CN105608413A - Latch recovery mechanism of fingerprint sensor based on state monitoring and handshake - Google Patents
Latch recovery mechanism of fingerprint sensor based on state monitoring and handshake Download PDFInfo
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- CN105608413A CN105608413A CN201510782897.2A CN201510782897A CN105608413A CN 105608413 A CN105608413 A CN 105608413A CN 201510782897 A CN201510782897 A CN 201510782897A CN 105608413 A CN105608413 A CN 105608413A
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- microcontroller
- sensor apparatus
- finger sensor
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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
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- 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
The invention provides latch recovery mechanism of a fingerprint sensor based on state monitoring and handshake, and aims at providing a recovery device and method from the latch state of the fingerprint sensor. A microcontroller of the fingerprint sensor receives original sensor data from a sensor array in communication with the microcontroller; the received original sensor data is compared with a predetermined threshold; and at least part of power supplied to the fingerprint sensor is reset based on comparison so that recovery from the latch state is achieved.
Description
Technical field
The breech lock that the present invention relates to the sensor pixel circuit for using in fingerprint recognition recovers.
Background technology
Various electronic equipments or information system can adopt User identification mechanism to protect personal data and prevent undelegated visitAsk. User in electronic equipment or information system authenticates and can hold by individual's identification and the authentication method of one or more formsOK, comprising one or more biometric identifier. Biometric identifier can be used alone or as such as closeAdding of the conventional authentication method of code authentication method. The popular form of biometric identifier is individual fingerprint pattern. Fingerprint passesSensor can be built in electronic equipment to read user's fingerprint pattern, makes the equipment can only be by the fingerprint pattern of authorized userCertification carry out release by the authorized user of equipment. In some implementations, this fingerprint sensor can comprise having the user of being used toThe sensor pixel circuit of the pixelation pixel sensor cell of fingerprint pattern is caught in identification.
Summary of the invention
Present specification has been described for providing equipment, system and technology to be based in part on Stateful Inspection and handshake mechanism and has been carried out and refer toThe technology that the breech lock of line sensor circuit recovers.
The technology of describing in present specification can be provided for sensor pixel circuit from using fingerprint recognition systemThe mechanism of recovering in latch mode.
In one aspect, the method for recovering has been described from the latch mode of finger sensor apparatus. The method is included in fingerprint and passesThe microcontroller of sensor equipment receive from the original sensor data of the sensor array of micro-controller communications. The method comprisesThe original sensor data receiving and predetermined threshold are compared. The method comprises at least in part based on the comparison, and replacement is carriedSupply with the electric power of finger sensor apparatus to recover from latch mode.
The method can realize in every way, to comprise the one or more features in following characteristics. At least in part based onThe electric power that relatively replacement offers finger sensor apparatus to recover the comprising raw sensory when receiving from latch modeWhen failing to meet predetermined threshold, device data determine that fingerprint sensor is in latch mode. Replacement offers the electricity of finger sensor apparatusPower comprises: close low pressure drop (LDO) voltage-stablizer to close the electric power that offers finger sensor apparatus; Make one section of hold during power offTime to recover from latch mode; And again open LDO voltage-stablizer to recover to offer the electric power of finger sensor apparatus.
On the other hand, the method for recovering the latch mode of the equipment from comprising finger sensor apparatus has been described. The method bagDraw together at the host-processor of equipment and read the initial check code being stored in memory. The method be included in host-processor read byThe check code that the microcontroller of finger sensor apparatus calculates. The method comprise these two check codes that read of comparison forJoin; And the microcontroller of resetting based on the comparison at least in part to recover from latch mode.
The method can realize in every way, to comprise the one or more features in following characteristics. At least in part based onThe microcontroller of relatively resetting can not comprise in the time that check code relatively does not mate determines that microcontroller is in latch mode.
On the other hand, the method for recovering the latch mode of the equipment from comprising finger sensor apparatus has been described. The method bagDraw together the confirmation of shaking hands at the host-processor request of equipment and the microcontroller of finger sensor apparatus. The method comprises when determining micro-Controller has been failed the microcontroller of resetting while confirmation of shaking hands of request.
The method of describing in present specification can realize and not use additional hard in the equipment that comprises finger sensor apparatusPart.
On the other hand, finger sensor apparatus comprises the sensor array that detects original fingerprint sensing data; Be connected electrically in biographyBetween sensor array and power supply to control the power-supply controller of electric of electric power transfer from power supply to sensor array; And and sensor arrayThe microcontroller of communicating by letter with power-supply controller of electric. Microcontroller can be carried out following operation, comprising: receive and detect from sensor arrayThe original sensor data arriving; The original sensor data receiving and the predetermined threshold of instruction latch mode are compared, andAt least in part based on the comparison, so that being reset, power-supply controller of electric offers finger sensor apparatus to power-supply controller of electric transmitted signalElectric power to recover from latch mode.
Finger sensor apparatus can be realized in every way, to comprise the one or more features in following characteristics. For example,Power-supply controller of electric can comprise low pressure drop (LDO) voltage-stablizer. When the original sensor data receiving fails to meet predetermined thresholdTime, microcontroller can determine that fingerprint sensor is in latch mode. Microcontroller can transmitted signal, and it comprises powered-downController is to cut off the signal from the electric power of power supply. Microcontroller can make power-supply controller of electric keep close a period of time, withDuring this period of time, cut off the electricity supply and recover from latch mode. Microcontroller again opening power controller offers with recoveryThe electric power of finger sensor apparatus.
Again on the other hand, electronic equipment can comprise finger sensor apparatus. Finger sensor apparatus can comprise be configured to inspectionSurvey the sensor array of original fingerprint sensing data, and the microcontroller of communicating by letter with sensor array, microcontroller is configured toCalculation check code. Electronic equipment can comprise the host-processor with the micro-controller communications of finger sensor apparatus. Host processDevice can be carried out following operation, comprising: read the initial check code that is stored in memory, read by finger sensor apparatusCheck code, the instruction in latch mode with acquisition microcontroller of these two check codes that read of comparison that microcontroller calculates,And the microcontroller of resetting based on the comparison at least in part to recover from latch mode.
Electronic equipment can be realized in every way, to comprise the one or more features in following characteristics. For example,, when comparingCheck code while not mating, host-processor can determine that microcontroller is in latch mode. Electronic equipment can comprise intelligent handMachine, panel computer, kneetop computer or wearable device.
Again on the other hand, electronic equipment can comprise finger sensor apparatus. Finger sensor apparatus can comprise that detection is originalThe sensor array of fingerprint sensor data and the microcontroller of communicating by letter with sensor array. Electronic equipment can comprise with fingerprint and passingThe host-processor of the micro-controller communications of sensor equipment. Host-processor can be carried out following operation, comprising: request and fingerprintThe confirmation of shaking hands of the microcontroller of sensor device, and when determining that microcontroller failed shaking hands of the request micro-control of resetting while confirmingDevice processed.
Electronic equipment may be implemented as the one or more features that comprise in following characteristics. For example,, when host-processor is determined micro-Controller failed request shaking hands confirm time, host-processor can determine that microcontroller is in latch mode.
In some implementations, the breech lock of describing in present specification detects and recovers and can comprise finger sensor apparatus and specialIn the equipment of electrostatic discharge testing circuit hardware, realize.
For example, can comprise for the finger sensor apparatus of electronic equipment the sensor array that detects original fingerprint sensing dataRow; The microcontroller of communicating by letter with sensor array; And with the electrostatic discharge testing circuit of sensor array and micro-controller communications.Electrostatic discharge testing circuit can be carried out following operation, comprising: detect abnormal voltage or the current signal of instruction electrostatic discharge event,And operate with arrestment by microcontroller Bypass Clock signal.
Finger sensor apparatus can be realized in every way, to comprise the one or more features in following characteristics. For example,Electrostatic discharge testing circuit can make the abnormal voltage or the current signal that detect be discharged. Electrostatic discharge testing circuit can beAfter electric discharge, reactivate clock signal. Electrostatic discharge testing circuit can with micro-controller communications electrostatic discharge event.
Again aspect another, the finger sensor apparatus that electronic equipment comprises host-processor and communicates by letter with host-processor. Refer toLine sensor device comprises: be configured to detect the sensor array of original fingerprint sensing data, communicate by letter with sensor array micro-Controller and with the electrostatic discharge testing circuit of sensor array and micro-controller communications. Electrostatic discharge testing circuit can carry out withLower operation, comprising: detect abnormal voltage or the current signal of instruction electrostatic discharge event, and believe by microcontroller Bypass ClockNumber operate with arrestment.
Electronic equipment can be realized in every way, to comprise the one or more features in following characteristics. For example, static is putPower detection circuit can make the abnormal voltage or the current signal that detect be discharged. Electrostatic discharge testing circuit can be in electric dischargeAfter reactivate clock signal. The electrostatic discharge testing circuit electrostatic discharge event of can communicating by letter with host-processor with microcontroller.Host-processor can be carried out self-inspection and return to form and logical process. Microcontroller can be carried out self-inspection and return to form and logicProcess.
Again on the other hand, the method for recovering the latch mode of the electronic equipment from comprising finger sensor apparatus is disclosed. ShouldMethod is included in electrostatic discharge testing circuit and detects abnormal voltage or the current signal of indicating electrostatic discharge event; And Bypass Clock letterNumber to stop the mistake of the operation that causes electronic equipment.
The method can realize in every way, to comprise the one or more features in following characteristics. For example, the method canTo comprise the abnormal voltage or the current discharge that detect. The method reactivates clock signal after can being included in electric discharge. ShouldMethod can comprise to microcontroller and host-processor instruction electrostatic discharge event. The method can be included in host-processor and holdRow self-inspection and returning to form and logical process. The method can be included in microcontroller and carries out self-inspection and return to form and logic mistakeJourney.
In accompanying drawing, description and claim, described in more detail above and other aspect and realization.
Brief description of the drawings
Fig. 1 is the block diagram that is illustrated in the exemplary breech lock Restoration Mechanism realizing in the equipment with fingerprint sensor.
Fig. 2 is the process flow diagram flow chart for relatively detect the example process of latch mode based on raw sensor output data.
Fig. 3 is the process flow diagram flow chart of the example process for confirming to carry out breech lock detection based on check code and recover.
Fig. 4 is the process flow diagram flow chart of the example process for confirming to carry out breech lock detection based on shaking hands and recover.
Fig. 5 is the block diagram that is illustrated in another the exemplary breech lock Restoration Mechanism realizing in the equipment with fingerprint sensor.
Fig. 6 is the process flow diagram flow chart for detect the example process of latch mode based on static discharge (ESD).
Detailed description of the invention
Comprising in the equipment of fingerprint circuit, static discharge (ESD) can cause excessive power flows fingerprint circuit and equipment,Thereby cause the latch mode of fingerprint circuit and equipment. In addition, esd event can damage fingerprint circuit and equipment, and even rightThe user who contacts with equipment damages. Because the sensitive surface of pointing the equipment of carrying out fingerprint recognition near placement user is arrangedSensor electrode array (for example, condenser type or other), ESD can enter the equipment with fingerprint circuit. Touch-sensing tableFace can cause ESD with the user's of initiation fingerprint detection finger.
Because fingerprint circuit is often disposed in the physics close with other computation module of the equipment such as processor or controllerDistance, therefore causes near processor that the ESD of excessive power flows fingerprint circuit places can flowing through or controller and causesProcessor and controller break down. In present specification disclosed technical description for detection of latch mode and from detectTo latch mode in the mechanism recovered. The described mechanism for detection of latch mode therefrom recovery does not rely on or requirementAdditional circuit or other hardware. Can use such as host-processor and comprise finger sensor apparatus existing of microcontrollerHardware is realized described breech lock and is detected and Restoration Mechanism.
Fig. 1 is the block diagram that is illustrated in the exemplary breech lock Restoration Mechanism realizing in the equipment 100 with fingerprint sensor. Equipment 100It can be any electronic equipment that comprises the fingerprint sensor for secure access is provided to equipment 100. For example, equipment 100 canTo comprise portable set, such as smart mobile phone, panel computer, laptop computer, intelligent watch etc. Equipment 100 comprisesVarious electronic circuits and assembly, such as with the host-processor 102 (for example, chip) of finger sensor apparatus 110 communicative couplings.Host-processor 102 is communicated by letter with finger sensor apparatus 110, with the sensor array comprising from finger sensor apparatus 110106 receiving sensor data. Host-processor is by the micro controller unit (MCU) in execution and finger sensor apparatus 110104 shake hands communicated by letter with finger sensor apparatus 110. Once complete successfully between host-processor 102 and MCU104Shake hands, host-processor 102 and finger sensor apparatus 110 just can communicate with one another, with sending and receiving comprise request,The various signals of order, data etc. The example of the signal transmitting between host-processor 102 and MCU104 is in Fig. 1Be illustrated as Reference numeral 108.
MCU104 controls the operation of sensor array 106, comprises the electric power (PWCTR) that controls to sensor array 106.Electric power control can be by utilizing low pressure drop (LDO) voltage-stablizer to open and close from power supply (VDD) to sensor array 106Electric power carry out. In addition, the transmission of the various signals between MCU104 and sensor array 106 may comprise that TX (sends outSend), RX (reception) and I2C (internal integrated circuit). For example, can be in response to the request from MCU104, in the futureThe sensor output data of each sensor in autobiography sensor array 106 sends to MCU104. MCU104 can will connectThe sensing data of receiving is relaying or be forwarded to host-processor 102 after processing or before processing.
In the time that ESD or other interference can cause latch mode, finger sensor apparatus 110 and host-processor 102 can be subject toImpact. Fig. 2 is the process flow diagram flow chart for relatively detect the example process of latch mode based on raw sensor output data.The raw sensor output Data Detection of each sensor that can be based on from sensor array 106 is due to ESD or otherInterference enters the fingerprint sensor 106 of latch mode. MCU104 can receive original by the sensor from sensor array 106Data. In the time that MCU104 determines that the original sensor data receiving is larger than predetermined threshold, finger sensor apparatus 106 quiltsBe defined as not in latch mode. This normal operating is illustrated as normal circulation on the left-hand side of flow chart. Work as MCU104Determine when the original sensor data receiving is less than predetermined threshold, MCU104 determines that finger sensor apparatus 106 is in door boltLock status and MCU104 offer replacement the electric power of finger sensor apparatus 106, to recover from latch mode. FromThe process of recovering in latch mode can comprise closes LDO to close the electric power that offers finger sensor apparatus 106; Make electricityPower keeps closing in required a period of time recovering from latch mode; And again open LDO to recover to offer fingerprint sensingThe electric power of device equipment 106.
Fig. 3 is the process flow diagram flow chart of the example process for confirming to carry out breech lock detection based on check code and recover. Work as ESDOr when other interference effect MCU104, MCU104 self can enter latch mode. Can not carry out door bolt at MCU104In the situation that lock recovers, host-processor 102 can be carried out breech lock and recover. When MCU104 is during in latch mode, haveThe SRAM section of constant can change. Main frame is by relatively can be true by initial check code and the check code that calculated by MCU104Whether determine MCU104 in latch mode. The breech lock recovery process of being carried out by host-processor 102 can comprise: at the beginning of readingBeginning check code; Read the check code being calculated by MCU104; And relatively whether these two check codes mate. When these two schoolsTest code while not mating, host-processor 102 determines that MCU104 is in latch mode and by replacement MCU104. This differentNormal or latch mode is represented by the abnormal circulation on the right-hand side of process flow diagram flow chart. When host-processor 102 is determined these two schoolsWhile testing code coupling, host-processor 102 determines that MCU104 is not in latch mode and the MCU104 that will not reset. ThisNormal operating is represented by the normal circulation on the left-hand side of process flow diagram flow chart. Host-processor can continue these two verifications of comparisonCode, to determine that whether MCU104 is in latch mode.
Fig. 4 is the process flow diagram flow chart of the example process for confirming to carry out breech lock detection based on shaking hands and recover. In some realizationsIn, whether what host-processor 102 can be confirmed based on shaking hands completes definite MCU104 in latch mode. Work as MCU104In the time of latch mode, the code segment of MCU can be changed due to ESD or other interference. When the code segment of MCU is changedWhen change, host-processor 102 can not complete and the shaking hands of MCU104 in the situation that of its program fleet. Work as host-processor102 determine that, when MCU104 do not complete with the shaking hands of host-processor 102, host-processor determines that MCU104 is in door boltLock status and by replacement MCU104. This abnormal operation is represented by the abnormal circulation on the right-hand side of process flow diagram flow chart.Determine when host-processor 102 that MCU104 completes and shake hands while confirming, host-processor 102 determines that MCU104 is not in door boltLock status and host-processor 102 MCU that will not reset.
Fig. 5 is the frame that is illustrated in another the exemplary breech lock Restoration Mechanism realizing in the equipment 500 with fingerprint sensor 510Figure. Equipment 500 can be any electronic equipment comprising for the line sensor device of secure access is provided to equipment 500. ExampleAs, equipment 500 can comprise portable set, such as smart mobile phone, panel computer, laptop computer, intelligent watch etc.Equipment 500 comprises various electronic circuits and assembly, such as with the host-processor 502 of finger sensor apparatus 510 communicative couplings(for example, chip). Host-processor 502 is communicated by letter with finger sensor apparatus 510, with from finger sensor apparatus 510The sensor array 506 receiving sensor data that comprise. Host-processor 502 is logical via I/O (I/O) interface 508Cross carry out with finger sensor apparatus 510 in the shaking hands and finger sensor apparatus 510 of micro controller unit (MCU) 504Communication. Once complete successfully and shake hands between host-processor 502 and MCU504 main frame, host-processor 502 and referring toLine sensor device 510 just can communicate with one another and comprise the various signals of request, order, data etc. with sending and receiving. At figureMultiple examples of the signal transmitting between host-processor 502 and MCU504 via I/O interface 508 have been shown in 5.
MCU504 controls the operation of sensor array 506, comprises the electric power that controls to sensor array 506. Electric power controlCan be by utilizing LDO voltage-stablizer to carry out to the electric power of sensor array 506 from power supply (VDD) to open and close.In addition, the transmission of the various signals between MCU504 and sensor array 506 may comprise TX (transmission), RX (reception)And I2C (internal integrated circuit). For example, can be in response to the request from MCU504, autobiography sensor array 506 in the futureIn the sensor output data of each sensor send to MCU504. MCU504 can be by the sensing data receivingRelaying or be forwarded to host-processor 502 after processing or before processing.
In addition, esd detection circuit 512 is communicated by letter with sensor array 506 with MCU504, to be caused by esd eventAfter latch mode, complete Restoration Mechanism. Esd detection circuit 512 can prevent that the high-voltage signal being produced by esd event is directMutual with electronic equipment 500, this mutual meeting damage equipment 500. Esd detection circuit can utilize and comprise esd discharge pipeOr the different circuit of circuit are realized.
For example, esd event can make high voltage (being conventionally greater than 4000V) signal enter I/O interface 508, thereby in increasingThe voltage of portion's power supply. Esd discharge pipe in esd detection circuit 512 can restricted internal power supply voltage increase exceed threshold valueLevel. Esd discharge pipe in esd detection circuit 512 can be opened, and discharges the electricity of storage before to enable I/O interfaceLotus, and form large electric current as abnormal current or form high voltage as abnormal voltage.
Fig. 6 is for utilizing esd detection circuit to detect the process flow diagram flow chart of the example process 600 of latch mode. Process 600In side, show leftward normal circulation and on right-hand side, show abnormal circulation. In abnormal circulation, when ESD detectsWhen circuit 512 detects due to the abnormal voltage of esd event generation or electric current, when esd detection circuit bypath system or equipmentClock (Digital and analog) carrys out halt system or equipment 500 operates to avoid contingent mistake under abnormal voltage or electric current.After abnormal current or voltage electric discharge a period of time, in the time that voltage or electric current are got back to normal operation range, esd detection circuit512 can reactivate system or equipment clock, and the abnormal conditions of notice host-processor 502 and MCU504 generation.Host-processor 502 and MCU504 can carry out self-inspection and recover corresponding environment (for example, state and logical process),Until complete Restoration Mechanism.
In the time that curtage is in normal operation range, process 600 operates in normal circulation.
Various realizations and the example of disclosed technology have been described. Disclosed technology has been utilized for storage by touch-sensing electricityThe integrator of the electric charge of container accumulation, utilize the voltage that is stored in the electric charge of parasitic capacitance for exporting variable voltage and adjustmentGenerator and utilized the sensor pixel circuit with special integrator, wherein special integrator is for across one group of parallel connectionSensor pixel circuit is carried out integration to improve SNR. Sensor pixel circuit and the fingerprint recognition in present specification, describedSystem provides accurate fingerprint recognition in the situation that there is no becket.
Although present specification comprises many details, these should not be interpreted as any invention maybe can be required protectionThe restriction of scope, but as can be specific to the description of the feature of the specific embodiment of specific invention. In present specificationSome feature of describing in the context of independent embodiment also can combine realization in single embodiment. On the contrary, in single realityExecute the various features described in routine context also can be in multiple embodiment individually or with the incompatible reality of any suitable subgroupExisting. In addition, although feature can as above be described to some combination operation and even initial like this claimed,But the one or more features from combination required for protection can be removed in some cases from combination, and institute's requirementThe combination of protection can be for the variant of sub-portfolio or sub-portfolio.
Similarly, draw although operate in the accompanying drawings with specific order, this be not appreciated that need these operation withShown particular order or carry out with continuous order, or need to carry out all operations that illustrate and just can reach the knot of expectationReally. The separation of the various system components in the embodiment describing in present specification in addition, is not appreciated that allIn embodiment, all need this separation.
Only describe several realizations and example, and based on described in present specification and illustrate, can make otherRealize, strengthen and change.
Claims (33)
1. a method of recovering from the latch mode of finger sensor apparatus, described method comprises:
Receive from the sensor array of described micro-controller communications at the microcontroller of described finger sensor apparatusOriginal sensor data;
The described original sensor data and the predetermined threshold that receive are compared; And
Based on described comparison, the electric power that replacement offers described finger sensor apparatus is with from latch mode at least in partRecover.
2. the method for claim 1, wherein relatively resets and offers described fingerprint based on described at least in partThe electric power of sensor device is to recover from latch mode to comprise that working as the described original sensor data receiving fails to meetWhen described predetermined threshold, determine that described fingerprint sensor is in latch mode.
3. the method for claim 1, the electric power that offers described finger sensor apparatus of wherein resetting comprises:
Close low dropout voltage regulator to close the electric power that offers described finger sensor apparatus;
Make hold during power off a period of time to recover from described latch mode; And
Again open described low dropout voltage regulator to recover to offer the electric power of described finger sensor apparatus.
4. a method of recovering from comprise the latch mode of equipment of finger sensor apparatus, described method comprises:
Read at the host-processor of described equipment the initial check code being stored in memory;
Read the check code being calculated by the microcontroller of described finger sensor apparatus at described host-processor;
Relatively these two check codes that read are for coupling; And
At least in part based on the described described microcontroller of relatively resetting to recover from latch mode.
5. method as claimed in claim 4, wherein at least in part based on the described described microcontroller bag of relatively resettingDo not draw together in the time that check code relatively does not mate and determine that described microcontroller is in described latch mode.
6. a method of recovering from comprise the latch mode of equipment of finger sensor apparatus, described method comprises:
In the confirmation of shaking hands of the host-processor request of described equipment and the microcontroller of described finger sensor apparatus; And
When determine described microcontroller failed request shake hands confirm time, the described microcontroller of resetting.
7. a finger sensor apparatus, comprising:
Sensor array, is configured to detect original fingerprint sensing data;
Power-supply controller of electric, is connected electrically between described sensor array and power supply to control from described power supply to described sensorThe electric power transfer of array; And
Microcontroller, communicates by letter with described power-supply controller of electric with described sensor array, and wherein said microcontroller is configured toCarry out following operation, comprising:
Receive the described original sensor data detecting from described sensor array;
The described original sensor data receiving and the predetermined threshold of instruction latch mode are compared, and
At least in part based on described comparison, to described power-supply controller of electric transmitted signal to make described power supply controlThink highly of and put the electric power that offers described finger sensor apparatus to recover from described latch mode.
8. finger sensor apparatus as claimed in claim 7, wherein said power-supply controller of electric comprises low dropout voltage regulator.
9. finger sensor apparatus as claimed in claim 7, wherein said microcontroller is configured to receiveWhen described original sensor data fails to meet described predetermined threshold, determine that described fingerprint sensor is in described breech lock shapeState.
10. finger sensor apparatus as claimed in claim 7, wherein said microcontroller is configured to transmitted signal,Described signal comprises closes described power-supply controller of electric to cut off the signal from the electric power of described power supply.
11. finger sensor apparatus as claimed in claim 10, wherein said microcontroller is configured to make described electricitySource controller keeps closing a period of time, to cut off during this period described power supply and to recover from described latch mode.
12. finger sensor apparatus as claimed in claim 10, wherein said microcontroller is configured to again openDescribed power-supply controller of electric is to recover to offer the electric power of described finger sensor apparatus.
13. 1 kinds of electronic equipments, comprising:
Finger sensor apparatus, comprising:
Be configured to detect the sensor array of original fingerprint sensing data, and
With the microcontroller that described sensor array is communicated by letter, described microcontroller is configured to calculation check code; And
With the host-processor of the described electronic equipment of the described micro-controller communications of described finger sensor apparatus, described masterMachine processor is configured to carry out following operation, comprising:
Read the initial check code being stored in memory,
Read the check code being calculated by the described microcontroller of described finger sensor apparatus,
Compare these two check codes that read to obtain the instruction of described microcontroller in latch mode, and
At least in part based on the described described microcontroller of relatively resetting to recover from described latch mode.
14. electronic equipments as claimed in claim 13, wherein said host-processor is configured to when verification relativelyWhen code does not mate, determine that described microcontroller is in described latch mode.
15. methods as claimed in claim 13, wherein said electronic equipment comprises smart mobile phone, panel computer, kneeMo(u)ld top half computer or wearable device.
16. 1 kinds of electronic equipments, comprising:
Finger sensor apparatus, comprising:
Be configured to detect the sensor array of original fingerprint sensing data, and
The microcontroller of communicating by letter with described sensor array; And
With the host-processor of the described electronic equipment of the described micro-controller communications of described finger sensor apparatus, described masterMachine processor is configured to carry out following operation, comprising:
The confirmation of shaking hands of the described microcontroller of request and described finger sensor apparatus, and
Fail shaking hands of the request described microcontroller of resetting while confirming when determining described microcontroller.
17. electronic equipments as claimed in claim 16, wherein said host-processor is configured to when determining described micro-Controller failed described request shaking hands confirm time, determine that described microcontroller is in latch mode.
18. 1 kinds of finger sensor apparatus for electronic equipment, comprising:
Be configured to detect the sensor array of original fingerprint sensing data;
The microcontroller of communicating by letter with described sensor array; And
With the electrostatic discharge testing circuit of described sensor array and described micro-controller communications, wherein said static discharge inspectionSlowdown monitoring circuit is configured to carry out following operation, comprising:
Detect abnormal voltage or the current signal of instruction electrostatic discharge event, and
Operate with arrestment by described microcontroller Bypass Clock signal.
19. finger sensor apparatus as claimed in claim 18, wherein said electrostatic discharge testing circuit is configured toThe described abnormal voltage or the current signal that detect are discharged.
20. finger sensor apparatus as claimed in claim 19, wherein said electrostatic discharge testing circuit is configured toAfter electric discharge, reactivate described clock signal.
21. finger sensor apparatus as claimed in claim 20, wherein said electrostatic discharge testing circuit is configured toWith electrostatic discharge event described in described micro-controller communications.
22. 1 kinds of electronic equipments, comprising:
Host-processor; And
With the finger sensor apparatus that described host-processor is communicated by letter, described finger sensor apparatus comprises:
Be configured to detect the sensor array of original fingerprint sensing data,
The microcontroller of communicating by letter with described sensor array, and
With the electrostatic discharge testing circuit of described sensor array and described micro-controller communications, wherein said staticDischarge detection circuit is configured to carry out following operation, comprising:
Detect abnormal voltage or the current signal of instruction electrostatic discharge event, and
Operate with arrestment by described microcontroller Bypass Clock signal.
23. electronic equipments as claimed in claim 22, wherein said electrostatic discharge testing circuit is configured such that inspectionThe described abnormal voltage or the current signal that measure are discharged.
24. electronic equipments as claimed in claim 23, wherein said electrostatic discharge testing circuit is configured in electric dischargeReactivate afterwards described clock signal.
25. electronic equipments as claimed in claim 24, wherein said electrostatic discharge testing circuit is configured to describedThe microcontroller described electrostatic discharge event of communicating by letter with described host-processor.
26. electronic equipments as claimed in claim 22, wherein said host-processor is configured to carry out self-inspection and extensiveMultiple state and logical process.
27. electronic equipments as claimed in claim 22, wherein said microcontroller is configured to carry out self-inspection and recoveryState and logical process.
28. 1 kinds of methods of recovering from comprise the latch mode of electronic equipment of finger sensor apparatus, described method bagDraw together:
Detect abnormal voltage or the current signal of instruction electrostatic discharge event at electrostatic discharge testing circuit; And
Bypass Clock signal is to stop the mistake of the operation that causes described electronic equipment.
29. methods as claimed in claim 28, also comprise the described abnormal voltage or the current discharge that detect.
30. methods as claimed in claim 29, are also included in electric discharge and reactivate described clock signal afterwards.
31. methods as claimed in claim 30, also comprise to described microcontroller and described host-processor instruction instituteState electrostatic discharge event.
32. methods as claimed in claim 28, be also included in described host-processor carry out self-inspection and return to form andLogical process.
33. methods as claimed in claim 28, are also included in described microcontroller and carry out self-inspection and return to form and patrolThe process of collecting.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811157084.4A CN108985283A (en) | 2014-11-14 | 2015-11-16 | Latch Restoration Mechanism based on Stateful Inspection and the fingerprint sensor shaken hands |
| CN201510782897.2A CN105608413B (en) | 2014-11-14 | 2015-11-16 | Fingerprint sensor latch recovery mechanism based on status monitoring and handshaking |
| CN201811158162.2A CN109359571B (en) | 2014-11-14 | 2015-11-16 | Fingerprint sensor latch recovery mechanism based on status monitoring and handshaking |
| CN201811158155.2A CN108985284A (en) | 2014-11-14 | 2015-11-16 | Latch Restoration Mechanism based on Stateful Inspection and the fingerprint sensor shaken hands |
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| CN201811158162.2A Division CN109359571B (en) | 2014-11-14 | 2015-11-16 | Fingerprint sensor latch recovery mechanism based on status monitoring and handshaking |
| CN201811157084.4A Division 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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| CN201811157084.4A Pending CN108985283A (en) | 2014-11-14 | 2015-11-16 | Latch Restoration Mechanism based on Stateful Inspection and the fingerprint sensor shaken hands |
| CN201811158155.2A Pending CN108985284A (en) | 2014-11-14 | 2015-11-16 | Latch Restoration Mechanism based on Stateful Inspection and the fingerprint sensor shaken hands |
| CN201811158162.2A Active CN109359571B (en) | 2014-11-14 | 2015-11-16 | Fingerprint sensor latch recovery mechanism based on status monitoring and handshaking |
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| CN201811158155.2A Pending CN108985284A (en) | 2014-11-14 | 2015-11-16 | Latch Restoration Mechanism based on Stateful Inspection and the fingerprint sensor shaken hands |
| CN201811158162.2A Active CN109359571B (en) | 2014-11-14 | 2015-11-16 | Fingerprint sensor latch recovery mechanism based on status monitoring and handshaking |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108064436A (en) * | 2017-11-21 | 2018-05-22 | 深圳市汇顶科技股份有限公司 | Biometric information transmission method for building up, device, system and storage medium |
| CN117175498A (en) * | 2023-11-03 | 2023-12-05 | 深圳贝特莱电子科技股份有限公司 | Intelligent door lock fingerprint sensor protection circuit and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101173578A (en) * | 2006-11-01 | 2008-05-07 | 芯微技术（深圳）有限公司 | Fingerprint collecting device and its method for automatically quitting locking mode |
| CN102347605A (en) * | 2010-08-04 | 2012-02-08 | 奕力科技股份有限公司 | Electrostatic discharge protection module |
| CN102968353A (en) * | 2012-10-26 | 2013-03-13 | 华为技术有限公司 | Fail address processing method and fail address processing device |
| CN104459422A (en) * | 2014-12-26 | 2015-03-25 | 环旭电子股份有限公司 | Power line interference test system and method |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6658597B1 (en) * | 1999-10-22 | 2003-12-02 | Industrial Technology Research Institute | Method and apparatus for automatic recovery of microprocessors/microcontrollers during electromagnetic compatibility (EMC) testing |
| US6661631B1 (en) * | 2000-09-09 | 2003-12-09 | Stmicroelectronics, Inc. | Automatic latchup recovery circuit for fingerprint sensor |
| US6597289B2 (en) * | 2001-07-31 | 2003-07-22 | Stmicroelectronics, Inc. | Fingerprint sensor power management detection of overcurrent |
| US20030097587A1 (en) * | 2001-11-01 | 2003-05-22 | Gulick Dale E. | Hardware interlock mechanism using a watchdog timer |
| US8231056B2 (en) * | 2005-04-08 | 2012-07-31 | Authentec, Inc. | System for and method of protecting an integrated circuit from over currents |
| CN101021885B (en) * | 2006-05-24 | 2010-05-12 | 杭州晟元芯片技术有限公司 | Method for protecting chip internal information security based on JTAG port control |
| US7882340B2 (en) * | 2007-07-31 | 2011-02-01 | Hewlett-Packard Development Company, L.P. | Fingerprint reader remotely resetting system and method |
| US9019067B2 (en) * | 2010-12-30 | 2015-04-28 | Sargent Manufacturing Company | Electronic lock with power failure control circuit |
| WO2013063744A1 (en) * | 2011-10-31 | 2013-05-10 | Guo Jun | Personal mini-intelligent terminal with combined verification electronic lock |
| CN103914664A (en) * | 2012-12-31 | 2014-07-09 | 比亚迪股份有限公司 | Controller and control method having interior memory bank protecting function |
| CN203552708U (en) * | 2013-10-21 | 2014-04-16 | 深圳光启创新技术有限公司 | Offline burning system for visible light receiving terminal |
| CN204595054U (en) * | 2015-04-01 | 2015-08-26 | 华南理工大学 | A kind of leak current detector for photovoltaic inverter |
-
2015
- 2015-11-16 CN CN201510782897.2A patent/CN105608413B/en active Active
- 2015-11-16 CN CN201811157084.4A patent/CN108985283A/en active Pending
- 2015-11-16 CN CN201811158155.2A patent/CN108985284A/en active Pending
- 2015-11-16 CN CN201811158162.2A patent/CN109359571B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101173578A (en) * | 2006-11-01 | 2008-05-07 | 芯微技术（深圳）有限公司 | Fingerprint collecting device and its method for automatically quitting locking mode |
| CN102347605A (en) * | 2010-08-04 | 2012-02-08 | 奕力科技股份有限公司 | Electrostatic discharge protection module |
| CN102968353A (en) * | 2012-10-26 | 2013-03-13 | 华为技术有限公司 | Fail address processing method and fail address processing device |
| CN104459422A (en) * | 2014-12-26 | 2015-03-25 | 环旭电子股份有限公司 | Power line interference test system and method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108064436A (en) * | 2017-11-21 | 2018-05-22 | 深圳市汇顶科技股份有限公司 | Biometric information transmission method for building up, device, system and storage medium |
| US11245531B2 (en) | 2017-11-21 | 2022-02-08 | Shenzhen GOODIX Technology Co., Ltd. | Method, apparatus and system for establishing biometric identification information transmission and storage medium |
| CN117175498A (en) * | 2023-11-03 | 2023-12-05 | 深圳贝特莱电子科技股份有限公司 | Intelligent door lock fingerprint sensor protection circuit and method |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108985283A (en) | 2018-12-11 |
| CN105608413B (en) | 2020-04-28 |
| CN109359571B (en) | 2022-08-12 |
| CN109359571A (en) | 2019-02-19 |
| CN108985284A (en) | 2018-12-11 |
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