CN108241834A - Biometric recognition device.It - Google Patents
Biometric recognition device.It Download PDFInfo
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- CN108241834A CN108241834A CN201611208441.6A CN201611208441A CN108241834A CN 108241834 A CN108241834 A CN 108241834A CN 201611208441 A CN201611208441 A CN 201611208441A CN 108241834 A CN108241834 A CN 108241834A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
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Abstract
The present invention provides a kind of biometric recognition device.It, including light source, leaded light component, image-pickup assembly and first collimator.Light source is adapted to provide for light beam.Leaded light component is located on the transmission path of light beam.Image-pickup assembly is located at below leaded light component and with multiple pixel regions.First collimator is between leaded light component and image-pickup assembly and including the first collimator assembly and the second collimator assembly.First collimator assembly includes the first light-transmitting component, the first light-absorption layer and multiple lens subassemblies.The configuration of first light-absorption layer is on the first light-transmitting component and with multiple first openings for being overlapped in pixel region.Lens subassembly configuration is on the first light-transmitting component and in the first opening.The light absorbing element of second collimator assembly and the first opening are located at the opposite side of the first light-transmitting component respectively, and light absorbing element has multiple second openings for being overlapped in the first opening.The biometric recognition device.It of the present invention can have good identification capability.
Description
Technical field
The present invention relates to a kind of biometric recognition device.Its.
Background technology
The type of biological characteristic identification includes face, sound, iris, retina, vein, fingerprint and palmmprint identification etc..By
It is unique in everyone fingerprint, and fingerprint is not easy to change with age or physical condition, therefore fingerprint
Device for identifying has become a kind of current most popular biometric recognition device.It.According to the difference of sensing mode, identification of fingerprint dress
Optical profile type and condenser type can be divided by putting.Capacitance type fingerprint device for identifying be assembled in electronic product (such as：Mobile phone, tablet computer)
When, capacitance type fingerprint device for identifying top is equipped with protection component (cover lens) more.In general, need additional processing (such as
Drilling or thinning) protection component, so that capacitance type fingerprint device for identifying can sense when the capacitance or electricity caused by finger touching
Field variation.
Compared to capacitance type fingerprint device for identifying, optical fingerprint device for identifying acquisition penetrate readily through protection component light into
Row identification of fingerprint, and additional processing can not had to and protect component, thus and the combination of electronic product on it is more convenient.
Optical fingerprint device for identifying generally includes light source, image-pickup assembly and light-transmitting component.Light source is sending out light
Beam, the finger being pressed on irradiation on light-transmitting component.The fingerprint of finger is made of a plurality of irregular burr with dimpled grain.Quilt
Burr and the light beam of dimpled grain reflection can be formed as the fingermark image that light and shade is interlocked on the receiving plane of image-pickup assembly.Image is picked
It takes component that fingermark image can be converted to corresponding image information, and image information is input to processing unit.Processing unit can
The image information corresponding to fingerprint is calculated using algorithm, to carry out the identity identification of user.However, in above-mentioned capture process
In, image-pickup assembly is easily dispersedly transferred to by the light beam that fingerprint reflects, and cause capture quality bad, influence identification knot
Fruit.
Invention content
The present invention provides a kind of biometric recognition device.It.
According to an embodiment of the invention, biometric recognition device.It include light source, leaded light component, image-pickup assembly and
First collimator.Light source is adapted to provide for light beam.Leaded light component is located on the transmission path of light beam.Image-pickup assembly is located at leaded light
Below component and with multiple pixel regions.First collimator is between leaded light component and image-pickup assembly, wherein first is accurate
Straight device includes the first collimator assembly and the second collimator assembly.First collimator assembly includes the first light-transmitting component, the first light-absorption layer
And multiple lens subassemblies.The configuration of first light-absorption layer is opened on the first light-transmitting component and with being overlapped in multiple the first of pixel region
Mouthful.Lens subassembly configuration is on the first light-transmitting component and is located in one of respectively in the first opening.Second collimator assembly includes
Light absorbing element.Light absorbing element and first opening respectively be located at the first light-transmitting component opposite side, and light absorbing element have be overlapped in
Multiple second openings of first opening.
In biometric recognition device.It according to an embodiment of the invention, leaded light component has light out part and is connected to
The light in part of light out part.Light source is co-located at image-pickup assembly below light out part.Light in part be located at light source and light out part it
Between.
In biometric recognition device.It according to an embodiment of the invention, leaded light component is towards the surface of first collimator
It is formed with multiple micro-structures.Surface is protruded or be recessed in micro-structure.
In biometric recognition device.It according to an embodiment of the invention, the aperture of each first opening and the first light transmission group
The height ratio of part is fallen in the range of 2 to 20.
In biometric recognition device.It according to an embodiment of the invention, light absorbing element is the second light-absorption layer.Second inhales
Photosphere is between the first light-transmitting component and image-pickup assembly, and the second opening is formed in the second light-absorption layer.Each second opens
The aperture of mouth is fallen with the height ratio of the first light-transmitting component in the range of 2 to 20.
In biometric recognition device.It according to an embodiment of the invention, the aperture of the second opening is less than or equal to first
The aperture of opening.
In biometric recognition device.It according to an embodiment of the invention, the second collimator assembly further includes the second light transmission group
Part and third light-absorption layer.Second light-transmitting component between the second light-absorption layer and image-pickup assembly, and third light-absorption layer with
Second light-absorption layer is located at the opposite side of the second light-transmitting component respectively.Third light-absorption layer has the multiple thirds for being overlapped in the second opening
Opening.
In biometric recognition device.It according to an embodiment of the invention, the aperture of the first opening is greater than or equal to second
The aperture of opening, and the aperture of the second opening is greater than or equal to the aperture of third opening.
In biometric recognition device.It according to an embodiment of the invention, the second collimator assembly further includes multiple second thoroughly
Optical assembly.Second light-transmitting component is configured in the second opening, wherein the refractive index of the second light-transmitting component respectively falls in 1.3 to 1.7
In the range of, and the aperture of each second opening and the height ratio of the second light-transmitting component are fallen in the range of 2 to 20.
In biometric recognition device.It according to an embodiment of the invention, biometric recognition device.It further includes the second standard
Straight device.Second collimator is between leaded light component and first collimator.Second collimator includes multiple prisms.The apex angle of prism
It is respectively directed to the leaded light component.
Based on above-mentioned, in the biometric recognition device.It of the embodiment of the present invention, the first collimator assembly and are utilized
Two collimator assemblies will be transmitted to the beam collimation of image-pickup assembly, make the capture increased quality of image-pickup assembly.Therefore,
Biometric recognition device.It can have good identification capability.
Description of the drawings
Comprising attached drawing to further understand the present invention, and attached drawing is incorporated in this specification and forms one of this specification
Point.Illustrate the embodiment of the present invention, and principle for explaining the present invention together with the description.
Fig. 1 is the diagrammatic cross-section of the biometric recognition device.It of one embodiment of the invention；
Fig. 2 is a kind of enlarged drawing of leaded light component in Fig. 1；
Fig. 3 is a kind of schematic diagram of the first collimator assembly of first collimator in Fig. 1；
Fig. 4 is the first diagrammatic cross-section of first collimator, image-pickup assembly and circuit board in Fig. 1；
Fig. 5 is leaded light component and a kind of enlarged drawing of the second collimator in Fig. 1；
Fig. 6 is the diagrammatic cross-section of the biometric recognition device.It of another embodiment of the present invention；
Fig. 7 to Fig. 9 is respectively second to of first collimator in Fig. 1 and Fig. 6, image-pickup assembly and circuit board
Four kinds of diagrammatic cross-sections；
Figure 10 is a kind of elevational schematic view of the first collimator assembly of first collimator in Fig. 9.
Symbol description：
10：Object to be identified；
100、100A：Biometric recognition device.It；
110：Light source；
112：Luminescence component；
120、120A：Leaded light component；
122：Light out part；
124：Light in part；
130：Image-pickup assembly；
132：Charged Coupled Device；
140、140A、140B、140C：First collimator；
142、142C：First collimator assembly；
144、144A、144B、144C：Second collimator assembly；
150：Circuit board；
160：Cover board；
170：Second collimator；
172：Prism；
1421：First light-transmitting component；
1422：First light-absorption layer；
1423：Lens subassembly；
1441：Light absorbing element；
1442：Second light-transmitting component；
1443：Third light-absorption layer；
B、B’、B1’、B2’：Light beam；
BA：Base angle；
C：Recess；
H1、H2：Highly；
M：Micro-structure；
O1：First opening；
O2：Second opening；
O3：Third is open；
PR：Pixel region；
S、S’、S1421A、S1421B、S1442A、S1442B：Surface；
S1：First reflecting surface；
S2：Second reflecting surface；
S1442：Upper surface；
S1421C、S1442C：Side wall surface；
TA：Apex angle；
W1442：Width；
WO1、WO2、WO3：Aperture.
Specific embodiment
With detailed reference to the exemplary embodiment of the present invention, the example of exemplary embodiment is illustrated in attached drawing.Only
It is possible that same components symbol is used for representing same or similar part in the accompanying drawings and the description.
Fig. 1 is the diagrammatic cross-section of the biometric recognition device.It of one embodiment of the invention.Please refer to Fig. 1, biological characteristic
Device for identifying 100 is, for example, fingeprint distinguisher, and to recognize the fingerprint of object 10 to be identified, but not limited to this.In another reality
Apply in example, biometric recognition device.It 100 also can be used to identification vein, palmmprint or fingerprint, vein and palmmprint wherein extremely
Combination two few.
It is accurate that biometric recognition device.It 100 includes light source 110, leaded light component 120, image-pickup assembly 130 and first
Straight device 140.
Light source 110 is adapted to provide for light beam B.Light source 110 can be non-visible light sources or visible light source.That is,
Light beam B can be black light (such as：Infrared light) or visible ray (such as：Feux rouges, blue and green light or combination).Alternatively, light
Source 110 can be the combination of non-visible light sources and visible light source.For example, light source 110 may include multiple luminescence components
112.Luminescence component 112 can be light emitting diode or the luminescence component of other appropriate types.Fig. 1 schematically shows that two shine
Component 112, and two luminescence components 112 are in the opposite side of image-pickup assembly 130.However, the quantity of luminescence component 112 with
And configuration mode can change on demand, and be not limited.
Leaded light component 120 is located on the transmission path of light beam B, and it is to be identified to be suitable for the light beam B for providing light source 110 guiding
Object 10.For example, the material of leaded light component 110 can be glass, makrolon (PC), polymethyl methacrylate (PMMA) or
Other suitable materials.In the present embodiment, light source 110 is located at the same side of leaded light component 120 with image-pickup assembly 130.It is raw
Object feature identification device 100 further comprises circuit board 150.Light source 110 be configured on circuit board 150 and with the electricity of circuit board 150
Connection.Leaded light component 120 has light out part 122 and is connected to an at least light in part 124 for light out part 122.Light source 110 and shadow
As acquisition component 130 is co-located at 122 lower section of light out part, and light source 110 is located at by image-pickup assembly 130.Light in part 124
Between light source 110 and light out part 122.Specifically, light in part 124 can be fixed on circuit board 150, and light in part 124 has
There is recess C.Recess C crosses the space for accommodating light source 110 with circuit board 150.In another embodiment, light in part 124 and circuit
The wherein at least one of plate 150 can have recess (not shown), to accommodate light source 110.In another embodiment, light in part 124
With circuit board 150 can by fixed mechanism (not shown) or adhesion layer (be not shown, such as：Optical cement) it is fixed together.Again
In one embodiment, light in part 124 can by adhesion layer (be not shown, such as：Optical cement) and be fixed on light source 110, and enter light
Portion 124 can not be contacted with circuit board 150.Fig. 1 schematically shows two light in part 124, and two light in part 124 are in light extraction
The opposite side in portion 122.However, the quantity and configuration mode of light in part 124 can change on demand, and it is not limited.
Fig. 2 is a kind of enlarged drawing of leaded light component in Fig. 1.Fig. 1 and Fig. 2 is please referred to, the light beam B that light source 110 projects enters certainly
Light portion 124 enters leaded light component 120, and light beam B can be transferred to light out part 122 via light in part 124.Leaded light component 120 towards
The surface S of first collimator 140 can be selectively formed multiple micro-structure M (Fig. 1 is not shown, and please refers to Fig. 2).Micro-structure M
Suitable for changing the direction of transfer of light beam B so that vertically or close to ground direct projection of hanging down go out light out part by the light beam B of micro-structure M reflection
122.As shown in Fig. 2, micro-structure M can protrude from surface S and can have the first reflecting surface S1 and the second reflecting surface S2.First is anti-
Face S1 and the second reflecting surface S2 is penetrated to be connected with each other, wherein the first reflecting surface S1 and the second reflecting surface S2 is tilted relative to surface S, and
First reflecting surface S1 is opposite with the inclined direction of the second reflecting surface S2.In one embodiment, micro-structure M, light out part 122 and enter
Light portion 124 can be integrally formed, and but not limited to this.In another embodiment, micro-structure M, light out part 122 and light in part 124
Can make respectively, then by bindiny mechanism or adhesion layer (such as：Optical cement) it is fixed together.Alternatively, micro-structure M also can be recessed
In surface S.Specifically, micro-structure M can be formed in the recess on the S of surface.In addition, the quantity of micro-structure M and its distribution can
Change according to different demands, and be not limited to the quantity shown by Fig. 2 and distribution.
The surface S ' of 122 output beam B of light out part is opposite with the surface S for being formed with micro-structure M.In one embodiment, table
Face S ' can be the press surface for object 10 to be identified pressing.In the case where surface S ' is the framework of press surface, as shown in Fig. 2, from light
The light beam B in source 110 is sequentially by light in part 124 and light out part 122, and in surface S ' experiences total internal reflections (Total
Internal Reflection, TIR), then sequentially reflected by the second reflecting surface S2 and the first reflecting surface S1, and it is vertical or
Close to vertically injection surface S '.
Alternatively, as shown in Figure 1, biometric recognition device.It 100 can further comprise cover board 160 for object 10 to be identified by
Pressure.Cover board 160 is located at 120 top of leaded light component, and leaded light component 120 is between cover board 160 and first collimator 140.Lid
Plate 160 can be the electronic product to be assembled (such as：Touch panel or touch-control display panel) protection component (cover
Lens), but not limited to this.In one embodiment, cover board 160 can be by bindiny mechanism or adhesion layer (example with leaded light component 120
Such as：Optical cement) and be fixed together, but not limited to this.In the case of cover board 160 and leaded light component 120 being fixed with adhesion layer,
The refractive index of adhesion layer, cover board 160 and leaded light component 120 can be same or similar, and to reduce interface reflection, and then it is special to promote biology
Levy the light utilization ratio of device for identifying 100 and/or capture quality.However, in other embodiments, adhesion layer, cover board 160 are with leading
The refractive index of optical assembly 120 also can be different.Under the framework of setting cover board 160, the light beam B from light source 110 is sequentially by entering
124 light out part 122 of light portion and cover board 160, and in cover board 160 for the surface experiences total internal reflection of object 10 to be identified pressing.Through
Object 10 to be identified act on (such as：Diffusion) light beam B ' sequentially by cover board 160 and light out part 122 and be transferred to surface S.It passes
Being handed to a part of the light beam B ' of surface S can be reflected by surface S, and again towards cover board 160 for the surface of object 10 to be identified pressing
It transmits.On the other hand, leaded light component 120 can be projected from surface S by being transferred to another part of the light beam B ' of surface S.
Image-pickup assembly 130 is located at 120 lower section of leaded light component and with the multiple pixel for example arranged in array
(pixel) area PR (being shown in Fig. 4) to receive the light beam B ' acted on through object 10 to be identified, and then obtains the shadow of object 10 to be identified
Picture.In the present embodiment, image-pickup assembly 130 is for example including multiple Charged Coupled Device (Charge-Coupled
Device, CCD) 132 (being shown in Fig. 4).Charged Coupled Device 132 is configured on circuit board 150 and is electrically connected with circuit board 150
It connects.The region of Charged Coupled Device 132 is the pixel region PR of image-pickup assembly 130.In another embodiment, image is picked
Component 130 is taken to may include multiple complementary metal oxide semiconductors (Complementary Metal Oxide
Semiconductor, CMOS), and the pixel region that the region of complementary metal oxide semiconductor is image-pickup assembly 130
PR。
First collimator 140 is between leaded light component 120 and image-pickup assembly 130, and first collimator 140 is located at
On the transmission path of light beam B ' after the effect of object 10 to be identified.For example, first collimator 140 is configurable on image capture group
On part 130, and first collimator 140 and image-pickup assembly 130 can by bindiny mechanism or adhesion layer (such as：Optical cement) and
It is fixed together, but not limited to this.
Fig. 3 is a kind of schematic diagram of the first collimator assembly of first collimator in Fig. 1, shows the front of the first collimator assembly
And the back side.Fig. 4 is the first diagrammatic cross-section of first collimator, image-pickup assembly and circuit board in Fig. 1.Please refer to figure
1st, Fig. 3 and Fig. 4, first collimator 140 include the first collimator assembly 142 and are overlapped in the second standard of the first collimator assembly 142
Straight component 144.
First collimator assembly 142 includes the first light-transmitting component 1421, the first light-absorption layer 1422 and multiple lens subassemblies
1423.The material of first light-transmitting component 1421 can be glass, makrolon (PC), polymethyl methacrylate (PMMA) or other
Suitable material.First light-absorption layer 1422, which is configured on the first light-transmitting component 1421 and has, is overlapped in multiple the first of pixel region PR
Be open O1.Lens subassembly 1423 is configured on the first light-transmitting component 1421 and is located in one of respectively in the first opening O1.The
Two collimator assemblies 144 include light absorbing element 1441.Light absorbing element 1441 and first is open O1 respectively positioned at the first light-transmitting component
1421 opposite side, and light absorbing element 1441 has the multiple second opening O2 for being overlapped in the first opening O1.
In the present embodiment, the first light-absorption layer 1422 is configured on the surface S1421A of the first light-transmitting component 1421.Extinction
Component 1441 is the second light-absorption layer.Second light-absorption layer (i.e. light absorbing element 1441) is positioned at the first light-transmitting component 1421 and image capture
Between component 130, and the second light-absorption layer example such as disposed in the first light-transmitting component 1421 towards the surface of image-pickup assembly 130
On S1421B, and the second opening O2 is formed in the second light-absorption layer.Wherein the one of first light-absorption layer 1422 and the second light-absorption layer
It is a to can be further configured on the side wall surface S1421C of the first light-transmitting component 1421, to avoid the first light-transmitting component 1421 is transmitted to
In light beam from side wall surface S1421C project, but not limited to this.In another embodiment, the first light-absorption layer 1422 and second
Light-absorption layer can not be configured on the side wall surface S1421C of the first light-transmitting component 1421.
The lens subassembly 1423 of the incident side of first collimator 140 is set to act on and lead to through object 10 to be identified suitable for convergence
The light beam B ' of leaded light component 120 is crossed, and helps to allow more light beams B ' that image-pickup assembly 130 can be transferred to.
The material of first light-absorption layer 1422 and the second light-absorption layer (i.e. light absorbing element 1441) for example can be used containing extinction
Material (such as：Carbon) silica gel system, acryl system or photoresist, to absorb the light of the first light-transmitting component of large angle incidence 1421
Beam.In addition, even if the light beam (such as light beam B ' shown by Fig. 4) of the first light-transmitting component of large angle incidence 1421 is opened by first
Mouthful O1 and enter the first light-transmitting component 1421, still using between the first collimator assembly 142 and image-pickup assembly 130
Light absorbing element 1441 absorbs the incident beam of wide-angle, and only allow low-angle incident beam by and be transferred to image capture group
Part 130.First light-absorption layer 1422 and the second light-absorption layer can be used identical material and by the production process charts case shapes with along with
Into but not limited to this.In another embodiment, the first light-absorption layer 1422 and the second light-absorption layer can be used different materials and
It is formed in not people having a common goal's manufacture craft.
Into first collimator 140 light beam whether by the first light-absorption layer 1422 and the second light-absorption layer (i.e. light absorbing element
1441) height of the aperture WO1 that may depend on the first opening O1, the aperture WO2 of the second opening O2, the first light-transmitting component 1421 is absorbed
H1 and light beam B ' is spent at the refraction angle of the surface S1421A of the first light-transmitting component 1421 (by the incidence angle of light beam B ' and first
The refractive index of light-transmitting component 1421 determines) etc..In the case where the height H1 of the first light-transmitting component 1421 is definite value, the first opening
The aperture WO2 of the openings of the aperture WO1 of O1 and second O2 is bigger, the angle model for the light beam B ' that image-pickup assembly 130 receives
It encloses bigger.In the case where the aperture WO2 of the openings of aperture WO1 and second O2 of the first opening O1 is definite value, the first light transmission group
The height H1 of part 1421 is bigger, and the angular range of light beam B ' that image-pickup assembly 130 receives is smaller.The first opening O1's
In the case that the height H1 of aperture WO1, the aperture WO2 of the second opening O2 and the first light-transmitting component 1421 are definite value, light beam B '
Refraction angle it is bigger (namely incidence angle is bigger), more be possible to by the first light-absorption layer 1422 and the second light-absorption layer (i.e. extinction
Component 1441) it absorbs.In the present embodiment, the refractive index of the first light-transmitting component 1421 is more than 1, and for example falls 1.3 to 1.7
In the range of.The aperture WO1 of each first opening O1 and the height H1 ratios of the first light-transmitting component 1421 are fallen in the range of 2 to 20.Respectively
The aperture WO2 of second opening O2 and the height H1 ratios of the first light-transmitting component 1421 are fallen in the range of 2 to 20.However, first is saturating
The height H1 ratios and each the of the refractive index of optical assembly 1421, the aperture WO1 of each first opening O1 and the first light-transmitting component 1421
Aperture WO2 and the height H1 ratios of the first light-transmitting component 1421 of two opening O2 can according to different design requirement (such as：Image is picked
Take the pitch (pitch) of component 130) change, and be not limited to above-mentioned.
It is absorbed using the first light-absorption layer 1422 and the second light-absorption layer (i.e. light absorbing element 1441) and is acted on through object 10 to be identified
And it by the wide-angle light beam of leaded light component 120, can be transferred to the light beam (light beam of low-angle incidence) of only special angle
Image-pickup assembly 130.Be open the aperture WO2 of the openings of aperture WO1 and second O2 of O1 via appropriate modulation first, can be with
Enable the light beam by first collimator 140 with 0 degree or close to 0 degree of angle incidence image-pickup assembly 130.In other words
It says, first collimator 140 helps to will be transmitted to the beam collimation of image-pickup assembly 130.It is filtered out in this way, not only helping
Stray light additionally aids and avoids the problem that the light beam from difference the second opening O2 outputs interferes with each other, and makes image-pickup assembly 130
Capture increased quality.Therefore, biometric recognition device.It 100 can have good identification capability.
In the present embodiment, the aperture WO2 of the openings of aperture WO1 and second O2 of the first opening O1 can be identical, and first
The openings of opening O1 and second O2 is aligned in pixel region PR, so as to sequentially pass through the first opening O1 and the light beam energy of the second opening O2
Enough it is transferred to image-pickup assembly 130.First opening O1 and second opening O2 shape be, for example, circle, but not as
Limit.In other embodiments, the shape of the first opening O1 and the second opening O2 can also be triangle, quadrangle, pentagon
Or other polygons.In addition, the size of pixel region PR may be slightly larger than the hole of the openings of aperture WO1 and second O2 of the first opening O1
Diameter WO2, but not limited to this.
According to different demands, biometric recognition device.It 100 may also include other assemblies.For example, biological characteristic is distinguished
Identification device 100 may also include the second collimator 170.Second collimator 170 be located at leaded light component 120 and first collimator 140 it
Between, and the second collimator 170 is located on the transmission path of the light beam B ' after object 10 to be identified effect.For example, the second collimation
Device 170 is configurable on the S of surface, and 120 and second collimator 170 of leaded light component can by bindiny mechanism or adhesion layer (such as：
Optical cement) and be fixed together, but not limited to this.
Second collimator 170 is suitable for before light beam B ' is by first collimator 140 (or first collimator 140A), in advance
By light beam B ' collimationization, with the angle of divergence of converging beam B '.In this way, can increase light beam B ' subsequently through first collimator 140 (or
First collimator 140A) probability.Fig. 5 is leaded light component and a kind of enlarged drawing of the second collimator in Fig. 1.Please refer to Fig. 1
And Fig. 5, the second collimator 170 may include multiple prisms 172, and the apex angle TA of prism 172 is respectively directed to leaded light component 120.
In the present embodiment, the angle of two base angle BA of each prism 172 is identical.However, the apex angle TA and base angle BA of prism 172 can foundations
Different demands changes, and without being limited thereto.
Fig. 6 is the diagrammatic cross-section of the biometric recognition device.It of another embodiment of the present invention.The biological characteristic identification of Fig. 6
Device 100A is similar to the biometric recognition device.It 100 of Fig. 1, and biometric recognition device.It 100A have distinguished with biological characteristic
The effect of identification device 100 is similar and advantage are just no longer repeated in this.The biology of the biometric recognition device.It 100A and Fig. 1 of Fig. 6
The difference of feature identification device 100 is that the position of light source 110 is different.Specifically, in the embodiment in fig 6, light source 110
In the side of leaded light component 120A.Under this framework, leaded light component 120A is, for example, plate, and leaded light component 120A can be omitted
The light in part 124 of leaded light component 120 in Fig. 1.
Fig. 7 to Fig. 9 is respectively second to of first collimator in Fig. 1 and Fig. 6, image-pickup assembly and circuit board
Four kinds of diagrammatic cross-sections.Figure 10 is a kind of elevational schematic view of the first collimator assembly of first collimator in Fig. 9.
The first collimator 140A of Fig. 7 is similar to the first collimator 140 of Fig. 4, and first collimator 140A has and the
The effect of collimator 140 is similar and advantage are just no longer repeated in this.The first collimation of the first collimator 140A and Fig. 4 of Fig. 7
The difference of device 140 is as described below.In Fig. 4, the aperture WO2 of the second opening O2 is equal to the aperture WO1 of the first opening O1.In Fig. 7
In, the aperture WO2 of the second opening O2 is less than the aperture WO1 of the first opening O1.
Hole by the second opening O2 for reducing the second light-absorption layer (i.e. the light absorbing element 1441 of the second collimator assembly 144A)
Diameter WO2 contributes to the light beam for filtering out more stray lights or large angle incidence first collimator 140A, and then promotes biological characteristic
The identification capability of device for identifying.
The first collimator 140B of Fig. 8 is similar to the first collimator 140 of Fig. 4, and first collimator 140B has and the
The effect of collimator 140 is similar and advantage are just no longer repeated in this.The first collimation of the first collimator 140B and Fig. 4 of Fig. 8
The difference of device 140 is as described below.In fig. 8, the second collimator assembly 144B further includes the second light-transmitting component 1442 and third is inhaled
Photosphere 1443.Second light-transmitting component 1442 is between the second light-absorption layer (i.e. light absorbing element 1441) and image-pickup assembly 130.
In addition, 1443 and second light-absorption layer of third light-absorption layer is located at the opposite side of the second light-transmitting component 1442 respectively.
In the present embodiment, the first light-absorption layer 1422 and the second light-absorption layer (i.e. light absorbing element 1441) are arranged respectively at first
On the opposite surface S1421A and surface S1421B of light-transmitting component 1421, and third light-absorption layer 1443 is configured in the second light transmission group
Part 1442 is towards on the surface S1442A of image-pickup assembly 130.Second light-transmitting component 1442 by bindiny mechanism or can stick together
Layer (such as：Optical cement) and it is fixed on the first light-transmitting component 1421 is formed with the second light-absorption layer (i.e. light absorbing element 1441) one
Side, but not limited to this.In another embodiment, the second light-absorption layer (i.e. light absorbing element 1441) can divide with third light-absorption layer 1443
It is positioned respectively on the opposite surface S1442B and surface S1442A of the second light-transmitting component 1442, and the first light-transmitting component 1421 can
By bindiny mechanism or adhesion layer (such as：Optical cement) and be fixed on the second light-transmitting component 1442 and be formed with the one of the second light-absorption layer
Side.In another embodiment, the second light-absorption layer can be previously formed in third light-transmitting component (not shown), and third light-transmitting component
It can be fixed on by bindiny mechanism or adhesion layer between the first light-transmitting component 1421 and the second light-transmitting component 1442.Another real
It applies in example, third light-absorption layer 1443 can be further configured on the side wall surface S1442C of the second light-transmitting component 1442, but not with this
It is limited.
Third light-absorption layer 1443 has the multiple thirds opening O3 for being overlapped in the second opening O2.The aperture of first opening O1
WO1 can be greater than or equal to the aperture WO2 of the second opening O2, and the aperture WO2 of the second opening O2 can be greater than or equal to third and be open
The aperture WO3 of O3.In the present embodiment, the aperture WO1 of the first opening O1, the aperture WO2 of the second opening O2 and third opening
The aperture WO3 of O3 is identical.Furthermore, the first opening O1, the second opening O2 and third opening O3 have identical or substantive
Upper identical shape and size.So-called substantially the same shape and size allow for the mistake caused by manufacture craft
Difference.First opening O1, second opening O2 and third opening O3 shape can be circle, triangle, quadrangle, pentagon or
Other polygons.In addition, the first opening O1, the second opening O2 and third opening O3 are aligned in pixel region PR, so as to sequentially lead to
Image-pickup assembly 130 can be transferred to by crossing the light beam of the first opening O1, the second opening O2 and third opening O3.
The material of third light-absorption layer 1443 can be used it is same or similar in the first light-absorption layer 1422 and the second light-absorption layer (i.e.
Light absorbing element 1441) material, just no longer repeated in this.Second light-transmitting component 1442 and third light-absorption layer 1443 are provided with
Help the light beam for filtering out more stray lights or large angle incidence first collimator 140B, and then promote biometric recognition device.It
Identification capability.
In the present embodiment, the refractive index of the second light-transmitting component 1442 is more than 1, and for example falls the range 1.3 to 1.7
It is interior.The aperture WO3 of each third opening O3 and the height H2 ratios of the second light-transmitting component 1442 are fallen in the range of 2 to 20.However, the
The height H2 ratios of the aperture WO3 and the second light-transmitting component 1442 of the refractive index of two light-transmitting components 1442 and each third opening O3 can
According to different design requirement (such as：The pitch (pitch) of image-pickup assembly 130) change, and be not limited to above-mentioned.
The first collimator 140C for please referring to Fig. 9 and Figure 10, Fig. 9 is similar to the first collimator 140 of Fig. 4, and first is accurate
Straight device 140C have the advantages that the effect of similar to first collimator 140 and.In addition, the vertical view of the first collimator assembly 142C of Fig. 9
Figure can refer to Fig. 3 and the corresponding paragraph of specification, just no longer be repeated in this.The first of the first collimator 140C and Fig. 4 of Fig. 9 is accurate
The difference of straight device 140 is as described below.The first collimator assembly 142 compared to Fig. 4, the first of the first collimator assembly 142C of Fig. 9
Light-absorption layer 1422 is configured on the side wall surface S1421C of the first light-transmitting component 1421 and further extends on the S1421B of surface, with
Partial mulching surface S1421B, but not limited to this.In another embodiment, the first light-absorption layer 1422 can not be configured first
On the surface S1421B of light-transmitting component 1421 and side wall surface S1421C.
In addition, the second collimator assembly 144 compared to Fig. 4, the second collimator assembly 144C of Fig. 9 further includes multiple second thoroughly
Optical assembly 1442.Second light-transmitting component 1442 is configured in the second opening O2.Specifically, the second light-transmitting component 1442 is arranged at intervals
And it is overlapped in the first opening O1.Light absorbing element 1441 is around the side of the second light-transmitting component 1442 and the second light-transmitting component 1442 of cladding
Wall.Second light-transmitting component 1442 is for example tightly engaged into light absorbing element 1441, and the second light-transmitting component 1442 and light absorbing element
Without the air gap between 1441.That is, the width W1442 of the second light-transmitting component 1442 is respectively equal to the hole of the second opening O2
Diameter WO2.
Second collimator assembly 144C can be fixed on the first collimator assembly 142C by bindiny mechanism or adhesion layer.When first
Between collimator assembly 142C and the second collimator assembly 144C light transfer medium (such as：Air or optical cement) refractive index it is different
When the refractive index of the second light-transmitting component 1442, the light beam B ' of incident second light-transmitting component 1442 can be in the second light-transmitting component 1442
Upper surface S1442 via refraction and enter the second light-transmitting component 1442.Therefore, the setting of the second light-transmitting component 1442 contributes to
Converging beam B ' and then allows more light beam B ' that can be transferred to image-pickup assembly into the angle of the second light-transmitting component 1442
130.For example, silica gel system or acryl system translucent material can be used in the material of the second light-transmitting component 1442.
Into the second collimator assembly 144C light beam whether by light absorbing element 1441 absorption may depend on the second opening O2's
Aperture WO2, the height H2 of the second light-transmitting component 1442 and light beam B ' are in the folding of the upper surface S1442 of the second light-transmitting component 1442
Firing angle (being determined by the incidence angle of light beam B ' and the refractive index of the second light-transmitting component 1442) etc..In the second light-transmitting component 1442
In the case that height H2 is definite value, the aperture WO2 of the second opening O2 is bigger, the light beam B's ' that image-pickup assembly 130 receives
Angular range is bigger.In the case where the aperture WO2 of the second opening O2 is definite value, the height H2 of the second light-transmitting component 1442 is got over
Greatly, the angular range of light beam B ' that image-pickup assembly 130 receives is smaller.In the aperture WO2 and second of the second opening O2
In the case that the height H2 of light-transmitting component 1442 is definite value, the refraction angle of light beam B ' is bigger (namely incidence angle is bigger), more has
It may be absorbed by light absorbing element 1441.In the present embodiment, the refractive index of the second light-transmitting component 1442 is respectively greater than 1, and for example
In the range of respectively falling in 1.3 to 1.7, and the height H2 ratios of the aperture WO2 of each second opening O2 and the second light-transmitting component 1442
It falls in the range of 2 to 20.However, the aperture WO2 and the of the refractive index of the second light-transmitting component 1442 and each second opening O2
The height H2 ratios of two light-transmitting components 1442 can according to different design requirement (such as：The pitch of image-pickup assembly 130
(pitch)) change, and be not limited to above-mentioned.
It is absorbed using the first light-absorption layer 1422 and light absorbing element 1441 and is acted on through object 10 to be identified and pass through leaded light component
120 wide-angle light beam (such as：Light beam B1 '), can make only special angle light beam (light beam of low-angle incidence, such as：Light
Beam B2 ') it is transferred to image-pickup assembly 130.It is open the openings of aperture WO1 and second O2's of O1 via appropriate modulation first
Aperture WO2, can make can be with 0 degree or close to 0 degree of angle incidence image capture group by the light beam B ' of first collimator 140
Part 130.In other words, first collimator 140 helps to will be transmitted to the beam collimation of image-pickup assembly 130.In this way, not
But help to filter out stray light, additionally aid the light beam B ' for avoiding the problem that exporting from different openings and interfere with each other, pick image
Take the capture increased quality of component 130.Therefore, biometric recognition device.It 100 can have good identification capability.
In conclusion in the biometric recognition device.It of the embodiment of the present invention, pass through the opening of modulation first and second
The aperture of opening acts on and by the wide-angle light beam of leaded light component to absorb through object to be identified, will be transmitted to image capture group
The beam collimation of part makes the capture increased quality of image-pickup assembly.Therefore, biometric recognition device.It can have good
Identification capability.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution recorded in foregoing embodiments either to which part or all technical features into
Row equivalent replacement；And these modifications or replacement, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of biometric recognition device.It, which is characterized in that including：
Light source is adapted to provide for light beam；
Leaded light component, on the transmission path of the light beam；
Image-pickup assembly, below the leaded light component and with multiple pixel regions；And
First collimator, between the leaded light component and the image-pickup assembly, wherein the first collimator includes：
First collimator assembly, including the first light-transmitting component, the first light-absorption layer and multiple lens subassemblies, first light-absorption layer is matched
It puts on first light-transmitting component and with multiple first openings for being overlapped in the multiple pixel region, the multiple lens group
Part configuration is on first light-transmitting component and is located in one of respectively in the first opening；And
Second collimator assembly, including light absorbing element, wherein the light absorbing element is open respectively with the multiple first positioned at described
The opposite side of first light-transmitting component, and the light absorbing element has multiple second openings for being overlapped in the multiple first opening.
2. biometric recognition device.It according to claim 1, which is characterized in that the leaded light component have light out part with
And the light in part of the light out part is connected to, the light source is co-located at the image-pickup assembly below the light out part,
The light in part is between the light source and the light out part.
3. biometric recognition device.It according to claim 1, which is characterized in that the leaded light component is towards described first
The surface of collimator is formed with multiple micro-structures, and the surface is protruded or be recessed in the multiple micro-structure.
4. biometric recognition device.It according to claim 1, which is characterized in that the aperture of each the multiple first opening
It is fallen in the range of 2 to 20 with the height ratio of first light-transmitting component.
5. biometric recognition device.It according to claim 1, which is characterized in that the light absorbing element is the second extinction
Layer, second light-absorption layer is between first light-transmitting component and the image-pickup assembly, and the multiple second opens
Mouth is formed in second light-absorption layer, and the aperture of each the multiple second opening and the height ratio of first light-transmitting component are fallen
In the range of 2 to 20.
6. biometric recognition device.It according to claim 5, which is characterized in that the aperture of the multiple second opening is small
In or equal to the multiple first aperture being open.
7. biometric recognition device.It according to claim 5, which is characterized in that second collimator assembly further includes
Two light-transmitting components and third light-absorption layer, second light-transmitting component are located at second light-absorption layer and the image-pickup assembly
Between, and the third light-absorption layer and second light-absorption layer are located at the opposite side of second light-transmitting component respectively, described the
Three light-absorption layers have the multiple thirds opening for being overlapped in the multiple second opening.
8. biometric recognition device.It according to claim 7, which is characterized in that the aperture of the multiple first opening is big
In or equal to it is the multiple second opening aperture, and it is the multiple second opening aperture be greater than or equal to the multiple third
The aperture of opening.
9. biometric recognition device.It according to claim 1, which is characterized in that second collimator assembly further includes more
A second light-transmitting component, the multiple second light-transmitting component configuration is in the multiple second opening, wherein the multiple second
In the range of the refractive index of light-transmitting component respectively falls in 1.3 to 1.7, and the aperture and described second of each the multiple second opening
The height of translucent element is than falling the range Inner 2 to 20.
10. biometric recognition device.It according to claim 1, which is characterized in that further include：
Second collimator, between the leaded light component and the first collimator, second collimator includes multiple ribs
Mirror, and the apex angle of the multiple prism is respectively directed to the leaded light component.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611208441.6A CN108241834A (en) | 2016-12-23 | 2016-12-23 | Biometric recognition device.It |
| TW106102531A TWI637327B (en) | 2016-12-23 | 2017-01-24 | Biological feature identification device |
| PCT/CN2017/078492 WO2018113126A1 (en) | 2016-12-23 | 2017-03-29 | Biometric identification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611208441.6A CN108241834A (en) | 2016-12-23 | 2016-12-23 | Biometric recognition device.It |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108241834A true CN108241834A (en) | 2018-07-03 |
Family
ID=62624348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611208441.6A Pending CN108241834A (en) | 2016-12-23 | 2016-12-23 | Biometric recognition device.It |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN108241834A (en) |
| TW (1) | TWI637327B (en) |
| WO (1) | WO2018113126A1 (en) |
Cited By (3)
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|---|---|---|---|---|
| CN111366997A (en) * | 2020-04-16 | 2020-07-03 | 欧菲微电子技术有限公司 | Micro-lens array, biological identification module and electronic equipment thereof |
| WO2020199142A1 (en) * | 2019-04-02 | 2020-10-08 | 深圳市汇顶科技股份有限公司 | Optical collimator and fabrication method therefor |
| WO2020243936A1 (en) * | 2019-06-05 | 2020-12-10 | 深圳市汇顶科技股份有限公司 | Under-screen biometric feature identification apparatus and electronic device |
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|---|---|---|---|---|
| US10733413B2 (en) | 2018-08-29 | 2020-08-04 | Fingerprint Cards Ab | Optical in-display fingerprint sensor and method for manufacturing such a sensor |
| TWI757053B (en) * | 2020-08-17 | 2022-03-01 | 友達光電股份有限公司 | Biological feature identification system and method thereof |
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| CN102842026A (en) * | 2011-06-24 | 2012-12-26 | 金佶科技股份有限公司 | Fingerprint identification device |
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Also Published As
| Publication number | Publication date |
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| WO2018113126A1 (en) | 2018-06-28 |
| TWI637327B (en) | 2018-10-01 |
| TW201824074A (en) | 2018-07-01 |
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