CN108391447A - Capacitive fingerprint chip, mismatch method of adjustment and terminal device - Google Patents
Capacitive fingerprint chip, mismatch method of adjustment and terminal device Download PDFInfo
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- CN108391447A CN108391447A CN201880000179.7A CN201880000179A CN108391447A CN 108391447 A CN108391447 A CN 108391447A CN 201880000179 A CN201880000179 A CN 201880000179A CN 108391447 A CN108391447 A CN 108391447A
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- analog parameter
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- General Engineering & Computer Science (AREA)
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Abstract
A kind of capacitive fingerprint chip of the application offer, mismatch method of adjustment and terminal device, the capacitive fingerprint chip, including：Fingerprint sensor array, control circuit and memory, fingerprint sensor array include multiple fingerprint sensor groups.Memory is used to store the use information of the corresponding multiple analog parameter groups of fingerprint sensor group；Analog parameter group is the analog parameter group that fingerprint sensor group is related to when carrying out stamp；The multiple analog parameter group includes original analog parameter group and amendment analog parameter group；Control circuit is used for the use information according to multiple analog parameter groups, fingerprint sensor group stamp is controlled, to obtain multiple quantities of electric charge；Fingerprint sensor array is additionally operable to carry out Integral Processing to multiple quantities of electric charge, obtains the capacitance of fingerprint sensor group.Capacitive fingerprint chip provided by the present application can obtain preferably fingerprint image effect.
Description
Technical field
This application involves a kind of fingerprint recognition field more particularly to capacitive fingerprint chip, mismatch method of adjustment and terminals to set
It is standby.
Background technology
Currently, capacitive fingerprint chip has been widely used in the intelligent terminals such as mobile phone, laptop, tablet computer.
Capacitive fingerprint chip is capacitance type fingerprint identification chip, its operation principle is：First, capacitive fingerprint chip includes that fingerprint passes
Sensor array, each fingerprint sensor in fingerprint sensor array includes an induction plate and an integrating circuit, works as hand
When referring to touch fingerprint sensor, fingerprint sensor can constitute fingerprint capacitor with the fingerprint of finger, can be made by drive signal
Fingerprint capacitor generates charge inducing, wherein since wrinkle ridge and line paddy are different with induction plate distance, wrinkle ridge and line paddy correspond to
Fingerprint capacitor it is of different sizes, so as to cause corresponding charge inducing amount difference.Usually a drive signal to incude
Electrode generates charge inducing and is known as a stamp.The charge that integrating circuit in fingerprint sensor can obtain multiple stamp is done
Integral Processing, to obtain the capacitance of fingerprint capacitor.Secondly, the processor in capacitive fingerprint chip or terminal device passes fingerprint
The corresponding each capacitance of sensor array is converted into corresponding digital signal, and generates fingerprint image, terminal according to digital signal
The fingerprint template of the fingerprint image and validated user can be carried out matching verification by equipment, to realize fingerprint recognition, wherein on
Stating matching verification process can be realized by the processor of terminal device, can also be in capacitive fingerprint chip interior (such as core
Microcontroller inside piece) it realizes.
The location of different fingerprint sensor difference in usual fingerprint sensor array, such as：Some fingerprint sensings
Device is in the center of fingerprint sensor array, some fingerprint sensors are in the marginal position of fingerprint sensor array, this
Kind position difference, is bound to cause the difference of the charge inducing of each fingerprint sensor, to cause fingerprint image is ineffective to ask
Topic, such as：Fingerprint image has that gray value is uneven.Further, since the difference of fingerprint sensor manufacturing process itself,
The reasons such as power voltage-drop, this is also bound to cause the ineffective problem of fingerprint image.
Invention content
A kind of capacitive fingerprint chip of the application offer, mismatch method of adjustment and terminal device, to improve fingerprint image effect
Fruit.
In a first aspect, the application provides a kind of capacitive fingerprint chip, including：It fingerprint sensor array, control circuit and deposits
Reservoir, fingerprint sensor array include multiple fingerprint sensor groups.
Memory is used to store the use information of the corresponding multiple analog parameter groups of fingerprint sensor group；Analog parameter group is
The analog parameter group that fingerprint sensor group is related to when carrying out stamp；Multiple analog parameter groups include original analog parameter group and repair
Positive simulation parameter group；Control circuit is used for the use information according to multiple analog parameter groups, controls fingerprint sensor group stamp, with
Obtain multiple quantities of electric charge；Fingerprint sensor array is additionally operable to carry out Integral Processing to multiple quantities of electric charge, obtains fingerprint sensor group
Capacitance.
The advantageous effect of the application includes：Even if two fingerprint sensor local environments differences or its own technique are not
Together, it in this application since control circuit is used for the access times according to the multiple analog parameter group, controls the fingerprint and passes
Sensor group stamp so as to reduce the quantity of electric charge difference between fingerprint sensor, and then reaches preferably image effect.
Optionally, analog parameter group includes the fingerprint sensing opened on the left of each fingerprint sensor set in fingerprint sensor group
The quantity for the fingerprint sensor set that the quantity of device set and right side are opened, and the use information of analog parameter group includes the mould
The access times of quasi- parameter group.
Optionally, fingerprint sensor set includes an at least row fingerprint sensor.
Optionally, the fingerprint sensor collection opened on the left of any one fingerprint sensor set that analog parameter group includes is corrected
The quantity of conjunction, is greater than or equal to, and the fingerprint opened on the left of any one fingerprint sensor set that original analog parameter group includes passes
The quantity of sensor set；Also, it corrects the fingerprint opened on the right side of any one fingerprint sensor set that analog parameter group includes to pass
The quantity of sensor set, is greater than or equal to, and is opened on the right side of any one fingerprint sensor set that original analog parameter group includes
The quantity of fingerprint sensor set.
Optionally, according to any two fingerprint sensor set in the fingerprint sensor group for correcting the determination of analog parameter group
The difference of affecting parameters, is less than or equal to, according to the shadow for any two fingerprint sensor set that original analog parameter group determines
Ring the difference of parameter；Wherein, the fingerprint sensing of the affecting parameters of fingerprint sensor set and opening on the left of fingerprint sensor set
The quantity of device set, and, the quantity for the fingerprint sensor set opened on the right side of fingerprint sensor set is proportional；Also,
At a distance from each fingerprint sensor set opened on the left of the affecting parameters of fingerprint sensor set and fingerprint sensor set, with
And the distance for each fingerprint sensor set opened on the right side of fingerprint sensor set is in inverse ratio.
Second aspect, the application provide a kind of adaptation method of adjustment, and method is applied to capacitive fingerprint chip, capacitive fingerprint core
Piece includes：Fingerprint sensor array, control circuit and memory, fingerprint sensor array include multiple fingerprint sensors；Storage
Device is used to store the use information of the corresponding multiple analog parameter groups of fingerprint sensor group；Analog parameter group is fingerprint sensor group
The analog parameter group being related to when carrying out stamp；Multiple analog parameter groups include beginning analog parameter group and amendment analog parameter group；
Method includes：
Control circuit controls fingerprint sensor group stamp according to the use information of multiple analog parameter groups, multiple to obtain
The quantity of electric charge；Fingerprint sensor array carries out Integral Processing to multiple quantities of electric charge, obtains the capacitance of fingerprint sensor group.
Optionally, analog parameter group includes the fingerprint sensing opened on the left of each fingerprint sensor set in fingerprint sensor group
The quantity for the fingerprint sensor set that the quantity of device set and right side are opened, and the use information of analog parameter group includes the mould
The access times of quasi- parameter group.
Optionally, fingerprint sensor set includes an at least row fingerprint sensor.
Optionally, the fingerprint sensor collection opened on the left of any one fingerprint sensor set that analog parameter group includes is corrected
The quantity of conjunction, is greater than or equal to, and the fingerprint opened on the left of any one fingerprint sensor set that original analog parameter group includes passes
The quantity of sensor set；Also, it corrects the fingerprint opened on the right side of any one fingerprint sensor set that analog parameter group includes to pass
The quantity of sensor set, is greater than or equal to, and is opened on the right side of any one fingerprint sensor set that original analog parameter group includes
The quantity of fingerprint sensor set.
Optionally, according to any two fingerprint sensor set in the fingerprint sensor group for correcting the determination of analog parameter group
The difference of affecting parameters, is less than or equal to, according to the shadow for any two fingerprint sensor set that original analog parameter group determines
Ring the difference of parameter；
Wherein, the fingerprint sensor set of the affecting parameters of fingerprint sensor set and opening on the left of fingerprint sensor set
Quantity, and, the quantity for the fingerprint sensor set opened on the right side of fingerprint sensor set is proportional；Also, fingerprint passes
At a distance from each fingerprint sensor set opened on the left of the affecting parameters of sensor set and fingerprint sensor set, and, fingerprint
The distance for each fingerprint sensor set opened on the right side of set of sensors is in inverse ratio.
The third aspect, the application provide a kind of terminal device, including：Such as first aspect or first aspect any one of them
Capacitive fingerprint chip.
Fourth aspect, the application provide a kind of capacitive fingerprint device, including fingerprint sensor array, control circuit and storage
Device, fingerprint sensor array include multiple fingerprint sensor groups, each fingerprint sensor group includes an at least row fingerprint sensing
Device unit；
Memory is connected to control circuit, and the use for storing the corresponding multiple analog parameter groups of fingerprint sensor group is believed
Breath, wherein analog parameter group is the analog parameter group that fingerprint sensor group is related to when carrying out stamp；
Control circuit is connected to fingerprint sensor array, and for the use information according to multiple analog parameter groups, control refers to
Multiple fingerprint sensor elements of line sensor group carry out stamp respectively, to obtain multiple quantities of electric charge；
Fingerprint sensor array be additionally operable to the quantity of electric charge that each fingerprint sensor elements is obtained by stamp respectively into
Row Integral Processing obtains the capacitance of fingerprint sensor elements.
Optionally, analog parameter group includes that the fingerprint that each fingerprint sensor set both sides are opened in fingerprint sensor group passes
The quantity of sensor set, and the use information of analog parameter group includes the access times of analog parameter group.
Optionally, multiple analog parameter groups include original analog parameter group and original analog parameter group after correcting
Correct analog parameter group.
Optionally, the fingerprint sensor collection opened on the left of any one fingerprint sensor set that analog parameter group includes is corrected
The quantity of conjunction, is greater than or equal to, and the fingerprint opened on the left of any one fingerprint sensor set that original analog parameter group includes passes
The quantity of sensor set；Also, it corrects the fingerprint opened on the right side of any one fingerprint sensor set that analog parameter group includes to pass
The quantity of sensor set, is greater than or equal to, and is opened on the right side of any one fingerprint sensor set that original analog parameter group includes
The quantity of fingerprint sensor set.
Optionally, according to any two fingerprint sensor set in the fingerprint sensor group for correcting the determination of analog parameter group
The difference of affecting parameters, is less than or equal to, according to the shadow for any two fingerprint sensor set that original analog parameter group determines
Ring the difference of parameter
Optionally, the fingerprint sensor collection of the affecting parameters of fingerprint sensor set and opening on the left of fingerprint sensor set
The quantity of conjunction, and, the quantity for the fingerprint sensor set opened on the right side of fingerprint sensor set is proportional；Also, fingerprint
At a distance from each fingerprint sensor set opened on the left of the affecting parameters of set of sensors and fingerprint sensor set, and, refer to
The distance for each fingerprint sensor set opened on the right side of line set of sensors is in inverse ratio.
A kind of capacitive fingerprint chip of the application offer, mismatch method of adjustment and terminal device, the capacitive fingerprint chip, packet
It includes：Fingerprint sensor array, control circuit and memory, every N row in fingerprint sensor array constitute a fingerprint sensor
Group.Memory is used to store the access times of the corresponding multiple analog parameter groups of fingerprint sensor group；Analog parameter group is fingerprint
The analog parameter group that sensor group is related to when carrying out stamp；An analog parameter group in multiple analog parameter groups is original mould
Quasi- parameter group, remaining analog parameter group in multiple analog parameter groups in addition to original analog parameter group is original analog parameter group
Amendment analog parameter group；Control circuit is used for the access times according to multiple analog parameter groups, and control fingerprint sensor group is beaten
Code, to obtain multiple quantities of electric charge；Fingerprint sensor array is additionally operable to carry out Integral Processing to multiple quantities of electric charge, obtains fingerprint sensing
The capacitance of device group.Based on this, even if two fingerprint sensor local environments are different or its own technique is different, in this Shen
Please in be used to, according to the access times of multiple analog parameter groups, control fingerprint sensor group stamp due to control circuit, so as to
To reduce the quantity of electric charge difference between fingerprint sensor, and then reach preferably image effect.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this Shen
Some embodiments please for those of ordinary skill in the art without having to pay creative labor, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the schematic diagram for the capacitive fingerprint chip 10 that one embodiment of the application provides；
Fig. 2 is the schematic diagram for the fingerprint sensor group that one embodiment of the application provides；
Fig. 3 is the affecting parameters distribution schematic diagram for the current finger print sensor column that one embodiment of the application provides；
Fig. 4 is a kind of flow chart for adaptation method of adjustment that one embodiment of the application provides；
Fig. 5 is the schematic diagram that the application one is a kind of similar terminal device provided.
Specific implementation mode
To keep the purpose, technical scheme and advantage of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, technical solutions in the embodiments of the present application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art
The every other embodiment obtained without creative efforts, shall fall in the protection scope of this application.
The term " comprising " and " having " and their any deformation that the description and claims of this application is related to,
Be intended to cover it is non-exclusive include, for example, containing the process of series of steps or unit, method, system, product or setting
It is standby those of to be not necessarily limited to clearly to list step or unit, but may include not listing clearly or for these mistakes
The intrinsic other steps of journey, method, product or equipment or unit.
The location of different fingerprint sensor difference in usual fingerprint sensor array, such as：Some fingerprint sensings
Device is in the center of fingerprint sensor array, some fingerprint sensors are in the marginal position of fingerprint sensor array, this
Kind position difference, is bound to cause the difference for the charge inducing that each fingerprint sensor obtains, this is bound to cause fingerprint image effect not
Good problem, such as：Fingerprint image has that gray value is uneven.Further, since fingerprint sensor manufacturing process itself
Difference, the reasons such as power voltage-drop, this is also bound to cause the ineffective problem of fingerprint image.
In order to solve the above-mentioned technical problem, a kind of capacitive fingerprint chip of the application offer, mismatch method of adjustment and terminal are set
It is standby.Fig. 1 is the schematic diagram for the capacitive fingerprint chip 10 that one embodiment of the application provides, as shown in Figure 1, the capacitive fingerprint chip 10
Including：Fingerprint sensor array 11, control circuit 12 and memory 13, wherein fingerprint sensor array 11 includes in array
Multiple fingerprint sensors (or being fingerprint sensor elements) unit of arrangement, for example, the multiple fingerprint sensor can be in m
Row and n row arrangements, and multiple fingerprint sensors of the fingerprint sensor array 11 can be grouped to realize fingerprint image
Acquisition, wherein each grouping is properly termed as a fingerprint sensor group.In this application, it will be arranged per N in fingerprint sensor array
Fingerprint sensor is known as a fingerprint sensor group, and N is the positive integer more than or equal to 1.For example, Fig. 2 is implemented for the application one
The schematic diagram for the fingerprint sensor group that example provides, as shown in Fig. 2, wherein every 5 row fingerprint sensor constitutes a fingerprint sensor
Group.
Memory 13 is used to store the access times of the corresponding multiple analog parameter groups of fingerprint sensor group；The multiple mould
Quasi- parameter group can be burned onto in control circuit 12.Alternatively, the partial simulation parameter group in multiple analog parameter groups can be with burning
Into control circuit 12, another part is stored in memory 13, and the application is without limitation.
Analog parameter group is the analog parameter group that fingerprint sensor group is related to when carrying out stamp；The multiple analog parameter
An analog parameter group in group is original analog parameter group, and the multiple analog parameter group further includes except original analog is joined
Remaining analog parameter group except array, such as amendment analog parameter group of the original analog parameter group after correcting.
Optionally, analog parameter group includes the fingerprint sensing opened on the left of each fingerprint sensor set in fingerprint sensor group
The quantity for the fingerprint sensor set that the quantity of device set and right side are opened.Wherein, fingerprint sensor set includes at least one row
Fingerprint sensor.In this case, so-called original analog parameter group refers to usual capacitive fingerprint chip to fingerprint sensor group
When being acquired image, the fingerprint of the quantity for the fingerprint sensor set opened on the left of each fingerprint sensor set and right side opening
Set of sensors quantity (such as：Usually when carrying out Image Acquisition to current finger print sensor group, control circuit control is current
One group of the left side fingerprint sensor and one group of right side fingerprint sensor of fingerprint sensor group are opened, and are adopted wherein being currently used in image
The fingerprint sensor of collection arranges or the left and right sides of set is opened but non-fingerprint sensor row or set for figure acquisition can
With referred to as shadow row or shadow set).For example, table 1 is the corresponding original analog parameter group of current finger print sensor group,
Middle current finger print sensor group includes 5 current finger print sensor columns, and current finger print sensor group left and right side is opened respectively
One group of fingerprint sensor, every group of fingerprint sensor include 5 row fingerprint sensors.It should be noted that the fingerprint sense of touch in table 1
The as above-mentioned fingerprint tactility apparatus set of device row.
Table 1
In the present embodiment, remaining analog parameter group in the multiple analog parameter group in addition to original analog parameter group
For the amendment analog parameter group of original analog parameter group.Such as：Table 2 is the corresponding amendment analog parameter of current finger print sensor group
Group.It should be noted that the fingerprint tactility apparatus row in table 2 are above-mentioned fingerprint tactility apparatus set.
Table 2
In the present embodiment, following principle can be followed, original analog parameter group is modified to amendment analog parameter group：
Based on the original analog parameter group of current finger print sensor group, the processor of terminal device, capacitive fingerprint chip or
Person's other equipment or device can calculate the affecting parameters of each current finger print set of sensors in current finger print sensor group,
The quantity for the fingerprint sensor set opened on the left of the affecting parameters of middle fingerprint set of sensors and fingerprint sensor set, with
And the quantity for the fingerprint sensor set opened on the right side of fingerprint sensor set is proportional；Also, fingerprint sensor set
At a distance from each fingerprint sensor set opened on the left of affecting parameters and fingerprint sensor set, and, fingerprint sensor set
The distance for each fingerprint sensor set that right side is opened is in inverse ratio.
Such as：The affecting parameters of current finger print set of sensors are what current finger print set of sensors left and right side was opened
The sum of corresponding impact factor of fingerprint sensor set, the impact factor are opened with current finger print set of sensors left or right side
Fingerprint sensor set distance be in inverse ratio, i.e., distance it is closer, then impact factor is bigger, when two opening fingerprint sensor
Set is identical at a distance from current finger print set of sensors, then the corresponding impact factor of the two can consider also identical.
As shown in table 1, it is assumed that it is adjacent with current finger print sensor column M, and the fingerprint sensor being in an open state is arranged to it
The first impact factor be C1, arranged with one fingerprint sensor in the intervals current finger print sensor column M, and the fingerprint being in an open state
Sensor column is C2 to its second impact factor, and so on, with eight, the intervals current finger print sensor column M fingerprint sensor
Row, and it is C9, M=1,2 ... 5 that the fingerprint sensor being in an open state, which is arranged to its 9th impact factor, is calculated separately current
The affecting parameters of fingerprint sensor row 1 to 5：
The affecting parameters of current finger print sensor column 1 are：
2*C1+2*C2+2*C3+2*C4+2*C5+C6+C7+C8+C9
The affecting parameters of current finger print sensor column 2 are：
2*C1+2*C2+2*C3+2*C4+2*C5+2*C6+C7+C8
3 affecting parameters of current finger print sensor column are：
2*C1+2*C2+2*C3+2*C4+2*C5+2*C6+2*C7
The affecting parameters of current finger print sensor column 4 are：
2*C1+2*C2+2*C3+2*C4+2*C5+2*C6+C7+C8
The affecting parameters of current finger print sensor column 5 are：
2*C1+2*C2+2*C3+2*C4+2*C5+C6+C7+C8+C9。
Fig. 3 is the affecting parameters distribution schematic diagram for the current finger print sensor column that one embodiment of the application provides, P1 to P5
Current finger print sensor column 1 to 5 is indicated respectively, as shown in Figure 3, it is known that 3 corresponding affecting parameters of current finger print sensor column are most
Greatly, wherein the reason for causing each current finger print sensor column affecting parameters different be the position of each current finger print sensor column not
Together, this position difference is bound to cause the difference for the charge inducing that each fingerprint sensor obtains, to cause fingerprint image to imitate
The bad problem of fruit in order to solve this problem in this application can be modified original analog parameter group, such as：Needle
To current finger print sensor column 1, increases open a fingerprint sensor group to the left, equally, for current finger print sensor
Row 2 also increase and open a fingerprint sensor group to the left, for current finger print sensor column 3, each side increase at it
Add and open a fingerprint sensor group, for current finger print sensor column 4 and 5, increases on the right side of it open a fingerprint respectively
Sensor group, is specifically shown in Table 2.
As shown in table 2, it is assumed that it is adjacent with current finger print sensor column M, and the fingerprint sensor being in an open state is arranged to it
The first impact factor be C1, arranged with one fingerprint sensor in the intervals current finger print sensor column M, and the fingerprint being in an open state
Sensor column is C2 to its second impact factor, and so on, with 11, the intervals current finger print sensor column M fingerprint sensor
Row, and it is C12, M=1,2 ... 5 that the fingerprint sensor being in an open state, which is arranged to its 9th impact factor, is calculated separately current
The affecting parameters of fingerprint sensor row 1 to 5：
The affecting parameters of current finger print sensor column 1 are：
2*C1+2*C2+2*C3+2*C4+2*C5+2*C6+2*C7+2*C8+2*C9+C10
The affecting parameters of current finger print sensor column 2 are：
2*C1+2*C2+2*C3+2*C4+2*C5+2*C6+2*C7+2*C8+C9+C10+C11
The affecting parameters of current finger print sensor column 3 are：
2*C1+2*C2+2*C3+2*C4+2*C5+2*C6+2*C7+2*C8+2*C9+2*C10+2*C11+2*C12
The affecting parameters of current finger print sensor column 4 are：
2*C1+2*C2+2*C3+2*C4+2*C5+2*C6+2*C7+2*C8+C9+C10+C11
The affecting parameters of current finger print sensor column 5 are：
2*C1+2*C2+2*C3+2*C4+2*C5+2*C6+2*C7+2*C8+2*C9+C10
In practical applications, directly Tables 1 and 2 can be burned onto in control circuit 12, only 1 He of storage table of memory 13
Access times of the table 2 during stamp.
It should be noted that aforesaid way is not limited to the correcting mode of original analog parameter group, for example, for currently referring to
Line sensor column 1 increases by two fingerprint sensor groups of opening and equally for current finger print sensor column 2, also exists to the left
Its left side, which increases, opens two fingerprint sensor groups, for current finger print sensor column 3, each side increases at it and opens two
A fingerprint sensor group increases on the right side of it open two fingerprint sensor groups respectively for current finger print sensor column 4 and 5.
Based on this, multiple amendment analog parameter groups can be obtained by different correcting modes.As long as correcting analog parameter group to meet such as
Lower condition：
Condition 1, according to correcting any two fingerprint sensor set in the fingerprint sensor group that analog parameter group determines
The difference of affecting parameters, is less than or equal to, according to the shadow for any two fingerprint sensor set that original analog parameter group determines
Ring the difference of parameter.For example, based on original analog parameter group, the affecting parameters of current finger print sensor column 1 and 3 shown in table 1
Difference be C6+C7-C8-C9, based on correcting analog parameter group, the affecting parameters of current finger print sensor column 1 and 3 shown in table 2
Difference be C10+2*C11+2*C12, since C6 and C7 is far longer than C10 and C11, C6+C7-C8-C9 is greater than or equal to
C10+2*C11+2*C12。
Condition 2 corrects the fingerprint sensor collection opened on the left of any one fingerprint sensor set that analog parameter group includes
The quantity of conjunction, is greater than or equal to, and the fingerprint opened on the left of any one fingerprint sensor set that original analog parameter group includes passes
The quantity of sensor set, and correct the fingerprint sensing opened on the right side of any one fingerprint sensor set that analog parameter group includes
The quantity of device set, is greater than or equal to, the finger opened on the right side of any one fingerprint sensor set that original analog parameter group includes
The quantity of line set of sensors.For example, based on original analog parameter group shown in table 1,1 left side of current finger print sensor column is opened
Fingerprint sensor set quantity be 5, right side open fingerprint sensor set quantity be 10；Based on being repaiied shown in table 2
The quantity of positive simulation parameter group, the fingerprint sensor set that 1 left side of current finger print sensor column is opened is 10, the finger that right side is opened
The quantity of line set of sensors is 9.
Further, control circuit 12 is used for the access times according to multiple analog parameter groups, controls fingerprint sensor group
Stamp, to obtain multiple quantities of electric charge.Such as：The corresponding multiple analog parameter groups of current finger print sensor group are respectively such as Tables 1 and 2
Shown content, 1 corresponding access times of table are N1, and 2 corresponding access times of table are N2, and control circuit 12 controls fingerprint sensor
When group stamp, it is N1 and N2 to use the number of Tables 1 and 2 respectively, wherein each fingerprint sensor in fingerprint sensor group point
Other stamp, each fingerprint sensor can obtain multiple quantities of electric charge.
As described above, each fingerprint sensor includes an induction plate and an integrating circuit, integrating circuit is for obtaining
Multiple quantities of electric charge on the fingerprint sensor are taken, and Integral Processing is carried out to multiple quantities of electric charge, obtain the electricity of the fingerprint sensor
Capacitance.
To sum up, in this application, fingerprint sensor group corresponds to multiple analog parameter groups, and plurality of analog parameter group includes
The amendment analog parameter group of original analog parameter group and the original analog parameter group, that is to say, that even if two fingerprint sensors
Local environment is different or its own technique is different, in this application since control circuit is used to be joined according to the multiple simulation
The access times of array control the fingerprint sensor group stamp, poor so as to reduce the quantity of electric charge between fingerprint sensor
It is different, and then reach preferably image effect.
Fig. 4 is a kind of flow chart for adaptation method of adjustment that one embodiment of the application provides, and the executive agent of this method is
Capacitive fingerprint chip, capacitive fingerprint chip include：Fingerprint sensor array, control circuit and memory, fingerprint sensor array
In every N row constitute a fingerprint sensor group, N is positive integer more than or equal to 1；Memory is for storing fingerprint sensor
The access times of the corresponding multiple analog parameter groups of group；Analog parameter group is the mould that fingerprint sensor group is related to when carrying out stamp
Quasi- parameter group；An analog parameter group in the multiple analog parameter group is original analog parameter group, and the multiple simulation
Parameter group further includes remaining analog parameter group in addition to original analog parameter group, such as the amendment simulation of original analog parameter group
Parameter group；As shown in figure 4, this method comprises the following steps：
Step S401：Control circuit controls fingerprint sensor group stamp according to the use information of multiple analog parameter groups, with
Obtain multiple quantities of electric charge；
Step S402：Fingerprint sensor array carries out Integral Processing to multiple quantities of electric charge, obtains the electricity of fingerprint sensor group
Capacitance.
Optionally, analog parameter group includes the fingerprint sensing opened on the left of each fingerprint sensor set in fingerprint sensor group
The quantity for the fingerprint sensor set that the quantity of device set and right side are opened, and the use information of the analog parameter group includes institute
State the access times of analog parameter group.
Optionally, fingerprint sensor set includes an at least row fingerprint sensor.
Optionally, the fingerprint sensor collection opened on the left of any one fingerprint sensor set that analog parameter group includes is corrected
The quantity of conjunction, is greater than or equal to, and the fingerprint opened on the left of any one fingerprint sensor set that original analog parameter group includes passes
The quantity of sensor set, and correct the fingerprint sensing opened on the right side of any one fingerprint sensor set that analog parameter group includes
The quantity of device set, is greater than or equal to, the finger opened on the right side of any one fingerprint sensor set that original analog parameter group includes
The quantity of line set of sensors.
Optionally, according to any two fingerprint sensor set in the fingerprint sensor group for correcting the determination of analog parameter group
The difference of affecting parameters, is less than or equal to, according to the shadow for any two fingerprint sensor set that original analog parameter group determines
Ring the difference of parameter；
Wherein, the fingerprint sensor set of the affecting parameters of fingerprint sensor set and opening on the left of fingerprint sensor set
Quantity, and, the quantity for the fingerprint sensor set opened on the right side of fingerprint sensor set is proportional, and fingerprint sensor
At a distance from each fingerprint sensor set opened on the left of the affecting parameters of set and fingerprint sensor set, and, fingerprint sensing
The distance for each fingerprint sensor set opened on the right side of device set is in inverse ratio.
Adaptation method of adjustment provided by the embodiments of the present application, this method can be held by capacitive fingerprint chip provided by the present application
Row, details are not described herein to its content and effect by the application.
Fig. 5 is the schematic diagram that the application one is a kind of similar terminal device provided, which can be mobile phone, pen
This computer, tablet computer etc. are remembered, as shown in figure 5, the terminal device includes capacitive fingerprint chip 51 and processor 52.
Capacitive fingerprint chip 51 includes：Fingerprint sensor array, control circuit and memory, in fingerprint sensor array
Per N, row constitute a fingerprint sensor group, and N is the positive integer more than or equal to 1；Memory is for storing fingerprint sensor group pair
The access times for the multiple analog parameter groups answered；Analog parameter group is the simulation ginseng that fingerprint sensor group is related to when carrying out stamp
Array；An analog parameter group in the multiple analog parameter group is original analog parameter group, and the multiple analog parameter
Group further includes remaining analog parameter group in addition to original analog parameter group, such as the amendment analog parameter of original analog parameter group
Group；Control circuit is used for the access times according to multiple analog parameter groups, fingerprint sensor group stamp is controlled, to obtain multiple electricity
Lotus amount；Fingerprint sensor array is additionally operable to carry out Integral Processing to multiple quantities of electric charge, obtains the capacitance of fingerprint sensor group.
Optionally, analog parameter group includes the fingerprint sensing opened on the left of each fingerprint sensor set in fingerprint sensor group
The quantity for the fingerprint sensor set that the quantity of device set and right side are opened.
Optionally, fingerprint sensor set includes an at least row fingerprint sensor.
Optionally, the fingerprint sensor collection opened on the left of any one fingerprint sensor set that analog parameter group includes is corrected
The quantity of conjunction, is greater than or equal to, and the fingerprint opened on the left of any one fingerprint sensor set that original analog parameter group includes passes
The quantity of sensor set, and correct the fingerprint sensing opened on the right side of any one fingerprint sensor set that analog parameter group includes
The quantity of device set, is greater than or equal to, the finger opened on the right side of any one fingerprint sensor set that original analog parameter group includes
The quantity of line set of sensors.
Optionally, according to any two fingerprint sensor set in the fingerprint sensor group for correcting the determination of analog parameter group
The difference of affecting parameters, is less than or equal to, according to the shadow for any two fingerprint sensor set that original analog parameter group determines
Ring the difference of parameter.
Wherein, the fingerprint sensor set of the affecting parameters of fingerprint sensor set and opening on the left of fingerprint sensor set
Quantity, and, the quantity for the fingerprint sensor set opened on the right side of fingerprint sensor set is proportional, and fingerprint sensor
At a distance from each fingerprint sensor set opened on the left of the affecting parameters of set and fingerprint sensor set, and, fingerprint sensing
The distance for each fingerprint sensor set opened on the right side of device set is in inverse ratio.
Processor 52 can be used for realizing that analog parameter group is corrected in as described in the present application be modified to original analog parameter group
Principle.Certainly, which can also be by capacitive fingerprint chip 51, and the application is without limitation.
Further, which can also include following one or more components：Memory 53, power supply module 54,
Multimedia component 55, audio component 56, the interface 57 of input/output (I/O), sensor module 58 and communication component 59 etc..
Memory 53 is configured as storing various types of data to support the operation in terminal device.These data are shown
Example includes instruction for any application program or method that operate on the terminal device, contact data, and telephone book data disappears
Breath, picture, video etc..Memory 53 is by can be by any kind of volatibility or non-volatile memory device or their group
It closes and realizes, such as static RAM (SRAM), electrically erasable programmable read-only memory (EEPROM) is erasable to compile
Journey read-only memory (EPROM), programmable read only memory (PROM), read-only memory (ROM), magnetic memory, flash
Device, disk or CD.
Power supply module 54 provides electric power for the various assemblies of terminal device.Power supply module 54 may include power management system
System, one or more power supplys and other generate, manage and distribute electric power associated component with for terminal device.
The touch-control that multimedia component 55 is included in one output interface of offer between the terminal device and user is shown
Screen.In some embodiments, touching display screen may include liquid crystal display (LCD) and touch panel (TP).Touch panel packet
One or more touch sensors are included to sense the gesture on touch, slide, and touch panel.The touch sensor can not
The boundary of a touch or slide action is only sensed, but also detects duration associated with the touch or slide operation and pressure
Power.In some embodiments, multimedia component 55 includes a front camera and/or rear camera.At terminal device
In operation mode, when such as screening-mode or video mode, front camera and/or rear camera can receive external more matchmakers
Volume data.Each front camera and rear camera can be a fixed optical lens system or have focal length and optics
Zoom capabilities.
Audio component 56 is configured as output and/or input audio signal.For example, audio component 56 includes a microphone
(MIC), when terminal device is in operation mode, when such as call model, logging mode and speech recognition mode, microphone is configured
To receive external audio signal.The received audio signal can be further stored in memory 53 or via communication component 59
It sends.In some embodiments, audio component 56 further includes a loud speaker, is used for exports audio signal.
I/O interfaces 57 provide interface between processor 52 and peripheral interface module, and above-mentioned peripheral interface module can be
Keyboard, click wheel, button etc..These buttons may include but be not limited to：Main button, volume button, start button and locking are pressed
Button.
Sensor module 58 includes one or more sensors, and the state for providing various aspects for terminal device is commented
Estimate.For example, sensor module 58 can detect the state that opens/closes of terminal device, and the relative positioning of component, for example, it is described
Component is the display and keypad of terminal device, and sensor module 58 can be with one group of detection terminal equipment or terminal device
The position change of part, the existence or non-existence that user contacts with terminal device, terminal device orientation or acceleration/deceleration and terminal are set
Standby temperature change.Sensor module 58 may include proximity sensor, be configured to without any physical contact
It detects the presence of nearby objects.Sensor module 58 can also be used for including optical sensor such as CMOS or ccd image sensor
It is used in imaging applications.In some embodiments, which can also include acceleration transducer, and gyroscope passes
Sensor, Magnetic Sensor, pressure sensor or temperature sensor.
Communication component 59 is configured to facilitate the communication of wired or wireless way between terminal device and other equipment.Terminal
Equipment can access the wireless network based on communication standard, such as WiFi, 2G or 3G or combination thereof.In an exemplary reality
It applies in example, communication component 59 receives broadcast singal or the related letter of broadcast from external broadcasting management system via broadcast channel
Breath.In one exemplary embodiment, the communication component 59 further includes near-field communication (NFC) module, to promote short range communication.
For example, radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra wide band (UWB) skill can be based in NFC module
Art, bluetooth (BT) technology and other technologies are realized.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (17)
1. a kind of capacitive fingerprint chip, which is characterized in that including：Fingerprint sensor array, control circuit and memory, the finger
Line sensor array includes multiple fingerprint sensor groups；
The memory is used to store the use information of the corresponding multiple analog parameter groups of the fingerprint sensor group；The simulation
Parameter group is the analog parameter group that the fingerprint sensor group is related to when carrying out stamp；The multiple analog parameter group includes original
Beginning analog parameter group and amendment analog parameter group；
The control circuit is used for the use information according to the multiple analog parameter group, controls the fingerprint sensor group and beats
Code, to obtain multiple quantities of electric charge；
The fingerprint sensor array is additionally operable to carry out Integral Processing to the multiple quantity of electric charge, obtains the fingerprint sensor group
Capacitance.
2. capacitive fingerprint chip according to claim 1, which is characterized in that the analog parameter group includes that the fingerprint passes
The fingerprint sensor that the quantity for the fingerprint sensor set opened on the left of each fingerprint sensor set in sensor group and right side are opened
The quantity of set, and the use information of the analog parameter group includes the access times of the analog parameter group.
3. capacitive fingerprint chip according to claim 2, which is characterized in that the fingerprint sensor set includes at least one
Row fingerprint sensor.
4. capacitive fingerprint chip according to claim 2 or 3, which is characterized in that the amendment analog parameter group includes
The quantity for the fingerprint sensor set opened on the left of any one fingerprint sensor set, is greater than or equal to, the original analog ginseng
The quantity for the fingerprint sensor set opened on the left of any one described fingerprint sensor set that array includes；Also, it is described to repair
The quantity for the fingerprint sensor set opened on the right side of any one fingerprint sensor set that positive simulation parameter group includes, is more than or waits
In the fingerprint sensor set opened on the right side of any one described fingerprint sensor set that the original analog parameter group includes
Quantity.
5. capacitive fingerprint chip according to claim 4, which is characterized in that determined according to the amendment analog parameter group
The difference of the affecting parameters of any two fingerprint sensor set, is less than or equal to, according to described in the fingerprint sensor group
The difference of the affecting parameters for any two fingerprint sensor set that original analog parameter group determines；
Wherein, the affecting parameters of the fingerprint sensor set and the fingerprint sensor opened on the left of the fingerprint sensor set
The quantity of set, and, the quantity for the fingerprint sensor set opened on the right side of the fingerprint sensor set is proportional；And
And each fingerprint sensor set of the affecting parameters of the fingerprint sensor set and opening on the left of the fingerprint sensor set
Distance, and, the distance for each fingerprint sensor set opened on the right side of the fingerprint sensor set is in inverse ratio.
6. a kind of adaptation method of adjustment, which is characterized in that the method is applied to capacitive fingerprint chip, the capacitive fingerprint chip
Including：Fingerprint sensor array, control circuit and memory, the fingerprint sensor array include multiple fingerprint sensor groups；
The memory is used to store the use information of the corresponding multiple analog parameter groups of the fingerprint sensor group；The analog parameter
Group is the analog parameter group that the fingerprint sensor group is related to when carrying out stamp；The multiple analog parameter group includes original mould
Quasi- parameter group and amendment analog parameter group；The method includes：
The control circuit controls the fingerprint sensor group stamp according to the use information of the multiple analog parameter group, with
Obtain multiple quantities of electric charge；
The fingerprint sensor array carries out Integral Processing to the multiple quantity of electric charge, obtains the capacitance of the fingerprint sensor group
Value.
7. according to the method described in claim 6, it is characterized in that, the analog parameter group includes in the fingerprint sensor group
The number for the fingerprint sensor set that the quantity for the fingerprint sensor set opened on the left of each fingerprint sensor set and right side are opened
Amount, and the use information of the analog parameter group includes the access times of the analog parameter group.
8. the method according to the description of claim 7 is characterized in that the fingerprint sensor set is passed including an at least row fingerprint
Sensor.
9. method according to claim 7 or 8, which is characterized in that the amendment analog parameter group either one or two of includes referring to
The quantity for the fingerprint sensor set opened on the left of line set of sensors, is greater than or equal to, the original analog parameter group includes
Described any one fingerprint sensor set on the left of the quantity of fingerprint sensor set opened；Also, the amendment simulation ginseng
The quantity for the fingerprint sensor set opened on the right side of any one fingerprint sensor set that array includes, is greater than or equal to, described
The quantity for the fingerprint sensor set opened on the right side of any one described fingerprint sensor set that original analog parameter group includes.
10. according to the method described in claim 9, it is characterized in that, the finger determined according to the amendment analog parameter group
The difference of the affecting parameters of any two fingerprint sensor set, is less than or equal in line sensor group, according to the original mould
The difference of the affecting parameters for any two fingerprint sensor set that quasi- parameter group determines；
Wherein, the affecting parameters of the fingerprint sensor set and the fingerprint sensor opened on the left of the fingerprint sensor set
The quantity of set, and, the quantity for the fingerprint sensor set opened on the right side of the fingerprint sensor set is proportional；And
And each fingerprint sensor set of the affecting parameters of the fingerprint sensor set and opening on the left of the fingerprint sensor set
Distance, and, the distance for each fingerprint sensor set opened on the right side of the fingerprint sensor set is in inverse ratio.
11. a kind of terminal device, which is characterized in that including：Capacitive fingerprint chip as described in any one in claim 1-5.
12. a kind of capacitive fingerprint device, which is characterized in that including fingerprint sensor array, control circuit and memory, the finger
Line sensor array includes multiple fingerprint sensor groups, each fingerprint sensor group includes an at least row fingerprint sensor list
Member；
The memory is connected to the control circuit, for storing the corresponding multiple analog parameter groups of the fingerprint sensor group
Use information, wherein the analog parameter group is the analog parameter group that the fingerprint sensor group is related to when carrying out stamp；
The control circuit is connected to the fingerprint sensor array, for being believed according to the use of the multiple analog parameter group
Breath, the multiple fingerprint sensor elements for controlling the fingerprint sensor group carry out stamp respectively, to obtain multiple quantities of electric charge；
The fingerprint sensor array be additionally operable to the quantity of electric charge that each fingerprint sensor elements is obtained by stamp respectively into
Row Integral Processing obtains the capacitance of the fingerprint sensor elements.
13. capacitive fingerprint device according to claim 12, which is characterized in that the analog parameter group includes the fingerprint
The quantity for the fingerprint sensor set that each fingerprint sensor set both sides are opened in sensor group, and the analog parameter group
Use information includes the access times of the analog parameter group.
14. capacitive fingerprint device according to claim 12 or 13, which is characterized in that the multiple analog parameter group includes
The amendment analog parameter group of original analog parameter group and the original analog parameter group after correcting.
15. capacitive fingerprint device according to claim 14, which is characterized in that times for correcting analog parameter group and including
The quantity for the fingerprint sensor set opened on the left of one fingerprint sensor set, is greater than or equal to, the original analog parameter
The quantity for the fingerprint sensor set opened on the left of any one described fingerprint sensor set that group includes；Also, the amendment
The quantity for the fingerprint sensor set opened on the right side of any one fingerprint sensor set that analog parameter group includes, is more than or waits
In the fingerprint sensor set opened on the right side of any one described fingerprint sensor set that the original analog parameter group includes
Quantity.
16. capacitive fingerprint device according to claim 15, which is characterized in that determined according to the amendment analog parameter group
The fingerprint sensor group in any two fingerprint sensor set affecting parameters difference, be less than or equal to, according to institute
State the difference of the affecting parameters of any two fingerprint sensor set of original analog parameter group determination.
17. capacitive fingerprint device according to claim 16, which is characterized in that the influence of the fingerprint sensor set is joined
The quantity of number and the fingerprint sensor set opened on the left of the fingerprint sensor set, and, the fingerprint sensor set
The quantity for the fingerprint sensor set that right side is opened is proportional；Also, affecting parameters and the institute of the fingerprint sensor set
The distance for each fingerprint sensor set opened on the left of fingerprint sensor set is stated, and, on the right side of the fingerprint sensor set
The distance for each fingerprint sensor set opened is in inverse ratio.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/077712 WO2019165619A1 (en) | 2018-03-01 | 2018-03-01 | Capacitive fingerprint chip, mismatch adjustment method and terminal device |
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| CN108391447A true CN108391447A (en) | 2018-08-10 |
| CN108391447B CN108391447B (en) | 2022-04-01 |
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| WO (1) | WO2019165619A1 (en) |
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Also Published As
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| CN108391447B (en) | 2022-04-01 |
| WO2019165619A1 (en) | 2019-09-06 |
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