CN108985284A - Latch Restoration Mechanism based on Stateful Inspection and the fingerprint sensor shaken hands - Google Patents
Latch Restoration Mechanism based on Stateful Inspection and the fingerprint sensor shaken hands Download PDFInfo
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- CN108985284A CN108985284A CN201811158155.2A CN201811158155A CN108985284A CN 108985284 A CN108985284 A CN 108985284A CN 201811158155 A CN201811158155 A CN 201811158155A CN 108985284 A CN108985284 A CN 108985284A
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- 230000007246 mechanism Effects 0.000 title description 15
- 238000007689 inspection Methods 0.000 title description 5
- 238000000034 method Methods 0.000 claims abstract description 59
- 238000004891 communication Methods 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 28
- 230000008569 process Effects 0.000 description 29
- 230000002159 abnormal effect Effects 0.000 description 16
- 238000012360 testing method Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 10
- 230000005611 electricity Effects 0.000 description 7
- 238000011084 recovery Methods 0.000 description 7
- 238000012790 confirmation Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 230000003993 interaction Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
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Classifications
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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
- G06V40/1329—Protecting the fingerprint sensor against damage caused by the finger
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/31—User authentication
- G06F21/32—User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
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- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Image Input (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Collating Specific Patterns (AREA)
- Power Sources (AREA)
Abstract
Provide the device and method for restoring from the latch mode of finger sensor apparatus.For example, disclosed equipment can be operating as executing following operation, comprising: receive the original sensor data from the sensor array with micro-controller communications in the microcontroller of finger sensor apparatus；The original sensor data received is compared with predetermined threshold；And be based at least partially on and compare, resetting is supplied to the electric power of finger sensor apparatus to restore from latch mode.
Description
The application be on November 16th, 2015 applying date, it is entitled " based on Stateful Inspection and the fingerprint sensor shaken hands
Latch Restoration Mechanism " Chinese invention patent application 201510782897.2 divisional application.
Technical field
The present invention relates to the latch recoveries for the sensor pixel circuits used in fingerprint recognition.
Background technique
Various electronic equipments or information system can protect personal data using User identification mechanism and prevent from not awarding
The access of power.User authentication on electronic equipment or information system can be identified and be authenticated by the personal of one or more forms
Method executes, including one or more biometric identifiers.Biometric identifier can be used alone or
Regular authentication method as such as cipher authentication method it is additional.The popular form of biometric identifier is personal fingerprint
Pattern.Fingerprint sensor can be built in the fingerprint pattern that user is read in electronic equipment, so that equipment can only pass through authorization
The certification of the fingerprint pattern of user is unlocked by the authorized user of equipment.In some implementations, this fingerprint sensor can wrap
It includes with the sensor pixel circuits for identifying the pixelation pixel sensor cell of capture fingerprint pattern for user.
Summary of the invention
Present specification describes for providing equipment, system and technology and is based in part on Stateful Inspection and handshake mechanism
Execute the technology that the latch of fingerprint sensor circuit restores.
Technology described in present specification can be provided for from the sensor pixel used in fingerprint recognition system
The mechanism restored in the latch mode of circuit.
In one aspect, the method restored from the latch mode of finger sensor apparatus is described.This method is included in
The microcontroller of finger sensor apparatus receives the original sensor data from the sensor array with micro-controller communications.It should
Method includes that the original sensor data that will be received is compared with predetermined threshold.This method includes being based at least partially on ratio
Compared with resetting is supplied to the electric power of finger sensor apparatus to restore from latch mode.
This method can be realized in various ways, to include one or more features in following characteristics.At least partly
Ground is supplied to the electric power of finger sensor apparatus based on resetting is compared to restore to may include working as to receive from latch mode
Original sensor data determines that fingerprint sensor is in latch mode when not being able to satisfy predetermined threshold.Resetting is supplied to fingerprint sensing
The electric power of device equipment includes: to close low pressure drop (LDO) voltage-stablizer to close the electric power for being supplied to finger sensor apparatus；Make to power off
Kept for a period of time to restore from latch mode；And LDO voltage stabilizer is again turned on to restore to be supplied to finger sensor apparatus
Electric power.
On the other hand, the method restored from the latch mode of the equipment including finger sensor apparatus is described.It should
Method includes the host-processor reading initial check code stored in memory in equipment.This method is included in host process
Device reads the calculated check code of microcontroller by finger sensor apparatus.This method includes comparing the verification of the two readings
Code is for matching；And it is based at least partially on and compares resetting microcontroller to restore from latch mode.
This method can be realized in various ways, to include one or more features in following characteristics.At least partly
Ground may include determining that microcontroller is in latch mode when the check code compared mismatches based on resetting microcontroller is compared.
On the other hand, the method restored from the latch mode of the equipment including finger sensor apparatus is described.It should
Method includes the confirmation of shaking hands in the host-processor request and the microcontroller of finger sensor apparatus of equipment.This method includes
When determine microcontroller fail complete request reset microcontroller when shaking hands and confirming.
Method described in present specification can be realized in the equipment for including finger sensor apparatus without the use of attached
The hardware added.
On the other hand, finger sensor apparatus includes the sensor array for detecting original fingerprint sensing data；It is electrically connected
Connect the power-supply controller of electric that the power transmission from power supply to sensor array is controlled between sensor array and power supply；And with biography
The microcontroller of sensor array and power-supply controller of electric communication.Microcontroller can execute following operation, comprising: from sensor array
Receive the original sensor data detected；By the original sensor data received and instruction latch mode predetermined threshold into
Row compares, and is based at least partially on and compares, and sends signal to power-supply controller of electric so that power-supply controller of electric resetting is supplied to finger
The electric power of line sensor device from latch mode to restore.
Finger sensor apparatus can be realized in various ways, to include one or more features in following characteristics.
For example, power-supply controller of electric may include low pressure drop (LDO) voltage-stablizer.When the original sensor data received be not able to satisfy it is predetermined
When threshold value, microcontroller can determine that fingerprint sensor is in latch mode.Microcontroller can send signal comprising close
Power-supply controller of electric is to cut off the signal of the electric power from power supply.When microcontroller can make power-supply controller of electric remain turned-off one section
Between, to cut off the power and restore from latch mode during this period.Microcontroller can be again turned on power-supply controller of electric with
Restore the electric power for being supplied to finger sensor apparatus.
In another aspect, electronic equipment may include finger sensor apparatus.Finger sensor apparatus may include matching
It is set to the sensor array of detection original fingerprint sensing data, and the microcontroller communicated with sensor array, microcontroller
It is configured as calculating check code.Electronic equipment may include the host process with the micro-controller communications of finger sensor apparatus
Device.Host-processor can execute following operation, comprising: reading initial check code stored in memory is read by fingerprint
The calculated check code of the microcontroller of sensor device compares the check code of the two readings to obtain microcontroller in door bolt
The instruction of lock status, and be based at least partially on and compare resetting microcontroller to restore from latch mode.
Electronic equipment can be realized in various ways, to include one or more features in following characteristics.For example, working as
When the check code compared mismatches, host-processor can determine that microcontroller is in latch mode.Electronic equipment may include
Smart phone, tablet computer, laptop computer or wearable device.
In another aspect, electronic equipment may include finger sensor apparatus.Finger sensor apparatus may include inspection
The microcontroller surveying the sensor array of original fingerprint sensing data and being communicated with sensor array.Electronic equipment may include
With the host-processor of the micro-controller communications of finger sensor apparatus.Host-processor can execute following operation, comprising: ask
The confirmation of shaking hands with the microcontroller of finger sensor apparatus is asked, and when determining microcontroller fails the confirmation of shaking hands for completing to request
When reset microcontroller.
Electronic equipment may be implemented as including one or more features in following characteristics.For example, working as host-processor
Determine that microcontroller fails to complete the shaking hands when confirming of request, host-processor can determine that microcontroller is in latch mode.
In some implementations, the detection of latch described in present specification and recovery can include finger sensor apparatus
It is realized in the equipment of special-purpose electrostatic discharge detection circuit hardware.
For example, finger sensor apparatus for electronic equipment may include the sensing for detecting original fingerprint sensing data
Device array；The microcontroller communicated with sensor array；And it is detected with the static discharge of sensor array and micro-controller communications
Circuit.Electrostatic discharge testing circuit can execute following operation, comprising: the abnormal voltage or electricity of detection instruction electrostatic discharge event
Signal is flowed, and is operated by microcontroller Bypass Clock signal with arrestment.
Finger sensor apparatus can be realized in various ways, to include one or more features in following characteristics.
For example, electrostatic discharge testing circuit can make the abnormal voltage detected or current signal be discharged.Static discharge detection electricity
Road can reactivate clock signal after discharge.Electrostatic discharge testing circuit can be with micro-controller communications static discharge thing
Part.
In yet other aspects, electronic equipment includes that host-processor and the fingerprint sensor communicated with host-processor are set
It is standby.Finger sensor apparatus includes: that the sensor array for being configured to detection original fingerprint sensing data and sensor array are logical
The microcontroller of letter and electrostatic discharge testing circuit with sensor array and micro-controller communications.Electrostatic discharge testing circuit can
To execute following operation, comprising: the abnormal voltage or current signal of detection instruction electrostatic discharge event, and by by microcontroller
Road clock signal is operated with arrestment.
Electronic equipment can be realized in various ways, to include one or more features in following characteristics.For example, quiet
Discharge of electricity detection circuit can make the abnormal voltage detected or current signal be discharged.Electrostatic discharge testing circuit can be
Clock signal is reactivated after electric discharge.Electrostatic discharge testing circuit can communicate electrostatic with microcontroller and host-processor and put
Electric event.Host-processor can execute self-test and restore state and logical process.Microcontroller can execute self-test and recovery
State and logical process.
In another aspect, the side restored from the latch mode of the electronic equipment including finger sensor apparatus is disclosed
Method.This method includes detecting the abnormal voltage or current signal of instruction electrostatic discharge event in electrostatic discharge testing circuit；And it is other
Road clock signal is to stop the mistake of the operation for causing electronic equipment.
This method can be realized in various ways, to include one or more features in following characteristics.For example, the party
Method may include the abnormal voltage or current discharge detected.This method may include reactivating clock letter after discharge
Number.This method may include to microcontroller and host-processor instruction electrostatic discharge event.This method may include in host
Processor executes self-test and restores state and logical process.This method may include executing self-test in microcontroller and restoring state
And logical process.
The above and other aspect and its realization are described in further detail in attached drawing, description and claims.
Detailed description of the invention
Fig. 1 is the block diagram for showing the exemplary latch Restoration Mechanism realized in the equipment with fingerprint sensor.
Fig. 2 is the process flow for comparing the example process of detection latch mode based on raw sensor output data
Figure.
Fig. 3 is for confirming the process flow diagram flow chart for executing latch detection and the example process restored based on check code.
Fig. 4 is the process flow diagram flow chart for executing latch detection and the example process restored based on confirmation of shaking hands.
Fig. 5 is the frame for showing another the exemplary latch Restoration Mechanism realized in the equipment with fingerprint sensor
Figure.
Fig. 6 is the process flow diagram flow chart for the example process based on static discharge (ESD) detection detection latch mode.
Specific embodiment
In the equipment for including fingerprint circuit, static discharge (ESD) will lead to excessive electric power and flow through fingerprint circuit and set
It is standby, so as to cause the latch mode of fingerprint circuit and equipment.In addition, esd event can damage fingerprint circuit and equipment, and even
The user contacted with equipment is damaged.Due to executing the sensing surface of the equipment of fingerprint recognition close to user's finger is placed
The sensor electrode array (for example, condenser type or other) of arrangement, ESD can enter the equipment with fingerprint circuit.Touch-sensing
Surface can cause ESD with the finger for initiating the user of fingerprint detection.
Due to fingerprint circuit be often disposed in it is close with other computation modules of the equipment of such as processor or controller
Physical distance, therefore the ESD for causing excessive electric power to flow through fingerprint circuit can flow through the processor being placed around or controller simultaneously
And processor and controller is caused to break down.The technical description disclosed in present specification is for detecting latch mode simultaneously
And the mechanism restored from the latch mode detected.It is described for detecting latch mode and the mechanism therefrom restored is disobeyed
Rely in or require additional circuit or other hardware.Such as host-processor and the fingerprint sensing including microcontroller can be used
The existing hardware of device equipment realizes described latch detection and Restoration Mechanism.
Fig. 1 is the block diagram for showing the exemplary latch Restoration Mechanism realized in the equipment 100 with fingerprint sensor.If
Standby 100 can be any electronic equipment including the fingerprint sensor for providing secure access to equipment 100.For example, equipment
100 may include portable device, smart phone, tablet computer, laptop computer, smartwatch etc..Equipment 100 is wrapped
Various electronic circuits and component are included, the host-processor 102 being such as communicatively coupled with finger sensor apparatus 110 is (for example, core
Piece).Host-processor 102 is communicated with finger sensor apparatus 110, with the sensor for including from finger sensor apparatus 110
106 receiving sensor data of array.Host-processor is by executing and the micro controller unit in finger sensor apparatus 110
(MCU) it 104 shakes hands and is communicated with finger sensor apparatus 110.Once between host-processor 102 and MCU 104 complete at
Function is shaken hands, and host-processor 102 and finger sensor apparatus 110 can communicate with one another, to send and receive including requesting,
The various signals of order, data etc..The example of the signal transmitted between host-processor 102 and MCU 104 is shown in Fig. 1
For appended drawing reference 108.
MCU 104 controls the operation of sensor array 106, and the electric power (PW CTR) of sensor array 106 is arrived including controlling.
Electric control can be by opening and closing the electricity from power supply (VDD) to sensor array 106 using low pressure drop (LDO) voltage-stablizer
Power executes.In addition, the transmission of the various signals between MCU 104 and sensor array 106 may include TX (transmission), RX
(reception) and I2C (internal integrated circuit).For example, sensor array can will be come from response to the request from MCU 104
The sensor output data of each sensor in 106 is sent to MCU 104.The sensor number that MCU 104 can will be received
According to relaying or be forwarded to after the treatment or before treatment host-processor 102.
When ESD or other interference can cause latch mode, finger sensor apparatus 110 and host-processor 102 can be by
To influence.Fig. 2 is the process flow for comparing the example process of detection latch mode based on raw sensor output data
Figure.Can based on the raw sensor output data of each sensor in sensor array 106 detect due to ESD or its
It interferes the fingerprint sensor 106 for entering latch mode.MCU 104 can receive former from the sensor in sensor array 106
Beginning data.When the original sensor data received when MCU 104 is determining is bigger than predetermined threshold, 106 quilt of finger sensor apparatus
It is determined as being not at latch mode.This normal operating is illustrated as normal circulation on the left-hand side of flow chart.When MCU 104 is true
Surely when the original sensor data received is less than predetermined threshold, MCU 104 determines that finger sensor apparatus 106 is in latch shape
Resetting is supplied to the electric power of finger sensor apparatus 106 by state and MCU 104, to restore from latch mode.From latch shape
The process restored in state may include closing LDO to close the electric power for being supplied to finger sensor apparatus 106；Make electric power from door bolt
It is remained turned-off in a period of time needed for lock status recovery；And LDO is again turned on to restore to be supplied to finger sensor apparatus 106
Electric power.
Fig. 3 is for confirming the process flow diagram flow chart for executing latch detection and the example process restored based on check code.When
When ESD or other interference effect MCU 104, MCU 104 itself can enter latch mode.Latch cannot be executed in MCU 104
In the case where recovery, host-processor 102 can execute latch recovery.When MCU 104 is in latch mode, with constant
SRAM sections can change.Host is by that can determine MCU 104 compared with by the calculated check code of MCU 104 for initial check code
Whether latch mode is in.The latch recovery process executed by host-processor 102 may include: to read initial check code；It reads
It takes by the calculated check code of MCU 104；And compare whether the two check codes match.When the two check codes mismatch,
Host-processor 102 determines that MCU 104 is in latch mode and will reset MCU 104.This exception or latch mode are by mistake
Abnormal circulation on the right-hand side of journey flow chart is to indicate.When host-processor 102 determines the matching of the two check codes, host
Processor 102 determines that MCU 104 is not at latch mode and will not reset MCU 104.This normal operating is by process flow
Normal circulation on the left-hand side of figure indicates.Host-processor can continue to compare the two check codes, to determine MCU 104
Whether latch mode is in.
Fig. 4 is the process flow diagram flow chart for executing latch detection and the example process restored based on confirmation of shaking hands.One
In a little realizations, whether host-processor 102 can determine MCU 104 in latch mode based on the completion for confirmation of shaking hands.Work as MCU
104 when being in latch mode, and the code segment of MCU can be changed since ESD or other is interfered.When the code segment of MCU is changed
When, host-processor 102 cannot be completed in the case where its program fleet to shake hands with MCU 104.When host-processor 102 is true
Determine MCU 104 not completing with host-processor 102 when shaking hands, host-processor determines that MCU 104 is in latch mode simultaneously
And MCU 104 will be reset.This abnormal operation is indicated by the abnormal circulation on the right-hand side of process flow diagram flow chart.Work as host process
Device 102 determines that the completion of MCU 104 is shaken hands when confirming, host-processor 102 determines that MCU 104 is not at latch mode and host
Processor 102 will not reset MCU.
Fig. 5 is to show another the exemplary latch Restoration Mechanism realized in the equipment 500 with fingerprint sensor 510
Block diagram.Equipment 500 can be any electronics including the line sensor device for providing secure access to equipment 500 and set
It is standby.For example, equipment 500 may include portable device, such as smart phone, tablet computer, laptop computer, smartwatch
Deng.Equipment 500 includes various electronic circuits and component, the host-processor being such as communicatively coupled with finger sensor apparatus 510
502 (for example, chips).Host-processor 502 is communicated with finger sensor apparatus 510, to wrap from finger sensor apparatus 510
The 506 receiving sensor data of sensor array included.Host-processor 502 is via input/output (I/O) interface 508 by holding
Row is communicated with the shaking hands for micro controller unit (MCU) 504 in finger sensor apparatus 510 with finger sensor apparatus 510.One
Denier is completed successfully to shake hands between 504 host of host-processor 502 and MCU, and host-processor 502 and fingerprint sensor are set
Standby 510 can communicate with one another to send and receive the various signals including request, order, data etc..Be shown in FIG. 5 through
Multiple examples of the signal transmitted between host-processor 502 and MCU 504 by I/O interface 508.
MCU 504 controls the operation of sensor array 506, and the electric power of sensor array 506 is arrived including controlling.Electric control
It can be executed by being opened and closed using LDO voltage stabilizer from power supply (VDD) to the electric power of sensor array 506.In addition,
The transmission of various signals between MCU 504 and sensor array 506 may include TX (transmission), RX (reception) and I2C is (internal
Integrated circuit).For example, can be in response to the request from MCU 504, by each sensor in sensor array 506
Sensor output data be sent to MCU 504.MCU 504 after the treatment or can be handled the sensing data received
Relay or be forwarded to before host-processor 502.
In addition, esd detection circuit 512 is communicated with MCU 504 and sensor array 506, to fasten with a bolt or latch as caused by esd event
Restoration Mechanism is completed after lock status.Esd detection circuit 512 can prevent by esd event generate high-voltage signal directly with electricity
The sub- interaction of equipment 500, this interaction can damage equipment 500.Esd detection circuit can use including esd discharge pipe or circuit
Different circuits are realized.
For example, esd event can make high voltage (typically larger than 4000V) signal enter I/O interface 508, thus in increasing
The voltage of portion's power supply.The voltage that esd discharge pipe in esd detection circuit 512 can limit internal electric source increases above threshold value electricity
It is flat.Esd discharge pipe in esd detection circuit 512 can be opened, and discharge the charge stored before to enable I/O interface, and
High current is formed as abnormal current or forms high voltage as abnormal voltage.
Fig. 6 is the process flow diagram flow chart for the example process 600 using esd detection circuit detection latch mode.Process
600 show normal circulation on left-hand side and show abnormal circulation on the right-hand side.In circulation extremely, when ESD is examined
When slowdown monitoring circuit 512 detects the abnormal voltage or electric current generated due to esd event, when esd detection circuit bypath system or equipment
Clock (number and simulation) comes halt system or the operation of equipment 500 to avoid the mistake that may occur under abnormal voltage or electric current.
Abnormal current or tension discharge for a period of time after, when voltage or electric current return to normal operation range, esd detection circuit
512 can reactivate system or equipment clock, and the abnormal conditions for notifying host-processor 502 and MCU 504 to occur.It is main
Machine processor 502 and MCU 504 can execute self-test and restore corresponding environment (for example, state and logical process), until
Complete Restoration Mechanism.
When current or voltage is in normal operation range, process 600 operates in normal circulation.
Various realizations and the example of disclosed technology has been described.Disclosed technology is utilized for storing by touching
The integrator of the charge of capacitor sensor accumulation is utilized for exporting variable voltage and adjusting the electricity being stored in parasitic capacitance
The voltage generator of lotus and the sensor pixel circuits with dedicated integrator are utilized, wherein dedicated integrator be used for across
One group of sensor pixel circuits in parallel executes integral to improve SNR.The sensor pixel circuits described in present specification
Accurate fingerprint recognition is provided in the case where no becket with fingerprint recognition system.
Although present specification includes many details, these are not construed as to any invention or can be wanted
Ask the limitation of the range of protection, but as can be specific to the description of the feature of the specific embodiment of specific invention.In this Shen
Certain features described in the context of separate embodiments realization can also please be combined in a single embodiment in file.Phase
Instead, the various features described in the context of single embodiment can also be in various embodiments individually or with any suitable
Sub-portfolio realize.In addition, although feature can as above be described as being exactly initially with certain combination operations and even such as
This is claimed, but in some cases can be from combination from combined one or more features claimed
Removal, and combination claimed can be for the variant of sub-portfolio or sub-portfolio.
Similarly, it is drawn in a particular order although operating in the accompanying drawings, this is understood not to need these
Operation is executed with shown particular order or in sequential order, or is needed to be implemented all operations shown and be can be only achieved
Desired result.In addition, the separation of the various system components in the embodiment described in present specification should not be understood to
To require this separation in all of the embodiments illustrated.
It only describes several realizations and example, and based on described in present specification and showing, can make
Others are realized, enhance and are changed.
Claims (5)
1. a kind of method restored from the latch mode of the equipment including finger sensor apparatus, which comprises
Initial check code stored in memory is read in the host-processor of the equipment；
The calculated check code of microcontroller by the finger sensor apparatus is read in the host-processor；
Compare the check code of the two readings for matching；And
It is based at least partially on the comparison and resets the microcontroller to restore from latch mode.
2. the method as described in claim 1, being wherein at least based in part on the comparison and resetting the microcontroller includes working as
The check code compared determines that the microcontroller is in the latch mode when mismatching.
3. a kind of electronic equipment, comprising:
Finger sensor apparatus, comprising:
It is configured to the sensor array of detection original fingerprint sensing data, and
The microcontroller communicated with the sensor array, the microcontroller are configured as calculating check code；And
With the host-processor of the electronic equipment of the micro-controller communications of the finger sensor apparatus, the host
Processor is configured as executing following operation, comprising:
Initial check code stored in memory is read,
The calculated check code of the microcontroller by the finger sensor apparatus is read,
Compare the check code of the two readings to obtain the instruction that the microcontroller is in latch mode, and
It is based at least partially on the comparison and resets the microcontroller to restore from the latch mode.
4. electronic equipment as claimed in claim 3, wherein the host-processor be configured as when the check code that compare not
Timing determines that the microcontroller is in the latch mode.
5. method as claimed in claim 3, wherein the electronic equipment includes smart phone, tablet computer, laptop computer
Or wearable device.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2014091179 | 2014-11-14 | ||
| CNPCT/CN2014/091179 | 2014-11-14 | ||
| CN201510782897.2A CN105608413B (en) | 2014-11-14 | 2015-11-16 | Fingerprint sensor latch recovery mechanism based on status monitoring and handshaking |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510782897.2A Division CN105608413B (en) | 2014-11-14 | 2015-11-16 | Fingerprint sensor latch recovery mechanism based on status monitoring and handshaking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108985284A true CN108985284A (en) | 2018-12-11 |
Family
ID=55988339
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811158162.2A Active CN109359571B (en) | 2014-11-14 | 2015-11-16 | Fingerprint sensor latch recovery mechanism based on status monitoring and handshaking |
| CN201510782897.2A Active CN105608413B (en) | 2014-11-14 | 2015-11-16 | Fingerprint sensor latch recovery mechanism based on status monitoring and handshaking |
| CN201811158155.2A Pending CN108985284A (en) | 2014-11-14 | 2015-11-16 | Latch Restoration Mechanism based on Stateful Inspection and the fingerprint sensor shaken hands |
| CN201811157084.4A Pending CN108985283A (en) | 2014-11-14 | 2015-11-16 | Latch Restoration Mechanism based on Stateful Inspection and the fingerprint sensor shaken hands |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811158162.2A Active CN109359571B (en) | 2014-11-14 | 2015-11-16 | Fingerprint sensor latch recovery mechanism based on status monitoring and handshaking |
| CN201510782897.2A Active CN105608413B (en) | 2014-11-14 | 2015-11-16 | Fingerprint sensor latch recovery mechanism based on status monitoring and handshaking |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811157084.4A Pending CN108985283A (en) | 2014-11-14 | 2015-11-16 | Latch Restoration Mechanism based on Stateful Inspection and the fingerprint sensor shaken hands |
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| WO2019100217A1 (en) * | 2017-11-21 | 2019-05-31 | 深圳市汇顶科技股份有限公司 | Biometric information transmission establishing method , device, system, and storage medium |
| CN117175498B (en) * | 2023-11-03 | 2024-03-22 | 深圳贝特莱电子科技股份有限公司 | Intelligent door lock fingerprint sensor protection circuit and method |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109359571B (en) | 2022-08-12 |
| CN105608413A (en) | 2016-05-25 |
| CN109359571A (en) | 2019-02-19 |
| CN105608413B (en) | 2020-04-28 |
| CN108985283A (en) | 2018-12-11 |
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Application publication date: 20181211 |