CN111914816B - Ultra-low power fingerprint detection wake-up method, device and intelligent fingerprint door lock - Google Patents
Ultra-low power fingerprint detection wake-up method, device and intelligent fingerprint door lock Download PDFInfo
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- CN111914816B CN111914816B CN202010927686.4A CN202010927686A CN111914816B CN 111914816 B CN111914816 B CN 111914816B CN 202010927686 A CN202010927686 A CN 202010927686A CN 111914816 B CN111914816 B CN 111914816B
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00563—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys using personal physical data of the operator, e.g. finger prints, retinal images, voicepatterns
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Abstract
The invention discloses an ultra-low power consumption fingerprint detection awakening method and device and an intelligent fingerprint door lock thereof, wherein the ultra-low power consumption fingerprint detection awakening method is applied to the intelligent fingerprint door lock, the intelligent fingerprint door lock comprises a detection area array and a fingerprint detection circuit arranged corresponding to the detection area array, the method comprises the steps of S100, periodically opening the fingerprint detection circuit, detecting user finger pressing operation of the detection area array, judging whether finger pressing information of the detection area array is detected by the fingerprint detection circuit, if yes, executing S200, otherwise, continuing executing S100, and sending an awakening command to the intelligent fingerprint door lock by the fingerprint detection circuit to carry out system awakening and fingerprint detection identification. The invention reduces the working time of the chip by subdividing the detection area array and the fingerprint detection circuit, greatly increases the dormancy time of the chip, realizes the ultra-low power consumption of the fingerprint detection stage, and realizes the unique functions of 'system wakeup' and 'fingerprint acquisition' by fingerprint detection.
Description
Technical Field
The invention relates to the technical field of ultra-low power consumption fingerprint detection awakening of intelligent fingerprint door locks, in particular to an ultra-low power consumption fingerprint detection awakening method and device and an intelligent fingerprint door lock thereof.
Background
The intelligent fingerprint door lock application requires to be in an extremely low power consumption state in an idle state, and a plurality of uA levels are usually required to be achieved, at the moment, most of components in the whole system are required to be in a power-off mode, and other electronic components are awakened when fingers are pressed by the only power-supply retention component, so that the whole door lock system is awakened to operate normally.
The main stream door lock system wake-up mode in the market comprises (1) detecting wake-up by a touch chip, wherein the touch chip is used for detecting finger pressing and triggering system wake-up operation, and is typically applied to an intelligent fingerprint door lock based on a tandem technology fingerprint identification sensor, (2) detecting wake-up by Bezel Ring, namely continuously transmitting pulse signals to metal Bezel Ring arranged in a module and detecting finger pressing by an integrating circuit, and triggering system wake-up operation, wherein the intelligent fingerprint door lock based on an FPC fingerprint identification sensor is typically applied.
Fingerprint sensor acquisition is a very power consuming process, typically reaching mA levels, even if the acquisition frame rate is slowed down, to tens of uA current on average. The power consumption level of the two methods can meet the requirement of the door lock, but the complexity of the system and the unreliability under certain scenes, such as a touch wakeup scheme, are increased, the sensitivity is not realized under the low temperature condition, the use limitation of a plurality of extremely cold areas is limited, and the Bezel Ring scheme increases the cost of the system. Therefore, development of a novel ultra-low power consumption fingerprint detection awakening method and device and an intelligent fingerprint door lock thereof is urgently needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing an ultra-low power consumption fingerprint detection awakening method and device and an intelligent fingerprint door lock thereof aiming at the defects in the prior art.
According to the first aspect of the invention, the invention provides an ultra-low power consumption fingerprint detection awakening method which is applied to an intelligent fingerprint door lock, wherein the intelligent fingerprint door lock comprises a detection area array and a fingerprint detection circuit which is correspondingly arranged with the detection area array, and the method comprises the following steps:
s100, periodically starting a fingerprint detection circuit to detect the finger pressing operation of a user of the detection area array, and judging whether the finger pressing information of the detection area array is detected by the fingerprint detection circuit, if so, executing S200, otherwise, continuing executing S100;
S200, the fingerprint detection circuit sends a wake-up command to the intelligent fingerprint door lock to perform system wake-up and fingerprint detection and identification.
Preferably, the detection area array is uniformly divided into a plurality of sub-detection area arrays, the detection area array comprises a first sub-detection area array, a second sub-detection area array, a third sub-detection area array, a fourth sub-detection area array and a fifth sub-detection area array, and the second sub-detection area array, the third sub-detection area array, the fourth sub-detection area array and the fifth sub-detection area array are positioned on the periphery of the first sub-detection area array.
Preferably, the fingerprint detection circuit is divided into a plurality of sub-detection circuits, the fingerprint detection circuit comprises a first sub-detection circuit, a second sub-detection circuit, a third sub-detection circuit, a fourth sub-detection circuit and a fifth sub-detection circuit, and the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit are located on the periphery of the first sub-detection circuit.
Preferably, the first sub-detection circuit, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit are respectively arranged in one-to-one correspondence with the first sub-detection area array, the second sub-detection area array, the third sub-detection area array, the fourth sub-detection area array and the fifth sub-detection area array.
Preferably, the first sub-detection circuit is located at a central position of the fingerprint detection circuit, and the first sub-detection area array is located at a central position of the detection area array.
Preferably, the fingerprint detection circuit comprises n×m detection unit circuits, the sub-detection circuit comprises k×l detection unit circuits, the detection area array is a detection area of the n×m detection unit circuits, and the sub-area array is a detection area of the k×l detection unit circuits.
Preferably, the fingerprint detection circuit is a time division multiplexing detection circuit, and further controls the first sub-detection circuit, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit to be started or closed in a time division mode respectively.
Preferably, the step S100 specifically includes:
S101, periodically starting a first sub-detection circuit, and detecting the pressing operation of the user fingers of the first sub-detection area array;
s102, judging whether the first sub-detection circuit detects finger pressing information of the first sub-detection area array or not, if yes, executing S103, otherwise, executing S101;
S103, starting a second sub-detection circuit, a third sub-detection circuit, a fourth sub-detection circuit and/or a fifth sub-detection circuit to respectively detect finger pressing information of the corresponding second sub-detection area array, third sub-detection area array, fourth sub-detection area array and/or fifth sub-detection area array;
S104, judging whether the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and/or the fifth sub-detection circuit detect the finger pressing information, if yes, executing S200, and if no, executing S101.
Preferably, the step S103 specifically includes:
and sequentially starting the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and/or the fifth sub-detection circuit to respectively detect finger pressing information of the corresponding second sub-detection area array, third sub-detection area array, fourth sub-detection area array and/or fifth sub-detection area array.
According to another aspect of the present invention, there is further provided an ultra-low power consumption fingerprint detection wake-up device, configured to execute the above-described ultra-low power consumption fingerprint detection wake-up method, where the ultra-low power consumption fingerprint detection wake-up device includes a detection area array and a fingerprint detection circuit corresponding to the detection area array;
The detection area array is used for receiving the pressing operation of the fingers of the user;
The fingerprint detection circuit is opened periodically and is used for detecting the finger pressing operation of a user of the detection area array, judging whether the finger pressing information of the detection area array is detected or not, and sending a wake-up command to the intelligent fingerprint door lock to perform system wake-up and fingerprint detection and identification when the finger pressing information of the detection area array is detected.
Preferably, the detection area array is uniformly divided into a plurality of sub-detection area arrays, and the detection area array comprises a first sub-detection area array, a second sub-detection area array, a third sub-detection area array, a fourth sub-detection area array and a fifth sub-detection area array, wherein the second sub-detection area array, the third sub-detection area array, the fourth sub-detection area array and the fifth sub-detection area array are positioned on the periphery side of the first sub-detection area array;
the fingerprint detection circuit is uniformly divided into a plurality of sub-detection circuits, and comprises a first sub-detection circuit, a second sub-detection circuit, a third sub-detection circuit, a fourth sub-detection circuit and a fifth sub-detection circuit, wherein the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit are positioned on the periphery of the first sub-detection circuit;
The first sub-detection circuit, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit are respectively arranged in one-to-one correspondence with the first sub-detection area array, the second sub-detection area array, the third sub-detection area array, the fourth sub-detection area array and the fifth sub-detection area array.
Preferably, the first sub-detection circuit is located at a central position of the fingerprint detection circuit, and the first sub-detection area array is located at a central position of the detection area array.
Preferably, the fingerprint detection circuit comprises n×m detection unit circuits, the sub-detection circuit comprises k×l detection unit circuits, the detection area array is a detection area of the n×m detection unit circuits, and the sub-area array is a detection area of the k×l detection unit circuits.
Preferably, the fingerprint detection circuit is a time division multiplexing detection circuit, and further controls the first sub-detection circuit, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit to be started or closed in a time division mode respectively.
According to still another aspect of the present invention, there is further provided an ultra-low power consumption fingerprint sensor, including the ultra-low power consumption fingerprint detection wake-up device described above, where the fingerprint detection wake-up device is configured to perform the ultra-low power consumption fingerprint detection wake-up method described above.
According to still another aspect of the present invention, there is also provided an ultra-low power consumption intelligent fingerprint door lock, including the ultra-low power consumption fingerprint sensor described above.
The technical scheme for implementing the ultra-low power consumption fingerprint detection awakening method and device and the intelligent fingerprint door lock has the advantages that the detection awakening is realized by subdividing the detection area array into a plurality of sub-detection area arrays and subdividing the fingerprint detection circuit into a plurality of sub-detection circuits, and the plurality of sub-detection circuits are opened in a time-sharing manner, so that the working time of a chip is reduced, the sleep time of the chip is greatly prolonged, the ultra-low power consumption of a fingerprint detection stage is realized, and the unique functions of 'system awakening' and 'fingerprint acquisition' are realized by fingerprint detection.
Drawings
For a clearer description of the technical solutions of embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art, in which:
FIG. 1 is a schematic flow chart of an embodiment of a wake-up method for ultra-low power fingerprint detection according to the present invention;
FIG. 2 is a detailed flow chart of an embodiment of the ultra-low power fingerprint detection wake-up method of the present invention;
FIG. 3 is a schematic diagram of an embodiment of an ultra low power fingerprint detection wake-up device according to the present invention;
FIG. 4 is a schematic diagram of a comparison of detection area arrays of an embodiment of the ultra-low power fingerprint detection wake-up device of the present invention;
Fig. 5 is a low power flow chart of an embodiment of the ultra-low power fingerprint detection wake-up device of the present invention.
Detailed Description
For a better understanding of the objects, technical solutions and advantages of the present invention, reference should be made to the various exemplary embodiments described hereinafter with reference to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary embodiments in which the invention may be practiced, and in which like numerals in the various figures designate identical or similar elements unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. It is to be understood that they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure as set forth in the appended claims, other embodiments may be utilized, or structural and functional modifications may be made to the embodiments set forth herein, without departing from the scope and spirit of the present disclosure. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to illustrate the technical scheme of the invention, the following description is made by specific examples.
At present, fingerprint acquisition of a fingerprint sensor is a very power-consuming process, and generally reaches mA level, even if the acquisition frame rate is slowed down, the average current reaches tens uA, the fingerprint sensor is internally provided with a fingerprint detection circuit at the beginning of design, fingerprint detection (FD, finger Detect) is a process which takes very short time, and only tens US (microseconds), so that the fingerprint detection can realize the unique functions of 'system wakeup' and 'fingerprint acquisition', and the design thought of humanization is deeply accepted by the field of intelligent fingerprint door locks. As shown in fig. 3, when the detection area array is large (left image), the fingerprint detection circuit has long duration and high power consumption, so that by reducing the detection area array (right image), the chip operating time is reduced, the chip sleep time is increased, and the low power consumption of the fingerprint detection stage is realized.
Embodiment one:
As shown in fig. 1-2, the invention provides an embodiment of a fingerprint detection awakening method with ultra-low power consumption, which is applied to an intelligent fingerprint door lock, wherein the intelligent fingerprint door lock comprises a detection area array and a fingerprint detection circuit correspondingly arranged with the detection area array, and the method comprises the following steps:
S100, periodically starting a fingerprint detection circuit to detect finger pressing operation of a user of the detection area array, judging whether finger pressing information of the detection area array is detected by the fingerprint detection circuit, if yes, executing S200, if not, continuously executing S100, specifically, periodically starting the interval time of the fingerprint detection circuit, wherein the interval time can be preset through a logic unit or a chip and the like, and further, the fingerprint detection circuit is automatically and periodically started.
S200, the fingerprint detection circuit sends a wake-up command to the intelligent fingerprint door lock to perform system wake-up and fingerprint detection and identification.
In this embodiment, the fingerprint detection circuit is configured to detect a user finger pressing operation of the detection area array (i.e. obtain finger pressing information of a user) in real time, and perform fingerprint detection and identification on the user finger pressing information. When the fingerprint detection circuit detects that the finger of a user presses the information, the fingerprint detection circuit sends a wake-up command to the intelligent fingerprint door lock to perform system wake-up and fingerprint detection and identification, specifically, the MCU of the intelligent fingerprint door lock is awakened to further unlock the fingerprint detection and identification, and subsequent unlocking actions are performed. At present, the finger pressing information of the user is detected only through the fingerprint detection circuit, so that the power consumption is very low, and the intelligent fingerprint door lock is very suitable for intelligent fingerprint door locks.
In this embodiment, the fingerprint detection circuit is periodically turned on, and is configured to detect a user finger pressing operation of the detection area array, determine whether finger pressing information of the detection area array is detected, and send a wake-up command to the intelligent fingerprint door lock to perform system wake-up and fingerprint detection and identification when the finger pressing information of the detection area array is detected.
In this embodiment, as shown in fig. 3, the detection area array is a detection area of the fingerprint detection circuit and is used for receiving the pressing operation of the finger of the user, where the detection area array is divided into a plurality of sub-detection area arrays, and the number of the sub-detection area arrays can be 3, 4, 5, and 6. For better description, only 5 sub-detecting arrays are taken as an example, for example, the detecting arrays include a first sub-detecting array, a second sub-detecting array, a third sub-detecting array, a fourth sub-detecting array and a fifth sub-detecting array, wherein the second sub-detecting array, the third sub-detecting array, the fourth sub-detecting array and the fifth sub-detecting array are located at the periphery of the first sub-detecting array, and specifically, the sub-detecting array, the first sub-detecting array, the second sub-detecting array, the third sub-detecting array, the fourth sub-detecting array and the fifth sub-detecting array are only different in terms of names and setting positions.
Specifically, the fingerprint detection circuit is equally divided into a plurality of sub-detection circuits, and the number of sub-detection circuits can be 3,4, 5, 6. For better description, only 5 sub-detection circuits are taken as an example, and for example, the fingerprint detection circuit includes a first sub-detection circuit, a second sub-detection circuit, a third sub-detection circuit, a fourth sub-detection circuit, and a fifth sub-detection circuit, where the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit, and the fifth sub-detection circuit are located on the periphery of the first sub-detection circuit, and the specific sub-detection circuit, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit, and the fifth sub-detection circuit differ only in name and installation position.
Specifically, the first sub-detection circuit, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit are respectively and correspondingly arranged with the first sub-detection area array, the second sub-detection area array, the third sub-detection area array, the fourth sub-detection area array and the fifth sub-detection area array, and are used for respectively detecting the pressing operation of the fingers of the user corresponding to the sub-detection area arrays. More specifically, the first sub-detection circuit is located at the center of the fingerprint detection circuit, and correspondingly, the first sub-detection area array is located at the center of the detection area array.
According to the finger pressing habit, the first sub-detection area array is usually arranged in the center of the detection area array, but in order to prevent erroneous judgment caused by noise or erroneous touching of the center position area, the sampling accumulated value of some detection area array areas around the center position area is judged in addition to the set threshold value, if the normal finger pressing is performed, the covered detection area array area is usually larger, and some detection area array areas around the covered detection area array area are also capable of meeting the threshold value judgment (at least one sub-detection area array area is met).
Specifically, the fingerprint detection circuit comprises N (N rows) x M (M columns) detection unit circuits, the sub-detection circuit comprises K (K rows) x L (L rows) detection unit circuits, and further, the whole fingerprint detection circuit comprises (N/K) x (M/L) sub-detection circuits, the detection area array corresponds to the detection areas of the N x M detection unit circuits, the sub-area array corresponds to the detection areas of the K x L detection unit circuits, and further, the whole detection area array comprises (N/K) x (M/L) sub-detection area arrays. For example, each of the first sub-detection circuit, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit is actually a sub-detection circuit (namely, a corresponding sub-detection area array) formed by 2 rows and 8 columns of detection unit circuits, and 16 detection unit circuits are arranged inside.
In this embodiment, the fingerprint detection circuit may be a time division multiplexing detection circuit, so as to control the first sub-detection circuit, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit, and the fifth sub-detection circuit to be turned on or off in a time division manner. In particular, the fingerprint detection circuit can be a complete detection circuit which is controlled by time-sharing multiplexing, preferably, each sub detection circuit can realize the switching of sub detection area array areas by changing row/column addresses, namely, in the fingerprint detection stage, other sub detection circuits are all in a closed state, and only the first sub detection circuit, the second sub detection circuit, the third sub detection circuit, the fourth sub detection circuit and the fifth sub detection circuit can be periodically started to ensure the ultra-low power consumption of the whole fingerprint detection circuit. In addition, the area distribution of the sub-detection area arrays is mainly used for dispersing as much as possible, ensuring accurate detection and identification and waking up the system.
In this embodiment, the step S100 specifically includes:
S101, periodically starting a first sub-detection circuit, and detecting the pressing operation of the user fingers of the first sub-detection area array.
S102, judging whether the first sub-detection circuit detects finger pressing information of the first sub-detection area array, if yes, executing S103, and if not, executing S101.
S103, starting the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and/or the fifth sub-detection circuit to respectively detect finger pressing information of the corresponding second sub-detection area array, third sub-detection area array, fourth sub-detection area array and/or fifth sub-detection area array.
Specifically, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and/or the fifth sub-detection circuit may be turned on in sequence to detect finger pressing information of the corresponding second sub-detection area array, third sub-detection area array, fourth sub-detection area array and/or fifth sub-detection area array, respectively.
S104, judging whether the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and/or the fifth sub-detection circuit detect the finger pressing information, if yes, executing S200, and if no, executing S101.
As shown in fig. 5, step S104 is specifically configured to, once the finger pressing information of the first sub-detection area array 1 is detected, sequentially and sequentially start the sub-fingerprint detection circuits corresponding to the second sub-detection area array 2, the third sub-detection area array 3, the fourth sub-detection area array 4, and the fifth sub-detection area array 5, and after the pressing of 1 or more sub-detection area arrays is detected in the 4 sub-detection area arrays, judge that the fingerprint detection is completed, and wake up the door lock system and perform fingerprint detection identification.
According to the invention, the detection area array is subdivided into a plurality of sub-detection area arrays, the fingerprint detection circuit is subdivided into a plurality of sub-detection circuits, and the plurality of sub-detection circuits are opened in a time-sharing manner, so that the working time of a chip is reduced, the dormancy time of the chip is greatly prolonged, the ultra-low power consumption of the fingerprint detection stage is realized, and the unique functions of 'system wakeup' and 'fingerprint acquisition' are realized by fingerprint detection.
Embodiment two:
The embodiment provides an ultralow-power-consumption fingerprint detection awakening device, which is used for executing the ultralow-power-consumption fingerprint detection awakening method in the embodiment, and detailed operations are detailed in the embodiment, wherein the ultralow-power-consumption fingerprint detection awakening device comprises a detection area array and a fingerprint detection circuit arranged corresponding to the detection area array, the detection area array is specifically used as a detection area of the fingerprint detection circuit and used for receiving user finger pressing operation, the fingerprint detection circuit is periodically started and used for detecting the user finger pressing operation of the detection area array and judging whether finger pressing information of the detection area array is detected or not, and when the finger pressing information of the detection area array is detected, an awakening command is sent to an intelligent fingerprint door lock to perform system awakening and fingerprint detection identification.
In this embodiment, the fingerprint detection circuit is configured to detect a user finger pressing operation of the detection area array (i.e. obtain finger pressing information of a user) in real time, and perform fingerprint detection and identification on the user finger pressing information. When the fingerprint detection circuit detects that the finger of a user presses the information, the fingerprint detection circuit sends a wake-up command to the intelligent fingerprint door lock to perform system wake-up and fingerprint detection and identification, and specifically, the MCU of the intelligent fingerprint door lock is awakened to further perform fingerprint detection and identification and subsequent unlocking actions. The finger pressing information is detected only through the fingerprint detection circuit at present, so that the power consumption is very low, and the intelligent fingerprint door lock is very suitable for intelligent fingerprint door locks.
In this embodiment, the fingerprint detection circuit is periodically turned on, and is configured to detect a user finger pressing operation of the detection area array, determine whether finger pressing information of the detection area array is detected, and send a wake-up command to the intelligent fingerprint door lock to perform system wake-up and fingerprint detection and identification when the finger pressing information of the detection area array is detected. Specifically, the interval time for periodically starting the fingerprint detection circuit can be preset through a logic unit or a chip, etc., and then the fingerprint detection circuit is automatically and periodically started.
In this embodiment, the detection area array is a detection area of the fingerprint detection circuit and is configured to receive a finger pressing operation of a user, where the detection area array is uniformly divided into a plurality of sub detection area arrays, and the number of the sub detection area arrays may be 3, 4, 5, or 6. For better description, only 5 sub-detecting arrays are taken as an example, for example, the detecting arrays include a first sub-detecting array, a second sub-detecting array, a third sub-detecting array, a fourth sub-detecting array and a fifth sub-detecting array, wherein the second sub-detecting array, the third sub-detecting array, the fourth sub-detecting array and the fifth sub-detecting array are located at the periphery of the first sub-detecting array, and specifically, the sub-detecting array, the first sub-detecting array, the second sub-detecting array, the third sub-detecting array, the fourth sub-detecting array and the fifth sub-detecting array are only different in terms of names and setting positions.
Specifically, the fingerprint detection circuit is equally divided into a plurality of sub-detection circuits, and the number of sub-detection circuits can be 3,4, 5, 6. For better description, only 5 sub-detection circuits are taken as an example, and for example, the fingerprint detection circuit includes a first sub-detection circuit, a second sub-detection circuit, a third sub-detection circuit, a fourth sub-detection circuit, and a fifth sub-detection circuit, where the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit, and the fifth sub-detection circuit are located on the periphery of the first sub-detection circuit, and the specific sub-detection circuit, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit, and the fifth sub-detection circuit differ only in name and installation position.
Specifically, the first sub-detection circuit, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit are respectively arranged in one-to-one correspondence with the first sub-detection area array, the second sub-detection area array, the third sub-detection area array, the fourth sub-detection area array and the fifth sub-detection area array. Preferably, the first sub-detection circuit is located at the center of the fingerprint detection circuit, and the first sub-detection area array is located at the center of the detection area array.
In this embodiment, the first sub-detection circuit is periodically turned on to detect a finger pressing operation of the user of the first sub-detection area array and determine whether finger pressing information of the first sub-detection area array is detected, and the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and/or the fifth sub-detection circuit are sequentially turned on to respectively detect finger pressing information of the second sub-detection area array, the third sub-detection area array, the fourth sub-detection area array and/or the fifth sub-detection area array, and determine whether the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and/or the fifth sub-detection circuit detects the finger pressing information.
According to the finger pressing habit, the first sub-detection area array is usually arranged in the center of the detection area array, but in order to prevent erroneous judgment caused by noise or erroneous touching of the center position area, the sampling accumulated value of some detection area array areas around the central area is judged in addition to the set threshold value, if the normal finger pressing is performed, the covered detection area array area is usually larger, and some detection area array areas around the covered detection area array area are also capable of meeting the threshold value judgment (at least one sub-detection area array area is met).
The fingerprint detection circuit comprises N (N rows) and M (M columns) detection unit circuits, the sub-detection circuit comprises K (K rows) and L (L rows) detection unit circuits, the whole fingerprint detection circuit further comprises (N/K) and M/L) sub-detection circuits, the detection area array corresponds to the detection areas of the N and M detection unit circuits, the sub-area array corresponds to the detection areas of the K and L detection unit circuits, and the whole detection area array further comprises (N/K) and M/L sub-detection area arrays. For example, each of the first sub-detection circuit, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit is actually a sub-detection circuit (namely, a corresponding sub-detection area array) formed by 2 rows and 8 columns of detection unit circuits, and 16 detection unit circuits are arranged inside.
In this embodiment, the fingerprint detection circuit may be a time division multiplexing detection circuit, so as to control the first sub-detection circuit, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit, and the fifth sub-detection circuit to be turned on or off in a time division manner. In particular, the fingerprint detection circuit can be a complete detection circuit which is controlled by time-sharing multiplexing, preferably, each sub detection circuit can realize the switching of sub detection area array areas by changing row/column addresses, namely, in the fingerprint detection stage, other sub detection circuits are all in a closed state, and only the first sub detection circuit, the second sub detection circuit, the third sub detection circuit, the fourth sub detection circuit and the fifth sub detection circuit can be periodically started to ensure the ultra-low power consumption of the whole fingerprint detection circuit. In addition, the area distribution of the sub-detection area arrays is mainly used for dispersing as much as possible, ensuring accurate detection and identification and waking up the system.
According to the invention, the detection area array is subdivided into a plurality of sub-detection area arrays, the fingerprint detection circuit is subdivided into a plurality of sub-detection circuits, and the plurality of sub-detection circuits are opened in a time-sharing manner, so that the working time of a chip is reduced, the dormancy time of the chip is greatly prolonged, the ultra-low power consumption of the fingerprint detection stage is realized, and the unique functions of 'system wakeup' and 'fingerprint acquisition' are realized by fingerprint detection.
Embodiment III:
the invention provides an ultralow-power-consumption fingerprint sensor embodiment, which comprises the ultralow-power-consumption fingerprint detection awakening device in the second embodiment, wherein the fingerprint detection awakening device is used for executing the ultralow-power-consumption fingerprint detection awakening method in the first embodiment.
Embodiment four:
the invention also provides an ultralow-power-consumption intelligent fingerprint door lock embodiment, which comprises the ultralow-power-consumption fingerprint sensor described in the third embodiment.
According to the invention, the detection area array is subdivided into a plurality of sub-detection area arrays, the fingerprint detection circuit is subdivided into a plurality of sub-detection circuits, and the plurality of sub-detection circuits are opened in a time-sharing manner, so that the working time of a chip is reduced, the dormancy time of the chip is greatly prolonged, the ultra-low power consumption of the fingerprint detection stage is realized, and the unique functions of 'system wakeup' and 'fingerprint acquisition' are realized by fingerprint detection.
Those skilled in the art will appreciate, upon reading the description herein, that the various features described herein may be implemented by a method, a data processing system, or a computer program product. Thus, these features may be embodied in a form other than hardware, in a form entirely of software, or in a combination of hardware and software. Furthermore, the above-described features may also be embodied in the form of a computer program product stored on one or more computer-readable storage media having computer-readable program code segments or instructions embodied therein, which are stored in the storage media. The readable storage medium is configured to store various types of data to support operations at the apparatus. The readable storage medium may be implemented by any type or combination of volatile or non-volatile storage devices. Such as a hard disk, random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), optical storage, magnetic storage, flash memory, magnetic or optical disk, and/or combinations of the foregoing.
The foregoing is only a preferred embodiment of the application, and it will be appreciated by those skilled in the art that various changes in the features and embodiments may be made and equivalents may be substituted without departing from the spirit and scope of the application. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the application without departing from the essential scope thereof. Therefore, it is intended that the application not be limited to the particular embodiment disclosed, but that the application will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The ultra-low power consumption fingerprint detection awakening method is characterized by being applied to an intelligent fingerprint door lock, wherein the intelligent fingerprint door lock comprises a detection area array and a fingerprint detection circuit correspondingly arranged with the detection area array, and the method comprises the following steps:
S100, periodically starting the fingerprint detection circuit, detecting the finger pressing operation of a user of the detection area array, and judging whether the finger pressing information of the detection area array is detected by the fingerprint detection circuit, if so, executing S200, otherwise, continuing executing S100;
S200, the fingerprint detection circuit sends a wake-up command to the intelligent fingerprint door lock to perform system wake-up and fingerprint detection recognition, wherein the detection area array is uniformly divided into a plurality of sub detection area arrays, and the detection area arrays comprise a first sub detection area array, a second sub detection area array, a third sub detection area array, a fourth sub detection area array and a fifth sub detection area array, wherein the second sub detection area array, the third sub detection area array, the fourth sub detection area array and the fifth sub detection area array are positioned on the periphery of the first sub detection area array;
the fingerprint detection circuit is uniformly divided into a plurality of sub-detection circuits, and comprises a first sub-detection circuit, a second sub-detection circuit, a third sub-detection circuit, a fourth sub-detection circuit and a fifth sub-detection circuit, wherein the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit are positioned on the periphery of the first sub-detection circuit;
the first sub-detection circuit, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit are respectively arranged in one-to-one correspondence with the first sub-detection area array, the second sub-detection area array, the third sub-detection area array, the fourth sub-detection area array and the fifth sub-detection area array;
The first sub-detection circuit is positioned at the center of the fingerprint detection circuit, the first sub-detection area array is positioned at the center of the detection area array, the first sub-detection circuit, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit are periodically started, and the rest sub-detection circuits of the fingerprint detection circuit are all in a closed state.
2. The ultra-low power consumption fingerprint detection wake-up method of claim 1, wherein the fingerprint detection circuit comprises N x M detection unit circuits, and the sub-detection circuit comprises K x L detection unit circuits;
The detection area array is a detection area of N.M detection unit circuits, and the sub-detection area array is a detection area of K.L detection unit circuits.
3. The ultra-low power consumption fingerprint detection wake-up method of claim 1, wherein the fingerprint detection circuit is a time division multiplexed detection circuit, and further controls the first sub-detection circuit, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit to be turned on or off in a time division manner.
4. The ultra-low power consumption fingerprint detection wake-up method according to claim 1, wherein the step S100 specifically comprises:
S101, periodically starting the first sub-detection circuit, and detecting the pressing operation of the user fingers of the first sub-detection area array;
S102, judging whether the first sub-detection circuit detects the finger pressing information of the first sub-detection area array or not, if yes, executing S103, otherwise, executing S101;
S103, starting the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and/or the fifth sub-detection circuit to respectively detect finger pressing information of the corresponding second sub-detection area array, third sub-detection area array, fourth sub-detection area array and/or fifth sub-detection area array;
S104, judging whether the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and/or the fifth sub-detection circuit detect the finger pressing information, if yes, executing S200, and if no, executing S101.
5. The ultra-low power consumption fingerprint detection wake-up method according to claim 4, wherein the step S103 specifically comprises:
and sequentially starting the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and/or the fifth sub-detection circuit to respectively detect finger pressing information of the corresponding second sub-detection area array, third sub-detection area array, fourth sub-detection area array and/or fifth sub-detection area array.
6. An ultra-low power consumption fingerprint detection awakening device, which is characterized by being used for executing the ultra-low power consumption fingerprint detection awakening method according to any one of claims 1-5;
The ultra-low power consumption fingerprint detection awakening device comprises a detection area array and a fingerprint detection circuit correspondingly arranged with the detection area array;
The detection area array is a detection area of the fingerprint detection circuit and is used for receiving the pressing operation of the finger of a user;
The fingerprint detection circuit is periodically started and is used for detecting the finger pressing operation of a user of the detection area array and judging whether the finger pressing information of the detection area array is detected or not; when the finger pressing information of the detection area array is detected, a wakeup command is sent to the intelligent fingerprint door lock to perform system wakeup and fingerprint detection identification, wherein the detection area array is uniformly divided into a plurality of sub detection area arrays, the detection area arrays comprise a first sub detection area array, a second sub detection area array, a third sub detection area array, a fourth sub detection area array and a fifth sub detection area array, and the second sub detection area array, the third sub detection area array, the fourth sub detection area array and the fifth sub detection area array are positioned on the periphery of the first sub detection area array;
the fingerprint detection circuit is uniformly divided into a plurality of sub-detection circuits, and comprises a first sub-detection circuit, a second sub-detection circuit, a third sub-detection circuit, a fourth sub-detection circuit and a fifth sub-detection circuit, wherein the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit are positioned on the periphery of the first sub-detection circuit;
the first sub-detection circuit, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit are respectively arranged in one-to-one correspondence with the first sub-detection area array, the second sub-detection area array, the third sub-detection area array, the fourth sub-detection area array and the fifth sub-detection area array;
The first sub-detection circuit is positioned at the center of the fingerprint detection circuit, the first sub-detection area array is positioned at the center of the detection area array, the first sub-detection circuit, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit are periodically started, and the rest sub-detection circuits of the fingerprint detection circuit are all in a closed state.
7. The ultra-low power consumption fingerprint detection wake-up device of claim 6, wherein the fingerprint detection circuit comprises N x M detection unit circuits, and the sub-detection circuit comprises K x L detection unit circuits;
The detection area array is a detection area of N.M detection unit circuits, and the sub-detection area array is a detection area of K.L detection unit circuits.
8. The ultra-low power consumption fingerprint detection wake-up device of claim 6, wherein the fingerprint detection circuit is a time division multiplexed detection circuit, and further controls the first sub-detection circuit, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit to be turned on or off in a time division manner.
9. An ultra-low power consumption fingerprint sensor, comprising the ultra-low power consumption fingerprint detection wake-up device of any one of claims 6-8, wherein the fingerprint detection wake-up device is configured to perform the ultra-low power consumption fingerprint detection wake-up method of any one of claims 1-5.
10. An ultra-low power consumption intelligent fingerprint door lock, which is characterized by comprising the ultra-low power consumption fingerprint sensor as claimed in claim 9.
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| CN105893934A (en) * | 2016-03-07 | 2016-08-24 | 北京集创北方科技股份有限公司 | Fingerprint identification method and device and mobile terminal |
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