 reflects the specific of formation later by finger reflection and the one of prism film side of the prism film for receiving Particular fingerprint detection signal processing is simultaneously obtained a fingerprint image signal by fingerprint detection signal, wherein an induction is single Member receives a cell signal in the particular fingerprint detection signal, and is a fingerprint image list by cell signal processing First signal, the fingerprint image cell signal are a unit pixel in fingerprint image signal.Optionally, the sensing unit can be with Using photodiode (photo diode), metal oxide semiconductor field effect tube (metal oxide Semiconductor field effect transistor, MOSFET) etc. devices.Optionally, the sensing unit is for spy Wavelength light luminous sensitivity with higher and higher quantum efficiency are determined, in order to detect the optical signal of respective wavelength.
In the embodiment of the present application, the fingerprint detection region 103 is the light detection array 400 in the liquid crystal display For the pressing of induction region in screen 10, i.e. user's finger at the fingerprint detection region 103, excitation optical signal passes through the fingerprint The finger reflection of 103 top of detection zone scatters and returns to fingerprint detection signal, and the fingerprint detection signal is used to detect institute State the finger print information of finger, the light detection array 400 to the finger of 103 top of fingerprint detection region carry out fingerprint at Picture.
Optionally, in a kind of possible embodiment, fingerprint identification device 20 includes an optical finger print under the screen Sensor, the light detection array 400 are the induction arrays in an optical fingerprint sensor, at this time fingerprint detection region 103 Area it is smaller and position is fixed.
Optionally, in other alternate embodiments, fingerprint identification device 20 can specifically include multiple optics under the screen Fingerprint sensor；The light detection array 400 is the induction arrays in multiple optical fingerprint sensors, the multiple optical finger print Sensor can be disposed side by side on the lower section of the liquid crystal display 10 by connecting method, and the multiple optical finger print senses The induction region of device collectively forms the fingerprint detection region 103 of fingerprint identification device 20 under the screen.In other words, under the screen Fingerprint identification device 20 may include multiple sub fingerprint detection zones, and each sub fingerprint detection zone corresponds respectively to one of them The induction region of optical fingerprint sensor, so that the fingerprint detection region 103 for shielding lower fingerprint identification device 20 can extend to The main region of the lower half portion of the display screen expands to the usual pressing area of finger, to realize blind defeated by formula fingerprint Enter operation.Alternatively, when the optical fingerprint sensor quantity is enough, the fingerprint inspection of fingerprint identification device 20 under the screen Surveying region 103 can be extended to half of display area even entire display area, to realize half screen or the inspection of full frame fingerprint It surveys.
In the embodiment of the present application, the optical module 300 is set to fingerprint detection zone in the liquid crystal display 10 103 obliquely downward；Optionally, in a kind of possible embodiment, the optical module 300 is arranged in the fingerprint detection area In the lower section view field in domain 103, it can specifically be located at the edge of the lower section view field in the fingerprint detection region 103, institute The lower section view field and the optical module 300 for stating fingerprint detection region 103 can partially overlap or overlap completely；It is optional Ground, in alternatively possible embodiment, the optical module 300 is not disposed on the lower section in the fingerprint detection region 103 In view field, the lower section view field in the fingerprint detection region 103 and the optical module 300 can be with no overlaps.
Specifically, as shown in figure 4, the liquid crystal display 10 includes liquid crystal display panel 110, backlight module 120 and glass Cover board 130.The fingerprint detection region 103 can be glass of the light detection array 400 in the liquid crystal display 10 Induction region on cover board.
In the embodiment of the present application, as shown in Figure 3 and Figure 4, the backlight module 120 in the liquid crystal display 10 includes rib Mirror film 121 and backlight module other structures 124, wherein backlight module other structures 124 include but is not limited to polarizing film, diffusion The back light module unit structures such as piece, light guide plate and reflector plate.Specifically, Fig. 6 a and Fig. 6 b show prism film in the embodiment of the present application 121 three-dimensional structure diagram and sectional view, the prism film 121 are that multiple identical prism units 1210 are advised in substrate 1220 It is arranged in a row to rule, wherein each prism unit 1210 is protruding upward from substrate 1220 and is formed, and each prism Unit 1210 is the structure having there are two inclined side list source, has angle between two inclined sides, is prism unit 1210 Apex angle (apex angle).For example, the section of prism unit 1210 is triangle shown in Fig. 6 b, prism unit 1210 is class It is similar to the structure of prism.Specifically, the inclined side of multiple prism units 1220, which is connected, constitutes the upper table of the prism film 121 Face, wherein as shown in figures 6 a and 6b, two inclined sides are respectively the first inclined side unit 1221 in prism unit 1210 With the second inclined side unit 1231, multiple first inclined side units 1221 and multiple second inclined side units 1231 are each other It is spaced apart from each other setting, forms the multiple first inclined side units 1221 being parallel to each other in prism film 121, and be parallel to each other Multiple second inclined side units 1231.The multiple the first inclined side unit 1221 being parallel to each other is the prism film 121 the first prism film side 122, the multiple the second inclined side unit 1231 being parallel to each other are the prism film 121 The second prism film side 123.
In the embodiment of the present application, the particular fingerprint detection signal can pass through the first prism film for fingerprint detection signal The optical signal that any one prism film side reflects in side or the second prism film side, optionally, the particular fingerprint inspection Surveying signal is the optical signal reflected by first prism film side 122.For example, as shown in Figure 3 and Figure 4,201 He of optical signal Optical signal 202 be through above fingerprint detection edges of regions finger areas reflect or scattering generate the first fingerprint detection signal and Second fingerprint detection signal, the first fingerprint detection signal 201 and the second fingerprint detection signal 202 pass through the first rib Mirror film side 122 generates the first particular fingerprint detection signal 211 and the second particular fingerprint detection signal 212 after reflecting.
Since first prism film side 122 and the second prism film side 123 are by the fingerprint in same or similar direction Detection signal is refracted as the different refracted optical signal of both direction, therefore in the embodiment of the present application, optical module 300 is set to The obliquely downward in the fingerprint detection region 103 receives a specific direction refracted optical signal in both direction refracted optical signal I.e. particular fingerprint detects signal, and particular fingerprint detection signal is transmitted to light detection array 400.
In the embodiment of the present application, by the way that the fingerprint detection region 103 is arranged in obliquely downward in the optical module 300 Side receives the particular fingerprint by the prism film side refraction in a direction in prism film in the backlight module and detects signal, To avoid receiving the optical signal by the prism film side refraction of both direction in prism film, fingerprint image is caused to occur dark Area and distortion improve fingerprint image quality and fingerprint recognition performance.
Optionally, as shown in Figure 3 and Figure 4, the fingerprint detection region 103 is located at the one of the optical axis of the optical module Side.
Optionally, the visual field region (filed of view, FOV) of the optical module 300 is greater than the fingerprint detection area Domain 103, the received particular fingerprint of the light detection array 400 detect in the optical signal that signal is the optical module 300 transmission A part.Specifically, in the embodiment of the present application, the field of view of the optical module 300 is that the optical module 300 exists Field of view in the liquid crystal display.
Optionally, the fingerprint detection region 103 is located at the field of view edge region of the optical module 300.The optics The field of view edge region of component 300 is located in the field of view of the optical module 300, and the center in the field of view edge region Be more than or equal to first threshold at a distance from the center of the field of view, for example, first threshold is the field of view radius 4/5, it should be appreciated that the first threshold can also be 3/4 or other values of the field of view radius, the embodiment of the present application pair This does not do any restriction.
Optionally, the optical module 300 is put down where the light detection array 400 with the fingerprint detection region 103 Projection no overlap on face.
It should be understood that the optical module 300 is put down where the light detection array 400 with the fingerprint detection region 103 Projection on face can also have overlapping region, but 400 reception particular fingerprints of the light detection array detect signal, can not receive Non-specific fingerprint detects signal, i.e., can not receive the fingerprint detection signal reflected by two prism film sides of prism film simultaneously.
In the embodiment of the present application, the non-specific fingerprint detection signal includes by prism film in the backlight module The optical signal after the refraction of another prism film side in first prism film side and the second prism film side.Optionally, described The position of optical module 300 makes the optical module 300 not receive the non-fingerprint detection signal.
For example, as shown in Figure 3 and Figure 4, the non-specific fingerprint detection signal includes passing through 123 folding of the second prism film side The optical signal penetrated.The position of the optical module 300 does not receive the optical module 300 by the second prism film side The optical signal of 123 refractions.
Optionally, the part of the side of optical axis is used to receive the particular fingerprint detection signal in the optical module 300, The light detection array 400 is set to the other side of optical axis in the optical module.
For example, as shown in Figure 3 and Figure 4, the first particular fingerprint detects signal 211 and second particular fingerprint detects signal 212 are incident to the side of 300 optical axis of optical module, and the light detection array 400 is located at 300 optical axis of optical module The other side.
It should be understood that the particular fingerprint detection signal by fingerprint detection region 103 can all be incident to the ultra-wide angle The side of 300 optical axis of lens group, at this point, the light detection array 400 can be located at the another of 300 optical axis of extrawide angle lens group Side.It can be with portions incident to 300 light of extrawide angle lens group by the particular fingerprint detection signal in fingerprint detection region 103 The side of axis, portions incident to the other side of 300 optical axis of extrawide angle lens group, at this point, the light detection array 400 can be with On 300 optical axis of extrawide angle lens group, the embodiment of the present application is not limited this.
Optionally, in the embodiment of the present application, the position of the light detection array 400 makes the light detection array 400 The non-specific fingerprint detection signal is not received.
For example, as shown in Figure 3 and Figure 4, the non-specific fingerprint detection signal includes passing through 123 folding of the second prism film side The optical signal penetrated.The position of the light detection array 400 does not receive the light detection array 400 by the second prism film The optical signal that side 123 reflects.
Optionally, in a kind of possible embodiment, the optical module 300 is extrawide angle lens group, described super wide It include one or more bugeye lenses in minus lens group.Optionally, the visual field of the extrawide angle lens group is greater than the fingerprint Detection zone 103.Optionally, the visual field scope of the extrawide angle lens group is between 120 ° to 180 °.For example, such as Fig. 4 institute Show, the optical module 300 is the extrawide angle lens group of 2 optical lenses composition.
Optionally, the optical lens mirror layer can also be formed with pin hole, the pin hole in the optical path of the lens unit The optical lens mirror layer can be cooperated to expand the visual field of the optical finger print device, to improve fingerprint identification device 20 under the screen Fingerprint imaging effect.
Optionally, the fingerprint detection region 103 is the square more than or equal to 5cm*5cm.
Optionally, increase the object space focal length of the optical module 300, the front focal length of the also referred to as described optical module 300, from And increase the distance of the optical module 300 to the fingerprint detection region 103, to expand the visual field of the optical module 300. By expanding the visual field of the optical module 300 and increasing the area of the light detection array 400, the fingerprint can be increased The area of detection zone 103 improves the performance of the fingerprint recognition to increase the area of fingerprint image.
Optionally, as shown in figure 4, under the screen fingerprint recognition device 20 further include:
Wave filtering layer 500, for filtering the optical signal of non-targeted wave band, through optical signal (the i.e. fingerprint image of target wave band The optical signal of wave band needed for acquiring), the influence of the ambient light signal of non-targeted wave band is advantageously reduced, so as to promote fingerprint Recognition performance.
Optionally, the wave filtering layer 500 is set to the light between the backlight module 120 and the light detection array 400 Lu Zhong.For example, the wave filtering layer 500 can be set between the backlight module 120 and the optical module 300, Huo Zhesuo Stating wave filtering layer 500 can be set between the optical module 300 and the light detection array 400.
Optionally, the wave filtering layer 500 can be fitted in 400 top of light detection array, the patch by joint adhesive Closing glue has high transmittance and low-refraction.
Optionally, the wave filtering layer 500 can be integrated in photoelectric sensor chip with the light detection array 400 together In, specifically, can carry out plated film on multiple pixel units of the photoelectric sensor using evaporation process forms the filter Wave layer 500, for example, by the methods of atomic layer deposition, sputter coating, electron beam evaporation deposition, ion beam deposition in the light One layer of filter film is prepared above multiple pixel units of electric transducer.The thickness of wave filtering layer 500 is small in the technical solution In equal to 20 μm.
In the embodiment of the present application, the wave filtering layer 500 can be visible filter, specifically can be used for filtering out visible Optical wavelength, for example, the visible light etc. shown for image.The optical filter specifically may include one or more optical filterings Device, one or more of optical filters are configurable to such as bandpass filters, to filter out the light of visible light source transmitting, Infrared signal is not filtered out simultaneously.One or more of optical filters can be implemented as such as optical filtering coating, the light It learns filtering coatings to be formed on one or more continuous interfacials, or can be implemented as on one or more discrete interfaces.
It should be understood that the wave filtering layer 500 can be produced on the surface of any optical component, or along to via finger In the reflected light reflected to form to the optical path of light detection array 400.Fig. 4 is only arranged with the wave filtering layer 500 in the light For learning between component 300 and the light detection array 400, but the application is without being limited thereto.For example, the wave filtering layer 500 may be used also To be arranged in the backlight module 120.
Optionally, as shown in figure 4, fingerprint identification device 20 under the screen further include:
Circuit board 600 is electrically connected by arrangements of electric connection and fingerprint identification device 20 under the screen.
Optionally, metal pad, the electricity are provided on the light detection array 400 under the screen in fingerprint identification device 20 Attachment device is electrically connected by metal pad with fingerprint identification device 20 under the screen.
Optionally, in a kind of possible embodiment, as shown in figure 4, the circuit board 600 can be flexible circuit board FPC, the arrangements of electric connection can be scolding tin, anisotropic conductive film (anisotropic conductive film, ACF) Or other metal connecting devices.
Optionally, in a kind of possible embodiment, the circuit board 600 can also be printed circuit board (printed Circuit board, PCB), the arrangements of electric connection can be wire bonding (wire bonding, WB) device.For example, institute Stating arrangements of electric connection can be the binding line (bonding wire) that material is golden (Au).The printed circuit board 600 can be set It sets below light detection array 400, or is arranged in parallel with the light detection array 400.
Optionally, the circuit board 600 can be the circuit board 150 in Fig. 1.
Optionally, as shown in figure 4, under the screen fingerprint recognition device 20 further include:
Fixation kit 700, for fixing the optical module 300 and the light detection array 400 in the backlight module 120 lower sections.
Optionally, the fixation kit 700 is also used to for the wave filtering layer 500 being fixed on 120 lower section of backlight module.
Optionally, the fixation kit 700 is also used to control the optical module 300 and the fingerprint detection region 103 The distance between, and for controlling the distance between the optical module 300 and described light detection array 400, convenient for control warp The fingerprint detection signal crossed on the fingerprint detection region 103 is imaged on the light detection array.
Optionally, the fixation kit 700 can be made of metal stamping, it should be appreciated that the fixation kit 700 can be with Material is made by plastics or other fixations to be made, the embodiment of the present application does not limit this.
Optionally, fingerprint identification device 20 under the screen further include: infrared light supply, for being filled for fingerprint recognition under the screen The fingerprint detection set provides infrared excitation light, and the infrared excitation illumination is mapped at least partly viewing area of the liquid crystal display Domain, at least partly display area at least partly cover the fingerprint detection region of fingerprint identification device under the screen；
Wherein, the fingerprint detection signal includes the infrared excitation light of the infrared light supply after finger reflects or scatters Fingerprint detection infrared signal, particular fingerprint detection signal includes the fingerprint detection infrared signal by backlight module The particular fingerprint detection detection infrared signal of prism film side refraction in prism film.
For example, as shown in figure 4, fingerprint identification device 20 further includes infrared light supply 30 under the screen, the infrared light supply 30 For emitting infrared excitation light, the specific direction infrared signal can be for by prism film 121 in the backlight module 120 The first prism film side 121 refraction infrared signal.
Optionally, the infrared light supply 30 can be set in the field of view edge region of the optical module 300.For example, such as Shown in Fig. 4, the fingerprint detection region 103 is located at the field of view edge of the optical module 300, and the infrared light supply 30 is located at Near the fingerprint detection region 103, and the infrared light supply 30 is greater than the finger at a distance from 300 center of optical module The maximum distance of line detection zone 103 and 300 center of optical module.A point in the fingerprint detection region 103 with it is described The distance between 300 center of optical module is greater than B point and 300 center of optical module in the fingerprint detection region 103 The distance between, field of view center of the A point apart from the optical module 300 is remote, and close apart from the infrared light supply 30, B point is apart from institute The field of view center for stating optical module 300 is close, remote apart from the infrared light supply 30, therefore, optics illumination at A point (illumination) the optics illumination being greater than at B point, corresponding, the optics illumination that A point is imaged on light detection array 400 is big In the optics illumination of B point imaging.But due to the imaging characteristics of optical module 300, the optics illumination of field of view center is greater than visual field side The optics illumination of edge, therefore after optical module, the optics illumination that B point is imaged on light detection array 400 is imaged greater than A point Optics illumination.The influence of comprehensive infrared light supply and optical module for image optics illumination, on fingerprint detection region A point and Image optics illumination of the B point on the light detection array 400 is close, advantageously forms a kind of imaging picture of uniform light intensity, Convenient for the extraction of fingerprint signal, the accuracy rate of identification can be effectively improved.
Optionally, in a kind of possible embodiment, the glass in electronic equipment is can be set in the infrared light supply 30 The lower section of cover board 130 is arranged side by side with the liquid crystal display panel 110 of the liquid crystal display, and is set to the back of liquid crystal display 10 The oblique upper of optical mode group 120.
For example, as shown in figure 4, the infrared light supply 30 can by optical cement bias laid below the glass cover-plate 130, Optionally, the optical cement can be any optical liquid rubber or optics solid-state glue.
Optionally, in alternatively possible embodiment, the glass in electronic equipment is can be set in the infrared light supply 30 The lower section of glass cover board 130 is arranged side by side with the liquid crystal display panel 110 and backlight module of liquid crystal display 10, specifically, the back Optical mode group 120 includes prism film 121 and backlight module other structures 124.
Optionally, as shown in figure 4, between the infrared light supply 30 and the glass cover-plate and/or the infrared light supply 50 Infrared light layer 301, the infrared light layer can be set between the liquid crystal display panel 110 in the liquid crystal display 10 301 for through the infrared excitation light and blocking visible light.Optionally, the infrared light layer 301 can be thoroughly infrared Ink.
Optionally, as shown in figure 4, between liquid crystal display panel 110 in the infrared light supply 30 and the liquid crystal display 10 Light blocking foam 302 can be set, for stopping visible light.
Optionally, the non-display area at the electronic equipment edge is arranged in the infrared light supply 30.
Optionally, the infrared light supply 30 can be single or more light emitting diode (light-emitting Diode, LED).Optionally, more infrared light-emitting diodes can form continuous belt ir light emitting source, be distributed in the fingerprint detection The surrounding in region 103.
In the embodiment of the present application, optical finger print inspection is carried out by using the particular fingerprint detection infrared light of infrared light supply It surveys, interference of the screen visible light for infrared light fingerprint detection, and the optics illumination of balanced infrared light fingerprint image can be reduced, Further increase the quality of fingerprint imaging.
Fig. 5 shows another structural schematic diagram for shielding lower fingerprint identification device 20 provided by the embodiments of the present application, such as Fig. 5 Shown, fingerprint identification device 20 can also include reflection unit, such as reflecting mirror or other for reflected light letter under the screen Number device, be set to below the optical module, for the particular fingerprint to be detected signal reflex to the optical module.
Optionally, the light detection array is set to above the optical module.
In a kind of possible embodiment, as shown in figure 5, the fingerprint detection region 103 is located at the optical module 300 upper left side, the light detection array 400 are located at the upper right side of the optical module 300.
It should be understood that when the fingerprint detection region 103 is located at the upper right side of the optical module 300, the light detection Array is located at the upper left side of the optical module 300.
Optionally, the reflection unit 800 can also be fixed on 120 lower section of backlight module by fixation kit 700.
The first particular fingerprint detection signal 211 and the second particular fingerprint detection signal 212 are anti-by reflection unit 800 It after penetrating, is received by the optical module 300, first particular fingerprint is detected signal 211 and the second spy by the optical module Determine fingerprint detection signal 212 and is transmitted to the light detection array 400.
Optionally, as shown in figure 5, the first particular fingerprint detection signal 211 and second particular fingerprint detect signal 212 It is incident to the side of 300 optical axis of optical module, the light detection array 400 is located at the another of 300 optical axis of optical module Side.
It should be understood that the particular fingerprint detection signal by fingerprint detection region 103 can all be incident to the ultra-wide angle The side of 300 optical axis of lens group, at this point, the light detection array 400 can be located at the another of 300 optical axis of extrawide angle lens group Side.It can be with portions incident to 300 light of extrawide angle lens group by the particular fingerprint detection signal in fingerprint detection region 103 The side of axis, portions incident to the other side of 300 optical axis of extrawide angle lens group, at this point, the light detection array 400 can be with On 300 optical axis of extrawide angle lens group, the embodiment of the present application is not limited this.
Optionally, as shown in figure 5, fingerprint identification device 20 also may include filter layer 500 under the screen, circuit board 600, And infrared light supply 30, infrared light layer 301 and light blocking foam 302, specific embodiment may refer to the description in Fig. 4, Details are not described herein again.
When fingerprint identification device 20 uses the infrared light supply 30 as excitation light source, the light detection array under the screen When detecting infrared signal progress fingerprint imaging, the reflection unit has certain reflectivity to infrared light, and reflection unit is anti- The optical wavelength penetrated is more than or equal to 780nm.
Optionally, in the embodiment of the present application, the infrared light supply 30 can be set in the visual field of the optical module 300 Edge, the fingerprint detection region 103 also are located at the field of view edge of the optical module 300.And comprehensive infrared light supply with And influence of the optical module for image optics illumination, A point and B point are on the light detection array 400 on fingerprint detection region Image optics illumination it is close, advantageously form a kind of imaging picture of uniform light intensity, can be effective convenient for the extraction of fingerprint signal Improve the accuracy rate of identification.
Optionally, as shown in figure 5, the reflection unit 800 can be arranged in parallel in 120 lower section of backlight module.
Optionally, the reflection unit 800 can be described with the nonparallel lower section that the backlight module 120 is arranged in Plane where plane where reflection unit and the backlight module is in angle.For example, the backlight module 120 is located at horizontal plane On, the reflection unit 800 is at an angle to the horizontal surface setting.By adjusting the angle of the reflection unit, can increase The area of the photo detection area 103.
In Fig. 5, particular fingerprint detection signal is reflected by reflection unit 800, then by the optics group Part 300 and the light detection array 300 receive, while the object space focal length and visual field for meeting the optical module 300, with figure 4 compare, and are reducing the light detection array 400 and the light detection array 400 to the screen between the optical module 300 On the basis of lower longitudinal space, longitudinal space under optical module 300 to the screen between the backlight module 120 is also reduced, from And reduce the entire screen down space shielding lower fingerprint identification device 20 and occupying.
As shown in fig. 7, the electronic equipment 2 may include liquid crystal the embodiment of the present application also provides a kind of electronic equipment 2 Fingerprint identification device 20 under the screen of display screen 10 and above-mentioned application embodiment, wherein the liquid crystal display 10 includes above-mentioned back Optical mode group 120, fingerprint identification device 20 is set to 120 lower section of backlight module under the screen.
The electronic equipment 2 can be any electronic equipment with liquid crystal display and backlight module.
Optionally, as shown in fig. 7, in the case that fingerprint identification device 20 does not include infrared light supply under screen, the electronics Equipment 2 can also include infrared light supply 30.
Optionally, the infrared light supply 30 can be set in the lower section of the glass cover-plate of electronic equipment, and with the liquid crystal The liquid crystal display panel of display screen is arranged side by side.
For example, the glass cover-plate of electronic equipment 2 is arranged in the infrared light supply 30 in a kind of possible embodiment 130 lower section is arranged side by side with the liquid crystal display panel 110 of liquid crystal display 10, and is set to the backlight module of liquid crystal display 10 120 oblique upper.Specifically, the backlight module 120 includes prism film 121 and backlight module other structures 124.
For example, the glass cover-plate of electronic equipment 2 is arranged in the infrared light supply 30 in alternatively possible embodiment Liquid crystal display panel 110 and backlight module 120 in 130 lower section, with liquid crystal display 10 are arranged side by side.
Optionally, the infrared light supply 30 can be with bias laid in the lower section of the glass cover-plate.For example, the infrared light supply 30 It can be by optical cement bias laid in the lower section of the display screen 10.Optionally, the optical cement can be any optics liquid Glue or optics solid-state glue.
Optionally, between the infrared light supply 30 and the glass cover-plate and/or the infrared light supply 30 and the liquid crystal Infrared light layer can be set between display screen 10, the infrared light layer is used to penetrate the infrared excitation light and blocking Visible light.Optionally, the infrared light layer can be saturating infrared printing ink.
Optionally, resistance can be set between the liquid crystal display panel 110 in the infrared light supply 30 and the liquid crystal display 10 Blobs cotton, for stopping visible light.
Optionally, the non-display area at 2 edge of electronic equipment is arranged in the infrared light supply 30.For example, electronics is set Standby 2 be mobile phone, and non-display area is the mobile phone frame region of the non-display image in mobile phone surface, specifically, the infrared light supply 30 It is arranged in the corresponding lower zone of mobile phone frame region of non-display image.
It should be understood that the specific example in the embodiment of the present application is intended merely to that those skilled in the art is helped to more fully understand The embodiment of the present application, rather than limit the range of the embodiment of the present application.
It should be understood that the term used in the embodiment of the present application and the appended claims is only merely for the specific reality of description The purpose for applying example, is not intended to be limiting the embodiment of the present application.For example, being made in the embodiment of the present application and the appended claims The "an" of singular, " above-mentioned " and "the" are also intended to including most forms, unless context clearly shows that other Meaning.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure Member can be realized with electronic hardware, computer software, or a combination of the two, can in order to clearly demonstrate hardware and software Interchangeability generally describes each exemplary composition and step according to function in the above description.These functions are actually It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed Scope of the present application.
In several embodiments provided herein, it should be understood that disclosed system, device can pass through it Its mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the unit, only Only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be tied Another system is closed or is desirably integrated into, or some features can be ignored or not executed.In addition, shown or discussed phase Mutually between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication of device or unit Connection is also possible to electricity, mechanical or other form connections.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple In network unit.Some or all of unit therein can be selected to realize the embodiment of the present application scheme according to the actual needs Purpose.
It, can also be in addition, each functional unit in each embodiment of the application can integrate in one processing unit It is that each unit physically exists alone, is also possible to two or more units and is integrated in one unit.It is above-mentioned integrated Unit both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product When, it can store in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words It embodies, which is stored in a storage medium, including some instructions are used so that a computer Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the application Portion or part steps.And storage medium above-mentioned include: USB flash disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic or disk etc. are various can store program The medium of code.
The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any Those familiar with the art within the technical scope of the present application, can readily occur in various equivalent modifications or replace It changes, these modifications or substitutions should all cover within the scope of protection of this application.Therefore, the protection scope of the application should be with right It is required that protection scope subject to.

Claims (27)

1. fingerprint identification device under a kind of screen, fingerprint is examined under being shielded for being arranged in below the backlight module of liquid crystal display It surveys, the backlight module includes prism film, which is characterized in that fingerprint identification device includes: optical module and light inspection under the screen Survey array；
The optical module is set to the obliquely downward of fingerprint detection zone in the liquid crystal display；
Wherein, the optical module is for receiving fingerprint detection signal by the one of prism film side refraction of the prism film The particular fingerprint detection signal formed later, and particular fingerprint detection signal is transmitted to the light detection array；
The particular fingerprint is detected signal processing and is by the light detection array for receiving the particular fingerprint detection signal Fingerprint image signal；
Wherein, the fingerprint detection signal is the light letter of finger reflection or scattering and return through the fingerprint detection overlying regions Number, for detecting the finger print information of the finger.
2. fingerprint identification device under screen according to claim 1, which is characterized in that the fingerprint detection region is located at described The side of the optical axis of optical module.
3. fingerprint identification device under screen according to claim 1 or 2, which is characterized in that the fingerprint detection region and institute State optical module the light detection array projection no overlap in the plane.
4. fingerprint identification device under screen according to any one of claim 1-3, which is characterized in that the fingerprint detection area Domain is located at the field of view edge region of the optical module.
5. fingerprint identification device under screen described in any one of -4 according to claim 1, which is characterized in that the light detection array Be set on the optical axis of the optical module or in the optical module optical axis side.
6. fingerprint identification device under screen according to any one of claims 1-5, which is characterized in that the optical module The part of the side of optical axis is set to the optical module for receiving the particular fingerprint detection signal, the light detection array Optical axis the other side.
7. fingerprint identification device under screen according to claim 1 to 6, which is characterized in that fingerprint is known under the screen Other device further include:
Reflection unit is set to below the optical module, for the particular fingerprint to be detected signal reflex to the optics Component.
8. fingerprint identification device under screen according to claim 7, which is characterized in that the light detection array is set to described Above optical module.
9. fingerprint identification device under screen according to claim 7 or 8, which is characterized in that the reflection unit and the back Optical mode group is parallel.
10. fingerprint identification device under screen according to claim 7 or 8, which is characterized in that plane where the reflection unit It is in angle with plane where the backlight module.
11. fingerprint identification device under screen according to claim 1 to 10, which is characterized in that the optical module Position make the optical module do not receive by the prism film another prism film side refraction after optical signal.
12. fingerprint identification device under screen described in any one of -11 according to claim 1, which is characterized in that the light detection battle array The position of column makes the light detection array received less than the light after another prism film side refraction in the prism film Signal.
13. fingerprint identification device under screen described in any one of -12 according to claim 1, which is characterized in that the optical module For extrawide angle lens group.
14. fingerprint identification device under screen according to claim 13, which is characterized in that the extrawide angle lens group includes one A or multiple lens, the surface of one or more of lens are spherical surface or aspherical.
15. fingerprint identification device under screen described in any one of -14 according to claim 1, which is characterized in that the fingerprint detection Region is more than or equal to 5cm*5cm.
16. fingerprint identification device under screen described in any one of -15 according to claim 1, which is characterized in that fingerprint under the screen Identification device further include:
Wave filtering layer is set in the optical path between the backlight module and the light detection array, for filtering non-targeted wave band Optical signal, through the optical signal of target wave band.
17. fingerprint identification device under screen described in any one of -16 according to claim 1, which is characterized in that fingerprint under the screen Identification device further include:
Fixation kit, for the optical module and the light detection array to be fixed below the backlight module.
18. fingerprint identification device under screen described in any one of -17 according to claim 1, which is characterized in that further include:
Infrared light supply, for providing infrared excitation light, the infrared excitation for the fingerprint detection of fingerprint identification device under the screen Illumination is mapped at least partly display area of the liquid crystal display, described in at least partly display area at least partly covers Shield the fingerprint detection region of lower fingerprint identification device；
Wherein, particular fingerprint detection signal include the infrared light supply infrared excitation light after finger reflects by institute State the particular fingerprint detection infrared signal of backlight module.
19. fingerprint identification device under screen according to claim 18, which is characterized in that the infrared light supply is set to described The field of view edge region of optical module.
20. fingerprint identification device under screen described in 8 or 19 according to claim 1, which is characterized in that the infrared light supply is single Or more infrared light-emitting diodes；
Described single or more infrared light-emitting diodes are distributed in the surrounding in the fingerprint detection region.
21. a kind of electronic equipment characterized by comprising liquid crystal display and,
According to claim 1 to fingerprint identification device under screen described in any one of 17, wherein the liquid crystal display includes back Optical mode group, fingerprint identification device is set to below the backlight module under the screen.
22. electronic equipment according to claim 21, which is characterized in that the electronic equipment further include:
Infrared light supply, for providing infrared excitation light, the infrared excitation for the fingerprint detection of fingerprint identification device under the screen Illumination is mapped at least partly display area of the liquid crystal display, described in at least partly display area at least partly covers Shield the fingerprint detection region of lower fingerprint identification device；
Wherein, particular fingerprint detection signal include the infrared light supply infrared excitation light after finger reflects by institute State the particular fingerprint detection infrared signal of backlight module.
23. electronic equipment according to claim 22, which is characterized in that the infrared light supply is set to the optical module Field of view edge region.
24. the electronic equipment according to claim 22 or 23, which is characterized in that the infrared light supply is single or more Infrared light-emitting diode；
Described single or more infrared light-emitting diodes are distributed in the surrounding in the fingerprint detection region.
25. the electronic equipment according to any one of claim 22-24, which is characterized in that the infrared light supply setting exists The lower section of the glass cover-plate of the liquid crystal display, and be arranged side by side with the liquid crystal display panel of the liquid crystal display.
26. electronic equipment according to claim 25, which is characterized in that the infrared light supply bias laid is in the glass cover-plate Lower section.
27. the electronic equipment according to claim 25 or 26, which is characterized in that fingerprint identification device also wraps under the screen Include: infrared light layer is set between the infrared light supply and the glass cover-plate and/or the infrared light supply and the liquid Between crystal display screen, for through the infrared excitation light and blocking visible light.
CN201980000677.6A 2019-04-30 2019-04-30 Under-screen fingerprint identification device and electronic equipment Active CN110235143B (en)

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