CN108241823A - Biometric recognition device.It - Google Patents
Biometric recognition device.It Download PDFInfo
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- CN108241823A CN108241823A CN201611206312.3A CN201611206312A CN108241823A CN 108241823 A CN108241823 A CN 108241823A CN 201611206312 A CN201611206312 A CN 201611206312A CN 108241823 A CN108241823 A CN 108241823A
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- Prior art keywords
- light
- translucent
- collimator
- biometric recognition
- guide device
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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
-
- 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 including the first collimating element and the second collimating element.First collimating element includes the first translucent element and light-absorption layer.Light-absorption layer configuration is on the first translucent element and with multiple openings.Second collimating element is located at the opposite side of the first translucent element with opening respectively, and the second collimating element includes extinction element and multiple second translucent elements.Second translucent element is arranged at intervals and is overlapped in opening.Extinction element ring is around the second translucent element and the side wall of the second translucent element of cladding.The refractive index of second translucent element is respectively greater than 1.Biometric recognition device.It 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 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 collimating element and the second collimating element.First collimating element includes the first translucent element and light-absorption layer.
Light-absorption layer configuration is on the first translucent element and with the multiple openings for being overlapped in pixel region.Second collimating element is distinguished with opening
Positioned at the opposite side of the first translucent element, and the second collimating element includes extinction element and multiple second translucent elements.Second
Translucent element is arranged at intervals and is overlapped in opening.Extinction element ring is around the side of the second translucent element and the second translucent element of cladding
Wall.The refractive index of second translucent element is respectively greater than 1.
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 aperture and the first translucent element that are respectively open
Highly ratio is fallen in the range of 2 to 20.
In biometric recognition device.It according to an embodiment of the invention, the refractive index of the second translucent element is respectively fallen in
In the range of 1.3 to 1.7, and the width of the second translucent element is respectively fallen in height ratio in the range of 2 to 20.
In biometric recognition device.It according to an embodiment of the invention, light-absorption layer is also disposed at the first translucent element
In side wall surface.
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, the first collimating element and are utilized
Two collimating elements will be transmitted to the beam collimation of image capture element, make the capture quality-improving of image capture element.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 light-guide device in Fig. 1；
Fig. 3 A are a kind of schematic top plan view of the first collimating element of first collimator in Fig. 1；
Fig. 3 B are a kind of elevational schematic view of the first collimating element 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. 4 A are another 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、140A：First collimator；
142：First collimating element；
144：Second collimating element；
150：Circuit board；
160：Cover board；
170：Second collimator；
172：Prism；
1421：First translucent element；
1422：Light-absorption layer；
1441：Extinction element；
1442：Second translucent element；
WO：Aperture；
B、B’、B1’、B2’、B3’：Light beam；
BA：Base angle；
C：Recess；
H1、H2：Highly；
M：Micro-structure；
O：Opening；
PR：Pixel region；
S、S’：Surface；
S1：First reflecting surface；
S2：Second reflecting surface；
S1421A、S1442：Upper surface；
S1421B：Lower surface；
S1421C：Side wall surface；
SS：Side wall；
TA：Apex angle；
W1442：Width.
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 (do not show, such as：Optical cement) it is fixed together.Again
In one embodiment, light in part 124 can by adhesion layer (do not show, 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, 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 A are a kind of schematic top plan view of the first collimating element of first collimator in Fig. 1.Fig. 3 B are the first standard in Fig. 1
A kind of elevational schematic view of first collimating element of straight device.Fig. 4 is first collimator, image capture element and circuit in Fig. 1
A kind of diagrammatic cross-section of plate.Fig. 1, Fig. 3 A, Fig. 3 B and Fig. 4 are please referred to, first collimator 140 includes the first collimating element 142
And it is overlapped in the second collimating element 144 of the first collimating element 142.In the present embodiment, the second collimating element 144 is located at the
Between one collimating element 142 and image capture element 130, and the first collimating element 142 and the second collimating element 144 can be by even
Connection mechanism or adhesion layer (such as：Optical cement) and be fixed together, but not limited to this.
First collimating element 142 includes the first translucent element 1421 and light-absorption layer 1422.Light-absorption layer 1422 is configured
On one translucent element 1421 and with the multiple opening O for being overlapped in pixel region PR.Second collimating element 144 and opening O difference position
In the opposite side of the first translucent element 1421.That is, opening O is formed in the first translucent element 1421 far from the second collimation member
On the surface of part 144.In the present embodiment, light-absorption layer 1422 is configured on the upper surface S1421A of the first translucent element 1421,
And opening O is formed in light-absorption layer 1422 of the configuration on the S1421A of upper surface.According to different demands, light-absorption layer 1422 may be used also
Further configuration is in the other surfaces of the first translucent element 1421.For example, light-absorption layer 1422 can be further configured
On the side wall surface S1421C of one translucent element 1421, to avoid the light beam being transmitted in the first translucent element 1421 from side wall surface
S1421C is projected.In addition, light-absorption layer 1422 also may be further extended to the lower surface S1421B of the first translucent element 1421, with office
Portion covers lower surface S1421B, and but not limited to this.In another embodiment, light-absorption layer 1422 can not be configured in the first light transmission
On the lower surface S1421B of element 1421 and side wall surface S1421C.
Second collimating element 144 includes extinction element 1441 and multiple second translucent elements 1442.Second translucent element
1442 are arranged at intervals and are overlapped in opening O.Extinction element 1441 is around the second translucent element 1442 and the second translucent element of cladding
1442 side wall SS.In the present embodiment, the second translucent element 1442 is for example tightly engaged into extinction element 1441, and second is saturating
Without the air gap between optical element 1442 and extinction element 1441.
The refractive index of first translucent element 1421 is more than 1.Light between 120 and first collimating element 142 of light-guide device
Transfer medium (such as：Air or optical cement) refractive index be different from the first translucent element 1421 refractive index when, incidence first
(the light beam B1 ' including large angle incidence translucent element 142 enters the light beam B ' of translucent element 1421 with light beam B2 ' and low-angle
Penetrate the light beam B3 ' of translucent element 142) first can be entered thoroughly via refraction in the upper surface S1421A of the first translucent element 1421
Optical element 1421.Therefore, the setting of the first translucent element 1421 contributes to converging beam B ' into the angle of first collimator 140
Degree, and then allow more light beam B ' that the second collimating element 144 can be transferred to.In addition, the refractive index of the second translucent element 1442
Respectively greater than 1.When between the first collimating element 142 and the second collimating element 144 light transfer medium (such as：Air or optics
Glue) refractive index when being different from the refractive index of the second translucent element 1442, the light beam B ' of incident second translucent element 1442 can exist
The upper surface S1442 of second translucent element 1442 enters the second translucent element 1442 via refraction.Therefore, the second translucent element
1442 setting contributes to converging beam B ' into the angle of the second translucent element 1442, and then more light beam B ' can be passed
It is handed to image capture element 130.For example, the material of the first translucent element 1421 and the second translucent element 1442 can be used
Silica gel system or acryl system translucent material.
The material of light-absorption layer 1422 and extinction element 1441 for example can be used containing light absorbent (such as：Carbon) silica gel
System or acryl based material.Thus, even if the light beam B1 ' and light beam B2 ' of the first translucent element of large angle incidence 1421 with
And the light beam B3 ' of incident first translucent element 1421 of low-angle all enters the first translucent element 1421 by being open O, it still can profit
It is accurate that large angle incidence second is absorbed with the extinction element 1441 between the first collimating element 142 and image capture element 130
Straight element 144 light beam (such as：Light beam B1 ' and light beam B2 '), and only allow the light beam B3 ' of low-angle incidence first collimator 140
By and be transferred to image capture element 130.
Into first collimator 140 light beam whether by light-absorption layer 1422 and extinction element 1441 absorption may depend on out
Aperture WO, the width W1442 of the second translucent element 1442, the height H1 of the first translucent element 1421, the second translucent element of mouth O
1442 height H2 and light beam B ' is at the refraction angle of the upper surface S1421A of the first translucent element 1421 (by the incidence of light beam B '
The refractive index of angle and the first translucent element 1421 determines) etc..Height H1 and the second light transmission in the first translucent element 1421
In the case that the height H2 of element 1442 is definite value, the width W1442 of the aperture WO for the O that is open and the second translucent element 1442 is got over
Greatly, the angular range of light beam B ' that image capture element 130 receives is bigger.In the aperture WO of opening O and the second light transmission member
In the case that the width W1442 of part 1442 is definite value, the height H1 of the first translucent element 1421 and the second translucent element 1442
Height H2 it is bigger, the angular range of light beam B ' that image capture element 130 receives is smaller.Opening O aperture WO, second
The height H2 of the width W1442 of translucent element 1442, the height H1 of the first translucent element 1421 and the second translucent element 1442
In the case of definite value, the refraction angle of light beam B ' is bigger (namely incidence angle is bigger), be more possible to by light-absorption layer 1422 and
Extinction element 1441 absorbs.In the present embodiment, the refractive index of the first translucent element 1421 is fallen in the range of 1.3 to 1.7.The
The refractive index of two translucent elements 1442 is respectively fallen in the range of 1.3 to 1.7.The aperture WO and the first translucent element of each opening O
1421 height H1 ratios are fallen in the range of 2 to 20.Width W1442 and height the H2 ratio of second translucent element 1442 are respectively fallen in
In the range of 2 to 20.However, the refractive index of the first translucent element 1421 and the second translucent element 1442, the aperture of each opening O
Width W1442 and height the H2 ratio of the height H1 ratios and the second translucent element 1442 of WO and the first translucent element 1421 can foundations
Different design requirement (such as：The pitch (pitch) of image capture element 130) change, and be not limited to above-mentioned.
It is absorbed and is acted on through object 10 to be identified and by light-guide device 120 using light-absorption layer 1422 and extinction element 1441
Wide-angle light beam (such as：Light beam B1 ' and light beam B2 '), light beam (light beam of low-angle incidence, the example of only special angle can be made
Such as：Light beam B3 ') it is transferred to image capture element 130.Via the aperture WO and the second translucent element of appropriate modulation opening O
1442 width W1442, can make can be with 0 degree or close to 0 degree of angle incidental image by the light beam B ' of first collimator 140
As capturing element 130.In other words, first collimator 140 helps to will be transmitted to the beam collimation of image capture element 130
Change.Stray light is filtered out in this way, not only helping, additionally aids and avoids what is exported from different openings O or the second translucent element 1442
The problem of light beam B ' is interfered with each other makes the capture quality-improving of image capture element 130.Therefore, biometric recognition device.It 100
There can be good identification capability.In the present embodiment, be open O and the second translucent element 1442 cross section shape for example
For circle, but not limited to this.In other embodiments, the shape of the cross section of opening O and the second translucent element 1442
Can be triangle, quadrangle, pentagon or other polygons.
The aperture WO of opening O and the width W1442 of the second translucent element 1442 can be identical, and the O and second that is open is saturating
Optical element 1442 is aligned in pixel region PR, so as to can be sequentially transferred to by the light beam of be open O and the second translucent element 1442
Image capture element 130 (as shown in the light beam B3 ' of Fig. 4).In the present embodiment, the size of pixel region PR may be slightly larger than opening
The width W1442 of the aperture WO of O and the second translucent element 1442, but not limited to this.
Fig. 4 A are another diagrammatic cross-section of first collimator, image capture element and circuit board in Fig. 1.Fig. 4 A's
First collimator 140A is similar to the first collimator 140 of Fig. 4, and first collimator 140A has and 140 phase of first collimator
As effect and advantage, just no longer repeated in this.The difference of the first collimator 140 of the first collimator 140A and Fig. 4 of Fig. 4 A
It is the relative configuration relationship of the first collimating element 142 and the second collimating element 144.Specifically, in the embodiment of Fig. 4 A,
First collimating element 142 is between the second collimating element 144 and image capture element 130.Under this framework, light-absorption layer 1422
Configuration is on the lower surface S1421B of the first translucent element 1421, and the O that is open is formed in suction of the configuration on the S1421B of lower surface
In photosphere 1422.Light-absorption layer 1422 can be further configured on the side wall surface S1421C of the first translucent element 1421, and can be into
One step extends to the upper surface S1421A of the first translucent element 1421, and with partial mulching upper surface S1421A, but not limited to this.
Referring again to Fig. 1, according to different demands, biometric recognition device.It 100 may also include other elements.Citing and
Speech, biometric recognition device.It 100 may also include the second collimator 170.Second collimator 170 is located at light-guide device 120 and
Between collimator 140, and the second collimator 170 is located on the transmission path of the light beam B ' after object 10 to be identified effect.Citing
For, the second collimator 170 is configurable on the S of surface, and 120 and second collimator 170 of light-guide device can be 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 light-guide device 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 light-guide device 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 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, the first collimating element and are utilized
Two collimating elements will be transmitted to the beam collimation of image capture element, make the capture quality-improving of image capture element.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；
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 collimating element, including the first translucent element and light-absorption layer, the light-absorption layer configuration is in first translucent element
Above and with the multiple openings for being overlapped in the multiple pixel region；And
Second collimating element, wherein second collimating element is located at first translucent element respectively with the multiple opening
Opposite side, and second collimating element includes extinction element and multiple second translucent elements, the multiple second light transmission member
Part is arranged at intervals and is overlapped in the multiple opening, and the extinction element ring is around described in the multiple second translucent element and cladding
The side wall of multiple second translucent elements, wherein the refractive index of the multiple second translucent element is respectively greater than 1.
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 the aperture of each the multiple opening and institute
The height ratio for stating the first translucent element is fallen in the range of 2 to 20.
6. biometric recognition device.It according to claim 1, which is characterized in that the folding of the multiple second translucent element
In the range of the rate of penetrating respectively falls in 1.3 to 1.7, and the width of the multiple second translucent element with height than respectively fall in 2 to
In the range of 20.
7. biometric recognition device.It according to claim 1, which is characterized in that the light-absorption layer is also disposed at described
In the side wall surface of one translucent element.
8. 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.
9. 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.
10. biometric recognition device.It according to claim 9, which is characterized in that second collimator includes multiple
Prism, 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 |
|---|---|---|---|
| CN201611206312.3A CN108241823A (en) | 2016-12-23 | 2016-12-23 | Biometric recognition device.It |
| TW106102518A TW201824067A (en) | 2016-12-23 | 2017-01-24 | Biological feature identification device |
| PCT/CN2017/078487 WO2018113124A1 (en) | 2016-12-23 | 2017-03-29 | Biometric identification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611206312.3A CN108241823A (en) | 2016-12-23 | 2016-12-23 | Biometric recognition device.It |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108241823A true CN108241823A (en) | 2018-07-03 |
Family
ID=62624627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611206312.3A Pending CN108241823A (en) | 2016-12-23 | 2016-12-23 | Biometric recognition device.It |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN108241823A (en) |
| TW (1) | TW201824067A (en) |
| WO (1) | WO2018113124A1 (en) |
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| CN108960208A (en) * | 2018-08-09 | 2018-12-07 | 京东方科技集团股份有限公司 | light collimating structure and its manufacturing method and optical fingerprint identification device |
| CN111435195A (en) * | 2019-01-11 | 2020-07-21 | 蔡宏斌 | Near-eye display structure |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2018113124A1 (en) | 2018-06-28 |
| TW201824067A (en) | 2018-07-01 |
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Application publication date: 20180703 |