CN105046240B - The manufacturing method of finger print detection device - Google Patents
The manufacturing method of finger print detection device Download PDFInfo
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- CN105046240B CN105046240B CN201510510980.4A CN201510510980A CN105046240B CN 105046240 B CN105046240 B CN 105046240B CN 201510510980 A CN201510510980 A CN 201510510980A CN 105046240 B CN105046240 B CN 105046240B
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- finger
- fingerprint sensor
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- 238000001514 detection method Methods 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 230000003287 optical effect Effects 0.000 claims abstract description 137
- 230000008054 signal transmission Effects 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 16
- 238000005516 engineering process Methods 0.000 claims description 8
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- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 241000218202 Coptis Species 0.000 claims description 4
- 235000002991 Coptis groenlandica Nutrition 0.000 claims description 4
- 239000005022 packaging material Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 238000010009 beating Methods 0.000 claims description 2
- 239000004593 Epoxy Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 239000008280 blood Substances 0.000 description 19
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- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229920006336 epoxy molding compound Polymers 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
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- 210000003361 heart septum Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
-
- 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
- G06V40/1382—Detecting the live character of the finger, i.e. distinguishing from a fake or cadaver finger
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
- H01L2224/732—Location after the connecting process
- H01L2224/73251—Location after the connecting process on different surfaces
- H01L2224/73265—Layer and wire connectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Optics & Photonics (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Image Input (AREA)
Abstract
The present invention relates to a kind of manufacturing methods of finger print detection device.The manufacturing method of the finger print detection device includes the following steps：By fingerprint sensor and circuit board electrical connection, fingerprint sensor is used to acquire the fingerprint pattern of the finger of person to be verified；By light source module and OPTICAL SENSORS respectively with circuit board electrical connection, obtain finger print detection device, light source module can send out optical signal, OPTICAL SENSORS can receive the optical signal of the finger reflection of person to be verified, and it can be by the optical signal transmission reflected by finger to processor, fingerprint pattern can be transferred to processor by fingerprint sensor, the optical signal reflected by finger can be converted into pulse signal by processor, processor can determine whether that startup fingerprint sensor, processor can also determine the identity of person to be verified according to fingerprint pattern according to the pulse signal.The finger print detection device of above method manufacture can realize the fingerprint recognition to live finger so that it is more safe and reliable that finger print detection device verifies identity.
Description
Technical field
The present invention relates to touch screen fields, more particularly to a kind of manufacturing method of finger print detection device.
Background technology
The conventional fingerprint identification device of the prior art only identifies fingerprint pattern to be measured, with the fingerprint pattern that is recorded in system into
Row compares, if it is determined that unanimously then judging that the fingerprint pattern is verified.Currently, occurring special imitation fingerprint film skill in the market
Art can replicate fingerprint, because fingerprint and the subject of duplication refer to by replicating the fingerprint pattern of subject on similar silica gel material
Line is identical, equally can also obtain being verified for conventional fingerprint identification device, this allows for originally intending using somatic fingerprint only
The safety that the characteristics of one property carries out authentication cannot be guaranteed.
Invention content
Based on this, it is necessary to provide a kind of manufacturing method of finger print detection device, which can produce and be used for
Identify the finger print detection device of living body finger print so that fingerprint authentication identity is more safe and reliable.
A kind of manufacturing method of finger print detection device, includes the following steps：
By fingerprint sensor and circuit board electrical connection, wherein the circuit board is electrically connected with processor, and the fingerprint passes
Sense chip is used to acquire the fingerprint pattern of the finger of person to be verified；And
By light source module and OPTICAL SENSORS respectively with the circuit board electrical connection, finger print detection device is obtained, wherein described
Light source module can send out optical signal, and the OPTICAL SENSORS can receive the optical signal of the finger reflection of the person to be verified, and can incite somebody to action
The optical signal transmission reflected by the finger to the processor, the fingerprint sensor can pass the fingerprint pattern
It is defeated by the processor, the optical signal reflected by the finger can be converted into pulse signal, the place by the processor
Managing device can determine whether to start the fingerprint sensor according to the pulse signal, and the processor can also be according to the fingerprint
Pattern determines the identity of the person to be verified.
It is specially by the fingerprint sensor and the step of circuit board electrical connection in one of the embodiments,：
Electrically-conductive backing plate is provided, the fingerprint sensor is installed on the electrically-conductive backing plate, and by the fingerprint sensing
Chip is electrically connected with the electrically-conductive backing plate；
The electrically-conductive backing plate is installed on the circuit board, and makes the electrically-conductive backing plate and the circuit board electrical connection.
In one of the embodiments, by the light source module and the OPTICAL SENSORS respectively with the circuit board electrical connection
The step of be specially：
Outline border is provided, the outline border has spaced first host cavity, the second host cavity and third host cavity, described
Offered on outline border the handle hole communicated with first host cavity, extraneous and described second host cavity of connection go out optical channel,
And connection is extraneous and the third host cavity enters optical channel；
The light source module and the OPTICAL SENSORS are respectively arranged at second host cavity and the third host cavity
In, and make optical signal that the light source module sends out can from it is described go out optical channel project, the optical signal reflected by the finger can
Into it is described enter optical channel；
The outline border is installed on the circuit board, and by the light source module and the OPTICAL SENSORS respectively with it is described
Circuit board electrical connection, and the fingerprint sensor and the electrically-conductive backing plate is made to be contained in first host cavity, wherein
The position of the handle hole is corresponding with the position of the fingerprint sensor.
The outline border is installed on the circuit board in one of the embodiments, and by the light source module and institute
State OPTICAL SENSORS respectively with the step of the circuit board electrical connection after, further include in the outline border and the fingerprint sensor
Between fill encapsulating material, and the encapsulating material and the electrically-conductive backing plate is made to cooperatively form the receiving fingerprint sensing jointly
4th host cavity of chip.
The encapsulating material is epoxy-plastic packaging material in one of the embodiments,.
The outline border is installed to before the step on the circuit board in one of the embodiments, further includes in institute
It states and fills underfill in outline border, and the underfill is made to be distributed in the electrically-conductive backing plate far from the fingerprint sensing core
In the one side of piece.
The fingerprint sensor is being installed in the step on the electrically-conductive backing plate in one of the embodiments,
The fingerprint sensor is pasted on the electrically-conductive backing plate using adhesive glue.
The electrically-conductive backing plate is installed in the step on the circuit board in one of the embodiments, using contact
The electrically-conductive backing plate is installed on the circuit board by array package technology or ball-like pins Background Grid array packages technology.
In the step of fingerprint sensor is electrically connected with the electrically-conductive backing plate in one of the embodiments, lead to
Dozen gold thread is crossed to be electrically connected the fingerprint sensor with the electrically-conductive backing plate.
The fingerprint sensor is capacitance type fingerprint sensing chip in one of the embodiments,.
The manufacturing method of above-mentioned finger print detection device is simple, is easy to industrialized production, and the system of above-mentioned finger print detection device
Make method manufacture in the identity for verifying person to be verified, the optical signal that light source module is sent out is anti-by the finger of person to be verified
It is received by OPTICAL SENSORS after penetrating, OPTICAL SENSORS can be by the optical signal transmission to processor, and processor is reflected according to this by finger
Optical signal be converted into pulse signal, processor is by the pulse signal of converting out optical signal with the finger of determination person to be verified
Whether it is live finger, and whether is live finger to determine whether to start fingerprint sensor according to the finger of person to be verified,
When the pulse signal that optical signal is converted out is live body pulse signal, processor starts fingerprint sensor, fingerprint sensor
It acquires the fingerprint pattern of person's finger to be verified, and the fingerprint pattern of acquisition is transferred to processor, processor is according to the finger of acquisition
Line pattern determines the identity of person to be verified, to realize the fingerprint recognition to live finger so that above-mentioned finger print detection device is used for
It is more safe and reliable to verify identity.
Description of the drawings
Fig. 1 is the flow chart of the manufacturing method of the finger print detection device of an embodiment；
Fig. 2 is the flow chart of the realization step S110 of the manufacturing method of finger print detection device shown in FIG. 1；
Fig. 3 is the flow chart of the realization step S120 of the manufacturing method of finger print detection device shown in FIG. 1；
Fig. 4 be finger print detection device shown in FIG. 1 manufacturing method step S120 in be equipped with light source module and light
The structural schematic diagram of the outline border of sensor；
Fig. 5 is the structural schematic diagram of another angle of the outline border shown in Fig. 4 equipped with light source module and OPTICAL SENSORS；
Fig. 6 is sectional views of the Fig. 4 along line A-A；
Fig. 7 is sectional views of the Fig. 4 along line B-B；
Fig. 8 is that a kind of structure for finger print detection device that the manufacturing method of finger print detection device shown in FIG. 1 produces is shown
It is intended to；
Fig. 9 is processor, electrically-conductive backing plate, light source module and the OPTICAL SENSORS of finger print detection device shown in Fig. 8, fingerprint biography
The circuit of sense chip and circuit board connects block diagram.
Specific implementation mode
To facilitate the understanding of the present invention, below with reference to relevant drawings to invention is more fully described.In attached drawing
Give the preferred embodiment of the present invention.But the present invention can realize in many different forms, however it is not limited to herein
Described embodiment.Keep the understanding to the disclosure more saturating on the contrary, purpose of providing these embodiments is
It is thorough comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the present invention
The normally understood meaning of technical staff is identical.Used term is intended merely to description tool in the description of the invention herein
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the Listed Items of pass.
As shown in Figure 1, the manufacturing method of the finger print detection device of an embodiment, includes the following steps：
Step S110：By fingerprint sensor and circuit board electrical connection.
Wherein, circuit board is electrically connected with processor.
Wherein, circuit board can be rigid circuit board, flexible PCB or Rigid Flex.In the present embodiment, circuit
Plate is flexible PCB (FPC).
Wherein, processor is used for processing, conversion and the processing of data of signal.Processor prestores the fingerprint image of human body
The pulse signal of case and human body.Pulse signal refers to the pulsation frequency range of normal living person herein.
Wherein, fingerprint sensor is used to acquire the fingerprint pattern of the finger of person to be verified.Wherein, fingerprint sensor is
Capacitance type fingerprint sensing chip.Wherein, capacitance type fingerprint sensing chip is to be integrated with multiple semiconductor devices on a kind of " tablet "
Fingerprint sensor.Its principle is：Human finger is attached on " tablet " and constitutes the another side of capacitance with it, due to finger flat
Uneven, the actual range that " tablet " is contacted at concave point and at salient point is in different size, and the capacitance values of formation are also different,
Judged " ridge " according to the difference of " ridge " and " paddy " of finger print and the capacitance size of semicoductor capacitor induction particle formation
The acquisition to finger fingerprint pattern is realized in the position of " paddy ".Its specific work process is by the electricity on each pixel
Hold induction particle and be pre-charged to a certain reference voltage, when finger touches on capacitance type fingerprint sensing chip, because of " ridge "
It is raised, " paddy " is concave, according to the relationship of capacitance and distance, can form different capacitances at " ridge " and at " paddy "
Value, is then discharged using discharge current, because " ridge " is different with the capacitance corresponding to " paddy ", the speed of electric discharge
Also different, pixel (capacitance is high) electric discharge under " ridge " is slower, and pixel (capacitance the is low) electric discharge being under " paddy " is very fast.Hand
Refer to and come bigger than " paddy " by the capacitance that at the surface of capacitance type fingerprint sensing chip, " ridge " of fingerprint is formed, utilizes this
The charge and discharge process of capacitor array, just can obtain the data image signal of fingerprint.
Also referring to Fig. 2, specifically, being specially by fingerprint sensor and the step of circuit board electrical connection：
Step S112：Electrically-conductive backing plate is provided, fingerprint sensor is installed on electrically-conductive backing plate, and by fingerprint sensor
It is electrically connected with electrically-conductive backing plate.
Specifically, fingerprint sensor to be installed in the step on electrically-conductive backing plate, using adhesive glue by fingerprint sensing
Chip is pasted on electrically-conductive backing plate.Wherein, adhesive glue is double faced adhesive tape, for example, DAF (Die Attached Film) film.
Wherein, in the step of fingerprint sensor being electrically connected with electrically-conductive backing plate, by beating gold thread by fingerprint sensor
It is electrically connected with electrically-conductive backing plate.
Step S114：Electrically-conductive backing plate is installed on circuit board, and makes electrically-conductive backing plate and circuit board electrical connection.
Specifically, electrically-conductive backing plate is installed in the step on circuit board, using land grid array technology (Land
Grid Array, LGA) or ball-like pins Background Grid array packages technology (Ball Grid Array, BGA) electrically-conductive backing plate is installed
In on circuit board.
Specifically, electrically-conductive backing plate is laminated on circuit board.And fingerprint sensor is set to electrically-conductive backing plate far from circuit board
Side.
Step S120：By light source module and OPTICAL SENSORS respectively with circuit board electrical connection, finger print detection device is obtained.
Wherein, light source module can send out optical signal, and OPTICAL SENSORS can receive the optical signal of the finger reflection of person to be verified, and
It can be by the optical signal transmission reflected by finger to processor；The optical signal reflected by finger can be converted into pulse letter by processor
Number, processor can determine whether to start fingerprint sensor according to pulse signal, and processor can also be determined according to fingerprint pattern and be waited for
The identity of verifier.
Specifically, light source module includes green-light source.Due to when feux rouges or Infrared irradiation to blood, blood can will
Most feux rouges or infrared light reflection, and when green light exposes to blood, blood can by the absorption of most of green light, to
It can be converted into pulse signal according to the light quantity difference of blood absorption green light or reflection feux rouges.Therefore, light source module also further includes red
At least one of radiant and infrared light light source.I.e. light source module can be green-light source module；Or light source module is red
The mixing light source module that at least one of radiant and infrared light light source are formed with green-light source.
Also referring to Fig. 3, specifically, by light source module and OPTICAL SENSORS respectively with circuit board electrical connection the step of it is specific
For：
Step S122：Outline border is provided, outline border has spaced first host cavity, the second host cavity and third receiving
Chamber, offers that the handle hole communicated with the first host cavity, connection be extraneous on outline border and the second host cavity goes out optical channel and connection
It is extraneous and third host cavity to enter optical channel.
Wherein, outline border can be square frame, round framework or oval framework etc..
Further, the material of outline border can be material commonly used in the art.For example, outline border can be ceramic outline border or gold
Belong to outline border.
In the present embodiment, there is outline border operating surface, handle hole to extend to operating surface, light extraction from the side wall of the first host cavity
Channel extends to operating surface from the side wall of the second host cavity, enters optical channel and extends to operating surface from the side wall of third host cavity.I.e.
Handle hole, the light-emitting window for going out optical channel and the light inlet for entering optical channel are respectively positioned on the same side of outline border.
Step S124：Light source module and OPTICAL SENSORS are respectively arranged in the second host cavity and third host cavity, and made
The optical signal that light source module is sent out can be projected from optical channel is gone out, and can be entered into optical channel by the optical signal that finger reflects.
Wherein, it is received by OPTICAL SENSORS for the ease of the optical signal that light source module is sent out, goes out optical channel and extend along a straight line,
Enter optical channel along a straight line to extend, goes out optical channel and enter optical channel and be located at the distance between the opening of operating surface to be less than optical channel
Opening on the side wall of the second host cavity and enter the distance between the opening that optical channel is located on the side wall of third host cavity.
Specifically, the light receiving surface direction of OPTICAL SENSORS enters optical channel, in order to the reception of optical signal.
It is appreciated that in other embodiments, the extending direction for going out optical channel and the extending direction for entering optical channel can also
It is parallel, at this point, the distance between light source module and OPTICAL SENSORS need to be shortened, in other words, by the second host cavity close to third
Host cavity is arranged.
Wherein, OPTICAL SENSORS is photodiode (Photo-Diode, PD).
Wherein, OPTICAL SENSORS is multiple, and light source module corresponds to multiple, one light source module of each OPTICAL SENSORS correspondence.
At this point, the second host cavity, third host cavity, going out optical channel and entering optical channel to correspond to respectively multiple, light source module corresponds to
One the second host cavity and one go out optical channel, and an OPTICAL SENSORS corresponds to a third host cavity and one enters optical channel, and
Multiple third host cavities are arranged around the first host cavity.It is appreciated that OPTICAL SENSORS may be one, at this point, light source module
Also it is one.
As shown in Fig. 4,5, Fig. 6 and Fig. 7, in the illustrated embodiment, outline border 210 is square frame.Outline border 210 has the
One host cavity 212 second host cavity 213, third host cavity 214, handle hole 215, goes out optical channel 216, enters optical channel 217 and grasp
Make face 218.Wherein, handle hole 215 is connected to the first host cavity 212, and handle hole 215 prolongs from the side wall of the first host cavity 212
Reach operating surface 218；Go out optical channel 216 and be connected to extraneous and the second host cavity 213, and goes out optical channel 216 from the second host cavity 213
Side wall extend to operating surface 218；Enter optical channel 217 be connected to it is extraneous be connected to third host cavity 214, and enter optical channel 217 from
The side wall of third host cavity 214 extends to operating surface 218.Wherein, go out optical channel 216 along a straight line to extend, enter 217 edge of optical channel
One linear extension.And go out optical channel 216 and enter optical channel 217 be located at the distance between opening of operating surface 218 less than light extraction lead to
Road 216 is located at the opening on the side wall of the second host cavity 213 and enters optical channel 217 and is located on the side wall of third host cavity 214
The distance between opening.Wherein, light source module 220 is contained in the second host cavity 213, and OPTICAL SENSORS 230 is contained in third receipts
In vessel 214.Light source module 220 passes through the first conducting wire 225 and circuit board electrical connection；OPTICAL SENSORS 230 passes through the second conducting wire 235
With circuit board electrical connection.
In the illustrated embodiment, the second host cavity 213 and third host cavity 214 are two, two the second host cavities
213 are set to the both sides of the first host cavity 212, and it is two to go out optical channel 216 and enter optical channel 217 also, and one goes out optical channel
216 correspond to second host cavity 213, and one enters optical channel 217 and corresponds to a third host cavity 214.OPTICAL SENSORS 230 and light
Source module 220 corresponds to two, and a light source module 220 corresponds to an OPTICAL SENSORS 230, and an OPTICAL SENSORS 230 corresponds to one
A third host cavity 214, a light source module 220 correspond to second host cavity 213.It is appreciated that OPTICAL SENSORS 230 and light
Source module 220 can also be one, three or more.
Step S126：Outline border is installed on circuit board, and light source module and OPTICAL SENSORS are electrically connected with circuit board respectively
It connects, and fingerprint sensor and electrically-conductive backing plate is made to be contained in the first host cavity, wherein the position of handle hole and fingerprint sensing
The position of chip is corresponding.
In the present embodiment, outline border is installed on circuit board, and by light source module and OPTICAL SENSORS respectively with circuit board
Further include encapsulating material being filled between outline border and fingerprint sensor, and make encapsulating material and lead after the step of electrical connection
Electric substrate cooperatively forms the 4th host cavity of a receiving fingerprint sensor jointly.
Wherein, encapsulating material can be epoxy-plastic packaging material (Epoxy Molding Compound, EMC).In framework and refer to
Encapsulating material is filled between line sensing chip to play the role of vacuum sealing to fingerprint sensor, ensure it not by extraneous ring
Border is corroded.
It is appreciated that the step of filling encapsulating material between outline border and fingerprint sensor can be omitted, in other realities
It applies in example, without filling encapsulating material between outline border and fingerprint sensor.Alternatively, outline border can also omit, at this point, directly will
Light source module and OPTICAL SENSORS installation are on circuit boards.
In the present embodiment, further include filling bottom in outline border to fill out before outline border being installed to the step on circuit board
Glue (Underfill glue) is filled, and underfill is made to be distributed in one side of the electrically-conductive backing plate far from fingerprint sensor.
The step of being appreciated that in other embodiments, underfill is filled in outline border can also omit.
In the present embodiment, further include resistance, the elements such as capacitance being installed on circuit boards and installation is used for and miscellaneous equipment
The connector of signal transmission.
Fig. 8 is a kind of finger print detection device being prepared according to above-mentioned manufacturing method.Wherein, outline border 210 is mounted on electricity
On road plate 240, electrically-conductive backing plate 250 and fingerprint sensor 260 are contained in the first host cavity 212, and are stacked gradually in circuit
On plate 240, and the position of fingerprint sensor 260 is corresponding with the position of handle hole 215.Electrically-conductive backing plate 250 passes through scolding tin 255
It is connected on circuit board 240, and is filled with underfill 270 between electrically-conductive backing plate 250 and circuit board 240.Fingerprint sensing core
Piece 260 is bonded together by adhesive glue 280 and electrically-conductive backing plate 250, and fingerprint sensor 260 passes through gold thread 265 and conduction
Substrate 250 is electrically connected.Encapsulating material 290 cooperatively forms the 4th receipts of receiving fingerprint sensor 260 with electrically-conductive backing plate 250 jointly
Vessel 300.The elements such as capacitance, resistance 310 and connector 320 are also equipped on circuit board 240.
Fig. 9 is that the circuit for the finger print detection device being prepared according to above-mentioned manufacturing method connects block diagram, wherein processor
330, electrically-conductive backing plate 250, light source module 220 and OPTICAL SENSORS 230 are electrically connected with circuit board 240, fingerprint sensor 260 with
Electrically-conductive backing plate 250 is electrically connected.
Wherein, the work tool for the fingerprint sensing device identification living body finger print that prepared by the manufacturing method of above-mentioned finger print detection device
Body is as follows：
When the finger of person to be verified is located at handle hole 215, optical signal that light source module 220 is sent out is from going out optical channel
216 project, and encounter finger and are reflected later, are connect by OPTICAL SENSORS 230 after entering optical channel 217 by the optical signal that finger reflects
It receives, the light that OPTICAL SENSORS 230 will be reflected the optical signal transmission by finger reflection to processor 330, processor 330 by finger
Signal is converted into pulse signal after being converted to electric signal, and judges whether the pulse signal matches with the pulse signal of human body,
And then judge finger whether be live body finger；
When processor 330 judges that the pulse signal that optical signal is converted to and the pulse signal of the human body to prestore match
When, and the finger of person to be verified presses on 260 top of fingerprint sensor by handle hole 215, fingerprint sensor 260 acquires
The fingerprint pattern of finger, and fingerprint pattern is transferred to processor 330, processor 330 transmits fingerprint sensor 260
Fingerprint pattern matched with pre-stored fingerprint pattern, judge fingerprint pattern that fingerprint sensor 260 transmits and prestore
The fingerprint pattern of human body whether match；
When processor 330 judges the fingerprint of the fingerprint pattern that fingerprint sensor 260 transmits and the human body to prestore
When pattern matches, person to be verified passes through authentication.
Wherein, the optical signal reflected by finger is converted to the principle that pulse signal is converted into after electric signal by processor 330
It is specific as follows：
When light source module 220 is green-light source module, due in the heartbeat of human body, the blood of the microcapillary of finger
Flow quantity can increase, and the green light of absorption can also increase, and in the cardiac septum phase of human body, the blood of the microcapillary of finger can be reduced,
The green light of absorption can also be reduced therewith, and processor 330 is calculated by the front and back green light total amount light quantity difference of finger reflection, and is converted into
Pulse signal.
When light source module 220 is the mixing light source module of green-light source and red-light source composition, green-light source and feux rouges
Light source emits optical signal to human finger simultaneously, and when heartbeat, flowing through the blood of the capilary in finger can increase, blood
The green light of absorption can increase, and the feux rouges of reflection can also increase；Heartbeat interval flows through the blood meeting of the capilary in finger
It reduces, the green light of blood absorption can be reduced, and the feux rouges of reflection can also be reduced.Due to being sent out simultaneously using green-light source and red-light source
Optical signal is penetrated, the light total amount of transmitting is larger, and light total amount of the transmitting to human finger surface back reflection to 230 surface of OPTICAL SENSORS is still
So larger, the light quantity difference error before and after reflecting is smaller, and processor 330 calculates the front and back total amount light quantity difference of reflection, and is converted into
Pulse signal.
When light source module 220 is the mixing light source module that green-light source and infrared light light source form, green-light source and red
Outer radiant emits optical signal to human finger simultaneously, and when heartbeat, flowing through the blood of the capilary in finger can increase,
The green light of blood absorption can increase, and the infrared light of reflection can also increase；Heartbeat interval flows through the capilary in finger
Blood can be reduced, and the green light of blood absorption can be reduced, and the infrared light of reflection can also be reduced.Due to using green-light source and red simultaneously
Outer radiant emits optical signal, and the light total amount of transmitting is larger, transmitting to human finger surface back reflection to 230 surface of OPTICAL SENSORS
Light total amount it is still larger, reflect that front and back light quantity difference error is smaller, processor 330 calculates the front and back total amount light quantity of reflection
Difference, and it is converted into pulse signal.
When light source module 220 is the mixing light source module of green-light source, red-light source and infrared light light source composition, green light
Light source, red-light source and infrared light light source flow through micro- in finger to human finger transmitting optical signal when heartbeat simultaneously
The blood of blood vessel can increase, and the green light of blood absorption can increase, and the feux rouges and infrared light of reflection can also increase；Heartbeat interval
Phase, flowing through the blood of the capilary in finger can be reduced, and the green light of blood absorption can be reduced, and the feux rouges and infrared light of reflection also can
It reduces.Due to emitting optical signal using green-light source, red-light source and infrared light light source simultaneously, the light total amount of transmitting is larger, hair
The light total amount for being incident upon human finger surface back reflection to 230 surface of OPTICAL SENSORS is still larger, reflects front and back light quantity difference error
Smaller, processor 330 calculates the front and back total amount light quantity difference of reflection, and is converted into pulse signal.
The manufacturing method of above-mentioned finger print detection device is simple, is easy to industrialized production, and the system of above-mentioned finger print detection device
Make method manufacture in the identity for verifying person to be verified, the optical signal that light source module is sent out is anti-by the finger of person to be verified
It is received by OPTICAL SENSORS after penetrating, OPTICAL SENSORS can be by the optical signal transmission to processor, and processor is reflected according to this by finger
Optical signal be converted into pulse signal, processor is by the pulse signal of converting out optical signal with the finger of determination person to be verified
Whether it is live finger, and whether is live finger to determine whether to start fingerprint sensor according to the finger of person to be verified,
When the pulse signal that optical signal is converted out is live body pulse signal, processor starts fingerprint sensor, fingerprint sensor
It acquires the fingerprint pattern of person's finger to be verified, and the fingerprint pattern of acquisition is transferred to processor, processor is according to the finger of acquisition
Line pattern determines the identity of person to be verified, to realize the fingerprint recognition to live finger so that above-mentioned finger print detection device is used for
It is more safe and reliable to verify identity.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (8)
1. a kind of manufacturing method of finger print detection device, which is characterized in that include the following steps：
By fingerprint sensor and circuit board electrical connection, wherein the circuit board is electrically connected with processor, the fingerprint sensing core
Piece is used to acquire the fingerprint pattern of the finger of person to be verified；And
By light source module and OPTICAL SENSORS respectively with the circuit board electrical connection, finger print detection device is obtained, wherein the light source
Module can send out optical signal, and the OPTICAL SENSORS can receive the optical signal of the finger reflection of the person to be verified, and can will be by institute
The optical signal transmission of finger reflection is stated to the processor, the fingerprint pattern can be transferred to by the fingerprint sensor
The optical signal reflected by the finger can be converted into pulse signal, the processor by the processor, the processor
It can be determined whether to start the fingerprint sensor according to the pulse signal, the processor can also be according to the fingerprint pattern
Determine the identity of the person to be verified；
Wherein, it is specially by the fingerprint sensor and the step of circuit board electrical connection：
Electrically-conductive backing plate is provided, the fingerprint sensor is installed on the electrically-conductive backing plate, and by the fingerprint sensor
It is electrically connected with the electrically-conductive backing plate；
The electrically-conductive backing plate is installed on the circuit board, and makes the electrically-conductive backing plate and the circuit board electrical connection；
It is specially with the step of circuit board electrical connection respectively by the light source module and the OPTICAL SENSORS：
Outline border is provided, the outline border has spaced first host cavity, the second host cavity and third host cavity, the outline border
On offer the handle hole communicated with first host cavity, extraneous and described second host cavity of connection goes out optical channel and even
The logical external world enters optical channel with the third host cavity；
The light source module and the OPTICAL SENSORS are respectively arranged in second host cavity and the third host cavity, and
Make optical signal that the light source module sends out can from it is described go out optical channel project, the optical signal reflected by the finger can enter institute
It states into optical channel；
The outline border is installed on the circuit board, and by the light source module and the OPTICAL SENSORS respectively with the circuit
Plate is electrically connected, and the fingerprint sensor and the electrically-conductive backing plate is made to be contained in first host cavity, wherein described
The position of handle hole is corresponding with the position of the fingerprint sensor.
2. the manufacturing method of finger print detection device according to claim 1, which is characterized in that the outline border is installed to institute
State on circuit board, and by the light source module and the OPTICAL SENSORS respectively with the step of the circuit board electrical connection after, also
It is included between the outline border and the fingerprint sensor and fills encapsulating material, and makes the encapsulating material and the conductive base
Plate cooperatively forms the 4th host cavity of the receiving fingerprint sensor jointly.
3. the manufacturing method of finger print detection device according to claim 2, which is characterized in that the encapsulating material is epoxy
Plastic packaging material.
4. the manufacturing method of finger print detection device according to claim 1, which is characterized in that the outline border is installed to institute
Further include underfill being filled in the outline border, and the underfill is made to be distributed before stating the step on circuit board
In one side of the electrically-conductive backing plate far from the fingerprint sensor.
5. the manufacturing method of finger print detection device according to claim 1, which is characterized in that by the fingerprint sensing core
Piece is installed in the step on the electrically-conductive backing plate, and the fingerprint sensor is pasted on the electrically-conductive backing plate using adhesive glue
On.
6. the manufacturing method of finger print detection device according to claim 1, which is characterized in that install the electrically-conductive backing plate
In the step on the circuit board, led described using land grid array technology or ball-like pins Background Grid array packages technology
Electric substrate is installed on the circuit board.
7. the manufacturing method of finger print detection device according to claim 1, which is characterized in that by the fingerprint sensor
In the step of being electrically connected with the electrically-conductive backing plate, the fingerprint sensor and the electrically-conductive backing plate are electrically connected by beating gold thread
It connects.
8. the manufacturing method of finger print detection device according to claim 1, which is characterized in that the fingerprint sensor is
Capacitance type fingerprint sensing chip.
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| CN105069438B (en) * | 2015-08-19 | 2019-03-12 | 南昌欧菲生物识别技术有限公司 | The manufacturing method of finger print detection device |
| CN105205446B (en) * | 2015-08-19 | 2019-03-12 | 南昌欧菲生物识别技术有限公司 | Finger print detection device |
| CN106778459B (en) | 2015-12-31 | 2021-02-12 | 深圳市汇顶科技股份有限公司 | Fingerprint identification method and fingerprint identification device |
| CN106709413B (en) | 2015-12-31 | 2020-12-08 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and mobile terminal |
| CN105930704A (en) * | 2016-04-01 | 2016-09-07 | 乐视控股（北京）有限公司 | Fingerprint identification method and apparatus, and intelligent terminal |
| CN108205648A (en) * | 2016-12-20 | 2018-06-26 | 南昌欧菲生物识别技术有限公司 | Fingerprint recognition module and electronic device |
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| CN203858644U (en) * | 2014-03-26 | 2014-10-01 | 映智科技股份有限公司 | Fingerprint sensing device with anti-counterfeiting function |
| CN203982403U (en) * | 2014-07-03 | 2014-12-03 | 力传扬股份有限公司 | The sensor that living body finger print detects |
| CN104239869A (en) * | 2014-09-25 | 2014-12-24 | 武汉华和机电技术有限公司 | Intelligent fingerprint identification device and device |
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| CN203858644U (en) * | 2014-03-26 | 2014-10-01 | 映智科技股份有限公司 | Fingerprint sensing device with anti-counterfeiting function |
| CN203982403U (en) * | 2014-07-03 | 2014-12-03 | 力传扬股份有限公司 | The sensor that living body finger print detects |
| CN104239869A (en) * | 2014-09-25 | 2014-12-24 | 武汉华和机电技术有限公司 | Intelligent fingerprint identification device and device |
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