CN105320926B - Fingerprint sensor - Google Patents
Fingerprint sensor Download PDFInfo
- Publication number
- CN105320926B CN105320926B CN201510035933.9A CN201510035933A CN105320926B CN 105320926 B CN105320926 B CN 105320926B CN 201510035933 A CN201510035933 A CN 201510035933A CN 105320926 B CN105320926 B CN 105320926B
- Authority
- CN
- China
- Prior art keywords
- area
- lens
- filter
- capture device
- light source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Image Input (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The present invention discloses a kind of fingerprint sensor, including an at least first light source, one lens, one filter, one first speculum and a video capture device, lens receive light source irradiation, a first area and a second area are formed on lens, filter and the first speculum are set to lens base, and first area and the second area of lens are corresponded to respectively, filter and the first speculum reflect the partial fingerprints image of first area and second area respectively, video capture device is receiving the partial fingerprints image of first area and second area that filter and the first speculum are reflected, the partial fingerprints image which part of first area and second area is identical, by handling the identical fingerprints image of first area and second area to obtain a complete finger print image.Fingerprint sensor can effectively reduce thickness, can apply on the electronic product of slimming.
Description
Technical field
The present invention relates to a kind of fingerprint sensors, more particularly to a kind of optical fingerprint sensor.
Background technology
Fingerprint sensor can be distinguished into two kinds of condenser type and optical profile type in main product at present on the market.
Wherein, condenser type is that the quantity of electric charge difference of fingerprint peaks and troughs when pressing chip surface by fingerprint is referred to sensing
Schlieren picture, advantage are slimming, but of high cost, and the correctness and durability that sense be not still high.
The fingerprint sensor of optical profile type is the image that fingerprint is taken using image-forming principle, and the more capacitive advantage of optical profile type is
Identification is high, cheap and extremely durable, but is limited to camera lens and needs to maintain a certain distance with sensing face just understand
Imaging and light advance distance make the fingerprint sensor volume of optical profile type become larger thicker.
Due to electronic product thinning tendency now, each producer, which wants to produce the optical profile type being more thinned one after another, to be referred to
Line sensor structure, with the internal structure of the electronic product in response to slimming.
Existing optical fingerprint sensor is the light path by prism and speculum catoptric imaging, shortens sensing whereby
Air line distance between face and camera lens, to reduce the thickness of optical fingerprint sensor.
An existing embodiment is enumerated herein, according to U.S. Patent No. 8,405,757, the wherein group of finger print pressing
Part is prism structure, makes to image in prism by the characteristic of light refraction and reflects and project, and is reflected again by speculum later
Light path is to lens imaging.
In other existing technologies, in order to solve the demand of slimming, difference is, some are from special lens structure
Set about, or design the prism of various labyrinths, remove the thickness of reduction optical fingerprint sensor, is applied to mobile phone to increase
Or the possibility of tablet.
But the existing optical fingerprint sensor reflected light path is complicated, makes degree of having any problem, therefore
The cost of these optical fingerprint sensors is higher always, and many designs is caused all only to rest on the experimental stage, practical volume production
Product is simultaneously few, and thickness can not also break through 6.5mm or less.
In view of this, it is necessary to propose that a kind of simplified structure, low cost and thickness can break through 6.5mm light below
Formula fingerprint sensor.
Invention content
The purpose of the present invention is be directed to the deficiencies in the prior art to propose a kind of simplified structure, low cost and thickness
6.5mm optical fingerprint sensors below can be broken through.
To reach the purpose, the present invention discloses a kind of fingerprint sensor, including:One lens, top surface and bottom surface are plane,
An at least first area and a second area are formed on lens;One filter, is set to lens base, and filter corresponds to the of lens
One region, to reflect the fingerprint image of first area;One first speculum, is set to lens base, and the first speculum corresponds to
The second area of lens, to reflect the fingerprint image in second area;And a video capture device, to receive filter and first
The fingerprint image of first area and second area that speculum is reflected, filter are set to the first speculum to image capture
Between the light path of device, the fingerprint image of first area reflexes to video capture device, the fingerprint image warp of second area via filter
Filter is penetrated again after being reflected by the first speculum, is received later by video capture device;An at least first light source, provides image capture
Device receives light source required when fingerprint image.
As a further improvement, the filter is polarization spectro filter or two color filters or part luminous intensity reflective portion
Luminous intensity penetrates filter.
As a further improvement, the video capture device is zoomed image acquisition device or auto-focusing image capture
Device.
As a further improvement, the filter to the light path between video capture device passes through at least one second speculum
Reflection.
As a further improvement, the filter is polarization spectro filter, and a polarization is arranged in front of the video capture device
The light path of optical selector, first area to video capture device is the first light path, and first light path is in filter to video capture device
Between light path pass through a polarization rotating joint.
As a further improvement, the first light source is replaced by an at least second light source and an at least third light source, the
Two light sources irradiate first area, and third light source irradiates the color difference of second area, second light source and third light source.
As a further improvement, the first light source is replaced by infrared light, and infrared light is set to below lens, and image is picked
It is infrared light video camera to take device.
As a further improvement, at least one the 4th light source is set around the lens top surface.
As a further improvement, an at least near-infrared light source is set below the lens.
As a further improvement, the first light source is arranged in the side of lens, and the light of first light source is by lens
Side enters lens.
As a further improvement, the fingerprint image of the first area and the fingerprint image of second area are having the same
Characteristic area.
In conclusion compared with prior art, the present invention the identification of the fingerprint sensor of the present invention is high, and can be effective
Thickness is reduced, can apply on the electronic product of slimming, and reduces the manufacturing cost of fingerprint sensor.
Description of the drawings
Fig. 1 is the side sectional view of fingerprint sensor first embodiment of the present invention.
Fig. 2 is the vertical view of the lens of fingerprint sensor of the present invention, shows the first area on wherein lens and the secondth area
Domain some overlappings.
Fig. 3 is the light source of fingerprint sensor of the present invention in the schematic diagram of lens inner total reflection.
Fig. 4 is the imaging of the video capture device of fingerprint sensor of the present invention, shows the imaging of first area and second area
Pattern magnitude is different and is overlapped.
Fig. 5 is the side sectional view of the second embodiment of fingerprint sensor of the present invention.
Fig. 6 is the side sectional view of the 3rd embodiment of fingerprint sensor of the present invention.
Fig. 7 is the imaging of the video capture device of the 3rd embodiment of fingerprint sensor of the present invention, shows first area and
The imagewise pattern size in two regions is identical and non-overlapping.
Fig. 8 is the side sectional view of the fourth embodiment of fingerprint sensor of the present invention.
Fig. 9 A are the first light path of the fourth embodiment of fingerprint sensor of the present invention and the light path schematic diagram of the second light path.
Fig. 9 B are the light path schematic diagrams of the noise light source of the fourth embodiment of fingerprint sensor of the present invention.
Figure 10 is the side sectional view of the 5th embodiment of fingerprint sensor of the present invention.
Figure 11 is the side sectional view of the sixth embodiment of fingerprint sensor of the present invention.
Figure 12 is the side sectional view of the 7th embodiment of fingerprint sensor of the present invention.
Figure 13 is the side sectional view of the 8th embodiment of fingerprint sensor of the present invention.
Figure 14 is the side sectional view of the 9th embodiment of fingerprint sensor of the present invention.
Figure 15 is the light source of fingerprint sensor of the present invention in being carried out at the same time total reflection in lens and penetrate showing for lens surface
It is intended to.
It is each in figure that the reference numerals are as follows.
Fingerprint sensor 100,200,300,400,
500、600、700、800、900
1 first light path 10 of first light source
Second light path, 11 second light source 12
The 4th light source 14 of third light source 13
15 infrared light 16 of near-infrared light source
2 first area 20 of lens
21 characteristic area 22 of second area
30 first speculum 31 of filter
Second speculum, 32 polarization rotating joint 33
Polarize optical selector 34
Video capture device 4,40,41
Infrared light video camera 42.
Specific implementation mode
For technology contents, construction feature, institute's reached purpose and effect that the present invention will be described in detail, hereby illustrates and coordinate below
Attached drawing is explained in detail.
Referring to Fig. 1, the present invention discloses a kind of fingerprint sensor 100, fingerprint sensor 100 is installed on electronic device
(not shown), to be imaged (imaging) fingerprint.Fingerprint sensor 100 includes at least one first light in the first embodiment
Source 1, a lens 2, a filter 30, one first speculum 31 and a video capture device 4.First light source 1 is arranged in the side of lens 2
And it is contour with lens 2, the light of first light source 1 enters lens by the side of lens 2, and filter 30 and the first speculum 31 are set to
2 bottom surface of lens, video capture device 4 to receive filter 30 and the first speculum 31 reflection image.Lens 2 can by glass or
Transparent plastic is made, and the top surface and bottom surface of lens 2 are plane.
First light source 1 is irradiated by 2 side of lens, first light source 1 penetrate to after in lens 2 according to total reflection law in
It is totally reflected in lens 2, when finger is pressed in 2 top surface of lens, the wave crest of fingerprint is the total reflection destroyed in lens 2, makes lens 2
Fingerprint image is generated on bottom surface, the irradiation being totally reflected by 2 side of lens by first light source 1, video capture device 4 can obtain
To the fingerprint pattern of high contrast.
Please refer to Fig. 2, a first area 20 and a second area 21 are formed on lens 2, filter 30 and first is instead
First area 20 and second area 21 that mirror 31 corresponds to lens 2 respectively are penetrated, first area 20 and second area 21 are for finger
Pressing, makes one piece of complete fingerprint be distinguished into two-part fingerprint image by first area 20 and second area 21 respectively, when
After finger is pressed in 2 top surface of lens, and lens 2 receive the irradiation of first light source 1, the first area 20 and second on lens 2
In region 21 by generate respectively first area 20 fingerprint image and second area 21 fingerprint image for video capture device 4 at
The fingerprint of picture, imaging can obtain a complete fingerprint image by image processing software splicing.
Video capture device 4 receives the first area 20 and second area 21 that filter 30 and the first speculum 31 are reflected
Fingerprint image, filter 30 is set to the first speculum 31 between the light path of video capture device 4, the fingerprint image of first area 20
As reflexing to video capture device 4 via filter 30, after the fingerprint image of the second area 21 is reflected via the first speculum 31
Filter 30 is penetrated again, is received later by video capture device 4.
Referring to Fig. 2, in order to increase image processing software to divide fingerprint identification, the first area 20 of lens 2 with
Second area 21 partly overlaps, fingerprint image wherein some phase of the fingerprint image for making first area 20 and second area 21
Together, because first area 20 and second area 21 image in the middle part of the fingerprint image in video capture device 4, split-phase is same, makes image procossing
Software can be by recognizing first area 20 with identical part in 21 image of second area to be spliced into one piece of fingerprint image.
Referring to Fig. 3, further explaining, imaging caused by the total reflection light source in lens 2 passes through with general prism
The imaging that fingerprint wave crest absorbs the generation black lines of first light source 1 is different, when the first light source 1 in lens 2 is just being totally reflected
When, the first light source 1 of total reflection is because that can not penetrate 2 bottom surface of lens, therefore video capture device 4 can't receive first light source 1,
Until fingerprint wave crest is pressed in 2 top surface of lens, fingerprint wave crest destroys the reflection angle of total reflection originally, makes the light of first light source 1
The first light source 1 that line scattering penetrates 2 bottom surface of lens is collected by video capture device 4, therefore video capture device 4 be not pressed into
Part do not receive first light source 1 yet, have the first light source 1 for being partially received fingerprint lines scattering being pressed into, whereby shape
At a bright fingerprint image, reach the effect for improving image comparison.
It further illustrates, the first light source 1 of fingerprint sensor of the present invention and the unlimited side for being set to lens 2, the first light
Source 1 is provided for required light source when video capture device 4 receives fingerprint image, and set position makes fingerprint image can reach
As having enough light sources to enter video capture device 4.
It further illustrates, referring to Fig. 4, since first area 20 is Chong Die in 2 last points of lens with second area 21, because
This first area 20 and the fingerprint image of second area 21 will produce identical characteristic area 22 when imaging in video capture device 4,
Characteristic area 22 shows that the fingerprint image characteristics of first area 20 are identical as the fingerprint image characteristics part of second area 21, leads to
Splicing first area 20 is crossed with the identical fingerprints image of second area 21 to obtain one piece of complete finger print image, is further illustrated,
It, can be for image processing software lock-in feature region 22 and by first area 20 and second because the characteristic of fingerprint image is identical
The characteristic area 22 of the fingerprint image in region 21 is completely overlapped, can correctly be spliced into complete fingerprint image.
Because filter 30 and the first speculum 31 are then first area 20 and the in tandem relative to video capture device 4
The length of the light path in two regions 21 to video capture device 4 is different, and the light path of first area 20 to video capture device 4 is the first light path
10, the light path of second area 21 to video capture device 4 is the second light path 11, and the first light path 10 is short compared with the second light path 11, because of light path
Length is inconsistent, and the fingerprint image of first area 20 and the fingerprint image of second area 21 are big in the image in video capture device 4
Small difference, and in tandem because of filter 30 and the first speculum 31, in the first light path 10 and the second light path 11 to video capture device 4
Shi Guanglu can be overlapped, and the fingerprint image of first area 20 and second area 21 also can in the imaging that video capture device 4 is captured
Overlapping, according to Fig.4,.
In order to overcome fingerprint image to be overlapped and light path inconsistence problems, in the present embodiment, video capture device 4 is zoomed image
Acquisition device or auto-focusing video capture device when video capture device 4 is adjusted to the burnt section of the first light path 10, make first whereby
The fingerprint image imaging in region 20 is clear but the fingerprint image image blur of second area 21, when video capture device 4 adjust to
The burnt section of second light path 11 makes the fingerprint image of second area 21 be imaged the clear but fingerprint image of first area 20 imaging mould
Paste, thus image processing software can capture the fingerprint image of clear first area 20 and second area 21 respectively, connect
It, the fingerprint image of first area 20 and second area 21 can be zoomed in and out and spliced by image processing software, at
For a complete fingerprint image, and passes through this complete fingerprint image and complete identification of fingerprint.
In the present embodiment, filter 30 can use polarization spectro filter, can also use two color filters, or can also select
Filter is penetrated with part luminous intensity reflective portion luminous intensity, being intended to reach on filter 30, there is specific light to penetrate and specific light is anti-
The effect penetrated.First light source 1 is preferably selected as white light.It should be noted that when filter 30 is using two color filters, light source is necessary
Selection has the ingredient that can be penetrated and be reflected by two color filters.
Referring to Fig. 5, in a second embodiment, a kind of fingerprint sensor 200, structure is essentially identical with first embodiment,
The difference is that first light source 1 is white light or comprising the light source with the ingredient that can be penetrated and be reflected by two color filters, filter
Mirror 30 is selected as two color filters, and the depth of field length of video capture device 40 includes the difference of 11 length of the first light path 10 and the second light path
Away from, and without zoom.
Specifically, when first light source 1 is white light, filter 30 is selected as green reflection and blue light penetrates, first area 20
First light path 10 goes out green light by 30 back reflection of filter, and the second light path 11 of second area 21 becomes blue light after penetrating filter 30,
First area 20 and second area 21 image in the fingerprint image of video capture device 40 whereby will be presented green and blue respectively, make
Image processing software can be by identifying fingerprint image color, and the first area 20 and second for being overlapped script according to color
The fingerprint image in region 21 separates, and to zoom in and out and splice, obtains a complete fingerprint image.
Referring to Fig. 6, in the third embodiment, a kind of fingerprint sensor 300, structure is essentially identical with first embodiment,
The difference is that select video capture device 41, video capture device 41 without zoom and the depth of field it is short compared with video capture device 40, and
Filter 30, by the reflection of at least one second speculum 32, passes through the first light path to the first light path 10 between video capture device 41
10 reflect by the second speculums 32, make 10 length of the first light path, and adjust to identical as 11 length of the second light path, to
First area 20 is set with second area 21 to image in the fingerprint image size of video capture device 41 identical.
The present embodiment is because the first light path 10 and 11 length of the second light path are identical, therefore 41 field depth of video capture device is shorter,
Conducive to the video capture device 41 of selection small volume.
By the second speculum 32, the image of the first area 20 and second area 21 that are imaged in video capture device 41 is not
It can be overlapped and (please refer to Fig. 7), whereby, the finger for the first area 20 and second area 21 that image processing software splicing captures
Print image, to obtain a complete fingerprint image.
It further illustrates, the first area 20 and the fingerprint image of second area 21 being imaged in video capture device 41 will not weigh
Folded reason has been the position change that the first light path 10 have passed through that the second speculum 32 is put, and the first light path 10 enters image capture
The angle of device 41, and then the light path for making the first light path 10 and the second light path 11 enter video capture device 41 will not be overlapped in same position
It sets.
Show that two secondary reflections are passed through in reflection of first light path 10 by two the second speculums 32, the first light path 10 in Fig. 6
Be conducive to control light path angle, keep the angle that video capture device 41 is arranged more flexible, by the reflection of two the second speculums 32,
Video capture device 41 can be located between the spatial altitude that filter 30 and the first speculum 31 occupy in fingerprint sensor, make fingerprint
Sensor is thinner.
Compare the video capture device 4,40 and 41 in the first embodiment to 3rd embodiment, video capture device 4 is profit
11 focal length of 10 focal length of the first light path and the second light path is corresponded to respectively with the mode of zoom, is imaged out two images, the image
The depth of field of acquisition device 40 contains the gap of 11 length of the first light path 10 and the second light path, is not necessary to zoom, only need to be imaged a figure
Picture, the video capture device 41 is since the first light path 10 and 11 length of the second light path of 3rd embodiment are identical, video capture device
41 field depth can be short compared with video capture device 40, is also not necessary to zoom, therefore the volume of video capture device 41 is compared with image capture
Device 40 is small, also need to only be imaged an image.
Referring to Fig. 8, in the fourth embodiment, a kind of fingerprint sensor 400, structure is essentially identical with 3rd embodiment,
The difference is that filter 30 is selected as polarization spectro filter, the first light path 10 is in filter 30 between video capture device 41
Light path passes through a polarization rotating joint 33 (Polarizationrotator), to change polarization direction, 41 front of video capture device
One polarization optical selector 34 of setting, first light source 1 need to involve the ingredient of P waves with S.
It further illustrates, filter 30 is selected as S wave reflections and P waves penetrate, and polarization rotating joint 33 is attached at the second speculum
On 32, polarization optical selector 34 is selected as P waves and penetrates that S waves absorb or P waves penetrate S wave reflections, all to enter video capture device
For 41 light by polarization optical selector 34, the first light path 10 of first area 20 goes out S waves by 30 back reflection of filter, and second
Second light path 11 in region 21 becomes P waves after penetrating filter 30, and the second light path 11 can be penetrated by polarization optical selector 34, the
One light path 10 can penetrate polarization optical selector 34 after so that S waves is changed into P waves after polarization rotating joint 33, whereby the firstth area
Domain 20 images in video capture device 41 with second area 21, and image processing software splices the first area 20 and second captured
The fingerprint image in region 21, to obtain a complete fingerprint image.
It further illustrates, please refers to Fig. 9 A, the first light path 10 and the second light path 11 can be in the form of P waves (double-head arrow pattern)
It penetrates polarization optical selector 34 and enters video capture device 41, still, in addition to the first light path 10 and the second light path 11 can enter image
Acquisition device 41, in addition, please refer to Fig. 9 B, the image light source that filter 30 is reflected some because reflection angle relationship without
Second speculum 32 but directly reflexing to 41 direction of video capture device keeps light path too short, generate noise image light source, noise pattern
As being S waves (concentric circles) before light source to video capture device 41, therefore can be filtered out by polarization optical selector 34, and, the
One speculum 31 image light source of some can reflex on the second speculum 32 and not be direct imaging at video capture device
41 keep light path long, generate noise image light source, P waves are presented when passing through filter 30 in this light path, after polarization rotating joint 33
S waves are changed into, therefore can be filtered out by polarization optical selector 34, so, it, can by polarization spectro and the principle of polarization direction
To prevent noise image light source from interfering, image quality is promoted.
Referring to Fig. 10, in the 5th embodiment, a kind of fingerprint sensor 500, structure is essentially identical with first embodiment,
The difference is that first light source 1 is by an at least second light source 12 and at least a third light source 13 replaces, second light source 12 irradiates
First area 20, third light source 13 irradiate the color difference of second area 21, second light source 12 and third light source 13, the present embodiment
Video capture device 40 is selected, video capture device 40 is made to be imaged out the fingerprint image of different colours.
Filter 30 can be selected as part luminous intensity reflective portion luminous intensity and penetrate filter, polarization spectro filter or two colors
Filter, it should be noted that if filter is two color filters, second light source 12 must include the ingredient that can be reflected by two color filters, the
Three light source 13 must include the ingredient that can penetrate two color filters.
Specifically, second light source 12 and third light source 13 can select green light and blue light, the light splitting of 30 selector of filter respectively
Intensity reflection part luminous intensity penetrates filter, and first area 20 images in the fingerprint of video capture device 40 with second area 21 whereby
Image green and blue will be presented respectively, allow image processing software by identifying color to accelerate the processing speed of splicing.
Image processing software can separate the fingerprint image of the first area 20 of script overlapping and second area 21 according to color, with
It zooms in and out and splices, obtain a complete fingerprint image.
1 is please referred to Fig.1, in the sixth embodiment, a kind of fingerprint sensor 600, structure and the 5th embodiment are essentially identical,
The difference is that selecting video capture device 41, filter 30 to the first light path 10 between video capture device 41 is anti-by second
The reflection for penetrating mirror 32 makes first area 20 and second area 21 image in the fingerprint image size of video capture device 41 identical, and
Two light sources 12 and third light source 13 make video capture device 41 be imaged out the fingerprint images of different colours respectively.
Video capture device 41 can capture the fingerprint image to 21 different colours of first area 20 and second area, and
The first area 20 being imaged in video capture device 41 and the image of second area 21 will not be overlapped (please referring to Fig. 7), whereby, image
The fingerprint image for the first area 20 and second area 21 that processing software splicing captures, to obtain a complete fingerprint image
Picture, and the fingerprint image by being imaged out different colours can prevent noise image light source from interfering, and promote image quality.
2 are please referred to Fig.1, in the seventh embodiment, in order to increase the live body identification capability of fingerprint sensor 700, a kind of finger
Line sensor 700, structure can be selected as first embodiment one of to sixth embodiment, be arranged around 2 top surface of lens to
Few one the 4th light source 14, the 4th light source 14 can illuminate finger, record a video for video capture device 41, when being flowed in finger because of blood
The intensity of light source reflected can change, and video capture device 41 can obtain body of light product variable signal (PPG) whereby, to recognize life
Sign, therefore under existing structure, can realize live body discriminating function by the way that the 4th light source 14 is arranged, improve fingerprint biography
The identification capability of sensor 700.
3 are please referred to Fig.1, in the eighth embodiment, in order to increase the live body identification capability of fingerprint sensor 800, a kind of finger
Line sensor 800, structure can be selected as first embodiment one of to sixth embodiment, 2 lower section setting at least one of lens
Near-infrared light source 15 so that 800 ~ 850nm wave bands of the blood reflection near-infrared light source 15 in finger vena, near-infrared light source 15
The vein for illuminating finger is recorded a video for video capture device 41, observes the variation of blood in finger vena whereby, to recognize sign of life,
Therefore under existing structure, it can realize vein image discriminating function by the way that near-infrared light source 15 is arranged, improve fingerprint
The identification capability of sensor 800.
4 are please referred to Fig.1, in the 9th embodiment, a kind of fingerprint sensor 900, structure can be basic with fourth embodiment
Identical, first light source 1 is replaced by infrared light 16, and infrared light 16 is set to 2 lower section of lens, and video capture device is infrared light video camera
42, infrared light 16 is carried out at the same time total reflection and penetrates 2 top surface of lens after penetrating to lens 2 exposes to finger, makes 2 bottom of lens
Fingerprint image is generated on face, infrared light video camera 42 can be imaged the image, fingerprint pattern and hand of finger through this embodiment
Institutional framework case in finger.
It further illustrates, please refers to Fig.1 5, part is partly worn in 2 inner total reflection of lens after infrared light 16 exposes to lens 2
Saturating 2 top surface of lens exposes to finger, and when finger is pressed in 2 top surface of lens, video capture device 42 is in addition to being imaged script fingerprint crest portion
Outside point reflected infrared light 16, also can imaging radiation to the infrared light 16 of finger, be used for being imaged the interior tissue of finger whereby,
Such as blood vessel, therefore this method can observe the overall picture of finger.
Compared with prior art, the lens 2 of the component selection plane of fingerprint pressing replace prism, prism in the prior art
On need to be provided with plane of refraction with refraction image light source, prism ontology is projected after so that prism internal light source is reflected by plane of refraction again,
Middle plane of refraction size receives the limitation of image size, and the height of plane of refraction receives the limitation of refraction angle, therefore plane of refraction
Limit the base altitude of prism, however the plane of refraction list of planar lens 2 only has horizontal surface and bottom surface, therefore lens 2
Thickness can be designed thinner.
The present invention selection correspond to respectively 2 bottom surface of a lens part filter 30 and the first speculum 31 replace it is existing single
Speculum, the single mirror of the prior art is because that need to be imaged whole image therefore size is restricted, however filter 30 and first
A part of the speculum 31 because need to only distinguish imaged fingerprint, therefore size can reduce, and further illustrate, if speculum is bigger,
The spatial altitude occupied when putting at an angle is higher, therefore relatively simple speculum, filter 30 and the first speculum 31
Shared spatial altitude is thinner than existing single mirror.
And by the characteristic of filter 30, the reflected light path of the first speculum 31 is made not stopped by filter 30, and then makes the
One region, 20 image and 21 image of second area image on same video capture device, since the present invention is to the group of reflected light path
Part is less and the low cost of lens 2, and fingerprint sensor structure can be made simplified and cost reduces.
The identification of the fingerprint sensor of the present invention is high, and by the structure, effectively fingerprint sensor is made to reach thickness
6.5mm requirements below are broken through, are suitably applied on the electronic product of slimming.
The foregoing is merely presently preferred embodiments of the present invention, and therefore, it does not limit the scope of the claims of the present invention, therefore transport such as
With the equivalent structure variation carried out by description of the invention and accompanying drawing content, similarly it is included in the range of this invention, conjunction is given
Chen Ming.
Claims (11)
1. a kind of fingerprint sensor, it is characterised in that:Including:One lens, top surface and bottom surface are plane, and at least one is formed on lens
First area and a second area;One filter is set to lens base, and filter corresponds to the first area of lens, to reflect
The fingerprint image of first area;One first speculum is set to lens base, and the first speculum corresponds to the second area of lens,
To reflect the fingerprint image of second area;And a video capture device, to receive filter and the first speculum reflected
The fingerprint image of first area and second area, filter are set to the first speculum between the light path of video capture device, and
The fingerprint image in one region reflexes to video capture device via filter, and the fingerprint image of second area is reflected via the first speculum
It penetrates filter again afterwards, is received later by video capture device;An at least first light source receives fingerprint image to provide video capture device
As when required light source.
2. fingerprint sensor according to claim 1, it is characterised in that:The filter is to the light path between video capture device
By the reflection of at least one second speculum.
3. fingerprint sensor according to claim 2, it is characterised in that:The filter is polarization spectro filter, the shadow
As one polarization optical selector of setting in front of acquisition device, the light path of first area to video capture device is the first light path, described first
Light path passes through a polarization rotating joint in filter to the light path between video capture device.
4. fingerprint sensor according to claim 1, it is characterised in that:The filter is that polarization spectro filter or two colors are filtered
Mirror or part luminous intensity reflective portion luminous intensity penetrate filter.
5. fingerprint sensor according to claim 1, it is characterised in that:The video capture device is zoomed image acquisition device
Or auto-focusing video capture device.
6. fingerprint sensor according to claim 1, it is characterised in that:The first light source by an at least second light source and
An at least third light source replaces, and second light source irradiates first area, and third light source irradiates second area, second light source and third light
The color in source is different.
7. fingerprint sensor according to claim 1, it is characterised in that:The first light source is replaced by infrared light, infrared
Light is set to below lens, and video capture device is infrared light video camera.
8. fingerprint sensor according to claim 1, it is characterised in that:At least one the 4th is arranged around the lens top surface
Light source.
9. fingerprint sensor according to claim 1, it is characterised in that:An at least near infrared light is set below the lens
Source.
10. fingerprint sensor according to claim 1, it is characterised in that:The first light source is arranged in the side of lens,
The light of first light source enters lens by the side of lens.
11. fingerprint sensor according to claim 1, it is characterised in that:The fingerprint image of the first area and second
The fingerprint image characteristic area having the same in region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510035933.9A CN105320926B (en) | 2014-06-09 | 2015-01-23 | Fingerprint sensor |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2014102525131 | 2014-06-09 | ||
| CN201410252513 | 2014-06-09 | ||
| CN201510035933.9A CN105320926B (en) | 2014-06-09 | 2015-01-23 | Fingerprint sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105320926A CN105320926A (en) | 2016-02-10 |
| CN105320926B true CN105320926B (en) | 2018-09-14 |
Family
ID=55248287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510035933.9A Active CN105320926B (en) | 2014-06-09 | 2015-01-23 | Fingerprint sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105320926B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10664676B2 (en) * | 2017-06-12 | 2020-05-26 | Will Semiconductor (Shanghai) Co. Ltd. | Systems and methods for reducing unwanted reflections in display systems incorporating an under display biometric sensor |
| CN110175494A (en) * | 2018-07-06 | 2019-08-27 | 神盾股份有限公司 | Optical finger print sensing device |
| CN111182227A (en) * | 2018-11-13 | 2020-05-19 | 上海耕岩智能科技有限公司 | Topological structure light source driving method applied to under-screen image imaging, storage medium and electronic equipment |
| CN109886177B (en) * | 2019-02-14 | 2021-08-24 | Oppo广东移动通信有限公司 | Display screen module, electronic equipment and fingerprint image processing method |
| CN110348414B (en) * | 2019-07-17 | 2021-07-13 | 广州国显科技有限公司 | Fingerprint identification device, display panel, display device and fingerprint identification method |
| TWM611909U (en) * | 2020-09-29 | 2021-05-11 | 神盾股份有限公司 | Optical sensor device for sensing finger biometrics features and electronic device using the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101995999A (en) * | 2009-08-20 | 2011-03-30 | 瑞鼎科技股份有限公司 | Optical touch device |
| CN201828933U (en) * | 2010-11-22 | 2011-05-11 | 深圳百佳安生物识别技术有限公司 | Optical fingerprint collection instrument |
| CN102651065A (en) * | 2012-03-31 | 2012-08-29 | 杭州东研科技有限公司 | Optical fingerprint collection device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5633054B2 (en) * | 2010-10-29 | 2014-12-03 | 株式会社オプトロジック | Imaging device |
-
2015
- 2015-01-23 CN CN201510035933.9A patent/CN105320926B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101995999A (en) * | 2009-08-20 | 2011-03-30 | 瑞鼎科技股份有限公司 | Optical touch device |
| CN201828933U (en) * | 2010-11-22 | 2011-05-11 | 深圳百佳安生物识别技术有限公司 | Optical fingerprint collection instrument |
| CN102651065A (en) * | 2012-03-31 | 2012-08-29 | 杭州东研科技有限公司 | Optical fingerprint collection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105320926A (en) | 2016-02-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105320926B (en) | Fingerprint sensor | |
| TWI534717B (en) | Fingerprint sensor | |
| US10311298B2 (en) | Biometric camera | |
| JP6260006B2 (en) | IMAGING DEVICE, IMAGING SYSTEM USING THE SAME, ELECTRONIC MIRROR SYSTEM, AND RANGING DEVICE | |
| CN104182727B (en) | Ultra-thin fingerprint and palm print acquisition device and fingerprint and palm print image acquisition method | |
| JP6517499B2 (en) | Imaging system | |
| CN208143330U (en) | Camera model and portable electronic devices | |
| WO2015029537A1 (en) | Organ imaging apparatus | |
| TWI601074B (en) | Certification devices and certification prism body | |
| JP5067885B2 (en) | Image input device and personal authentication device | |
| CN101526993A (en) | An imaging apparatus for recognizing users | |
| KR20160033691A (en) | Multiple mode image acquisition for iris imaging | |
| CN112668540B (en) | Biological characteristic acquisition and recognition system and method, terminal equipment and storage medium | |
| KR20160050755A (en) | Electronic Device and Method for Recognizing Iris by the same | |
| CN111095284A (en) | Fingerprint detection device and method and electronic equipment | |
| CN108241830A (en) | Biometric recognition device.It | |
| US9619690B2 (en) | Authentication apparatus, prism member for authentication and authentication method | |
| CN110214328B (en) | Fingerprint identification method and device and electronic equipment | |
| CN104221050B (en) | Authentication device, prism element and authentication method for certification | |
| CN106934349A (en) | Dual camera is imaged and iris capturing identification integration apparatus | |
| JPWO2015119078A1 (en) | Biometric authentication device and biometric authentication method using finger authentication prism | |
| WO2018142692A1 (en) | Imaging device and image processing apparatus | |
| CN103632135B (en) | A kind of iris image trap setting based on double image sensor | |
| EP4276682A1 (en) | Biometric acquisition and recognition system and method, and terminal device | |
| CN213844157U (en) | Biological characteristic acquisition and identification system and terminal equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |