CN108241838A - Biometric recognition device.It - Google Patents
Biometric recognition device.It Download PDFInfo
- Publication number
- CN108241838A CN108241838A CN201611209428.2A CN201611209428A CN108241838A CN 108241838 A CN108241838 A CN 108241838A CN 201611209428 A CN201611209428 A CN 201611209428A CN 108241838 A CN108241838 A CN 108241838A
- Authority
- CN
- China
- Prior art keywords
- light
- translucent element
- opening
- absorption layer
- biometric recognition
- 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.)
- Pending
Links
Classifications
-
- 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
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F18/00—Pattern recognition
Abstract
The present invention provides a kind of biometric recognition device.It, including light source, light-guide device, image capture element and first collimator.Light source is adapted to provide for light beam.Light-guide device is located on the transmission path of light beam.Image capture element is located at below light-guide device and with multiple pixel regions.First collimator is between light-guide device and image capture element, and wherein first collimator includes the first translucent element, the second translucent element, the first light-absorption layer, the second light-absorption layer and third light-absorption layer.The configuration of first light-absorption layer is on the first translucent element and with the multiple first openings.Second light-absorption layer is between the first translucent element and the second translucent element and with the multiple second openings.The configuration of third light-absorption layer is on surface of second translucent element towards image capture element and with multiple thirds opening, wherein first is open, second is open with third superposition of end gap in pixel region.The biometric recognition device.It of the present invention can have good identification capability.
Description
Technical field
The present invention relates to be related to a kind of biometric recognition device.It.
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 element (cover lens) more.In general, need additional processing (such as
Drilling or thinning) protection element, 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, the acquisition of optical fingerprint device for identifying penetrate readily through the light of protection element into
Row identification of fingerprint, and additional processing protection element can not had to, thus and the combination of electronic product on it is more convenient.
Optical fingerprint device for identifying generally includes light source, image capture element and translucent element.Light source is sending out light
Beam, the finger being pressed on irradiation on translucent element.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 capture element.Image is picked
It takes element 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
Cheng Zhong is easily dispersedly transferred to image capture element by the light beam that fingerprint reflects, and causes capture poor quality, influences 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, light-guide device, image capture element and
First collimator.Light source is adapted to provide for light beam.Light-guide device is located on the transmission path of light beam.Image capture element is located at leaded light
Below element and with multiple pixel regions.First collimator is between light-guide device and image capture element, wherein first is accurate
Straight device includes the first translucent element, the second translucent element, the first light-absorption layer, the second light-absorption layer and third light-absorption layer.Second thoroughly
Optical element is between the first translucent element and image capture element.The configuration of first light-absorption layer is on the first translucent element and has
Multiple first openings.Second light-absorption layer is between the first translucent element and the second translucent element and with the multiple second openings.
The configuration of third light-absorption layer is on surface of second translucent element towards image capture element and with multiple thirds opening.First opens
Mouth, the second opening are with third superposition of end gap in pixel region.
In biometric recognition device.It according to an embodiment of the invention, light-guide device has light out part and is connected to
The light in part of light out part.Light source is co-located at image capture element 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, light source is located at the side of light-guide device.
In biometric recognition device.It according to an embodiment of the invention, light-guide device 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 first translucent element and the second translucent element
Refractive index respectively fall in the range of 1.3 to 1.7.
In biometric recognition device.It according to an embodiment of the invention, aperture and the first light transmission member of each first opening
The height ratio of part is fallen in the range of 2 to 20.The aperture of each second opening is with the height of the first translucent element than falling 2 to 20
In the range of.The aperture of each third opening and the height ratio of the second translucent element are fallen in the range of 2 to 20.
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 first light-absorption layer or the second light-absorption layer also configure
In the side wall surface of the first translucent element.
In biometric recognition device.It according to an embodiment of the invention, biometric recognition device.It further includes cover board,
Wherein light-guide device is between cover board and first collimator.
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 light-guide device and first collimator.
In biometric recognition device.It according to an embodiment of the invention, the second collimator includes multiple prisms, and rib
The apex angle of mirror is respectively directed to light-guide device.
Based on above-mentioned, in the biometric recognition device.It of the embodiment of the present invention, it is open by modulation first, second opens
Mouth and the aperture of third opening act on and by the wide-angle light beam of light-guide device to absorb through object to be identified, will be transmitted to shadow
As the beam collimation of capturing element, make the capture quality-improving of image capture element.Therefore, biometric recognition device.It can have
There is 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 light-guide device in Fig. 1；
Fig. 3 is a kind of schematic diagram of first collimator in Fig. 1；
Fig. 4 is a kind of diagrammatic cross-section of first collimator, image capture element and circuit board in Fig. 1；
Fig. 5 is light-guide device 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.
Drawing reference numeral explanation：
10：Object to be identified；
100、100A：Biometric recognition device.It；
110：Light source；
112：Light-emitting component；
120、120A：Light-guide device；
122：Light out part；
124：Light in part；
130：Image capture element；
132：Charge coupled cell；
140：First collimator；
141：First translucent element；
142：Second translucent element；
143：First light-absorption layer；
144：Second light-absorption layer；
145：Third light-absorption layer；
150：Circuit board；
160：Cover board；
170：Second collimator；
172：Prism；
B、B’、B1’、B2’、B3’：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’、S1411、S1412、S1421、S1422：Surface；
S1：First reflecting surface；
S2：Second reflecting surface；
S1413、S1423：Side wall surface；
TA：Apex angle；
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 similar elements 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, light-guide device 120, image capture element 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 a plurality of light-emitting elements
112.Light-emitting component 112 can be light-emitting diode or the light-emitting component of other appropriate types.Fig. 1 schematically shows that two shine
Element 112, and two light-emitting components 112 are in the opposite side of image capture element 130.However, the quantity of light-emitting component 112 with
And configuration mode can change on demand, and be not limited.
Light-guide device 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 light-guide device 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 light-guide device 120 with image capture element 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.Light-guide device 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 capturing element 130 is co-located at 122 lower section of light out part, and light source 110 is located at by image capture element 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 light-guide device 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 light-guide device 120, and light beam B can be transferred to light out part 122 via light in part 124.Light-guide device 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 light-guide device, and light-guide device 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 element (cover
Lens), but not limited to this.In one embodiment, cover board 160 can be by bindiny mechanism or adhesion layer (example with light-guide device 120
Such as：Optical cement) and be fixed together, but not limited to this.In the case of cover board 160 and light-guide device 120 being fixed with adhesion layer,
The refractive index of adhesion layer, cover board 160 and light-guide device 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 element 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, light-guide device 120 can be projected from surface S by being transferred to another part of the light beam B ' of surface S.
Image capture element 130 is located at 120 lower section of light-guide device 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 capture element 130 is for example including multiple charge coupled cell (Charge-Coupled
Device, CCD) 132 (being shown in Fig. 4).Charge coupled cell 132 is configured on circuit board 150 and is electrically connected with circuit board 150
It connects.The region of charge coupled cell 132 is the pixel region PR of image capture element 130.In another embodiment, image is picked
Element 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 capture element 130
PR。
First collimator 140 is between light-guide device 120 and image capture element 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 member
On part 130, and first collimator 140 and image capture element 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 first collimator in Fig. 1, shows the front and the back side of first collimator.Fig. 4 is figure
A kind of diagrammatic cross-section of first collimator, image capture element and circuit board in 1.Please refer to Fig. 1, Fig. 3 and Fig. 4, first
Collimator 140 include the first translucent element 141, the second translucent element 142, the first light-absorption layer 143, the second light-absorption layer 144 and
Third light-absorption layer 145.
Second translucent element 142 is between the first translucent element 141 and image capture element 130.First translucent element
141 and second translucent element 142 be adapted to allow for acting on through object 10 to be identified and by the light beam B ' of light-guide device 120 passing through.It lifts
For example, the material of the first translucent element 141 and the second translucent element 142 can be glass, makrolon (PC), poly- methyl-prop
E pioic acid methyl ester (PMMA) or other suitable materials.
First light-absorption layer 143 is configured on the first translucent element 141 and with the multiple first opening O1.Second light-absorption layer
144 between the first translucent element 141 and the second translucent element 142 and with the multiple second opening O2.Third light-absorption layer 145
Configuration is on surface S1421 of second translucent element 142 towards image capture element 130 and with multiple thirds opening O3.The
One opening O1, the second opening O2 and third opening O3 are overlapped in pixel region PR.
In the present embodiment, the first light-absorption layer 143 and the second light-absorption layer 144 are arranged respectively at the first translucent element 141
On opposite surface S1411 and surface S1412, and the second translucent element 142 can by bindiny mechanism or adhesion layer (such as：Light
Learn glue) and the side that the first translucent element 141 is formed with the second light-absorption layer 144 is fixed on, but not limited to this.In another implementation
In example, the second light-absorption layer 144 can be arranged respectively at the opposite surface S1422 of the second translucent element 142 with third light-absorption layer 145
With on the S1421 of surface, and the first translucent element 141 can by bindiny mechanism or adhesion layer (such as：Optical cement) and it is fixed on
Two translucent elements 142 are formed with the side of the second light-absorption layer 144.In another embodiment, the second light-absorption layer 144 can be pre-formed
In third translucent element (not shown), and third translucent element can be fixed on the first light transmission by bindiny mechanism or adhesion layer
Between 141 and second translucent element 142 of element.
When between light-guide device 120 and first collimator 140 light transfer medium (such as：Air or optical cement) refraction
When rate is different from the refractive index of the first translucent element 141, the light beam B ' of incident first translucent element 141 is (including large angle incidence
The light beam B3 ' of light beam B1 ' and light beam B2 ' and low-angle the first translucent element 141 of incidence of first translucent element 141) it can exist
The surface S1411 of first translucent element 141 enters the first translucent element 141 via refraction.Therefore, the first translucent element 141
Setting contribute to converging beam B ' into the angle of first collimator 140, and then allow more light beam B ' that shadow can be transferred to
As capturing element 130.
The material of first light-absorption layer 143, the second light-absorption layer 144 and third light-absorption layer 145 for example can be used containing extinction
Material (such as：Carbon) silica gel system or acryl based material.Thus, even if the first translucent element of large angle incidence 141
The light beam B3 ' of light beam B1 ' and light beam B2 ' and incident first translucent element 141 of low-angle is all entered by the first opening O1
First translucent element 141, still using the second light-absorption layer between the first translucent element 141 and the second translucent element 142
144 light beams for absorbing large angle incidence the first translucent elements 141 (such as：Light beam B1 ').Even if there is part large angle incidence first
Translucent element 141 light beam (such as：Light beam B2 ') by second opening O2 and enter the second translucent element 142, still using neighbour
Be bordering on image capture element 130 third light-absorption layer 145 absorb the light beam of large angle incidence the second translucent element 142 (such as：Light
Beam B2 '), and only allow low-angle incidence first collimator 140 light beam B3 ' by and be transferred to image capture element 130.
Into first collimator 140 light beam whether by light-absorption layer (including the first light-absorption layer 143, the second light-absorption layer 144 with
And third light-absorption layer 145) absorb the aperture WO1 that may depend on the first opening O1, the aperture WO2 of the second opening O2, third opening
The aperture WO3 of O3, the height (height of height H1 and the second translucent element 142 including the first translucent element 141 of translucent element
Spend H2) and light beam B ' translucent element (including the first translucent element 141 and the second translucent element 142) incidence surface
Refraction angle (being determined by the incidence angle of light beam B ' and the refractive index of translucent element) etc..In the feelings that the height of translucent element is definite value
Under condition, the aperture WO3 of the aperture WO1 of the first opening O1, the aperture WO2 of the second opening O2 and third opening O3 are bigger, image
The angular range of light beam B ' that capturing element 130 receives is bigger.The hole of aperture WO1, the second opening O2 in the first opening O1
The aperture WO3 of diameter WO2 and third opening O3 are in the case of definite value, the height of translucent element is bigger, image capture element 130
The angular range of light beam B ' received is smaller.Aperture WO1, the aperture WO2 of the second opening O2 in the first opening O1, third are opened
In the case that the aperture WO3 of mouth O3 and the height of translucent element are definite value, bigger (the namely incidence angle in refraction angle of light beam B '
It is bigger), it is more possible to be absorbed by light-absorption layer.In the present embodiment, the first translucent element 141 and the second translucent element 142
Refractive index is respectively greater than 1, and for example falls in the range of 1.3 to 1.7.In addition, the aperture WO1 and first of each first opening O1 is saturating
The height H1 ratios of optical element 141 are fallen in the range of 2 to 20.The aperture WO2 and first translucent element 141 of each second opening O2
Height H1 ratios are fallen in the range of 2 to 20.The aperture WO3 and the height H2 ratios of the second translucent element 142 of each third opening O3 is fallen
In the range of 2 to 20.However, the height ratio of the refractive index of above-mentioned each translucent element and the aperture of opening and translucent element can
According to different design requirement (such as：The pitch (pitch) of image capture element 130) change, and be not limited to above-mentioned.
The aperture WO1 of first opening O1 can be greater than or equal to the aperture WO2 of the second opening O2, and the aperture of the second opening O2
WO2 can be greater than or equal to the aperture WO3 of third opening O3.In the present embodiment, the aperture WO1 of the first opening O1, the second opening
The aperture WO2 of O2 is identical with the aperture WO3 of third opening O3.Furthermore, the first opening O1, the second opening O2 and third are opened
Mouth O3 has identical or substantially the same shape and size.So-called substantially the same shape and size are that system is contemplated
Make the error caused by technique.In addition, the first opening O1, the second opening O2 and third opening O3 are aligned in pixel region PR, so that
Image capture element 130 sequentially can be transferred to (as schemed by the first opening O1, the second opening O2 and the light beam of third opening O3
4 light beam B3 ' is shown).In addition, the size of pixel region PR may be slightly larger than the aperture WO1 of the first opening O1, the second opening O2
The aperture WO3 of aperture WO2 and third opening O3, but not limited to this.Furthermore the first light-absorption layer 143 or the second light-absorption layer 144 can
Further configuration is on the side wall surface S1413 of the first translucent element 141, to avoid the light being transmitted in the first translucent element 141
Beam is projected from side wall surface S1413.Identical material can be used and by with along in first light-absorption layer 143 and the second light-absorption layer 144
Manufacture craft pattern is formed, and but not limited to this.In another embodiment, third light-absorption layer 145 also can be further configured
On the side wall surface S1423 of second translucent element 142.Alternatively, the first light-absorption layer 143 and the second light-absorption layer 144 can not be configured
On the side wall surface S1413 of the first translucent element 141, and third light-absorption layer 145 can not be configured in the second translucent element 142
On side wall surface S1423.According to different demands, biometric recognition device.It 100 can also further increase translucent element and suction
The quantity of photosphere.
It is absorbed using light-absorption layer (including the first light-absorption layer 143, the second light-absorption layer 144 and third light-absorption layer 145) through treating
Identification object 10 act on and by the wide-angle light beam of light-guide device 120 (such as：Light beam B1 ' and light beam B2 '), it can make only specific
Angle light beam (light beam of low-angle incidence, such as：Light beam B3 ') it is transferred to image capture element 130.Via appropriate modulation
The aperture WO3 of the aperture WO1 of first opening O1, the aperture WO2 of the second opening O2 and third opening O3, can make by first
The light beam B ' of collimator 140 can be with 0 degree or close to 0 degree of angle incidence image capture element 130.In other words, first is accurate
Straight device 140 helps to will be transmitted to the beam collimation of image capture element 130.Stray light is filtered out in this way, not only helping, also
Help avoid from the light beam B ' that different openings export interfere with each other the problem of, put forward the capture quality of image capture element 130
It rises.Therefore, biometric recognition device.It 100 can have good identification capability.Fig. 3 schematically shows the first opening O1,
The shape of two opening O2 and third opening O3 are circle, and but not limited to this.In other embodiments, the first opening O1, the
The shape of two opening O2 and third opening O3 can also be triangle, quadrangle, pentagon or other polygons.
According to different demands, biometric recognition device.It 100 may also include other elements.For example, biological characteristic is distinguished
Identification device 100 may also include the second collimator 170.Second collimator 170 be located at light-guide device 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 light-guide device 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, in advance by light beam B ' collimationization, with
The angle of divergence of converging beam B '.In this way, probability of the light beam B ' subsequently through first collimator 140 can be increased.Fig. 5 is to be led in Fig. 1
A kind of enlarged drawing of optical element and the second collimator.Fig. 1 and Fig. 5 is please referred to, the second collimator 170 may include multiple prisms
172, and the apex angle TA of prism 172 is respectively directed to light-guide device 120.In the present embodiment, two base angle BA of each prism 172
Angle is identical.However, the apex angle TA and base angle BA of prism 172 can change according to different demands, and it is 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 light-guide device 120A.Under this framework, light-guide device 120A is, for example, plate, and light-guide device 120A can be omitted
The light in part 124 of light-guide device 120 in Fig. 1.
In conclusion in the biometric recognition device.It of the embodiment of the present invention, it is open by modulation first, second opens
Mouth and the aperture of third opening act on and by the wide-angle light beam of light-guide device to absorb through object to be identified, will be transmitted to shadow
As the beam collimation of capturing element, make the capture quality-improving of image capture element.Therefore, biometric recognition device.It can have
There is 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；
Light-guide device, on the transmission path of the light beam；
Image capture element, below the light-guide device and with multiple pixel regions；And
First collimator, between the light-guide device and the image capture element, wherein the first collimator includes：
First translucent element；
Second translucent element, between first translucent element and the image capture element；
First light-absorption layer is configured on first translucent element and with the multiple first openings；
Second light-absorption layer, between first translucent element and second translucent element and with the multiple second openings；
And
Third light-absorption layer is configured in second translucent element towards on the surface of the image capture element and with multiple the
Three openings, wherein the multiple first opening, the multiple second opening and the multiple third superposition of end gap are in the pixel
Area.
2. biometric recognition device.It according to claim 1, which is characterized in that the light-guide device 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 capture element 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 light source is located at the light-guide device
Side.
4. biometric recognition device.It according to claim 1, which is characterized in that the light-guide device 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.
5. biometric recognition device.It according to claim 1, which is characterized in that first translucent element and described
The refractive index of second translucent element is respectively fallen in the range of 1.3 to 1.7.
6. 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 translucent element, the aperture and described the of each the multiple second opening
The height ratio of one translucent element is fallen in the range of 2 to 20, and the aperture of each the multiple third opening and second light transmission
The height ratio of element is fallen in the range of 2 to 20.
7. biometric recognition device.It according to claim 1, 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.
8. biometric recognition device.It according to claim 1, which is characterized in that first light-absorption layer or described second
Light-absorption layer is also disposed in the side wall surface of first translucent element.
9. biometric recognition device.It according to claim 1, which is characterized in that further include：
Cover board, wherein the light-guide device is between the cover board and the first collimator.
10. biometric recognition device.It according to claim 1, which is characterized in that further include：
Second collimator, between the light-guide device and the first collimator, second collimator includes multiple ribs
Mirror, and the apex angle of the multiple prism is respectively directed to the light-guide device.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611209428.2A CN108241838A (en) | 2016-12-23 | 2016-12-23 | Biometric recognition device.It |
| TW106102516A TW201824069A (en) | 2016-12-23 | 2017-01-24 | Biological feature identification device |
| PCT/CN2017/076324 WO2018113103A1 (en) | 2016-12-23 | 2017-03-10 | Biometric identification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611209428.2A CN108241838A (en) | 2016-12-23 | 2016-12-23 | Biometric recognition device.It |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108241838A true CN108241838A (en) | 2018-07-03 |
Family
ID=62624331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611209428.2A Pending CN108241838A (en) | 2016-12-23 | 2016-12-23 | Biometric recognition device.It |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN108241838A (en) |
| TW (1) | TW201824069A (en) |
| WO (1) | WO2018113103A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110349984B (en) * | 2018-04-01 | 2021-08-03 | 广州印芯半导体技术有限公司 | Integrated circuit with optical structure |
| CN109299708A (en) * | 2018-11-30 | 2019-02-01 | 上海箩箕技术有限公司 | Optical fingerprint sensor mould group and forming method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842026A (en) * | 2011-06-24 | 2012-12-26 | 金佶科技股份有限公司 | Fingerprint identification device |
| CN103019474A (en) * | 2012-09-25 | 2013-04-03 | 友达光电股份有限公司 | Optical touch scanning device |
| CN104662409A (en) * | 2012-10-26 | 2015-05-27 | 索尼公司 | Light concentration unit, light concentration method and light detection system |
| CN105550664A (en) * | 2016-01-08 | 2016-05-04 | 上海箩箕技术有限公司 | Optical fingerprint sensor module |
| CN105844212A (en) * | 2015-02-02 | 2016-08-10 | 辛纳普蒂克斯公司 | Optical sensor using collimator |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4748199B2 (en) * | 2008-09-30 | 2011-08-17 | ソニー株式会社 | Vein imaging apparatus and vein imaging method |
| CN101789074B (en) * | 2009-01-23 | 2014-10-01 | 金佶科技股份有限公司 | Light guide module of optical fingerprint identification system |
| WO2015015138A1 (en) * | 2013-07-31 | 2015-02-05 | Milan Momcilo Popovich | Method and apparatus for contact image sensing |
| CN104182727B (en) * | 2014-05-16 | 2021-07-30 | 深圳印象认知技术有限公司 | Ultra-thin fingerprint and palm print acquisition device and fingerprint and palm print image acquisition method |
-
2016
- 2016-12-23 CN CN201611209428.2A patent/CN108241838A/en active Pending
-
2017
- 2017-01-24 TW TW106102516A patent/TW201824069A/en unknown
- 2017-03-10 WO PCT/CN2017/076324 patent/WO2018113103A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842026A (en) * | 2011-06-24 | 2012-12-26 | 金佶科技股份有限公司 | Fingerprint identification device |
| CN103019474A (en) * | 2012-09-25 | 2013-04-03 | 友达光电股份有限公司 | Optical touch scanning device |
| CN104662409A (en) * | 2012-10-26 | 2015-05-27 | 索尼公司 | Light concentration unit, light concentration method and light detection system |
| CN105844212A (en) * | 2015-02-02 | 2016-08-10 | 辛纳普蒂克斯公司 | Optical sensor using collimator |
| CN105550664A (en) * | 2016-01-08 | 2016-05-04 | 上海箩箕技术有限公司 | Optical fingerprint sensor module |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018113103A1 (en) | 2018-06-28 |
| TW201824069A (en) | 2018-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206470775U (en) | Biometric recognition device.It | |
| CN108241830A (en) | Biometric recognition device.It | |
| KR101915121B1 (en) | Display screen with fingerprint acquisition | |
| CN206470777U (en) | Biometric recognition device.It | |
| CN206489580U (en) | Biometric recognition device.It | |
| CN108241834A (en) | Biometric recognition device.It | |
| WO2018113105A1 (en) | Biometric identification device | |
| CN206497471U (en) | Biometric recognition device.It | |
| CN108241838A (en) | Biometric recognition device.It | |
| CN206470779U (en) | Biometric recognition device.It | |
| CN108241824A (en) | Biometric recognition device.It | |
| CN206657362U (en) | Biological identification device | |
| CN106264448B (en) | Skin analysis device and its image acquisition module | |
| CN108629245B (en) | Biometric identification device | |
| CN206470776U (en) | Biometric recognition device.It | |
| CN108241823A (en) | Biometric recognition device.It | |
| US20110057130A1 (en) | Flip-chip type image-capturing module | |
| CN108629243A (en) | Biometric devices | |
| CN206657363U (en) | Biological identification device | |
| CN108241826A (en) | Biometric recognition device.It | |
| CN108629244A (en) | Biological identification device | |
| CN206541316U (en) | Biometric recognition device.It | |
| CN108241833A (en) | Biometric recognition device.It | |
| CN206877339U (en) | Biometric devices | |
| CN108241832A (en) | Biological identification device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180703 |
|
| WD01 | Invention patent application deemed withdrawn after publication |