CN110268418A

CN110268418A - The method, apparatus and electronic equipment of fingerprint detection

Info

Publication number: CN110268418A
Application number: CN201980000668.7A
Authority: CN
Inventors: 谢良辉; 丘芳芳
Original assignee: Shenzhen Huiding Technology Co Ltd
Current assignee: Shenzhen Goodix Technology Co Ltd
Priority date: 2019-05-06
Filing date: 2019-05-06
Publication date: 2019-09-20
Anticipated expiration: 2039-05-06
Also published as: WO2020223881A1; CN110268418B

Abstract

A kind of method, apparatus and electronic equipment of fingerprint detection, this method comprises: acquiring multiple fingerprint images respectively based on multiple optical parameters, wherein, the optical parameter includes at least one of exposure time and light intensity, the fingerprint image is that optical fingerprint sensor is obtained based on fingerprint detection signal, the exposure time is the duration that the optical fingerprint sensor acquires the fingerprint detection signal, and the light intensity is to motivate the intensity of the optical signal for fingerprint detection of light source transmitting；Spliced according to multiple partial fingerprint images, obtains the target fingerprint image for fingerprint recognition；Wherein, different fingerprint images of the multiple partial fingerprint image in the multiple fingerprint image, the region of the multiple partial fingerprint image are not overlapped at least partly, and the multiple partial fingerprint image corresponds to different optical parameters.

Description

The method, apparatus and electronic equipment of fingerprint detection

Technical field

This application involves optical finger print technical fields, and more particularly, to a kind of method, apparatus of fingerprint detection and Electronic equipment.

Background technique

The application of optical finger print device brings safe and convenient and fast user experience to user, still, due to optical finger print Device can be realized using lens by the principle of pinhole imaging system, due to the optical imaging concept of lens, optical finger print be caused to fill The central area light-inletting quantity for the pixel array set is bigger than the light-inletting quantity of fringe region, and then lead to the central area of fingerprint image Semaphore is bigger than the semaphore of fringe region, that is to say, that and the central area of fingerprint image is clear, Edge region blur, then plus Upper finger edge is easy to appear the bad situation of contact and eventually leads to fingerprint recognition so that the gap of the semaphore of the two is bigger Rate is lower.

Summary of the invention

The method, apparatus and electronic equipment of a kind of fingerprint detection are provided, fingerprint recognition rate is able to ascend.

In a first aspect, providing a kind of method of fingerprint detection, comprising:

Acquire multiple fingerprint images respectively based on multiple optical parameters, wherein the optical parameter include exposure time and At least one of light intensity, the fingerprint image are that optical fingerprint sensor is obtained based on fingerprint detection signal, the exposure Optical fingerprint sensor described in Shi Changwei acquires the duration of the fingerprint detection signal, and the light intensity is to motivate the use of light source transmitting In the intensity of the optical signal of fingerprint detection；

Spliced according to multiple partial fingerprint images, obtains the target fingerprint image for fingerprint recognition；

Wherein, different fingerprint images of the multiple partial fingerprint image in the multiple fingerprint image, it is described The region of multiple partial fingerprint images is not overlapped at least partly, and the multiple partial fingerprint image corresponds to different optical parameters.

In some possible implementations, the optical fingerprint sensor is for being arranged under the display screen of electronic equipment The square fingerprint image to detect the human finger above the display screen, the fingerprint detection signal are the excitation light source transmittings Optical signal square human finger occurs reflection or scattering and is formed and pass through the display screen by institute on the display screen State the received optical signal of optical fingerprint sensor.

In some possible implementations, the display screen is OLED display screen, the finger of the optical fingerprint sensor Line detection zone is located at the display area of the OLED display screen, and the excitation light source includes the OLED display screen described The part display unit in fingerprint detection region.

In some possible implementations, the partial fingerprint image be by control the OLED display screen with it is described The corresponding display unit of partial fingerprint image shines and is acquired acquisition using the optical fingerprint sensor；Wherein, The exposure time is corresponding with fluorescent lifetime of display unit when as the excitation light source, alternatively, the light intensity For the luminous intensity of the display unit.

It is described to acquire multiple fingerprint images respectively based on multiple optical parameters in some possible implementations, comprising: Based at least one the first exposure time, at least one first fingerprint image is acquired；And

Based at least one the second exposure time, at least one second fingerprint image is acquired.

It is described to acquire multiple fingerprint images respectively based on multiple optical parameters in some possible implementations, comprising:

Based at least one the first light intensity, at least one first fingerprint image is acquired；And

Based at least one the second light intensity, at least one second fingerprint image is acquired.

It is described to be spliced according to multiple partial fingerprint images in some possible implementations, it obtains for fingerprint The target fingerprint image of identification, comprising: according to the local fingerprint figure in the first area of at least one first fingerprint image Picture determines the first sub fingerprint image；According to the partial fingerprint image in the second area of at least one second fingerprint image, Determine the second sub fingerprint image；Spliced according to the first sub fingerprint image and the second sub fingerprint image, obtains institute State target fingerprint image.

In some possible implementations, in the first area of at least one first fingerprint image according to Partial fingerprint image determines the first sub fingerprint image, comprising:

If at least one described first fingerprint image includes first fingerprint image, by the of first fingerprint image Partial fingerprint image in one region is determined as the first sub fingerprint image；Or

If at least one described first fingerprint image includes multiple first fingerprint images, to the multiple first fingerprint image First area in partial fingerprint image handled, obtain the first sub fingerprint image.

In some possible implementations, the part in the first area to the multiple first fingerprint image refers to Print image is handled, and the first sub fingerprint image is obtained, comprising:

It averages to the partial fingerprint image in the first area of the multiple first fingerprint image, asks maximum Value, or it is weighted processing according to specific weight, obtain the first sub fingerprint image.

In some possible implementations, at least one described first exposure time it is equal or it is described at least one One exposure time differs；Or

At least one described second exposure time is equal or described at least one second exposure time differs.

In some possible implementations, the multiple partial fingerprint image includes first partial fingerprint image and second Partial fingerprint image, the region of the first partial fingerprint image than second partial fingerprint image region closer to fingerprint The central area of image, the corresponding exposure time of the first partial fingerprint image are corresponding less than second partial fingerprint image Exposure time or the corresponding light intensity of the first partial fingerprint image be less than the corresponding light of second partial fingerprint image By force.

In some possible implementations, the target fingerprint image is obtained by multiple sub fingerprint image mosaics, According to the center of the multiple sub fingerprint image and fingerprint image by as far as close sequence, the multiple sub fingerprint image is corresponding Exposure time successively successively decreases or the corresponding light intensity of the multiple sub fingerprint image is successively successively decreased.

In some possible implementations, the multiple optical parameter is the pixel according to the optical fingerprint sensor In array in the pixel value of fingerprint image of the pixel acquisition of different zones, saturation degree, contrast and acutance at least one of Determining.

In some possible implementations, the corresponding region of the multiple partial fingerprint image is concentric circles or concentrically Straight-flanked ring.

Second aspect provides a kind of device of fingerprint detection, comprising:

Optical fingerprint sensor, for acquiring multiple fingerprint images respectively based on multiple optical parameters, wherein the optics Parameter includes at least one of exposure time and light intensity, and the fingerprint image is that the optical fingerprint sensor is examined based on fingerprint Survey what signal obtained, the exposure time is the duration that the optical fingerprint sensor acquires the fingerprint detection signal, described Light intensity is to motivate the intensity of the optical signal for fingerprint detection of light source transmitting；

Processing module obtains the target fingerprint for fingerprint recognition for being spliced according to multiple partial fingerprint images Image；

In some possible implementations, the partial fingerprint image be by control the OLED display screen with it is described The corresponding display unit of partial fingerprint image shines and is acquired acquisition using the optical fingerprint sensor, wherein The exposure time is corresponding with fluorescent lifetime of display unit when as the excitation light source, alternatively, the light intensity For the luminous intensity of the display unit.

In some possible implementations, the optical fingerprint sensor is specifically used for:

Based at least one the first exposure time, at least one first fingerprint image is acquired；And

In some possible implementations, the processing module is specifically used for: according at least one described first fingerprint Partial fingerprint image in the first area of image determines the first sub fingerprint image；

According to the partial fingerprint image in the second area of at least one second fingerprint image, the second sub fingerprint is determined Image；

Spliced according to the first sub fingerprint image and the second sub fingerprint image, obtains the target fingerprint figure Picture.

In some possible implementations, the processing module is also used to:

In some possible implementations, the processing module is specifically used for:

In some possible implementations, described device further include:

Light source driver module, for driving the excitation light source to emit the multiple light respectively to the fingerprint detection region Strong optical signal.

In some possible implementations, the light source driver module is aobvious for driving the display screen to carry out picture The driver module or display driver shown.

The third aspect provides a kind of chip, which includes input/output interface, at least one processor, at least one A memory and bus, at least one processor for storing instruction, at least one processor for call this at least one Instruction in a memory, the method in any possible implementation to execute first aspect or first aspect.

Fourth aspect provides a kind of electronic equipment, including display screen and the fingerprint being arranged in below display screen inspection The device of survey, wherein the device of the fingerprint detection is as in any possible implementation of second aspect or second aspect The device of fingerprint detection.

5th aspect, provides a kind of electronic equipment, including the chip in such as third aspect.

6th aspect, provides a kind of computer-readable medium, for storing computer program, the computer program packet Include the instruction in any possible implementation for executing above-mentioned first aspect or first aspect.

7th aspect, provides a kind of computer program product including instruction, when computer runs the computer journey When the finger of sequence product, the computer is executed in any possible implementation of above-mentioned first aspect or first aspect The method of fingerprint detection.

Specifically, which can run on electronic equipment of the above-mentioned fourth aspect into the 5th aspect On.

Detailed description of the invention

Figure 1A is the directional views according to the electronic equipment of one embodiment of the application.

Figure 1B is cut-away section structural schematic diagram of the electronic equipment shown in figure 1A along A-A '.

Fig. 2 is the exposure time of fingerprint image and the change curve of pixel value.

Fig. 3 is the schematic flow chart according to the method for the fingerprint detection of the embodiment of the present application.

Fig. 4 to Figure 11 is to acquire fingerprint image by different exposure times, and then spliced to obtain target fingerprint figure The exemplary diagram of picture.

Figure 12 is the semaphore distribution map of the fingerprint image based on single exposure time and based on the acquisition of multiple exposure times.

Figure 13 is the schematic block diagram according to the device of the fingerprint detection of the embodiment of the present application.

Figure 14 is according to a kind of system structure diagram of the finger print detection device of embodiment of the application.

Figure 15 is the system structure diagram according to the finger print detection device of the application another kind embodiment.

Figure 16 is the schematic block diagram according to the electronic equipment of the embodiment of the present application.

Specific embodiment

Below in conjunction with attached drawing, the technical solution in the application is described.

As a kind of common application scenarios, optical fingerprint systems provided by the embodiments of the present application can be applied in intelligent hand Machine, tablet computer and other with the mobile terminal of display screen or other terminal devices；More specifically, being set in above-mentioned terminal In standby, fingerprint identification device can be specially optical finger print device, can be set regional area below display screen or Whole region, to form (Under-display) optical fingerprint systems under screen.Alternatively, the fingerprint identification device can also be with Inside some or all of display screen for being integrated to the terminal device, to form (In-display) optical finger print system in screen System.

Figure 1A and Figure 1B shows the schematic diagram for the electronic equipment that the embodiment of the present application can be applicable in, wherein Fig. 1 is electronics The front schematic view of equipment 10, Figure 1B are cut-away section structural schematic diagram of the electronic equipment 10 shown in figure 1A along A-A '.

As shown in FIG. 1A and 1B, the electronic equipment 10 includes display screen 120 and optical finger print device 130, wherein institute State the regional area that optical finger print device 130 is arranged in below the display screen 120.The optical finger print device 130 includes light Fingerprint sensor is learned, the optical fingerprint sensor includes the induction arrays with multiple optical sensor units, the induction battle array It arranges region or its induction region is the fingerprint detection region 103 of the optical finger print device 130.As shown in Figure 1A, institute Fingerprint detection region 103 is stated to be located among the display area of the display screen 120.In a kind of alternate embodiment, the optics Fingerprint device 130 can also be arranged in other positions, for example, the display screen 120 side or the electronic equipment 10 side The non-transparent region of edge, and directed into the optical signal of at least partly display area of the display screen 120 by light path design The optical finger print device 130, so that the fingerprint detection region 103 is physically located the display of the display screen 120 Region.

It should be appreciated that the area in the fingerprint detection region 103 can be with the induction arrays of the optical finger print device 130 Area it is different, such as example, by light path design, reflective foldings light path design or other light convergence of lens imaging Or the light path designs such as reflection, the area in the fingerprint detection region 103 of the optical finger print device 130 can be made to be greater than described The area of 130 induction arrays of optical finger print device.Other substitution implementations in, if using such as light collimating fashion into The guidance of row optical path, the fingerprint detection region 103 of the optical finger print device 130 can also be designed to and the optical finger print device The area of 130 induction arrays 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 120, it can realize that fingerprint inputs.Since fingerprint is examined Surveying can realize in screen, therefore fingerprint is arranged without the special reserved space in its front in electronic equipment 10 using the above structure Key (such as Home key), so as to which using screen scheme comprehensively, i.e., the display area of the described display screen 120 can extend substantially To the front of entire electronic equipment 10.

As a kind of optional implementation, as shown in Figure 1B, the optical finger print device 130 includes light detecting portion 134 and optical module 132, the light detecting portion 134 includes the induction arrays and is electrically connected with the induction arrays Reading circuit and other auxiliary circuits, a chip (Die) can be produced on by semiconductor technology, for example, optics at As chip or optical fingerprint sensor, the induction arrays are specially optical detector (Photo detector) array, packet Multiple optical detectors in array distribution are included, the optical detector can be used as optical sensor unit as described above；It is described Optical module 132 can be set in the top of the induction arrays of the light detecting portion 134, can specifically include filter layer (Filter), optical waveguide layer or optical path guide structure and other optical elements, the filter layer, which can be used for filtering out, penetrates finger Environment light, and the optical waveguide layer or optical path guide structure are mainly used for being directed to institute from the reflected reflected light of finger surface It states induction arrays and carries out optical detection.

In specific implementation, the optical module 132 can be encapsulated in the same optics with the light detecting portion 134 and refer to Line component.For example, the optical module 132 can be encapsulated in the same optical finger print chip with the optical detecting parts 134, The optical module 132 can also be arranged in the chip exterior where the light detecting portion 134, than optics group as will be described Part 132 is fitted in above the chip, or the subelement of the optical module 132 is integrated among said chip.

Wherein, there are many implementations for the optical waveguide layer of the optical module 132 or optical path guide structure, for example, described Optical waveguide layer can be specially collimator (Collimator) layer being made in semi-conductor silicon chip, with multiple collimation units Or microwell array, the collimation unit can be specially aperture, from the reflected reflected light of finger, impinge perpendicularly on institute The light for stating collimation unit can be passed through and be received by optical sensor unit below, and the excessive light of incident angle is in institute State and be attenuated by multiple reflections inside collimation unit, thus each optical sensor unit can only receive substantially its just on The reflected reflected light of fingerprint lines of side, so that the induction arrays can detect the fingerprint image of finger.

In another embodiment, the optical waveguide layer or optical path guide structure may be optical lens (Lens) layer, It has one or more lens units, such as the lens group of one or more non-spherical lens compositions, and being used for will be from finger Reflected reflected light converges to the induction arrays of light detecting portion 134 below, so that the induction arrays can be with It is imaged based on the reflected light, to obtain the fingerprint image of the finger.Optionally, the optical lens mirror layer is described Pin hole can also be formed in the optical path of lens unit, the pin hole can cooperate the optical lens mirror layer expansion optics to refer to The visual field of line device, to improve the fingerprint imaging effect of the optical finger print device 130.

In other embodiments, the optical waveguide layer or optical path guide structure can also specifically use lenticule (Micro- Lens) layer, the microlens layer have the microlens array formed by multiple lenticules, can pass through semiconductor growing process Or other techniques are formed in above the induction arrays of the light detecting portion 134, and each lenticule can be right respectively One of sensing unit of induction arrays described in Ying Yu.Also, it can be between the microlens layer and the sensing unit Other optical film layers, such as dielectric layer or passivation layer are formed, more specifically, between the microlens layer and the sensing unit It can also include the light blocking layer with micropore, wherein the micropore is formed between its corresponding lenticule and sensing unit, institute Optical interference between contiguous microlens and sensing unit can be stopped by stating light blocking layer, and be made corresponding to the sensing unit Light is converged to inside the micropore by the lenticule and is transferred to the sensing unit via the micropore to carry out light Learn fingerprint imaging.

It should be appreciated that several implementations of above-mentioned optical path guide structure can be used alone and can also be used in combination, than Such as, microlens layer can be further set below the collimator layer or the optical lens mirror layer.Certainly, in the collimation Device layer when perhaps the optical lens mirror layer is used in combination with the microlens layer its specific laminated construction or optical path may need It is adjusted according to actual needs.

As a kind of optional embodiment, the display screen 120 can use the display screen with spontaneous light display unit, Such as Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) display screen or micro-led (Micro-LED) display screen.For using OLED display screen, it is aobvious that the optical finger print device 130 can use the OLED Display screen 120 is located at the excitation that the display unit (i.e. OLED light source) in the fingerprint detection region 103 detects as optical finger print Light source.When finger pressing is at the fingerprint detection region 103, display screen 120 can show one in the fingerprint detection region A specific hot spot, to issue fingerprint excitation light to the target finger of 103 top of fingerprint detection region, which can Reflected light is reflected to form with the surface in finger or passes through the finger interior and scatters and forms scattering light, related special In benefit application, for ease of description, above-mentioned reflected light and scattering light are referred to as reflected light.Due to the ridge (ridge) of fingerprint and valley (valley) different for the albedo of light, therefore, the reflected light from fingerprint ridge and the transmitting light from fingerprint valley have Different light intensity, reflected light are received and converted to phase after optical module, by the induction arrays in optical finger print device 130 The electric signal answered, i.e. fingerprint detection signal；Fingerprint image data can be obtained based on the fingerprint detection signal, and can be with Further progress fingerprint matching verifying, to realize optical finger print identification function in the electronic equipment 10.

In other embodiments, the optical finger print device 130 can also be mentioned using built-in light source or external light source For the optical signal for carrying out fingerprint detection.In this case, the optical finger print device 130 can be adapted for non-spontaneous light Display screen, such as liquid crystal display or other passive light emitting displays.To apply with backlight module and liquid crystal display panel Liquid crystal display for, for support liquid crystal display screen under fingerprint detection, the optical fingerprint systems of the electronic equipment 10 It can also include the excitation light source for optical finger print detection, the excitation light source can be specially infrared light supply or certain wave The light source of long non-visible light, can be set below the backlight module of the liquid crystal display or setting is set in the electronics Fringe region below standby 10 cover sheet, and liquid crystal display panel or protection cap can be set in the optical finger print device 130 It guides below the fringe region of plate and by optical path so that fingerprint detection light can reach the optical finger print device 130；Or Person, the optical finger print device 130 also can be set below the backlight module, and the backlight module passes through to diffusion The film layers such as piece, blast piece, reflector plate carry out aperture or other optical designs with allow fingerprint detection light pass through liquid crystal display panel and Backlight module simultaneously reaches the optical finger print device 130.When the use optical finger print device 130 use built-in light source or outside Light source is set come when providing the optical signal for carrying out fingerprint detection, testing principle is consistent with content is described above.

It should be understood that the electronic equipment 10 further includes transparency protected cover board, and the cover board can in specific implementation Think glass cover-plate or sapphire cover board, be located at the top of the display screen 120 and cover the electronic equipment 10 just Face.Because in the embodiment of the present application, so-called finger pressing actually refers to pressing in the display in the display screen 120 The cover board of 120 top of screen or the protective layer of the covering cover board.

On the other hand, in certain embodiments, the optical finger print device 130 can only include an optical finger print sensing Device, the area in the fingerprint detection region 103 of optical finger print device 130 is smaller at this time and position is fixed, therefore user is referring to Line needs for finger to be pressed into the specific position in the fingerprint detection region 103 when inputting, otherwise optical finger print device 130 may Fingerprint image can not be collected and cause user experience bad.In other alternate embodiments, the optical finger print device 130 can To specifically include multiple optical fingerprint sensors；The multiple optical fingerprint sensor can be disposed side by side on by connecting method The lower section of the display screen 120, and the induction region of the multiple optical fingerprint sensor collectively forms the optical finger print dress Set 130 fingerprint detection region 103.In other words, the fingerprint detection region 103 of the optical finger print device 130 may include Multiple subregions, each subregion correspond respectively to the induction region of one of optical fingerprint sensor, thus by the light The fingerprint collecting region 103 of fingerprint device 130 can extend to the main region of the lower half portion of the display screen, that is, extend To the usual pressing area of finger, to realize that blind input by formula fingerprint operates.Alternatively, when the optical fingerprint sensor number When measuring enough, the fingerprint detection region 130 can be extended to half of display area even entire display area, to realize Half screen or full frame fingerprint detection.

It should be understood that the optical finger print device in the embodiment of the present application is referred to as optical finger print identification mould group, fingerprint dress It sets, fingerprint identification device, fingerprint recognition mould group, fingerprint mould group, fingerprint acquisition device etc..

Due to the optical imaging concept of the optical module (for example, lens) of optical finger print device, the optical finger print is caused to fill The central area light-inletting quantity for the pixel array (corresponding to previously described induction arrays) set is bigger than the light-inletting quantity of fringe region, into And cause the semaphore of the central area of fingerprint image bigger than the semaphore of fringe region, that is to say, that the center of fingerprint image Region is clear, Edge region blur, contacts bad situation along with finger edge is easy to appear, so that the semaphore of the two Gap is bigger, and it is lower to eventually lead to fingerprint recognition rate.

Specifically, this is because the central area of pixel array and fringe region carry out the corresponding linear model of fingerprint collecting Caused by enclosing difference, it is illustrated in figure 2 the pixel value of exposure time and the fingerprint image of acquisition used in acquisition fingerprint image Relation curve, it is seen that within the scope of certain exposure time, exposure time and pixel value are in a linear relationship, are more than that this is linear The pixel value of range, fingerprint image enters saturation region, and the fingerprint image in the range of linearity is effective.

Due to the influence of optical module, the light-inletting quantity of central area is usually bigger than the light-inletting quantity of fringe region, this is resulted in When fingerprint collecting, the semaphore of central area than the semaphore of fringe region promotion speed faster, according to lesser exposure Duration carries out fingerprint collecting, can guarantee the pixel value of central area in the linear range, but the semaphore of fringe region is more It is small, fingerprint collecting is carried out according to biggish exposure time, the semaphore of fringe region can get a promotion, but central area Signal can enter saturation region in advance, and then cause acquisition central area fingerprint image failure.

In view of this, the embodiment of the present application provides a kind of fingerprint detection scheme, referred to by the different time for exposure Partial fingerprint image effective in the fingerprint image of acquisition is further spliced, obtains target fingerprint by the acquisition of print image Then image carries out fingerprint recognition using the target fingerprint image, to promote fingerprint recognition rate.

Fig. 3 is a kind of schematic flow chart of the method for fingerprint detection provided by the embodiments of the present application, it should be appreciated that the fingerprint The method 300 of detection can be applied in the device or electronic equipment of fingerprint detection.As shown in figure 3, the method for the fingerprint detection 300 may include following content:

S310 acquires multiple fingerprint images based on multiple optical parameters respectively, wherein when the optical parameter includes exposure At least one of long and light intensity；

S320 is spliced according to multiple partial fingerprint images, obtains the target fingerprint image for fingerprint recognition, In, different fingerprint images of the multiple partial fingerprint image in the multiple fingerprint image, the multiple part refers to The region of print image is not overlapped at least partly, and the multiple partial fingerprint image corresponds to different exposure times.

Wherein, the exposure time can correspond to the optical parameter of optical fingerprint sensor, which can correspond to The optical parameter of excitation light source for fingerprint detection, the embodiment of the present application can also be based on other optical fingerprint sensors and swash Other optical parameters for encouraging light source acquire multiple fingerprint images.

Figure 13 and Figure 14 is combined first, and letter is carried out to the working principle of the device 500 of the fingerprint detection of the embodiment of the present application Unitary declaration.

In the embodiment of the present application, the device 500 of the fingerprint detection can be set under the display screen 200 of electronic equipment Side, the display screen 200 can correspond to display screen 120 shown in FIG. 1, and the fingerprint detection region 230 of the display screen 200 can be Fingerprint detection region 103 shown in FIG. 1.

In the embodiment shown in fig. 13, the display screen 200 can be specially that (for example OLED is shown self light emitting display panel Screen), and it includes multiple spontaneous light display units 201 (such as OLED pixel or OLED light source), the self-luminous display is single Member 201 under the driving of driver module for carrying out luminous so that the display screen 200 shows corresponding picture.

Optionally, in some embodiments, the part in the fingerprint detection region 230 is located in the display screen 200 certainly The device 20 that luminescence display unit 201 can be used as the fingerprint detection carries out the excitation light source of fingerprint detection, is used for described Fingerprint detection region 230 emits optical signal to form the hot spot of predetermined pattern in the fingerprint detection region 230.The application is implemented In the partial fingerprint image can be that the OLED display screen is corresponding with the partial fingerprint image to be shown by controlling Show that unit shines and is acquired acquisition using the optical fingerprint sensor, wherein the exposure time and the display Fluorescent lifetime of unit when as the excitation light source is corresponding, alternatively, the light intensity is the luminous light of the display unit By force.

Optionally, in further embodiments, or in the external light source that the device of the fingerprint detection is additionally arranged, , as the excitation light source of detection, the external light source 540 equally be can be set described The lower section of display screen 200, for emitting optical signal to the fingerprint detection region 230 of the display screen 200 to examine in the fingerprint Survey the hot spot that region 230 forms predetermined pattern.

Optionally, in the embodiment of the present application, the excitation light source can be driven to emit by light source driver module The intensity of optical signal, to show the hot spot of the predetermined pattern in the fingerprint detection region 230.

For using the spontaneous light display unit of the display screen 200 as the excitation light source of the finger print detection device 20, The excitation light source may include red-light source, green-light source and blue light source, for example, the red display list of the display screen 200 Member, green display unit and blue display unit control the transmitting of these three light sources by the driver module of the display screen Optical signal ratio and/or the optical parameters such as gray value, can control the optical signal emitted to the fingerprint detection region 230 Intensity.

The light intensity for fingerprint collecting in the embodiment of the present application can be the light intensity of the optical signal of excitation light source transmitting, should Light intensity can by control excitation light source in red-light source, green-light source and blue light source transmitting optical signal ratio and/ Or the optical parameters such as gray value are controlled.Usually, light intensity is bigger, and the pixel value in the fingerprint image of acquisition is bigger, instead It, light intensity is smaller, and the pixel value in the fingerprint image of acquisition is smaller.Therefore, by the different multiple fingerprint images of intensity collection, The partial fingerprint image that pixel value in multiple fingerprint image is in same level may further be spliced, be obtained complete Target fingerprint image.

It should be understood that exposure time in the embodiment of the present application refers to fingerprint detection signal being incident on fingerprint sensing On the induction arrays of device, the time to be opened of shutter, wherein the fingerprint detection signal is in the fingerprint detection area of display screen The optical signal that optical signal corresponding to the predetermined pattern that domain is formed is formed in user's finger reflection or scattering.Usually, it exposes Light time is longer, enters the amount of the optical signal of induction arrays with regard to big, correspondingly, the picture of the fingerprint image of fingerprint sensor acquisition Element value is bigger.Specifically, the corresponding range of linearity of different zones (for example, fringe region and central area) in pixel array Difference, then based on an exposure time acquisition fingerprint image in, the fingerprint image only in specific region is only effectively, That is, the pixel value of the fingerprint image in the specific region is denoted as valid data in the range of linearity, by the specific region Area or effective image-region.In this way, an exposure time can correspond to an effective image-region, acquired based on the exposure time Fingerprint image may further splice target fingerprint figure according to the partial fingerprint image in the effective image-region of the fingerprint image Picture.

For example, can be by first the first fingerprint image of intensity collection, and pass through second the second fingerprint image of intensity collection Picture, wherein the first light intensity is greater than the second light intensity, for the fingerprint image for same intensity collection, the finger of fringe region The semaphore of print image is smaller relative to the semaphore of central area, therefore, in one implementation, is carrying out target fingerprint It, can be by the center of the partial fingerprint image of the fringe region in the first fingerprint image and the second fingerprint image when image mosaic The partial fingerprint image in domain is spliced to obtain the target fingerprint image.

It is similar with the relationship of exposure time and pixel value based on this, it, can also in the fingerprint image based on certain light intensity acquisition To think that the fingerprint image of only specific region is effectively, for example, the central area of the lesser fingerprint image of light intensity can be recognized To be effectively, the fringe region of the biggish fingerprint image of light intensity be may be considered effectively.That is, an it is also assumed that light intensity An effective image-region can be corresponded to, the intensity collection fingerprint image is based on, it may further having according to the fingerprint image The partial fingerprint image imitated in image-region splices target fingerprint image.

In the embodiment of the present application, the device of the fingerprint detection can be based on multiple exposure times or multiple intensity collections Multiple fingerprint images, different exposure times or light intensity can consider corresponding different effective image-region, may further root Spliced according to the partial fingerprint image in the effective image-region of multiple fingerprint image, obtains complete target fingerprint figure Picture is able to ascend whole frame since the target fingerprint image is spliced by the partial fingerprint image in effective image-region The semaphore of fingerprint image, to promote fingerprint recognition rate.

Therefore, in the embodiment of the present application, the acquisition of fingerprint image can be carried out using different exposure times or light intensity, into One step can be spliced according to the partial fingerprint image in the regional area of fingerprint image, obtain the target for fingerprint recognition Fingerprint image, that is to say, that the target fingerprint image can come from the fingerprint image using different exposure time or intensity collection Picture advantageously accounts for the low problem of fingerprint recognition rate caused by the corresponding range of linearity difference of different zones of pixel array.

It should be noted that the embodiment of the present application can also carry out fingerprint image according to multiple other parameters, which can To influence the pixel value of the fingerprint image of acquisition, for example, the gray scale of the optical signal for fingerprint collecting, color, degree of dispersion etc., The embodiment of the present application is not construed as limiting this.

Hereinafter, with based on multiple exposure times carry out fingerprint collecting, and further according to multiple fingerprint images of acquisition into Row splicing obtains being illustrated for target fingerprint image, carries out fingerprint collecting based on multiple light intensity, and according to the multiple of acquisition The specific implementation that fingerprint image is spliced to obtain target fingerprint image is similar, and which is not described herein again.

Optionally, in some embodiments, directly the multiple partial fingerprint image can be spliced to obtain described Target fingerprint image.

For example, the multiple fingerprint image includes the first fingerprint image and the second fingerprint image, the multiple local fingerprint Image may include the first partial fingerprint image from the first fingerprint image, and the from the second fingerprint image second part Fingerprint image, wherein the first partial fingerprint image and second partial fingerprint image can correspond in fingerprint image Different zones can obtain the target with first partial fingerprint image described in direct splicing and second partial fingerprint image and refer to Print image.

Optionally, in further embodiments, the multiple partial fingerprint image can also be handled, is obtained multiple Sub fingerprint image is further spliced multiple sub fingerprint image to obtain the target fingerprint image.

The partial fingerprint image in target fingerprint image to be known as sub fingerprint image, which refers to convenient for distinguishing and illustrating Print image can come from the partial fingerprint image in the fingerprint image of acquisition, or may be the office in the fingerprint image acquired What portion's fingerprint image was obtained by processing.That is, the sub fingerprint image can be partial fingerprint image, or may be Other fingerprint images that multiple partial fingerprint images are handled.

For example, the multiple fingerprint image includes the first fingerprint image, the second fingerprint image and third fingerprint image, it is described Multiple partial fingerprint images include the first partial fingerprint image from the first fingerprint image, and second from the second fingerprint image Partial fingerprint image and third partial fingerprint image from third fingerprint image, wherein the first partial fingerprint image is corresponding First area in fingerprint image, second partial fingerprint image and third partial fingerprint image can correspond in fingerprint image Second area, for example, second fingerprint image and third fingerprint image can be based on same exposure time acquisition.

As a kind of optional implementation, in excitation light of the display unit using OLED display screen as fingerprint detection When source, for the first partial fingerprint image for obtaining first fingerprint image, can control with the first partial fingerprint image Corresponding OLED display unit shines, and the OLED display unit in other regions does not shine, and is passed using the optical finger print Sensor carries out fingerprint image acquisition, to get the first partial fingerprint image of first fingerprint image；Analogously, exist It, can also when obtaining the third partial fingerprint image of the second partial fingerprint image and the third fingerprint image of second fingerprint image It is shone respectively with the OLED display unit for controlling respectively with second partial fingerprint image and the third partial fingerprint image And fingerprint image acquisition is carried out using the optical fingerprint sensor.Wherein, when obtaining the exposure of above-mentioned partial fingerprint image Length can be corresponding with fluorescent lifetime of OLED display unit when as the excitation light source.

As another optional implementation, the optical fingerprint sensor acquire the first partial fingerprint image, When second partial fingerprint image and the third partial fingerprint image, can only it enable respectively and above-mentioned local fingerprint figure As the progress optical signalling detection of corresponding sensing unit and acquisition, in this case, the institute as fingerprint detection excitation light source Stating shining for the display unit of OLED display screen can be using common control mode, without carrying out special light emitting control. For example, can control single for the OLED display of fingerprint detection to obtain the first partial fingerprint image of first fingerprint image It is first all to shine, and the sensing unit enabled in the first area of the optical fingerprint sensor carries out fingerprint image acquisition, from And the first partial fingerprint image is got, for the second partial fingerprint image, the acquisition modes of third partial fingerprint image It is similar.

Alternatively, for the first partial fingerprint image for obtaining first fingerprint image, can be controlled in other alternate embodiments OLED display unit of the system for fingerprint detection all shines, and enables the optical fingerprint sensor progress fingerprint image and adopt Collection, so that first fingerprint image is got, further, by the office in the first area of first fingerprint image Portion's fingerprint image extracts to obtain the first partial fingerprint image, for the second partial fingerprint image, third local fingerprint The acquisition modes of image are similar.

Optionally, in the embodiment of the present application, the exposure time of partial fingerprint image and shining when the excitation light source The corresponding time can be when acquiring the partial fingerprint image, and the exposure time of the partial fingerprint image is in the excitation In the range of the luminous duration of light source, for example, the exposure time is equal to the luminous duration or the exposure time is less than The luminous duration.

In the embodiment of the present application, which is by the first sub fingerprint image and the second sub fingerprint image mosaic It obtains, wherein the first sub fingerprint image corresponds to first area, which corresponds to second area.In one kind In implementation, which can be the first partial fingerprint image, and the second sub fingerprint image can root It is determined according to second partial fingerprint image and third partial fingerprint image, for example, can be by second partial fingerprint image and the The pixel value of corresponding pixel points is averaged in three partial fingerprint images, or is handled according to specific Weight, is obtained described Second sub fingerprint image.

Optionally, in the embodiment of the present application, the multiple exposure time can entirely different or the multiple exposure Duration can also part it is identical, the embodiment of the present application is not construed as limiting this.

For example, multiple fingerprint images can be acquired based on different exposure times, then having multiple fingerprint image Partial fingerprint image in effect image-region is spliced, and the target fingerprint image is obtained.

In another example at least two fingerprint images can also be acquired based at least two identical exposure times, extremely based on this Partial fingerprint image in the effective image-region of few two fingerprint images determines the corresponding sub fingerprint figure of the effective image-region Picture, further by the sub fingerprint image mosaic into the corresponding region of target fingerprint image, that is to say, that can be based on identical Exposure time determines the sub fingerprint image in regional area.

Hereinafter, illustrating acquisition and the connecting method of the fingerprint image according to the embodiment of the present application in conjunction with Fig. 4 to Figure 11.

Optionally, as one embodiment, the S310 may include:

The first fingerprint image is acquired based on the first exposure time；And

The second fingerprint image is acquired based on the second exposure time；

Wherein, the first exposure time is different with second exposure time.

Optionally, as another embodiment, the S310 may include:

Further, described to be spliced according to multiple partial fingerprint images, obtain the target fingerprint for fingerprint recognition Image, comprising:

According to the second game in the first partial fingerprint image and second fingerprint image in first fingerprint image Portion's fingerprint image is spliced, and the target fingerprint image is obtained.

Optionally, in some embodiments, if the region where the first partial fingerprint image is than second part Region where fingerprint image is closer to the central area of fingerprint image, then the corresponding exposure time of first partial fingerprint image Exposure time corresponding less than second partial fingerprint image, i.e., when described first exposure time is less than the described second exposure It is long, that is to say, that for the corresponding effective image-region of lesser exposure time closer to central area, biggish exposure time is corresponding Effective exposure area closer to fringe region.

Optionally, in further embodiments, if the region where the first partial fingerprint image is than the second game Region where portion's fingerprint image is closer to the central area of fingerprint image, then the corresponding light intensity of first partial fingerprint image is small In the corresponding light intensity of second partial fingerprint image, that is to say, that the corresponding effective image-region of lesser light intensity closer to Central area, the corresponding effective exposure area of biggish light intensity is closer to fringe region.

Therefore, in the embodiment of the present application, can use lesser exposure time or intensity collection effective image-region for The fingerprint image of central area can be in such manner, it is possible to the fingerprint image of the biggish central area of light-inletting quantity is made to be in linear zone Use biggish exposure time or intensity collection effective image-region for the fingerprint image of fringe region, in such manner, it is possible to promote side The semaphore in edge region, so that the semaphore of central area and fringe region reaches comparable level, relative to improving The clarity of whole frame fingerprint image, so as to promote fingerprint recognition rate.

Optionally, in certain embodiments, if the target fingerprint image is obtained by multiple sub fingerprint image mosaics It arrives, then according to the center of the multiple sub fingerprint image and fingerprint image by as far as close sequence, the multiple sub fingerprint figure As corresponding exposure time successively successively decreases or the corresponding light intensity of the multiple sub fingerprint image is successively successively decreased.

That is, the sub fingerprint image in the sub fingerprint image of the target fingerprint image, closer to central area Corresponding exposure time is smaller, for example, as shown in figure 5, three sub- fingerprint images according to the sequence from edge to center, it is corresponding Exposure time or light intensity successively reduce, in this way, exposure time or light intensity can cooperate with the light-inletting quantity of corresponding region, so that entirely The semaphore in region is in comparable level, so as to guarantee the clarity of whole frame fingerprint image, and then promotes fingerprint recognition Rate.

As shown in figure 4, fingerprint image 1, the corresponding effective image area of exposure time 1 can be acquired based on exposure time 1 Domain is the region where partial fingerprint image 1, at this moment need to only guarantee the pixel value in partial fingerprint image 1 in the range of linearity i.e. Can, it is not required to consider whether the fingerprint image in other regions is in the range of linearity.Fingerprint image 2 is acquired based on exposure time 2, it should The corresponding effective image-region of exposure time 2 is the region where partial fingerprint image 2, at this moment need to only guarantee partial fingerprint image Pixel value in 2 is in the range of linearity, is not required to consider whether the fingerprint image in other regions is in the range of linearity.Then Partial fingerprint image 1 and partial fingerprint image 2 are spliced, target fingerprint image is obtained.

In a specific embodiment, the exposure time 1 can be less than exposure time 2, in this case, the local fingerprint Image 1 can be the partial fingerprint image of the central area of the fingerprint image 1, which can be the fingerprint image As the partial fingerprint image of 2 fringe region.

It should be noted that in the example depicted in fig. 9, target fingerprint image can come from four of four fingerprint images Regional area, acquiring exposure time used by four fingerprint images can be according to the pixel in four regional areas The range of linearity determine, although this embodiment does not distinguish central area and fringe region, relative to taking into account entire picture For the range of linearity of each pixel in pixel array, the range of linearity for taking into account each pixel in regional area is easier It realizes, the quality of the fingerprint image in each regional area can be improved to a certain extent, and then promote whole frame fingerprint image Quality.

Optionally, as another embodiment, the S310 includes:

Based at least two first exposure times, at least two first fingerprint images are acquired；And

Based at least two second exposure times, at least two second fingerprint images are acquired.

According to the partial fingerprint image in the first area of at least two first fingerprint image, the first sub fingerprint is determined Image；

According to the partial fingerprint image in the second area of at least two second fingerprint image, the second sub fingerprint is determined Image；

Optionally, at least two first exposure time is equal or at least two first exposure time can also be with Differ.

Optionally, at least two second exposure time is equal or at least two second exposure time can also be with Differ.

It should be understood that the first area is the corresponding effective image-region of the first exposure time, the second area be this The corresponding effective image-region of two exposure times.

Therefore, in the embodiment of the present application, can be for splicing the sub fingerprint image of target fingerprint image from fingerprint Partial fingerprint image in image is also possible to be handled by multiple partial fingerprint images.

Optionally, in some embodiments, in the first area according at least two first fingerprint image Partial fingerprint image determines the first sub fingerprint image, comprising:

Partial fingerprint image in the first area of at least two first fingerprint image is handled, is obtained described First sub fingerprint image.

For example, being averaging to the partial fingerprint image in the first area of at least two first fingerprint image Value, maximizing, or the modes such as be weighted according to specific weight and handled, obtain the first sub fingerprint image.

Similarly, can also the partial fingerprint image in the second area at least two second fingerprint image carry out It averages, maximizing, or it is weighted processing according to specific weight, the second sub fingerprint image is obtained, here not It repeats again.

It is illustrated by taking Figure 11 as an example, exposure time 1 can be based on, exposure time 2 and exposure time 3 acquire three first Fingerprint image, and it is based on exposure time 4, exposure time 5 and exposure time 6 acquire three the second fingerprint images, further may be used To determine the first sub fingerprint image, Yi Jigen according to the partial fingerprint image in the first area in three first fingerprint images The second sub fingerprint image is determined according to the partial fingerprint image in the second area of three second fingerprint images, it then can be by institute It states the first sub fingerprint image and the second word fingerprint image is spliced, obtain the target fingerprint image.

Optionally, the exposure time 1, exposure time 2 and exposure time 3 can be equal, or can not also wait, the exposure Light time long 1, exposure time 2 and exposure time 3 can correspond to same effective image-region, that is to say, that in the effective image area Pixel in domain is based on the exposure time 1, and the pixel value that exposure time 2 and exposure time 3 acquire is all in the linear range.Class As, for the exposure time 4, exposure time 5 and exposure time 6 are also in this way, which is not described herein again.

It should be understood that in some embodiments, the device of the fingerprint detection can be acquired multiple complete based on multiple exposure times Whole fingerprint image can also acquire multiple partial fingerprint images, the office based on multiple exposure times in further embodiments Portion's fingerprint image is the fingerprint image in the corresponding effective image-region of exposure time.

With continued reference to Fig. 4, in one implementation, can be acquired respectively completely based on exposure time 1 and exposure time 2 Fingerprint image 1 and fingerprint image 2, then spelled using the partial fingerprint image in the fingerprint image 1 and fingerprint image 2 It connects；In another implementation, partial fingerprint image 1 and part can be acquired based on exposure time 1 and exposure time 2 respectively Fingerprint image 2, wherein the partial fingerprint image 1 is the fingerprint image in the corresponding effective image-region of exposure time 1, should Partial fingerprint image 2 is the fingerprint image in the corresponding effective image-region of exposure time 2, in this implementation, is only needed The partial pixel point in pixel array is closed, for example, closing the pixel in other regions when acquisition partial fingerprint image 1 Point closes the pixel in other regions when acquiring partial fingerprint image 2, so as to reduce the power consumption of fingerprint collecting.

It should be understood that the number of fingerprint image is merely illustrative in above embodiments, in the embodiment of the present application, it can also be acquired His several fingerprint images, for determining the target fingerprint image, for example, 4,5 or more, referring to Fig. 5 to Figure 10 In example.

It should also be understood that the number of multiple partial fingerprint images described above or the number of effective image-region are only to show Example, the embodiment of the present application are not particularly limited this, for example, can be spliced according to more partial fingerprint images, obtain The target fingerprint image, for example, 3 (as shown in Fig. 5 to Fig. 8) or more (as shown in fig. 9 or 10).

It should be noted that the embodiment of the present application is not particularly limited the local fingerprint figure for splicing target fingerprint image As the shape in corresponding region (in other words, effective image-region), for example, can be circle, triangle, rectangle, Huo Zheqi His rule or irregular shape, such as example of the Fig. 5 into Figure 10.

It in the embodiment of the present application, can be according to the pixel in the different zones of the pixel array of optical fingerprint sensor At least one of in the pixel value of the fingerprint image of acquisition, saturation degree, contrast and acutance, determine the part acquired in the region The optical parameter of fingerprint image.

It is illustrated, pixel array can be divided into more by taking the pixel value according to fingerprint image determines exposure time as an example A region, such as pixel array can be divided by multiple regions according to the photosensitive degree of different zones in pixel array.Into one Step can acquire fingerprint image by multiple exposure times, establish the picture of the fingerprint image of the pixel acquisition in multiple region The change curve of element value and multiple exposure time, each region can correspond to a change curve, for example, as shown in Fig. 2, so Afterwards according to the change curve, the exposure time for acquiring the partial fingerprint image in the region is determined, based on exposure time acquisition The partial fingerprint image in the region can be further used for splicing target fingerprint image in fingerprint image.

Figure 12 shows using single exposure time and obtains fingerprint using multiple exposure times progress fingerprint image acquisition The semaphore distribution map of image.In Figure 12, using multiple first exposure times, the first fingerprint image of multiframe is acquired, for example, such as It is based on exposure time 1 shown in Figure 11, exposure time 2 and exposure time 3 acquire multiple fingerprint images, and based on multiple the Two exposure times acquire the second fingerprint image of multiframe, for example, as shown in Figure 11 based on exposure time 4,5 He of exposure time Exposure time 6 acquires multiple fingerprint images, further by first fingerprint image of multiframe and the second fingerprint image of the multiframe into Row splicing, obtains target fingerprint image, that is, the fingerprint image combined.

It can be recognized from fig. 12 that carrying out fingerprint image acquisition using multiple exposure times, and then splices obtained target and refer to Print image (corresponding to the combined result in figure) is for the fingerprint image using the acquisition of single exposure time, fringe region Semaphore get a promotion, optimize the clarity of whole frame fingerprint image, so as to promote fingerprint recognition rate, implementing In, refuse sincere (False Rejection Rate, FRR) index optimization 2~3%.

More than, in conjunction with Fig. 3 to Figure 12, the present processes embodiment is described in detail, below in conjunction with Figure 13 to Figure 16, in detail The Installation practice of thin description the application, it should be appreciated that Installation practice is corresponded to each other with embodiment of the method, and similar description can be with Reference method embodiment.

As shown in figure 13, the device 500 of the fingerprint detection may include:

Optical fingerprint sensor 510 acquires multiple fingerprint images for being used to be based on multiple optical parameters, wherein institute respectively Stating optical parameter includes at least one of exposure time and light intensity, and the fingerprint image is that the optical fingerprint sensor is based on Fingerprint detection signal obtain, the exposure time be the optical fingerprint sensor acquire the fingerprint detection signal when Long, the light intensity is to motivate the intensity of the optical signal for fingerprint detection of light source transmitting；

Processing module 520 obtains referring to for the target of fingerprint recognition for being spliced according to multiple partial fingerprint images Print image；

Optionally, in some embodiments, the optical fingerprint sensor is for being arranged under the display screen of electronic equipment The square fingerprint image to detect the human finger above the display screen, the fingerprint detection signal are the excitation light source transmittings Optical signal square human finger occurs reflection or scattering and is formed and pass through the display screen by institute on the display screen State the received optical signal of optical fingerprint sensor.

Optionally, in some embodiments, the display screen is OLED display screen, the fingerprint of the optical fingerprint sensor Detection zone is located at the display area of the OLED display screen, and the excitation light source includes the OLED display screen in the finger The part display unit of line detection zone, as shown in figure 13.

Optionally, in some embodiments, the excitation light source is the internal or external light source 540 of described device 500, example Such as, as shown in figure 14.

Optionally, in some embodiments, the partial fingerprint image be by control the OLED display screen with it is described The corresponding display unit of partial fingerprint image shines and is acquired acquisition using the optical fingerprint sensor, wherein The exposure time is corresponding with fluorescent lifetime of display unit when as the excitation light source, alternatively, the light intensity For the luminous intensity of the display unit.

Optionally, in some embodiments, described device 500 further include:

Optionally, in some embodiments, the light source driver module is aobvious for driving the display screen to carry out picture The driver module or display driver shown.

Optionally, in the embodiment of the present application, which can also include optical module 530, shown in Figure 13 and Figure 14 Embodiment in, the optical module 530 can specifically include one or more optical lens, can pass through described aobvious The reflected light signal or fingerprint detection signal gathering of display screen 230 direct into the optical fingerprint sensor 510.Specifically Ground, the optical module 530 can be the optical module 132 in Fig. 1, and which is not described herein again.

Optionally, in some embodiments, the processing module 520 can be specially dress of the configuration in the fingerprint detection The microprocessor in 500 is set, or, or the application processing of terminal device applied by the device 10 of the fingerprint detection Device or other processors or controller.

Optionally, in some embodiments, the optical fingerprint sensor 510 is specifically used for:

Optionally, in some embodiments, the processing module 520 is specifically used for: according at least one described first finger Partial fingerprint image in the first area of print image determines the first sub fingerprint image；

Optionally, in some embodiments, the processing module 520 is also used to:

Optionally, in some embodiments, the processing module 520 is specifically used for:

Optionally, in some embodiments, at least one described first exposure time it is equal or it is described at least one first Exposure time etc.；Or

Optionally, in some embodiments, the multiple partial fingerprint image includes first partial fingerprint image and second Partial fingerprint image, the region of the first partial fingerprint image than second partial fingerprint image region closer to fingerprint The central area of image, the corresponding exposure time of the first partial fingerprint image are corresponding less than second partial fingerprint image Exposure time or the corresponding light intensity of the first partial fingerprint image be less than the corresponding light of second partial fingerprint image By force.

Optionally, in some embodiments, the target fingerprint image is obtained by multiple sub fingerprint image mosaics, is pressed According to the center of the multiple sub fingerprint image and fingerprint image by as far as close sequence, the corresponding exposure of the multiple sub fingerprint image Light time length is successively successively decreased or the corresponding light intensity of the multiple sub fingerprint image is successively successively decreased.

Optionally, in some embodiments, the multiple optical parameter is the pixel according to the optical fingerprint sensor In array in the pixel value of fingerprint image of the pixel acquisition of different zones, saturation degree, contrast and acutance at least one of Determining.

The corresponding region of the multiple partial fingerprint image is concentric circles or straight-flanked ring concentrically.

The embodiment of the present application also provides a kind of electronic equipment 800, and as shown in figure 16, the electronic equipment 800 can wrap The device 810 of display screen 820 and above-mentioned fingerprint detection is included, the device 810 of the fingerprint detection can be in previous embodiment The device 500 of fingerprint detection, and the lower section of the display screen 820 is set.

It should be understood that in the embodiment of the present application, the device 810 of the fingerprint detection can be used for executing preceding method embodiment In content, for sake of simplicity, which is not described herein again.

As a kind of optional embodiment, the display screen 820 has spontaneous light display unit, and the self-luminous display is single The device 810 that member can be used as the fingerprint detection is used to carry out the excitation light source of fingerprint detection.

It should be understood that magnitude of the sequence numbers of the above procedures are not meant to execute suitable in the present processes embodiment Sequence it is successive, the execution of each process sequence should be determined by its function and internal logic, the implementation without coping with the embodiment of the present application Process constitutes any restriction.

It should be understood that the processor or processing module of the embodiment of the present application can be a kind of IC chip, there is signal Processing capacity.During realization, each step of above method embodiment can be patrolled by the integrated of the hardware in processor The instruction for collecting circuit or software form is completed.Above-mentioned processor can be general processor, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit (Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other can Programmed logic device, discrete gate or transistor logic, discrete hardware components.It may be implemented or execute the application implementation Disclosed each method, step and logic diagram in example.General processor can be microprocessor or the processor can also be with It is any conventional processor etc..The step of method in conjunction with disclosed in the embodiment of the present application, can be embodied directly in hardware decoding Processor executes completion, or in decoding processor hardware and software module combination execute completion.Software module can position In random access memory, flash memory, read-only memory, programmable read only memory or electrically erasable programmable memory, register In the storage medium of equal this fields maturation.The storage medium is located at memory, and processor reads the information in memory, in conjunction with it Hardware completes the step of above method.

It is appreciated that the electronic equipment of the embodiment of the present application can also include memory, memory can be volatibility and deposit Reservoir or nonvolatile memory, or may include both volatile and non-volatile memories.Wherein, nonvolatile memory can Be read-only memory (Read-Only Memory, ROM), programmable read only memory (Programmable ROM, PROM), Erasable Programmable Read Only Memory EPROM (Erasable PROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.Volatile memory can be random access memory (Random Access Memory, RAM), it is used as External Cache.By exemplary but be not restricted explanation, many forms RAM is available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), Double Data Rate synchronous dynamic Random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), synchronized links dynamic random access memory (Synchlink DRAM, SLDRAM) and straight Meet rambus random access memory (Direct Rambus RAM, DR RAM).It should be noted that system described herein and side The memory of method is intended to include but is not limited to the memory of these and any other suitable type.

The embodiment of the present application also proposed a kind of computer readable storage medium, the computer-readable recording medium storage one A or multiple programs, the one or more program include instruction, and the instruction is when by the portable electronic including multiple application programs When equipment executes, the method for portable electronic device execution embodiment illustrated in fig. 3 can be made.

The embodiment of the present application also proposed a kind of computer program, which includes instruction, when the computer journey When sequence is computer-executed, the method that allows computer to execute embodiment illustrated in fig. 3.

The embodiment of the present application also provides a kind of chip, which includes input/output interface, at least one processor, extremely A few memory and bus, for storing instruction, at least one processor is for calling this extremely for at least one processor Instruction in a few memory, the method to execute embodiment illustrated in fig. 3.

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 and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.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.

It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description, The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.

In several embodiments provided herein, it should be understood that arriving, disclosed systems, devices and methods can To realize by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit Division, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or group Part can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown Or the mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, device or unit it is indirect Coupling or communication connection can be electrical property, mechanical or other forms.

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.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme 's.

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, can also be integrated in one unit with two or more units.

It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product It is stored in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially in other words The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, institute Computer software product is stated to be stored in a storage medium, including some instructions are used so that computer equipment (can be with It is personal computer, server or the network equipment etc.) execute all or part of step of each embodiment the method for the application Suddenly.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), deposits at random The various media that can store program code such as access to memory (Random Access Memory, RAM), magnetic or disk.

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 easily think of the change or the replacement, and should all contain Lid is within the scope of protection of this application.Therefore, the protection scope of the application shall be subject to the protection scope of the claim.

Claims

1. a kind of method of fingerprint detection, which is characterized in that the method for the fingerprint detection includes:

Multiple fingerprint images are acquired respectively based on multiple optical parameters, wherein the optical parameter includes exposure time and light intensity At least one of, the fingerprint image is that optical fingerprint sensor is obtained based on fingerprint detection signal, the exposure time The duration of the fingerprint detection signal is acquired for the optical fingerprint sensor, the light intensity is to motivate light source to emit for referring to The intensity of the optical signal of line detection；

Wherein, different fingerprint images of the multiple partial fingerprint image in the multiple fingerprint image, it is the multiple The region of partial fingerprint image is not overlapped at least partly, and the multiple partial fingerprint image corresponds to different optical parameters.

2. the method according to claim 1, wherein the optical fingerprint sensor is for being arranged in electronic equipment Display screen below to detect the fingerprint image of the human finger above the display screen, the fingerprint detection signal is described to swash Encouraging the optical signal of light source transmitting, square human finger occurs reflection or scattering and is formed and passed through described on the display screen Display screen is by the received optical signal of the optical fingerprint sensor.

3. according to the method described in claim 2, it is characterized in that, the display screen is OLED display screen, the optical finger print The fingerprint detection region of sensor is located at the display area of the OLED display screen, and the excitation light source includes the OLED aobvious Part display unit of the display screen in the fingerprint detection region.

4. according to the method described in claim 3, it is characterized in that, the partial fingerprint image is aobvious by controlling the OLED Display screen display unit corresponding with the partial fingerprint image is shone and is acquired using the optical fingerprint sensor and obtained It takes；Wherein, the exposure time is corresponding with fluorescent lifetime of display unit when as the excitation light source, or Person, the light intensity are the luminous intensity of the display unit.

5. method according to claim 1 to 4, which is characterized in that described to be distinguished based on multiple optical parameters Acquire multiple fingerprint images, comprising:

6. the method according to any one of claims 1 to 5, which is characterized in that described to be distinguished based on multiple optical parameters Acquire multiple fingerprint images, comprising:

7. method according to claim 5 or 6, which is characterized in that it is described to be spliced according to multiple partial fingerprint images, Obtain the target fingerprint image for fingerprint recognition, comprising:

According to the partial fingerprint image in the first area of at least one first fingerprint image, the first sub fingerprint figure is determined Picture；

According to the partial fingerprint image in the second area of at least one second fingerprint image, the second sub fingerprint figure is determined Picture；

Spliced according to the first sub fingerprint image and the second sub fingerprint image, obtains the target fingerprint image.

8. the method according to the description of claim 7 is characterized in that the of at least one first fingerprint image according to Partial fingerprint image in one region determines the first sub fingerprint image, comprising:

If at least one described first fingerprint image includes first fingerprint image, by the firstth area of first fingerprint image Partial fingerprint image in domain is determined as the first sub fingerprint image；Or

If at least one described first fingerprint image includes multiple first fingerprint images, to the of the multiple first fingerprint image Partial fingerprint image in one region is handled, and the first sub fingerprint image is obtained.

9. according to the method described in claim 8, it is characterized in that, the first area to the multiple first fingerprint image In partial fingerprint image handled, obtain the first sub fingerprint image, comprising:

It averages to the partial fingerprint image in the first area of the multiple first fingerprint image, maximizing, or It is weighted processing according to specific weight, obtains the first sub fingerprint image.

10. method according to any one of claim 1 to 9, which is characterized in that the multiple partial fingerprint image includes The region of first partial fingerprint image and the second partial fingerprint image, the first partial fingerprint image locally refers to than described second Closer to the central area of fingerprint image, the corresponding exposure time of the first partial fingerprint image is less than institute in the region of print image It states the corresponding exposure time of the second partial fingerprint image or the corresponding light intensity of the first partial fingerprint image is less than described second The corresponding light intensity of partial fingerprint image.

11. method according to any one of claim 1 to 10, which is characterized in that the target fingerprint image is by more What a sub- fingerprint image spliced, according to the center of the multiple sub fingerprint image and fingerprint image by as far as close sequence, The corresponding exposure time of the multiple sub fingerprint image successively successively decreases or the corresponding light intensity of the multiple sub fingerprint image is successively passed Subtract.

12. method according to any one of claim 1 to 11, which is characterized in that the multiple optical parameter is basis The pixel value of fingerprint image of the pixel acquisition of different zones in the pixel array of the optical fingerprint sensor, saturation degree, In contrast and acutance at least one of determine.

13. method according to any one of claim 1 to 12, which is characterized in that the multiple partial fingerprint image pair Straight-flanked ring of the region answered for concentric circles or concentrically.

14. a kind of device of fingerprint detection characterized by comprising

Optical fingerprint sensor, for acquiring multiple fingerprint images respectively based on multiple optical parameters, wherein the optical parameter Including at least one of exposure time and light intensity, the fingerprint image is that the optical fingerprint sensor is believed based on fingerprint detection It number obtains, the exposure time is that the optical fingerprint sensor acquires the duration of the fingerprint detection signal, the light intensity For the intensity of the optical signal for fingerprint detection of excitation light source transmitting；

Processing module obtains the target fingerprint image for fingerprint recognition for being spliced according to multiple partial fingerprint images；

15. device according to claim 14, which is characterized in that the optical fingerprint sensor is set for being arranged in electronics The fingerprint image of the human finger above the display screen is detected below standby display screen, the fingerprint detection signal is described The human finger of side occurs to reflect or scatter and formed and across institute the optical signal of excitation light source transmitting on the display screen Display screen is stated by the received optical signal of the optical fingerprint sensor.

16. device according to claim 15, which is characterized in that the display screen is OLED display screen, and the optics refers to The fingerprint detection region of line sensor is located at the display area of the OLED display screen, and the excitation light source includes the OLED Part display unit of the display screen in the fingerprint detection region.

17. device according to claim 16, which is characterized in that the partial fingerprint image is by controlling the OLED Display screen display unit corresponding with the partial fingerprint image is shone and is acquired using the optical fingerprint sensor It obtaining, wherein the exposure time is corresponding with fluorescent lifetime of display unit when as the excitation light source, or Person, the light intensity are the luminous intensity of the display unit.

18. device described in any one of 4 to 17 according to claim 1, which is characterized in that the optical fingerprint sensor is specific For:

19. device described in any one of 4 to 18 according to claim 1, which is characterized in that the optical fingerprint sensor is specific For:

20. device described in 8 or 19 according to claim 1, which is characterized in that the processing module is specifically used for: according to described Partial fingerprint image in the first area of at least one the first fingerprint image determines the first sub fingerprint image；

21. device according to claim 20, which is characterized in that the processing module is also used to:

22. device according to claim 21, which is characterized in that the processing module is specifically used for:

23. device described in any one of 4 to 22 according to claim 1, which is characterized in that the multiple partial fingerprint image packet First partial fingerprint image and the second partial fingerprint image are included, the region of the first partial fingerprint image is than second part Closer to the central area of fingerprint image, the corresponding exposure time of the first partial fingerprint image is less than in the region of fingerprint image The corresponding exposure time of second partial fingerprint image or the corresponding light intensity of the first partial fingerprint image are less than described the The corresponding light intensity of two partial fingerprint images.

24. device described in any one of 4 to 23 according to claim 1, which is characterized in that the target fingerprint image is by more What a sub- fingerprint image spliced, according to the center of the multiple sub fingerprint image and fingerprint image by as far as close sequence, The corresponding exposure time of the multiple sub fingerprint image successively successively decreases or the corresponding light intensity of the multiple sub fingerprint image is successively passed Subtract.

25. device described in any one of 4 to 24 according to claim 1, which is characterized in that the multiple optical parameter is basis The pixel value of fingerprint image of the pixel acquisition of different zones in the pixel array of the optical fingerprint sensor, saturation degree, In contrast and acutance at least one of determine.

26. device described in any one of 4 to 25 according to claim 1, which is characterized in that the multiple partial fingerprint image pair Straight-flanked ring of the region answered for concentric circles or concentrically.

27. device described in any one of 4 to 26 according to claim 1, which is characterized in that described device further include:

Light source driver module, for driving the excitation light source to emit the multiple light intensity respectively to the fingerprint detection region Optical signal.

28. device according to claim 27, which is characterized in that the light source driver module is for driving the display Screen carries out the driver module or display driver that picture is shown.

29. a kind of electronic equipment, which is characterized in that the dress including display screen and the fingerprint detection being arranged in below the display screen It sets, wherein the device of the fingerprint detection is the device of the fingerprint detection as described in any one of claim 14 to 28.