CN109739796A - Fingerprint recognition component, terminal device, image data transfer method and device - Google Patents
Fingerprint recognition component, terminal device, image data transfer method and device Download PDFInfo
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Abstract
The present invention provides a kind of fingerprint recognition component, terminal device, image data transfer method and devices, wherein the fingerprint recognition component, comprising: fingerprint sensor, for acquiring fingerprint image；Interface module is connected with the fingerprint sensor, for the fingerprint image to be sent to host by the channel that physical layer gates.It solves the problems, such as that the efficiency of transmission in the presence of existing fingerprint image data transmission process is low through the above scheme, has reached effective promotion finger print data efficiency of transmission, promoted the technical effect of recognition performance.
Description
Technical field
The present invention relates to sensor technical field, in particular to a kind of fingerprint recognition component, terminal device, image data pass
Transmission method and device.
Background technique
Fingerprint recognition is that have the characteristics that uniqueness and invariance according to everyone fingerprint characteristic, carries out identification
A kind of technology.The cost of fingerprint recognition is relatively low, and the structure of fingerprint sensor is relatively easy, and discrimination is high, is biological special
A kind of relatively broad identity recognizing technology is used in sign identification.
Fingerprint recognition is applied on intelligent terminal, is provided great convenience for the identification of intelligent terminal.With
Intelligent terminal develops towards large-size screen monitors, and end panel is arranged in by the way of stealthy in fingerprint sensor by more and more intelligent terminals
The lower section of curtain.
The working principle of fingerprint sensor is that finger print data is sent to terminal device after collecting finger print data
Host, host are compared by preset algorithm, to carry out the identification of user identity.It can be seen that fingerprint sensor with
It needs to carry out data communication between host, currently, generally by I2C interface or SPI interface between fingerprint sensor and host
Carry out data communication.
However, I2C (bidirectional two-line synchronous serial bus) interface and SPI (Serial Peripheral
Interface, Serial Peripheral Interface (SPI)) interface transmission rate it is all relatively low, with fingerprint sensor sensing region setting more
Big size will definitely increase the data volume of fingerprint sensor acquisition in this way, and data volume increases exponentially, with data volume
Be continuously increased, pass through I2C interface and SPI interface and carry out data communication between fingerprint sensor and host, data transmission effect
Rate is lower, is difficult to meet the recognition performance of fingerprint recognition.
In view of the above-mentioned problems, currently no effective solution has been proposed.
Summary of the invention
The embodiment of the invention provides a kind of fingerprint recognition component, terminal device, image data transfer method and device, with
Reach and promote finger print data efficiency of transmission, promotes the purpose of recognition performance.
On the one hand, a kind of fingerprint recognition component is provided, comprising:
Fingerprint sensor, for acquiring fingerprint image；
Interface module is connected with the fingerprint sensor, the channel for gating the fingerprint image by physical layer
It is sent to host.
In one embodiment, the interface module includes:
Register, for receiving the control instruction of the host；
System control module is connected with the register, is used for according to the control instruction to data processing module and object
Reason layer transmission module is controlled；
Data processing module is connected with the system control module, will for the control according to the system control module
The fingerprint image is converted to the data packet for meeting preset protocol；
Physical layer transmission module passes through with the data processing module for the control according to the system control module
The data packet for meeting preset protocol is converted to analog signal and is sent to the host by the channel parallel of gating.
In one embodiment, it is gateable logical that two or more are provided in the physical layer transmission module
Road.
In one embodiment, the interface module is MIPI interface module.
In one embodiment, above-mentioned fingerprint recognition component further include: fifo module, with the fingerprint sensor and institute
It states interface module to be connected, the finger print data cross clock domain for obtaining the fingerprint sensor is sent to the interface module.
On the other hand, a kind of terminal device is provided, comprising:
Touch screen, wherein above-mentioned fingerprint recognition component is provided with below the touch screen；
Host is connected with the fingerprint recognition component, for receiving the fingerprint image of the fingerprint recognition component transmission, and
The fingerprint image is identified.
In one embodiment, above-mentioned terminal device further include: control instruction transmission module, with the host and described
Interface module in fingerprint recognition component is connected, for the control instruction of the host to be sent to the interface module.
In one embodiment, the control instruction transmission module includes: I2C interface module and/or SPI interface mould
Block.
Another aspect provides a kind of image data transfer method, comprising:
Acquire fingerprint image；
By the multiple channels gated in interface module, the fingerprint image is passed in parallel to host.
In one embodiment, by multiple channels of the middle gating of interface module, the fingerprint image is passed parallel
It send to host, comprising:
The fingerprint image is split as to the data packet of multiple predetermined bit positions；
According to preset protocol by the data packet of the multiple predetermined bit position, it is encapsulated as multiple protocol packages；
The multiple protocol package Parallel transformation is mould by the multiple channels gated in the physical layer by the interface module
Quasi- signal, and it is sent to the host.
In one embodiment, the data packet of the multiple predetermined bit quantity is encapsulated as more according to preset protocol
A protocol package, comprising:
Check information is added for each protocol package in the multiple protocol package.
It in one embodiment, is analog signal by the multiple protocol package Parallel transformation, comprising:
It is simulation LVDS signal by the multiple protocol package Parallel transformation.
Another aspect provides a kind of image data transmitting device, comprising:
Acquisition module, for acquiring fingerprint image；
By the multiple channels gated in interface module, the fingerprint image is passed in parallel to host.
In one embodiment, above-mentioned delivery module includes:
Split cells, for the fingerprint image to be split as to the data packet of multiple predetermined bit positions；
Encapsulation unit, for, by the data packet of the multiple predetermined bit position, being encapsulated as multiple agreements according to preset protocol
Packet；
Converting unit, multiple channels for being gated in the physical layer by the interface module, by the multiple agreement
Packet Parallel transformation is analog signal, and is sent to the host.
Another aspect provides a kind of terminal device, including processor and for storage processor executable instruction
The step of memory, the processor realizes the above method when executing described instruction.
Another aspect provides a kind of computer readable storage medium, is stored thereon with computer instruction, described instruction quilt
The step of above method is realized when execution.
In embodiments of the present invention, a kind of fingerprint recognition component, terminal device, image data transfer method and dress are provided
It sets, by interface module, the image data that fingerprint sensor acquires is sent to host by the channel that physical layer gates, because
The channel of the physical layer gating of the interface module of use carries out the transmission of image data, therefore the need of channel transmission may be implemented
It asks, and the number of channels of gating can be adjusted according to data transfer demands.Solves existing fingerprint image through the above scheme
The low problem of efficiency of transmission in the presence of data transmission procedure, has reached effective promotion finger print data efficiency of transmission, is promoted
The technical effect of recognition performance.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, not
Constitute limitation of the invention.In the accompanying drawings:
Fig. 1 is the hardware schematic of I2C communication interface；
Fig. 2 is the circuit diagram of I2C communication interface；
Fig. 3 is the hardware schematic of SPI communication interface；
Fig. 4 is the configuration diagram of fingerprint recognition component according to an embodiment of the present invention；
Fig. 5 is the configuration diagram of terminal device according to an embodiment of the present invention；
Fig. 6 is another configuration diagram of terminal device according to an embodiment of the present invention；
Fig. 7 is the method flow diagram of image data transfer method according to an embodiment of the present invention；
Fig. 8 is the hardware schematic of the fingerprint sensor of MIPI interface modes according to an embodiment of the present invention；
Fig. 9 is the schematic process flow diagram of data transmission according to an embodiment of the present invention；
Figure 10 is the structural block diagram of image data transmitting device according to an embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, right below with reference to embodiment and attached drawing
The present invention is described in further details.Here, exemplary embodiment and its explanation of the invention is used to explain the present invention, but simultaneously
It is not as a limitation of the invention.
In view of performance requirement of the people to fingerprint recognition on smart phone is higher and higher, the direct shadow of the speed of fingerprint recognition
This user experience is rung, is to be promoted to shorten call duration time for the communication speed how promoted between fingerprint sensor and host
The effective means of fingerprint recognition speed.
Currently, some fingerprint sensors use I2C (bidirectional two-line synchronous serial bus) communication interface, I2C is to compare
Common low speed transmissions agreement, hardware configuration as shown in Figure 1, I2C interface hardware is simple, resource consumption is few, be easy and its
Its device is compatible, and I2C is a kind of serial communication bus, and I2C interface only needs two signal wires that can complete data communication, and one
A serial time clock line SCL and serial data line SDA, the space occupied is very small, and cost is relatively low, therefore, in low-speed peripheral
Using relatively broad.As shown in Fig. 2, the signal wire SDA and SCL of I2C are bidirectional lines, pass through a current source or pull-up electricity
Resistance is connected to positive supply voltage, and when bus free, two lines are all high level, and the device output stage for being connected to bus is necessary
It is open-drain or open collector.This circuit structure determines that the transmission rate of I2C cannot be too fast, is under mode standard
100Kbps is 400kbps under quick mode, is 3.4Mbps under high-speed mode.This transmission speed be unable to satisfy large scale or
High-resolution fingerprint sensor or be the more demanding occasion of fingerprint recognition speed.
Data communication between some Fingerprint Identification Units and host is using SPI (Serial Peripheral
Interface, Serial Peripheral Interface (SPI)) communication technology, SPI compares compared to I2C, and there are certain promotion, transmission speed in speed
Rate highest can achieve 50Mbps, but the transmission speed of SPI will receive the limitation of equipment IO driving capability, set if only promoted
Standby driving capability, will definitely increase power consumption.As shown in figure 3, being the hardware schematic of SPI, SPI is that serial peripheral equipment connects
Mouthful, 4 signal wires: clock line SCLK, chip selection signal line SS, data line MOSI and MISO are needed in total.Wherein, SCLK is host
The clock signal sent to fingerprint sensor controls the rate of data exchange, and SS chooses corresponding fingerprint sensor for host,
MOSI sends data to fingerprint sensor for host, and MISO sends data to host for fingerprint sensor.
Carrying out data communication between fingerprint sensor and host by SPI technology has that two: one are that SPI does not have
Debugging ability only simply transmits data, is not able to satisfy high speed the other is the speed of SPI is still too slow without check code
Spend the demand of fingerprint sensor.For example, the size 80*64 of an exemplary capacitive fingerprint sensor, acquires the number of a frame image
There was only 40960bit according to amount, probably needs 4ms with the SPI transmission of 10MHz speed.Existing terminal device is mostly to shield comprehensively, screen
Lower optical fingerprint sensor will become main direction, because optical fingerprint sensor can be placed below screen, not influence to shield
The screen accounting of curtain.However, the optical fingerprint sensor of for example a size 450*450, cooperates the ADC of high-precision 16bit
The data volume of (Analog-to-Digital Converter, analog-digital converter), one frame image can reach 3240000bit,
If needing 324ms with the SPI transmission of 10MHz rate, entire unlocking process can be up to the several seconds on smart phone, this will be tight
Ghost image rings user experience.
In this example, the transmission of data is not carried out by I2C and SPI, and control instruction is only carried out by I2C and SPI
Transmission, the interface module by that can carry out physical layer channel gating carry out the transmission of data, pass so as to effectively promote data
Defeated efficiency promotes user experience.
Based on this, in this example, a kind of fingerprint recognition component is provided, as shown in figure 4, may include:
1) fingerprint sensor 401, for acquiring fingerprint image；
Wherein, fingerprint sensor (fingerprint Sensor) is a kind of sensing device, can be capacitance sensor, optical sensing
Device or other kinds of Fingerprint Identification Unit are the Primary Components for realizing fingerprint automatic collection.It can be with by setting fingerprint sensor
Acquire fingerprint image.
For example, fingerprint sensor is arranged on the touchscreen, then user is when using terminal equipment, when finger is put into
When touch screen, fingerprint sensor can sense that user touches the screen, the image of available user touch location,
Fingerprint image as user.
It, can be in the specific position of touch screen or the specific position of equipment non-touch screen when actually realizing
Fingerprint sensor is set, fingerprint sensor is set if it is in specific position, then user only contacts the specific position, ability
It triggers fingerprint sensor and acquires fingerprint image data.It is also possible to that Fingerprint Identification Unit is arranged in the full screen of touch screen, then only
It wants user to touch any position of the touch screen, fingerprint sensor acquisition fingerprint image data can be triggered.Actually answering
With when, fingerprint sensor, which how is arranged, to be selected according to actual needs, and the application is not construed as limiting this.
2) interface module 402 are connected with the fingerprint sensor, for gate the fingerprint image by physical layer
Channel is sent to host.
That is, interface module has can be set in above-mentioned fingerprint recognition component, it can be by fingerprint sensor by the interface module
The fingerprint image of acquisition is sent in host, carries out fingerprint recognition by host.Interface module provides the function of channel gating, example
Such as, the physical layer setting of interface module is there are three channel, then can gate two therein or three channels while carry out
Data transmission, because being multichannel simultaneous transmission, can effectively promote efficiency of transmission.Further, because channel is can
With gating, thus it can control according to actual transmission data requirements and gate several channels and gate which channel,
Realize the flexible controllable of efficiency of transmission.
In upper example, a kind of fingerprint recognition component is provided, by interface module, the picture number that fingerprint sensor is acquired
It is sent to host according to the channel gated by physical layer, because the channel of the physical layer gating of the interface module used carries out image
The transmission of data, therefore the demand of channel transmission may be implemented, and the channel of gating can be adjusted according to data transfer demands
Quantity.Solve that the efficiency of transmission in the presence of existing fingerprint image data transmission process is low to ask through the above scheme
Topic, has reached effective promotion finger print data efficiency of transmission, has promoted the technical effect of recognition performance.
In view of when carrying out fingerprint image transmission by interface module, being to need to carry out protocol conversion to data
, and need to be converted to the data mode that physical layer can be transmitted.In order to realize these transmission demands, above-mentioned interface module can be with
As shown in Figure 5, comprising:
1) register 501, for receiving the control instruction of the host；
Wherein, control parameter can be carried in the control instruction, wherein control parameter can include but is not limited to
It is at least one lower: transmission mode (for example, HS mode or LS mode), port number (such as: use a channel, or use
Two channels, or use more channels), and, when being carried out data transmission using two or more channels,
Transmission time sequence between each channel.
Whether above-mentioned control instruction can be started to work with the modules in control interface module, for example, examining in host
When measuring fingerprint sensor 401 and collect fingerprint image, host can be by control instruction control interface module
Modules are started to work.
2) system control module 502 are connected with the register, are used for according to the control instruction to data processing module
It is controlled with physical layer transmission module；
The system control module 502 is the module that interface module executes specific control operation, which can
With based on control instruction to and physical layer transmission module 504 specifically controlled, for example, can control data processing module
The specific rules (being reassembled as several bit, how to add check information etc.) of 503 pairs of data packets processing and encapsulation, can control
Gate several channels in physical layer transmission module 504, and specifically gate which channel etc..
3) data processing module 503 are connected with the system control module, for the control according to the system control module
The fingerprint image, is converted to the data packet for meeting preset protocol by system；
Data can be divided into the data mode of every group of predetermined bit by the data processing module 503, for example, being predefined as
Data, if being predefined as 16bit, are just divided into 16bit then data are just divided into 8bit by 8bit.It further, can be with
Data after segmentation are added into the packet header comprising check information and packet tail, wherein check information is used to verify really having for data
Effect property.It can be using odd by the way of, or using even parity check by the way of when specific implementation, wherein use surprise school
Test is that one is in addition added when transmitting each byte as check bit, when the number of " 1 " in real data is even number
When, this check bit is exactly " 1 ", and otherwise this check bit is exactly " 0 ", ensures that transmission data meet odd school in this way
The requirement tested.When recipient receives data, by the number of " 1 " in the requirement detection data according to odd, if it is odd number,
It indicates that transmission is correct, otherwise indicates transmission mistake.Similarly, the process of even parity check is as the process of odd, only testing number
The number of " 1 " is even number in.
Meet agreement that is, can be converted to the fingerprint image that fingerprint sensor acquires by data processing module 503
Data, and the data packet for meeting agreement is multiple packets of predetermined number of bits, it is impartial as far as possible each logical so as to realize
It is transmitted in road.
4) physical layer transmission module 504 is connected with the data processing module, for according to the system control module
Control, is converted to analog signal for the data packet for meeting preset protocol by the channel parallel of gating and is sent to the host.
The physical layer transmission module 504 is specifically used for realizing the physical layer transmission to data packet, because of the default association of above-mentioned satisfaction
The data packet of view is digital signal, can not be transmitted in physical layer, therefore, when actually realizing, is needed above-mentioned number
The data packet for meeting preset protocol of word signal is converted to analog signal, and then physical layer is transmitted again.Physical layer is to pass through
The multichannel of gating carries out analog signal transmission, accordingly it is also possible to which the multichannel of gating carries out digital-to-analogue conversion, such digital-to-analogue turns
Operation and specific transmission operation are changed, can be executed parallel, the effect of data conversion and data transmission can be effectively promoted
Rate.
There are two can be set in above-mentioned physical layer transmission module or more than two gateable channels, in practical application
In the process, which channel gating host can select according to actual needs.Because can be mentioned by the way of multichannel gating
The efficiency of transmission is risen, and gating can be adjusted according to actual needs.In view of the channel of gating is more, required function
Consumption is bigger, for this purpose, the quantity of gating can be adjusted in conjunction with the demand and power consumption situation to fingerprint recognition accuracy and speed, from
And while can guaranteeing to reach the required accuracy and speed, reduce power consumption.
Further, it is contemplated that fingerprint sensor real time data collected belongs to different clock domains from interface module,
Data can not be transmitted effectively, therefore, can be as shown in fig. 6, FIFO is arranged in above-mentioned fingerprint recognition component
(First Input First Output, first in first out) module, the fifo module are connected with fingerprint sensor and interface module,
Finger print data cross clock domain for obtaining the fingerprint sensor is sent to the MIPI interface module.That is, fingerprint sensing
Device fingerprint image collected can first be transmitted to asynchronous FIFO, be handled by asynchronous FIFO, after the treatment, then transmit
To interface module.
Above-mentioned interface module can include but is not limited to: MIPI (Mobile Industry Processor
Interface, mobile industry processor interface) module, when actually realizing, as long as being able to achieve physical layer channel gating
Interface module all can serve as above-mentioned interface module, to realize the parallel transmission of data, promote efficiency of transmission, it is specific to use
Which type of interface module, the application are not construed as limiting this.
A kind of terminal device is additionally provided in this example, which may include: touch screen, wherein touch screen
Above-mentioned fingerprint recognition component can be set in lower section；Host is connected, for receiving the fingerprint with the fingerprint recognition component
The fingerprint image of identification component transmission, and the fingerprint image is identified.
By the fingerprint recognition component being arranged on touch screen, when user operates touch screen, can pass through
Fingerprint recognition component acquires fingerprint image, and the fingerprint image High Speed Transfer of acquisition to host is carried out identifying processing.Because being
By the transmission of multichannel in the physical layer of interface module, therefore, efficiency of transmission is relatively high, accordingly even when being that full screen setting refers to
Line contact also can satisfy the demand of accuracy of identification and recognition time.
In view of needing to control for interface module, host may be implemented by the control to interface module
Efficiency of transmission etc. is controlled, by the control for starting the time to interface module, it is possible to reduce power consumption.For this purpose, above-mentioned terminal device
In be also provided with control instruction transmission module, be connected with the interface module in the host and the fingerprint recognition component,
For the control instruction of the host to be sent to the interface module.That is, by the way that the control instruction transmission module is arranged, it can be with
The control instruction of host is transmitted to interface module, realizes the control to interface module.
When control instruction transmission module is set, can by I2C interface module and/or SPI interface module because
Cost is relatively low for both interface modules, and because only transmitting control instruction, I2C interface module and/or SPI interface module completely may be used
To meet the requirements.By using I2C interface module and/or SPI interface module as control instruction transmission module, may be implemented it is low at
The simple control instruction transmission of this realization.
Wherein, above-mentioned terminal device can be the terminal device that guest operation uses.Specifically, terminal device can with but not
It is limited to be smart phone, tablet computer, laptop, desktop computer, smartwatch or other wearable devices etc.
Terminal device.
A kind of image data transfer method is additionally provided in this example based on above-mentioned fingerprint recognition component, as shown in fig. 7,
It may include steps of:
Step 701: acquisition fingerprint image；
Step 702: by the multiple channels gated in interface module, the fingerprint image being passed in parallel to host.
Specifically, in above-mentioned steps 702, by multiple channels of the middle gating of interface module, by the fingerprint image
It is passed in parallel to host, may include:
S1: the fingerprint image is split as to the data packet of multiple predetermined bit positions；
S2: according to preset protocol by the data packet of the multiple predetermined bit position, multiple protocol packages are encapsulated as；
Such as: data can be divided into the data mode of every group of predetermined bit, for example, 8bit is predefined as, then just will
Data are divided into 8bit, if being predefined as 16bit, data are just divided into 16bit.In order to realize the verification to data, to protect
The validity of data is demonstrate,proved, the data after segmentation can be added into the packet header comprising check information and packet tail, wherein check information is used
In the real effectiveness of verification data.
S3: the multiple channels gated in the physical layer by the interface module, by the multiple protocol package Parallel transformation
For analog signal, and it is sent to the host.
Such as: two channels of physical layer: channel 1 and channel 2 are gated, channel 1 can be passed through according to first data packet
Digital-to-analogue conversion and transmission are carried out, second data packet carries out digital-to-analogue conversion and transmission by channel 2, and third data packet passes through logical
Road 1 carries out digital-to-analogue conversion and transmission, and fourth data packet carries out digital-to-analogue conversion and transmission by channel 2, and the 5th data packet is logical
Cross channel 1 and carry out digital-to-analogue conversion and transmission, the 6th data packet by way of the progress digital-to-analogue conversion of channel 2 and transmission ..., from
And realize the digital-to-analogue conversion and transmission of the parallel equal transmission quantities of 2 data of channel 1 and channel, so as to realize the biography of load balancing
Defeated demand can effectively promote efficiency of transmission.Originally it is needed in 1s by all data of channel transfer, is passing through two
In the case where channel transfer, it is only necessary to 0.5 second, if only needing 0.33 second by three channel transfers, effectively improving
Efficiency of transmission.
It can be simulation LVDS (Low- by multiple protocol package Parallel transformations to promote the efficiency of transmission of physical layer
Voltage Differential Signaling, low-voltage differential signal) signal, that is, it can be by MIPI protocol digital signals
The LVDS signal of simulation is converted to, because transmission rate can be significantly improved by LVDS transmission mode, signal quality is improved, subtracts
Few cabling occupies the space of PCB.
The above method is illustrated below with reference to a specific embodiment, it should be noted, however, that the specific implementation
Example does not constitute an undue limitation on the present application merely to the application is better described.
In this example, it is illustrated so that interface module is MIPI interface module as an example, in order to promote fingerprint sensor and master
Message transmission rate between machine optimizes the speed of fingerprint recognition, in this example using MIPI interface as fingerprint sensor with
Data communication between host.
Wherein, MIPI can be divided into: physical layer and protocol layer two parts, wherein the physical layer of MIPI have D-PHY standard,
M-PHY standard, C-PHY standard these three, protocol layer includes: CSI agreement and DSI agreement.Wherein, D-PHY standard defines two
Kind of transmission mode: high-speed mode (HS) and low-power consumption mode (LP), under HS mode, signaling rate up to 80Mbps~
1Gbps, in the lp mode, signaling rate 10Mbps.The transmission speed ratio quantity of SPI high of MIPI under HS mode
Grade, it is therefore possible to use HS mode carries out data transmission between fingerprint sensor and host.
As shown in figure 8, MIPI interface may include: CLK+, CLK-, DATA1+, DATA1-, DATA2+, DATA2-, referring to
I2C interface or SPI interface are also provided between line sensor and host.Wherein, DATA1+/DATA1- indicates MIPI agreement
The difference analogue data-signal in first channel of group packet, DATA2+/DATA2- indicate the difference in second channel of MIPI protocol groups packet
Divide analog data signal, CLK+/CLK- indicates analog differential clock signal.Wherein, data channel is more, and transmission rate is faster,
More data can be transmitted, when realizing, two data channel can be used, it can also be logical using more data
Road, the data channel number specifically used can be not construed as limiting this according to actual data transfer demands, the application.
Wherein, I2C interface or SPI interface carry out the interaction of control signal for fingerprint sensor and host, and host can be with
The register parameters of fingerprint sensor end MIPI interface are configured by I2C interface or SPI interface, wherein register ginseng
Number may include: the transmission mode (for example, HS mode or LS mode) of MIPI, port number (such as: using a channel, also
It is to use two channels, or use more channels), and, carry out data transmission using two or more channels
When, the transmission time sequence between each channel.
The above-mentioned fingerprint sensor based on MIPI interface, as shown in figure 9, can carry out data transmission in accordance with the following steps:
Step 1: fingerprint sensor acquires image data, wherein the image data can be raw image data either
By the processed data of image module, which is fingerprint image data.For example, there is pressure on screen when experiencing
Power can then be acquired there are the image data at pressure, using the data as acquired image data.
Step 2: in view of fingerprint sensor real time data collected belongs to different clock domains from MIPI module, in order to
Unification is carried out, asynchronous FIFO module can be set, realizes that the cross clock domain of data transmits by asynchronous FIFO.That is, fingerprint
Sensor acquired image data can first be transmitted to asynchronous FIFO, be handled by asynchronous FIFO, after the treatment, then
It is sent to MIPI digital module.
Step 3: host can be controlled to the MIPI register transfer of fingerprint sensor by I2C interface or SPI interface and be ordered
It enables, to start MIPI system control module.
Step 4: under the action of MIPI system control module, MIPI data processing module reads number from asynchronous FIFO
According to then data being divided into the data mode of every group of predetermined bit, for example, 8bit is predefined as, then being just divided into data
Data are just divided into 16bit if being predefined as 16bit by 8bit.
Step 5: under the action of MIPI system control module, MIPI protocol groups packet module is that the data after segmentation add packet
Packet header and packet tail containing check information, wherein check information is used to verify the real effectiveness of data.When specific implementation
It can be by the way of odd, or by the way of even parity check, wherein using odd be to transmit each byte
When in addition add one be used as check bit, when " 1 " in real data number be even number when, this check bit is exactly
" 1 ", otherwise this check bit is exactly " 0 ", ensures that transmission data meet the requirement of odd in this way.It is received in recipient
When data, by the number of " 1 " in the requirement detection data according to odd, if it is odd number, indicates that transmission is correct, otherwise indicate
Transmit mistake.Similarly, the process of even parity check is as the process of odd, and only the number of " 1 " is even number in detection data.
Step 6:MIPI path management module according to channel strobe case, by the data of generation according to certain order and
It is required that being reasonably allocated to each channel.
Step 7: data enter physical layer and carry out digital-to-analogue conversion and data transmission.I.e., it is possible to by MIPI protocol digital signals
The LVDS signal of simulation is converted to, because transmission rate can be significantly improved by LVDS transmission mode, signal quality is improved, subtracts
Few cabling occupies the space of PCB.
For example, two channels of gating physical layer: channel 1 and channel 2 can pass through channel 1 according to first data packet
Digital-to-analogue conversion and transmission are carried out, second data packet carries out digital-to-analogue conversion and transmission by channel 2, and third data packet passes through logical
Road 1 carries out digital-to-analogue conversion and transmission, and fourth data packet carries out digital-to-analogue conversion and transmission by channel 2, and the 5th data packet is logical
Cross channel 1 and carry out digital-to-analogue conversion and transmission, the 6th data packet by way of the progress digital-to-analogue conversion of channel 2 and transmission ..., from
And realize the digital-to-analogue conversion and transmission of the parallel equal transmission quantities of 2 data of channel 1 and channel, so as to realize the biography of load balancing
Defeated demand can effectively promote efficiency of transmission.Originally it is needed in 1s by all data of channel transfer, is passing through two
In the case where channel transfer, it is only necessary to 0.5 second, if only needing 0.33 second by three channel transfers, effectively improving
Efficiency of transmission.
Step 8: host can unpack out original after receiving the data that physical layer transmits according to MIPI agreement backward
Image data.
Based on the same inventive concept, a kind of image data transmitting device is additionally provided in the embodiment of the present invention, it is such as following
Described in embodiment.Since the principle that image data transmitting device solves the problems, such as is similar to image data transfer method, image
The implementation of data transmission device may refer to the implementation of image data transfer method, and overlaps will not be repeated.It is following to be used
, the combination of the software and/or hardware of predetermined function may be implemented in term " unit " or " module ".Although following embodiment institute
The device of description preferably realized with software, but the combined realization of hardware or software and hardware be also may and quilt
Conception.Figure 10 is that a kind of structural block diagram of the image data transmitting device of the embodiment of the present invention can wrap as shown in Figure 10
Include: acquisition module 1001 and delivery module 1002 are below illustrated the structure.
Acquisition module 1001, for acquiring fingerprint image；
Delivery module 1002 transmits the fingerprint image for multiple channels by gating in interface module parallel
To host.
In one embodiment, above-mentioned delivery module 1002 may include: split cells, be used for the fingerprint image
It is split as the data packet of multiple predetermined bit positions；Encapsulation unit, for according to preset protocol by the multiple predetermined bit position
Data packet is encapsulated as multiple protocol packages；Converting unit, it is multiple logical for what is gated in the physical layer by the interface module
The multiple protocol package Parallel transformation is analog signal, and is sent to the host by road.
In one embodiment, encapsulation unit is specifically as follows the addition of each protocol package in the multiple protocol package school
Test information.
In one embodiment, the multiple protocol package Parallel transformation specifically can be simulation LVDS letter by converting unit
Number.
Embodiments herein also provides Overall Steps in the image data transfer method that can be realized in above-described embodiment
A kind of electronic equipment specific embodiment, the electronic equipment specifically includes following content:
Processor (processor), memory (memory), communication interface (Communications Interface) and
Bus；
Wherein, the processor, memory, communication interface complete mutual communication by the bus；The processing
Device is used to call the computer program in the memory, and the processor realizes above-mentioned implementation when executing the computer program
The Overall Steps in breast density automatic grading method in example, for example, reality when the processor executes the computer program
Existing following step:
Step 1: acquisition fingerprint image；
Step 2: by the multiple channels gated in interface module, the fingerprint image being passed in parallel to host.
Embodiments herein also provides Overall Steps in the image data transfer method that can be realized in above-described embodiment
A kind of computer readable storage medium, be stored with computer program on the computer readable storage medium, the computer journey
The Overall Steps of the image data transfer method in above-described embodiment are realized when sequence is executed by processor, for example, the processor
Following step is realized when executing the computer program:
Step 1: acquisition fingerprint image；
Step 2: by the multiple channels gated in interface module, the fingerprint image being passed in parallel to host.
As can be seen from the above description, in embodiments of the present invention, by interface module, the picture number that fingerprint sensor is acquired
It is sent to host according to the channel gated by physical layer, because the channel of the physical layer gating of the interface module used carries out image
The transmission of data, therefore the demand of channel transmission may be implemented, and the channel of gating can be adjusted according to data transfer demands
Quantity.Solve that the efficiency of transmission in the presence of existing fingerprint image data transmission process is low to ask through the above scheme
Topic, has reached effective promotion finger print data efficiency of transmission, has promoted the technical effect of recognition performance.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for hardware+
For program class embodiment, since it is substantially similar to the method embodiment, so being described relatively simple, related place is referring to side
The part of method embodiment illustrates.
It is above-mentioned that this specification specific embodiment is described.Other embodiments are in the scope of the appended claims
It is interior.In some cases, the movement recorded in detail in the claims or step can be come according to the sequence being different from embodiment
It executes and desired result still may be implemented.In addition, process depicted in the drawing not necessarily require show it is specific suitable
Sequence or consecutive order are just able to achieve desired result.In some embodiments, multitasking and parallel processing be also can
With or may be advantageous.
Although this application provides the method operating procedure as described in embodiment or flow chart, based on conventional or noninvasive
The labour for the property made may include more or less operating procedure.The step of enumerating in embodiment sequence is only numerous steps
One of execution sequence mode, does not represent and unique executes sequence.It, can when device or client production in practice executes
To execute or parallel execute (such as at parallel processor or multithreading according to embodiment or method shown in the drawings sequence
The environment of reason).
System, device, module or the unit that above-described embodiment illustrates can specifically realize by computer chip or entity,
Or it is realized by the product with certain function.It is a kind of typically to realize that equipment is computer.Specifically, computer for example may be used
Think personal computer, laptop computer, vehicle-mounted human-computer interaction device, cellular phone, camera phone, smart phone, individual
Digital assistants, media player, navigation equipment, electronic mail equipment, game console, tablet computer, wearable device or
The combination of any equipment in these equipment of person.
Although this specification embodiment provides the method operating procedure as described in embodiment or flow chart, based on conventional
It may include either more or less operating procedure without creative means.The step of being enumerated in embodiment sequence be only
One of numerous step execution sequence mode does not represent and unique executes sequence.Device or end product in practice is held
When row, can be executed according to embodiment or method shown in the drawings sequence or it is parallel execute (such as parallel processor or
The environment of multiple threads, even distributed data processing environment).The terms "include", "comprise" or its any other change
Body is intended to non-exclusive inclusion, so that process, method, product or equipment including a series of elements are not only wrapped
Those elements are included, but also including other elements that are not explicitly listed, or further includes for this process, method, product
Or the element that equipment is intrinsic.In the absence of more restrictions, being not precluded is including process, the side of the element
There is also other identical or equivalent elements in method, product or equipment.
For convenience of description, it is divided into various modules when description apparatus above with function to describe respectively.Certainly, implementing this
The function of each module can be realized in the same or multiple software and or hardware when specification embodiment, it can also be by reality
Show the module of same function by the combination realization etc. of multiple submodule or subelement.Installation practice described above is only
Schematically, for example, the division of the unit, only a kind of logical function partition, can there is other draw in actual implementation
The mode of dividing, such as multiple units or components can be combined or can be integrated into another system, or some features can be ignored,
Or it does not execute.Another point, shown or discussed mutual coupling, direct-coupling or communication connection can be by one
The indirect coupling or communication connection of a little interfaces, device or unit can be electrical property, mechanical or other forms.
It is also known in the art that other than realizing controller in a manner of pure computer readable program code, it is complete
Entirely can by by method and step carry out programming in logic come so that controller with logic gate, switch, specific integrated circuit, programmable
Logic controller realizes identical function with the form for being embedded in microcontroller etc..Therefore this controller is considered one kind
Hardware component, and the structure that the device for realizing various functions that its inside includes can also be considered as in hardware component.Or
Person even, can will be considered as realizing the device of various functions either the software module of implementation method can be hardware again
Structure in component.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
In a typical configuration, calculating equipment includes one or more processors (CPU), input/output interface, net
Network interface and memory.
Memory may include the non-volatile memory in computer-readable medium, random access memory (RAM) and/or
The forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM).Memory is computer-readable medium
Example.
Computer-readable medium includes permanent and non-permanent, removable and non-removable media can be by any method
Or technology come realize information store.Information can be computer readable instructions, data structure, the module of program or other data.
The example of the storage medium of computer includes, but are not limited to phase change memory (PRAM), static random access memory (SRAM), moves
State random access memory (DRAM), other kinds of random access memory (RAM), read-only memory (ROM), electric erasable
Programmable read only memory (EEPROM), flash memory or other memory techniques, read-only disc read only memory (CD-ROM) (CD-ROM),
Digital versatile disc (DVD) or other optical storage, magnetic cassettes, tape magnetic disk storage or other magnetic storage devices
Or any other non-transmission medium, can be used for storage can be accessed by a computing device information.As defined in this article, it calculates
Machine readable medium does not include temporary computer readable media (transitory media), such as the data-signal and carrier wave of modulation.
It will be understood by those skilled in the art that the embodiment of this specification can provide as the production of method, system or computer program
Product.Therefore, in terms of this specification embodiment can be used complete hardware embodiment, complete software embodiment or combine software and hardware
Embodiment form.Moreover, it wherein includes computer available programs that this specification embodiment, which can be used in one or more,
Implement in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of code
The form of computer program product.
This specification embodiment can describe in the general context of computer-executable instructions executed by a computer,
Such as program module.Generally, program module includes routines performing specific tasks or implementing specific abstract data types, journey
Sequence, object, component, data structure etc..This specification embodiment can also be practiced in a distributed computing environment, in these points
Cloth calculates in environment, by executing task by the connected remote processing devices of communication network.In distributed computing ring
In border, program module can be located in the local and remote computer storage media including storage equipment.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for system reality
For applying example, since it is substantially similar to the method embodiment, so being described relatively simple, related place is referring to embodiment of the method
Part explanation.In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ",
The description of " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, structure, material
Or feature is contained at least one embodiment or example of this specification embodiment.In the present specification, to above-mentioned term
Schematic representation be necessarily directed to identical embodiment or example.Moreover, description specific features, structure, material or
Person's feature may be combined in any suitable manner in any one or more of the embodiments or examples.In addition, in not conflicting feelings
Under condition, those skilled in the art by different embodiments or examples described in this specification and different embodiment or can show
The feature of example is combined.
The foregoing is merely the embodiments of this specification embodiment, are not limited to this specification embodiment.It is right
For those skilled in the art, this specification embodiment can have various modifications and variations.It is all in this specification embodiment
Any modification, equivalent replacement, improvement and so within spirit and principle, the right that should be included in this specification embodiment are wanted
Within the scope of asking.
Claims (16)
1. a kind of fingerprint recognition component characterized by comprising
Fingerprint sensor, for acquiring fingerprint image；
Interface module is connected with the fingerprint sensor, for transmitting the fingerprint image by the channel that physical layer gates
To host.
2. fingerprint recognition component according to claim 1, which is characterized in that the interface module includes:
Register, for receiving the control instruction of the host；
System control module is connected with the register, is used for according to the control instruction to data processing module and physical layer
Transmission module is controlled；
Data processing module is connected with the system control module, will be described for the control according to the system control module
Fingerprint image is converted to the data packet for meeting preset protocol；
Physical layer transmission module is connected with the data processing module, for the control according to the system control module, passes through
The data packet for meeting the preset protocol is converted to analog signal and is sent to the host by the channel parallel of gating.
3. fingerprint recognition component according to claim 2, which is characterized in that be provided in the physical layer transmission module more
A gateable channel.
4. fingerprint recognition component according to claim 1, which is characterized in that further include:
Fifo module is connected with the fingerprint sensor and the interface module, the finger for obtaining the fingerprint sensor
Line data cross clock domain is sent to the interface module.
5. fingerprint recognition component according to any one of claim 1 to 4, which is characterized in that the interface module is
MIPI interface module.
6. a kind of terminal device characterized by comprising
Touch screen, wherein fingerprint recognition component described in any one of claims 1 to 5 is provided with below the touch screen；
Host is connected with the fingerprint recognition component, for receiving the fingerprint image of the fingerprint recognition component transmission, and to institute
Fingerprint image is stated to be identified.
7. terminal device according to claim 6, which is characterized in that further include:
Control instruction transmission module is connected with the MIPI interface module in the host and the fingerprint recognition component, and being used for will
The control instruction of the host is sent to the MIPI interface module.
8. terminal device according to claim 7, which is characterized in that the control instruction transmission module includes: I2C interface
Module and/or SPI interface module.
9. a kind of image data transfer method characterized by comprising
Acquire fingerprint image；
By the multiple channels gated in interface module, the fingerprint image is passed in parallel to host.
10. according to the method described in claim 9, it is characterized in that, passing through multiple channels of the middle gating of interface module, by institute
It states fingerprint image and is passed in parallel to host, comprising:
The fingerprint image is split as to the data packet of multiple predetermined bit positions；
According to preset protocol by the data packet of the multiple predetermined bit position, it is encapsulated as multiple protocol packages；
The multiple protocol package Parallel transformation is simulation letter by the multiple channels gated in the physical layer by the interface module
Number, and it is sent to the host.
11. according to the method described in claim 10, it is characterized in that, according to the preset protocol by the multiple predetermined bit
The data packet of quantity is encapsulated as multiple protocol packages, comprising:
Check information is added for each protocol package in the multiple protocol package.
12. according to the method described in claim 10, it is characterized in that, being simulation letter by the multiple protocol package Parallel transformation
Number, comprising:
It is simulation LVDS signal by the multiple protocol package Parallel transformation.
13. a kind of image data transmitting device characterized by comprising
Acquisition module, for acquiring fingerprint image；
The fingerprint image is passed in parallel to host for multiple channels by gating in interface module by delivery module.
14. device according to claim 13, which is characterized in that the delivery module includes:
Split cells, for the fingerprint image to be split as to the data packet of multiple predetermined bit positions；
Encapsulation unit, for, by the data packet of the multiple predetermined bit position, being encapsulated as multiple protocol packages according to preset protocol；
Converting unit, multiple channels for being gated in the physical layer by the interface module, simultaneously by the multiple protocol package
Row is converted to analog signal, and is sent to the host.
15. a kind of terminal device, including processor and for the memory of storage processor executable instruction, the processor
The step of any one of claim 9 to 12 the method is realized when executing described instruction.
16. a kind of computer readable storage medium is stored thereon with computer instruction, described instruction, which is performed, realizes that right is wanted
The step of seeking any one of 9 to 12 the method.
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| CN201811645426.7A CN109739796A (en) | 2018-12-29 | 2018-12-29 | Fingerprint recognition component, terminal device, image data transfer method and device |
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