CN109496313A - Fingerprint identification device and electronic equipment - Google Patents
Fingerprint identification device and electronic equipment Download PDFInfo
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- CN109496313A CN109496313A CN201880002083.4A CN201880002083A CN109496313A CN 109496313 A CN109496313 A CN 109496313A CN 201880002083 A CN201880002083 A CN 201880002083A CN 109496313 A CN109496313 A CN 109496313A
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- optical
- fingerprint
- identification device
- fingerprint identification
- display screen
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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
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- Optics & Photonics (AREA)
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- Theoretical Computer Science (AREA)
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The embodiment of the present application discloses a kind of fingerprint identification device and electronic equipment.The fingerprint identification device is applied in the electronic equipment with display screen, the fingerprint identification device includes: optical fingerprint sensor, it is arranged in below display screen so that its fingerprint collecting region is at least partially disposed within the display area of the display screen, the optical fingerprint sensor includes at least two effective sensitization areas, and at least two effective sensitization area is for detecting the optical signal from the fingerprint collecting overlying regions；At least two optical lenses are arranged between the display screen and the optical fingerprint sensor, and the multiple optical lens corresponds respectively to the multiple effective sensitization area, wherein each optical lens is for guiding optical signal to its corresponding effective sensitization area.The fingerprint identification device can collect more finger print informations in the case where not increasing the thickness of fingerprint identification device, to improve the accuracy of fingerprint recognition.
Description
Technical field
The invention relates to fingerprint identification technology fields, and more particularly, to a kind of fingerprint identification device and
Electronic equipment.
Background technique
With the high speed development of mobile phone industry, fingerprint identification technology is increasingly paid attention to by people, shields lower fingerprint recognition skill
The functionization of art has become needed for masses.Fingerprint identification technology is to acquire light source by optical fingerprint sensor to issue under optical panel
The reflected light that is reflected to form in finger of light, the finger print information of finger is carried in reflected light, to realize the lower fingerprint of screen
Identification.Fingerprint identification device generally includes optical path modulation device, and reflected light need to reach optics after the modulation of optical path modulation device and refer to
Line sensor needs to expand as far as possible the visual field of optical path modulation device to obtain more finger print informations to acquire more large area
Fingerprint image, at this time can be by increasing the object distance between optical path modulation device and display screen to realize, but thus will increase
The thickness of fingerprint identification device.Therefore, how more fingers are collected in the case where not increasing the thickness of fingerprint identification device
How print image reduces the thickness of fingerprint identification device in other words under conditions of collecting the fingerprint image of same size, at
For urgent problem.
Summary of the invention
The embodiment of the present application provides a kind of fingerprint identification device and electronic equipment, can collect more finger print informations
And do not increase the thickness of fingerprint identification device.
In a first aspect, providing a kind of fingerprint identification device, apply in the electronic equipment with display screen, the fingerprint is known
Other device includes:
Optical fingerprint sensor, for be arranged below display screen so that its fingerprint collecting region be at least partially disposed at it is described
Within the display area of display screen, the optical fingerprint sensor includes at least two effective sensitization areas, wherein each effective
Photosensitive region is for detecting the received reflected light signal from the fingerprint collecting overlying regions；
At least two optical lenses, for be arranged between the display screen and the optical fingerprint sensor, it is described extremely
Few two optical lenses correspond respectively at least two effective sensitization area, wherein each optical lens is used for optical signal
It guides to its corresponding effective sensitization area.
In one possible implementation, the optical fingerprint sensor includes an optical fingerprint sensor chip,
At least two effective sensitization area is located at the optical fingerprint sensor chip.
In one possible implementation, the optical fingerprint sensor includes multiple optical fingerprint sensor chips,
At least two effective sensitization area is located at different optical fingerprint sensor chips.
In one possible implementation, the optical fingerprint sensor includes multiple optical fingerprint sensor chips,
Part effective sensitization area at least two effective sensitization area is located at different optical fingerprint sensor chips.
In one possible implementation, each optical lens is for will be from one in the fingerprint collecting region
The optical signal of subregion is guided to its corresponding effective sensitization area, wherein part between the corresponding subregion of different optical lenses
Overlapping.
In one possible implementation, each optical lens is for will be from one in the fingerprint collecting region
The optical signal of subregion is guided to its corresponding effective sensitization area, wherein between the corresponding subregion of different optical lenses mutually not
Overlapping.
In one possible implementation, at least two optical lenses straight line arrangement.
In one possible implementation, at least two optical lens include three optical lenses, described three
Optical lens is arranged into triangle.
In one possible implementation, the fingerprint identification device further includes filter unit, and the filter unit is set
It sets between the display screen and the optical fingerprint sensor, the filter unit is used to make the optical signal transmission of specific wavelength
To the optical fingerprint sensor.
Second aspect provides a kind of electronic equipment, comprising: display screen and any of first aspect or first aspect can
Fingerprint identification device in the implementation of energy.
In one possible implementation, the display screen is liquid crystal display LCD.
In one possible implementation, the display screen is organic light-emitting diode (OLED) display screen OLED, the display
The luminescent layer of screen includes multiple organic light-emitting diode light sources, wherein the fingerprint identification device is using at least partly organic light emission
Excitation light source of the diode light-source as fingerprint recognition.
Based on the above-mentioned technical proposal, fingerprint identification device includes at least two optical lenses, at least two optical lens
At least two effective sensitization areas of optical fingerprint sensor are corresponded respectively to, wherein each optical lens is for reflecting finger
Optical signal guide to its corresponding effective sensitization area, due to two or more optical lenses can will on finger it is more
The optical signal that fingerprint image is reflected is guided to corresponding effective sensitization area, therefore the fingerprint identification device can collect more
More finger print informations to improve the accuracy of fingerprint recognition, and not will increase the thickness of fingerprint identification device.
Detailed description of the invention
Fig. 1 is the floor map for the electronic equipment that the application can be applicable in.
Fig. 2 is partial cutaway schematic view of the electronic equipment shown in FIG. 1 along A-A '.
Fig. 3 is the floor map for another electronic equipment that the application can be applicable in.
Fig. 4 is partial cutaway schematic view of another electronic equipment shown in FIG. 1 along A-A '.
Fig. 5 is the schematic diagram of the only fingerprint identification device including an optical lens.
Fig. 6 is the schematic block diagram of the fingerprint identification device of the embodiment of the present application.
Fig. 7 is a kind of schematic diagram of possible fingerprint identification device of the embodiment of the present application.
Fig. 8 is the schematic diagram of the alternatively possible fingerprint identification device of the embodiment of the present application
Fig. 9 is the schematic diagram of the positional relationship between the corresponding subregion of different optical lenses of the embodiment of the present application.
Figure 10 is the schematic diagram of the positional relationship between the corresponding subregion of different optical lenses of the embodiment of the present application.
Figure 11 is the schematic diagram of the positional relationship between the corresponding subregion of different optical lenses of the embodiment of the present application.
Figure 12 is the signal of effective sensitization area corresponding to multiple optical lenses of the straight line arrangement of the embodiment of the present application
Figure.
Figure 13 is effective sensitization area corresponding to three optical lenses of the triangular pitch of the embodiment of the present application.
Specific embodiment
Below in conjunction with attached drawing, technical solutions in the embodiments of the present application is described.
As electronic equipment 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, which refers to, is mounted on fingerprint identification device (such as optical fingerprint identification device) below display screen, is showing to realize
Fingerprint recognition operation is carried out in the display area of screen, does not need the region setting fingerprint in electronic equipment front in addition to display area
Pickup area.
Under optical panel fingerprint identification technology carried out using the light returned from the top surface of equipment display component fingerprint induction and
Other inductive operations.The light of the return carries the information of the object (such as finger) contacted with the top surface, by acquiring and detecting
The light of the return realizes the particular optical sensor module being located at below display screen.The design of optical sensor module can be
Desired optical imagery is realized by being properly configured to acquire and detect the optical element of the light returned.
It should be understood that the technical solution of the embodiment of the present application can be applied to various electronic equipments, such as smart phone, notes
The portable or mobiles such as this computer, tablet computer, game station calculate equipment and electronic databank, automobile, bank's automatic cabinet
Other electronic equipments such as member's machine (Automated Teller Machine, ATM), but the embodiment of the present application does not limit this.
Figures 1 and 2 show that a kind of electronic equipment 100 that the fingerprint identification device of the embodiment of the present application can be applicable in is shown
It is intended to, wherein Fig. 1 is the front schematic view of electronic equipment 100, and Fig. 2 is that electronic equipment 100 shown in FIG. 1 is cutd open along the part of A-A '
Face structural schematic diagram.
As shown in Figure 1 and shown in Fig. 2, which includes display screen 120 and optical fingerprint identification device (back
Referred to as fingerprint identification device) 130, wherein the optical fingerprint identification device 130 has one or more induction arrays,
The induction arrays are arranged at the regional area of 120 lower section of display screen, so that optical finger print identification dress
The fingerprint collecting region (or induction region) 103 for setting 130 is at least partially disposed at the display area 102 of the display screen 120.
It should be appreciated that the area in the fingerprint collecting region 103 can be with the induction of the optical fingerprint identification device 130
The area of array is different, such as example, by the light path design, reflective folding light path design or other light of lens imaging
The light path designs such as convergence or reflection, can make the area in the fingerprint collecting region 103 of the optical fingerprint identification device 130
Greater than the area of 130 induction arrays of optical fingerprint identification device.In other substitution implementations, if using such as light
Line collimating fashion carry out optical path guidance, the fingerprint collecting region 103 of the optical fingerprint identification device 130 can also be designed to
The area of the induction arrays of the optical fingerprint identification device 130 is consistent.
As shown in Figure 1, the fingerprint collecting region 103 is located among the display area 102 of the display screen 120, therefore,
User is when needing to be unlocked the electronic equipment or other fingerprint authentications, it is only necessary to press finger in place
In the fingerprint collecting region 103 of the display screen 120, it can realize that fingerprint inputs.Since fingerprint detection can be in screen in fact
It is existing, therefore fingerprint key (such as Home is arranged without the special reserved space in its front for electronic equipment 100 using the above structure
Key), so as to which using screen scheme comprehensively, i.e., the display area 102 of the described display screen 120 can extend substantially to entire electronics
The front of equipment 100.
In as one embodiment, the display screen 120 can be self light emitting display panel, use spontaneous light display unit
As display pixel, for example, Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) display screen or
Micro-led (Micro-LED) display screen.For using OLED display screen, the optical fingerprint identification device 130
It can use OLED display unit (i.e. OLED light source) work that the OLED display screen 120 is located at the fingerprint identification region 103
For the excitation light source of optical finger print detection.
In other embodiments, the optical fingerprint identification device 130 can also use built-in light source or external light source
To provide the optical signal for carrying out fingerprint detection.In this case, the optical fingerprint identification device 130 can be adapted for
Non-spontaneous smooth display screen, such as liquid crystal display or other passive light emitting displays.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, the optics of the electronic equipment 100
System of fingerprints can also include for optical finger print detection excitation light source, the excitation light source can be specially infrared light supply or
The light source of person's specific wavelength non-visible light can be set below the backlight module of the liquid crystal display or be arranged in institute
The fringe region below the cover sheet of electronic equipment 100 is stated, and liquid crystal surface can be set in the optical fingerprint identification device 130
It is guided below the fringe region of plate or cover sheet and by optical path so that fingerprint detection light can reach the optics refers to
Line identification device 130；Alternatively, the optical fingerprint identification device 130 also can be set below the backlight module, and described
Backlight module is by carrying out aperture or other optical designs to film layers such as diffusion sheet, blast piece, reflector plates to allow fingerprint to examine
Light is surveyed to pass through liquid crystal display panel and backlight module and reach the optical fingerprint identification device 130.
Also, the induction arrays of the optical fingerprint identification device 130 are specially optical detector (Photo detector)
Array comprising multiple optical detectors in array distribution, the optical detector can be used as optical sensor as described above
Unit.When finger touch, press or close to (for ease of description, the application is referred to as touching) in the fingerprint identification region
When 103, the light that the display unit of the fingerprint identification region 103 issues occurs to reflect and formed anti-in the fingerprint of finger surface
Light is penetrated, wherein the reflected light of the wrinkle ridge of the finger print and line paddy is different, reflected light is from the display screen 120 and by institute
It states photodetector array and is received and converted to corresponding electric signal, i.e. fingerprint detection signal.Based on the fingerprint detection signal
Fingerprint image data can be obtained, and can be verified with further progress fingerprint matching, thus real in the electronic equipment 100
Existing optical finger print identification function.
It should be understood that the electronic equipment 100 further includes transparency protected cover board 110, the lid in specific implementation
Plate 110 can be specially transparent cover plate, such as glass cover-plate or sapphire cover board, be located at the top of the display screen 120
And cover the front of the electronic equipment 100.Therefore, in the embodiment of the present application, so-called finger is touched, presses or is approached
The display screen 120 actually refer to finger touch, pressing or close to above the display screen 120 cover board 110 or
Cover the protective layer of the cover board 110.In addition, the electronic equipment 100 can also include touch sensor, the touch
Sensor can be specially touch panel, can be set on 120 surface of display screen, can also partially or wholly integrate
To inside the display screen 120, i.e., the described display screen 120 is specially touching display screen.
As a kind of optional implementation, as shown in Fig. 2, the optical fingerprint identification device 130 includes optical detection
Unit 134 and optical module 132, the optical detection unit 134 are electric including the induction arrays and with the induction arrays
Property connection reading circuit and other auxiliary circuits, a chip (Die) can be produced on by semiconductor technology；That is institute
Optical imagery chip or image sensor chip can be produced on by stating optical detection unit 134.The optical module 132 can be set
It sets in the top of the induction arrays of the optical detection unit 134, optical filter or optical filter can be specifically included
(Filter), optical path guide structure and other optical elements, the optical filter can be used for filtering out the environment light for penetrating finger,
And the optical path guide structure is mainly used for the light propagated downwards being collimated, modulated or being converged etc. optical paths guidance with reality
The induction arrays now, which are directed to, from the reflected reflected light of finger surface carries out optical detection.
In specific implementation, the optical module 132 can be encapsulated in the same optics with the optical detection unit 134
The chip exterior where the optical detection unit 134 can also be arranged in the optical module 132 by fingerprint chip, such as
The optical module 132 is fitted in above the chip, or the subelement of the optical module 132 is integrated in above-mentioned
Among chip.Wherein, there are many implementations for the optical path guide structure of the optical module 132, for example can be specially half
The optical path modulation device or beam path alignment device that conductor silicon wafer or other substrates are made, with multiple light path modulation units
Perhaps the collimation unit light path modulation unit or collimation unit can be specially microwell array.Alternatively, the optical waveguide layer
It can be optical lens (Lens) layer, there is one or more lens units, such as one or more non-spherical lens compositions
Lens group.From the reflected reflected light of finger through the microwell array or the lens unit carry out beam path alignment or
It after convergence, and is received by optical sensor unit below, accordingly, the induction arrays can detecte out the fingerprint image of finger
Picture.
The lower section of the optical fingerprint identification device 130 is also provided with circuit board 140, such as flexible circuit board
(Flexible Printed Circuit, FPC), the optical fingerprint identification device 130 can for example be arrived by pad solder
The circuit board 140, and realized and other of other peripheral circuits or the electronic equipment 100 by the circuit board 140
The electrical interconnection and signal transmission of element.For example, the optical fingerprint identification device 130 can be connect by the circuit board 140
The control signal of the processing unit of the electronic equipment 100 is received, and can also be examined the fingerprint by the circuit board 140
Signal is surveyed to export to the processing unit of the electronic equipment 100 or control unit etc..
Fig. 1 and optical fingerprint identification device shown in Fig. 2 130 are single sensor chip, the finger of the embodiment of the present application
Line identification device can be applied under the scene of single-sensor chip as shown in Figures 1 and 2, i.e., can also apply and such as scheme
3 and multisensor shown in Fig. 4 splicing scene under.
Another electronic equipment 200 that the fingerprint identification device that Fig. 3 and Fig. 4 shows the embodiment of the present application can be applicable in
Schematic diagram, wherein Fig. 3 is the front schematic view of electronic equipment 200, and Fig. 4 is electronic equipment 200 shown in Fig. 3 along the part of A-A '
The schematic diagram of the section structure.
As shown in Figure 3 and Figure 4, electronic equipment 200 may include display screen 220 and optical fingerprint identification device 240,
In, the display screen 220 has display area 202, and the display screen 220 is arranged in the optical fingerprint identification device 240
Lower section.
As one embodiment, the optical fingerprint identification device 240 can specifically include one or more with light
Learn the optical fingerprint sensor 242 (being also referred to as sensor chip below) of induction arrays；The multiple optical fingerprint sensor 242
The lower section of the display screen 220 can be disposed side by side on.Wherein, each optical sensor array respectively includes multiple optical sensors
Unit, and the region of the optical sensor array or its optical sensor region correspond to the optical finger print sensing where it
The induction region 203 of device 242, the induction region of the multiple optical fingerprint sensor collectively form the optical finger print identification dress
Set 240 fingerprint collecting region 230.In other words, the fingerprint collecting region 230 of the optical fingerprint identification device 240 can be with
Including multiple subregions, each subregion corresponds respectively to the induction of one of optical fingerprint sensor or optical sensor array
Region.As shown in figure 3, the fingerprint collecting region 230 is located among the display area 202 of the display screen 220, due to using
Multiple optical fingerprint sensors mode arranged side by side, the fingerprint collecting region 230 of the fingerprint identification device 240 can extend
To the main region of the lower half portion of the display area 202, that is, the usual pressing area of finger is expanded to, to realize blind by formula
Fingerprint input operation.In other alternate embodiments, when the optical fingerprint sensor quantity is enough, the fingerprint collecting area
Domain 230 can be extended to half of display area even entire display area, to realize half screen or full frame fingerprint detection.
In a particular embodiment, multiple optical fingerprint sensors 242 of the optical fingerprint identification device 240 can be distinguished
It is the sensor chip of individual packages, is also possible to be encapsulated in the same chip packing-body after being made as multiple chips (Die)
Within, it can also be the different zones that the same chip is produced on by semiconductor technology.As a kind of optional implementation,
As shown in figure 4, being also provided with optical path modulation device 244 above the optical fingerprint sensor 242.With the optical path modulation device
For 244, independent optical member adhering can be used as above the induction arrays of the optical fingerprint sensor 242,
The chip interior of the optical fingerprint sensor 242 can be integrated in by semiconductor technology, to realize that ultra-thin fingerprint is known
Other device 240.Specifically, the optical path modulation device 244 can be the optical collimator using the through-hole array with high-aspect-ratio,
It is mainly used for that the fingerprint detection light propagated downwards is collimated, modulated and is imaged, realization will be reflected from finger surface
Reflected light be directed to the induction arrays and carry out optical detection to obtain information in fingerprint.
Optionally, corresponding with multiple optical fingerprint sensors 242 of the optical fingerprint identification device 240, the light
Road modulator 244 can have multiple, each optical path modulation device 244 respectively corresponds an optical fingerprint sensor, and pastes respectively
Close the top that its corresponding optical fingerprint sensor 242 is set.Alternatively, the multiple optical fingerprint sensor 242 can also be with
The optical path modulation device 244 of a shared entirety, i.e., it is described to cover that the described optical path modulation device 244 has a sufficiently large area
The induction arrays of multiple optical fingerprint sensors 242.In addition, in the optical path modulation device 244 and the optical fingerprint sensor
Between 242 or between the display screen 220 and the optical path modulation device 244, other optical elements are also provided with, such as
Optical filter (Filter) or other optical diaphragms are mainly used for isolating the influence that external interference light detects optical finger print.
Wherein, the optical filter, which can be used for filtering out, penetrates the went forward side by side display screen 220 of finger and enters described image identification sensor
230 environment light, similar with the optical path modulation device 244, the optical filter can divide in each optical fingerprint sensor 242
Interference light She Zhi not carried out to filter out, or the multiple optical finger print can also be covered simultaneously using a large area optical filter and passed
Sensor 242.
Alternatively, the optical path modulation device 244 can also replace above-mentioned optical collimator using optical lens (Lens),
Aperture, which can be formed, by light screening material above the optical lens cooperates the optical lens to converge to down fingerprint detection light
The optical fingerprint sensor 242 of side is to realize fingerprint imaging.Analogously, each optical fingerprint sensor 242 can be distinguished
It configures an optical lens and carries out fingerprint imaging, alternatively, the multiple optical fingerprint sensor 242 also can use the same light
Camera lens is learned to realize light convergence and fingerprint imaging.In other alternate embodiments, each optical fingerprint sensor 242 is even
Induction arrays (Dual Array) or multiple induction arrays (Multi-Array) there are two can also having, and two are configured simultaneously
A or multiple optical lens cooperate described two or multiple induction arrays to carry out optical imagery, to reduce image-forming range and enhance
Imaging effect.
On the other hand, the lower section of the optical fingerprint identification device 240 is also provided with circuit board 250, such as soft
Multiple optical finger prints of circuit board (Flexible Printed Circuit, FPC), the optical fingerprint identification device 240 pass
Sensor 242 can be by pad solder to the circuit board 250, and is realized and other peripheral circuits by the circuit board 250
Or the electrical interconnection and signal transmission of the other elements of the electronic equipment 200.
In the fingerprint identification device of some implementations, fingerprint identification device only includes an optical lens.Such as Fig. 5
Shown, which can guide to optical finger print by the optical signal in its visual field (Field of View, FOV) range and pass
The effective sensitization area of sensor.The area in the fingerprint collecting region of display screen is S, which is arranged in display screen and optics
Between fingerprint sensor, object distance of the optical lens apart from display screen is P, picture of the optical lens apart from optical fingerprint sensor
Away from for Q, wherein visual field area of the instrumentality away from the adjustable optical lens of P, the image distance Q of adjusting is adjustable to be referred in optics
The clarity being imaged on the effective sensitization area of line sensor.It is additionally provided with filter unit above optical fingerprint sensor, uses
In the stray light for filtering out interference to select required optical wavelength.The light that display screen issues is incident to the fingerprint of display screen
Finger above pickup area, the light after handling digital reflex is acquired by optical lens, and is transmitted to optics by filter unit
The effective sensitization area of fingerprint sensor, or be effective coverage (Active Array, AA), photosensitive region etc., to complete
The detection of fingerprint image.
In order to obtain more finger print informations, need the visual field for expanding the optical lens as far as possible greater area of to acquire
Fingerprint image, at this time can be by increasing the object distance P between optical lens and display screen come real so as to improve fingerprint matching performance
It is existing, but result in the thickness of entire fingerprint identification device larger in this way, the thickness of fingerprint identification device directly affects its application
The thickness of electronic equipment.And if be not adjusted to object distance P, the visual field of the optical lens can be limited because of object distance P
System.
In consideration of it, the embodiment of the present application proposes fingerprint identification technology under a kind of screen, fingerprint identification device can be made to collect
More finger print informations and the thickness for not increasing fingerprint identification device.The application is described in detail below with reference to Fig. 6 to Figure 13 to implement
The fingerprint identification device of example.
Fig. 6 shows the schematic diagram of the fingerprint identification device 600 of the application one embodiment.
As shown in fig. 6, fingerprint identification device 600 can be applied in the electronic equipment with display screen, fingerprint recognition dress
Setting 600 includes optical fingerprint sensor 610 and at least two optical lenses 620.Wherein:
Optical fingerprint sensor 610, for being arranged below display screen so that its fingerprint collecting region is at least partially disposed at
Within the display area of the display screen, the optical fingerprint sensor 610 includes at least two effective sensitization areas, wherein often
A effective sensitization area is respectively correspondingly provided with optical sensor array, received from the fingerprint collecting for detecting
The reflected light signal of overlying regions.
At least two optical lenses 620, for being arranged between the display screen and the optical fingerprint sensor 610,
At least two optical lens corresponds respectively at least two effective sensitization area, wherein each optical lens is used to incite somebody to action
Optical signal is guided to its corresponding effective sensitization area.
Since fingerprint identification device includes at least two optical lenses, which corresponds respectively to optics
At least two effective sensitization areas of fingerprint sensor, wherein each optical lens be used for by the optical signal that finger reflects guide to
Its corresponding effective sensitization area, in this way, what two or more optical lenses can be reflected the fingerprint image on finger
Optical signal is guided to corresponding effective sensitization area, therefore the fingerprint identification device can be in the thickness for not increasing fingerprint identification device
More finger print informations are collected in the case where degree, to improve the accuracy of fingerprint recognition, or can collect it is identical
The thickness of fingerprint identification device is reduced under conditions of finger print information.
For example, Fig. 7 is a kind of schematic diagram of possible fingerprint identification device of the embodiment of the present application, with two in Fig. 7
For a optical lens (optical lens 1 and optical lens 2), but the fingerprint identification device of the embodiment of the present application also may include more
More optical lenses.Optical fingerprint sensor includes two effective sensitization areas, and optical lens 1 and the setting of optical lens 2 are aobvious
Between display screen and optical fingerprint sensor, wherein the object distance of optical lens 1 and optical lens 2 apart from display screen is approximately P, optics
The image distance of lens 1 and optical lens 2 apart from optical fingerprint sensor is approximately Q.The light that display screen issues is incident to display screen
Fingerprint collecting overlying regions finger, through finger different location fingerprint pattern reflection after light respectively by optical lens 1
It is acquired with optical lens 2, and corresponding effective sensitization area is separately directed to by optical lens 1 and optical lens 2, thus
Complete the detection of fingerprint image.
As can be seen that the thickness of the fingerprint identification device in Fig. 7 is identical as the thickness of the fingerprint identification device in Fig. 5, but
The fingerprint collecting region of fingerprint identification device in Fig. 7 is significantly greater than the fingerprint shown in fig. 5 only including an optical lens and knows
The fingerprint collecting region of other device.In the optical lens using same model and use the light path design of identical parameters for example identical
P and Q when, the area in the fingerprint collecting region of Fig. 7 can be 2 times of the area in fingerprint collecting region shown in fig. 5, so as to
It is enough that more finger print informations are obtained in the case where not increasing fingerprint identification device thickness.
In another example the schematic diagram of the alternatively possible fingerprint identification device of the embodiment of the present application shown in Fig. 8, in Fig. 8 still
By taking two optical lenses (optical lens 1 and optical lens 2) as an example, wherein optical lens 1 and optical lens 2 are apart from display screen
Object distance is P ', and wherein P ' is less than P, and the image distance of optical lens 1 and optical lens 2 apart from optical fingerprint sensor is Q.Optical finger print
Sensor includes two effective sensitization areas, and the light that display screen issues is incident to the hand of the fingerprint collecting overlying regions of display screen
Refer to, the light after the reflection of the fingerprint pattern of finger different location is acquired by optical lens 1 and optical lens 2 respectively, and by light
It learns lens 1 and optical lens 2 is separately directed to corresponding effective sensitization area, to complete the detection of fingerprint image.
Compared to fingerprint identification device shown in fig. 5, the distance due to optical lens apart from display screen is reduced to P ' by P,
Therefore the corresponding effective sensitization area of each optical lens the area in fingerprint collecting region that can be detected just become smaller, still
Optical lens 1 and the corresponding effective sensitization area of optical lens 2 the area that can be detected for generally referring to line pickup area can be with
It is identical as the area in fingerprint collecting region shown in fig. 5, it can even be greater than fingerprint collecting area shown in fig. 5 in some cases
The area in domain.Compared to fingerprint identification device shown in fig. 5, fingerprint collecting region area there is no when variation, fingerprint
The thickness of identification device has apparent reduction, so as to be further reduced electronic equipment applied by the fingerprint identification device
Thickness.
In the embodiment of the present application, optical fingerprint sensor may include one or more optical fingerprint sensor chips.
For example, optical fingerprint sensor includes an optical fingerprint sensor chip, at least two effective sensitization area
It is respectively positioned on the optical fingerprint sensor chip.
In another example optical fingerprint sensor includes multiple optical fingerprint sensor chips, at least two effective photosensitive area
Domain is located at different optical fingerprint sensor chips.
In another example optical fingerprint sensor includes multiple optical fingerprint sensor chips, at least two effective photosensitive area
Part effective sensitization area in domain is located at different optical fingerprint sensor chips.For example, fingerprint identification device includes 4 light
Lens are learned, which includes two optical fingerprint sensor chips, wherein each optical fingerprint sensor chip
Upper there are two effective sensitization areas, therefore the optical fingerprint sensor includes four effective sensitization areas, and each effective feeling
Light region corresponds to an optical lens.
It should be understood that each effective sensitization area of optical fingerprint sensor may include having multiple optical sensor units
The optical sensor array of (or being photosensitive pixel), the region of the optical sensor array correspond to the optical finger print where it
The induction region of sensor, multiple induction regions collectively form the fingerprint collecting region of fingerprint identification device.
Optionally, optical lens can corresponding optical fingerprint sensor chip be packaged together；Alternatively, optical lens
Mirror can be used as the inside that the component relatively independent with optical fingerprint sensor is mounted on fingerprint identification device.
Each optical lens in fingerprint identification device is used for will be from a son in the fingerprint collecting region of display screen
The optical signal in region is guided to its corresponding effective sensitization area, that is to say, that at least two optical lens is guided to respective
The information in fingerprint of different subregions is carried in the optical signal of corresponding effective sensitization area.Optionally, different optical lenses
It can not overlap, can also partly overlap between corresponding subregion.
In the corresponding subregion of different optical lenses, the positional relationship between any two subregion may exist following three
Kind situation, illustrates below with reference to Fig. 9 to Figure 11.Wherein, in Fig. 9 into Figure 11, border circular areas indicates the view of optical lens
, square region indicates the corresponding subregion of optical lens, i.e. actual detection region, the fingerprint image in the actual detection region
It can be detected by the corresponding effective sensitization area of the optical lens.
Situation 1
It is not overlapped between subregion.
Such as shown in Fig. 9, by taking two optical lenses (optical lens 1 and optical lens 2) as an example, the correspondence of optical lens 1 refers to
Subregion 1 in line pickup area can guide the optical signal that the fingerprint pattern of 1 top of subregion is reflected corresponding to its
Effective sensitization area 1.Subregion 2 in the corresponding fingerprint collecting region of optical lens 2, can be by the fingerprint image of 2 top of subregion
The optical signal that case is reflected is guided to its corresponding effective sensitization area 2.As shown in figure 9, can between subregion 1 and subregion 2
Not overlap.In this way, effective sensitization area 1 and effective sensitization area 2 can respectively acquire the fingerprint image of isolated area, light
The utilization rate for learning the visual field of lens is larger.
Situation 2
It partly overlaps between subregion.
Such as shown in Figure 10, still by taking optical lens 1 and optical lens 2 as an example, in the corresponding fingerprint collecting region of optical lens 1
Subregion 1, the optical signal that the fingerprint pattern of the top of subregion 1 is reflected can be guided to its corresponding effective sensitization area
1.Subregion 2 in the corresponding fingerprint collecting region of optical lens 2, the light that the fingerprint pattern of 2 top of subregion can be reflected
Signal is guided to its corresponding effective sensitization area 2.In Figure 10, partly overlap between subregion 1 and subregion 2.Meeting in this way
Cause the utilization rate of the visual field of optical lens poor, still, effective sensitization area 1 in optical fingerprint sensor and effectively photosensitive
After region 2 detects the reflected light signal of the fingerprint pattern from subregion 1 and subregion 2 respectively, image mosaic can be used
Technology handles the fingerprint pattern in two sub-regions detected, so as to disposably obtain the fingerprint of large area
Image.
Situation 3
As a kind of special circumstances between situation 1 and situation 2, mutually it is close between subregion.
Such as shown in Figure 11, still by taking optical lens 1 and optical lens 2 as an example, in the corresponding fingerprint collecting region of optical lens 1
Subregion 1, the optical signal that the fingerprint pattern of the top of subregion 1 is reflected can be guided to its corresponding effective sensitization area
1.Subregion 2 in the corresponding fingerprint collecting region of optical lens 2, the light that the fingerprint pattern of 2 top of subregion can be reflected
Signal is guided to its corresponding effective sensitization area 2.In Figure 11, subregion 1 is overlapped with the adjacent side of subregion 2.Such case
Under, the utilization rate of the visual field of optical lens is not wasted, and the fingerprint of large area can be obtained based on image mosaic technology
Image.
According to actual use situation, can by setting at least two optical lenses between spacing, come make this at least two
Positional relationship between the corresponding subregion of a optical lens satisfies the use demand.
The embodiment of the present application does not do the positional relationship between at least two optical lenses in fingerprint identification device any
It limits.This at least two optical lens can be arranged with straight line, such as be equally spaced arranged on a horizontal line, such as Figure 12 institute
Effective sensitization area corresponding at least two optical lenses of the straight line arrangement shown；Or this at least two optical lens can also
To arrange according to specific pattern, such as when optical finger print device includes three optical lenses, these three optical lenses can be arranged
Cloth is at triangle, such as effective sensitization area corresponding to three optical lenses of triangular pitch shown in Figure 13.
Optionally, the fingerprint identification device further includes filter unit, filter unit setting in the display screen and
Between the optical fingerprint sensor, the filter unit is for passing the optical signal transmission of specific wavelength to the optical finger print
Sensor.
Wherein, which can be set between display screen and at least two optical lenses, also can be set at this
Between at least two optical lenses and fingerprint identification device.
The wavelength of the selected optical signal of the filter unit for example can be visible wavelength (370nm-780nm) or close
Infrared light wavelength (800nm-1500nm).Optical signal except the corresponding wavelength of the filter unit will not pass through the filtering list
Member reaches the optical sensor array of optical fingerprint sensor, therefore can be used for filtering out stray light to obtain effective optical signal.
Wherein, when the optical fingerprint sensor includes multiple optical fingerprint sensor chips, the fingerprint identification device
It may include multiple filter units, wherein each optical fingerprint sensor chip uses a filter unit or several optics
Fingerprint sensor chip is used in conjunction with a filter unit, alternatively, whole optical fingerprint sensor chips are used in conjunction with a filter
Wave unit.
Optionally, the filter unit can corresponding optical fingerprint sensor chip be packaged together and (such as pass through
The mode and sensor chip of plated film are packaged together)；Alternatively, the light above the corresponding sensor chip of the filter unit
Learn lens packages together；Alternatively, the corresponding sensor chip and optical lens package of the filter unit is together；Or
Person, the filter unit are mounted on fingerprint recognition dress as the component relatively independent with the optical fingerprint sensor and optical lens
The inside set.
It should be understood that being by least two optical lenses for example, at least two in the fingerprint identification device of the embodiment of the present application
Condenser lens realization is modulated the light from fingerprint collecting region, it is of course also possible to pass through other kinds of optical path tune
Device processed is modulated the light from fingerprint collecting region, such as microlens array, collimator, fiber array (have core or nothing
Core) etc..
" at least two " described in the embodiment of the present application include the case where two or more.
In the embodiment of the present application, in Fig. 5, Fig. 6 into Fig. 8, Figure 12 and Figure 13, the part of identical patterns filling can be indicated
With identical function, for sake of simplicity, repeating no more.Also, the embodiment of the present application is between each component in fingerprint identification device 600
Connection type do not do any restriction.
The embodiment of the present application also provides a kind of electronic equipment, which may include display screen and this above-mentioned Shen
It please fingerprint identification device in various embodiments.
The electronic equipment can be any electronic equipment with display screen, use the technical solution of the embodiment of the present application
It realizes and shields lower fingerprint recognition.
The display screen can be using the display screen in above description, such as LCD display or OLED display screen.It is described
When display screen is OLED display screen, the luminescent layer of the display screen includes multiple organic light-emitting diode light sources, wherein the finger
Line identification device is using at least partly excitation light source of the organic light-emitting diode light source as fingerprint recognition.
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 includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence 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 (12)
1. a kind of fingerprint identification device, applied to the electronic equipment with display screen, which is characterized in that the fingerprint identification device
Include:
Optical fingerprint sensor, for being arranged below display screen so that its fingerprint collecting region is at least partially disposed at the display
Within the display area of screen, the optical fingerprint sensor includes at least two effective sensitization areas, and described at least two effectively
Photosensitive region is for detecting the optical signal from the fingerprint collecting overlying regions；
At least two optical lenses, for being arranged between the display screen and the optical fingerprint sensor, described at least two
A optical lens corresponds respectively at least two effective sensitization area, wherein each optical lens is for guiding optical signal
To its corresponding effective sensitization area.
2. fingerprint identification device according to claim 1, which is characterized in that the optical fingerprint sensor includes a light
Fingerprint sensor chip is learned, at least two effective sensitization area is located at the optical fingerprint sensor chip.
3. fingerprint identification device according to claim 1, which is characterized in that the optical fingerprint sensor includes multiple light
Fingerprint sensor chip is learned, at least two effective sensitization area is located at different optical fingerprint sensor chips.
4. fingerprint identification device according to claim 1, which is characterized in that the optical fingerprint sensor includes multiple light
Fingerprint sensor chip is learned, the part effective sensitization area at least two effective sensitization area is located at different optics and refers to
Line sensor chip.
5. fingerprint identification device according to any one of claim 1 to 4, which is characterized in that each optical lens is used for
The optical signal of a sub-regions in the fingerprint collecting region is guided to its corresponding effective sensitization area, wherein not
It partly overlaps between corresponding subregion with optical lens.
6. fingerprint identification device according to any one of claim 1 to 4, which is characterized in that each optical lens is used for
The optical signal of a sub-regions in the fingerprint collecting region is guided to its corresponding effective sensitization area, wherein not
It is not overlapped between corresponding subregion with optical lens.
7. fingerprint identification device according to any one of claim 1 to 6, which is characterized in that at least two optics
The arrangement of lens straight line.
8. fingerprint identification device according to any one of claim 1 to 6, which is characterized in that at least two optics
Lens include three optical lenses, and three optical lenses are arranged into triangle.
9. fingerprint identification device according to any one of claim 1 to 8, which is characterized in that the fingerprint identification device
It further include filter unit, the filter unit is arranged between the display screen and the optical fingerprint sensor, the filtering
Unit is for making the optical signal transmission of specific wavelength to the optical fingerprint sensor.
10. a kind of electronic equipment characterized by comprising
Display screen, and
Fingerprint identification device according to any one of claim 1 to 8.
11. electronic equipment according to claim 10, which is characterized in that the display screen is liquid crystal display LCD.
12. electronic equipment according to claim 10, which is characterized in that the display screen is organic light-emitting diode display
Shield OLED, the luminescent layer of the display screen includes multiple organic light-emitting diode light sources, wherein the fingerprint identification device uses
At least partly excitation light source of the organic light-emitting diode light source as fingerprint recognition.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/112231 WO2020082380A1 (en) | 2018-10-26 | 2018-10-26 | Fingerprint recognition apparatus, and electronic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109496313A true CN109496313A (en) | 2019-03-19 |
| CN109496313B CN109496313B (en) | 2022-05-17 |
Family
ID=65713865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880002083.4A Active CN109496313B (en) | 2018-10-26 | 2018-10-26 | Fingerprint identification device and electronic equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109496313B (en) |
| WO (1) | WO2020082380A1 (en) |
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| CN110291531A (en) * | 2019-05-15 | 2019-09-27 | 深圳市汇顶科技股份有限公司 | The method, apparatus and electronic equipment of fingerprint recognition |
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| CN110796123A (en) * | 2019-11-22 | 2020-02-14 | 深圳阜时科技有限公司 | Optical fingerprint sensing device and electronic equipment |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2020082380A1 (en) | 2020-04-30 |
| CN109496313B (en) | 2022-05-17 |
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