Ultra-low power fingerprint detection wake-up method, device and intelligent fingerprint door lock

Abstract

The present invention discloses an ultra-low power consumption fingerprint detection wake-up method, device and intelligent fingerprint door lock thereof. The ultra-low power consumption fingerprint detection wake-up method is applied to intelligent fingerprint door locks. The intelligent fingerprint door locks include a detection array and a fingerprint detection circuit corresponding to the detection array. The method includes: S100, periodically turning on the fingerprint detection circuit to detect the user's finger pressing operation on the detection array, and the fingerprint detection circuit determines whether the finger pressing information of the detection array is detected; if yes, S200 is executed; if not, S100 is continued to be executed; 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. The detection wake-up of the present invention subdivides the detection array and the fingerprint detection circuit, thereby reducing the chip working time, greatly increasing the chip sleep time, achieving ultra-low power consumption in the fingerprint detection stage, and achieving the unique function of fingerprint detection realizing "system wake-up" and "fingerprint collection" in one.

Description

Technical Field

[0001] The present invention relates to the technical field of ultra-low power consumption fingerprint detection and wake-up of intelligent fingerprint door locks, and more specifically, to an ultra-low power consumption fingerprint detection and wake-up method, device and intelligent fingerprint door lock thereof. Background Art

[0002] The application of smart fingerprint door locks requires extremely low power consumption when idle, usually reaching several uA level. At this time, most components in the entire system need to be in power-off mode. When a finger is pressed, the only power-retaining component wakes up other electronic components, thereby waking up the entire door lock system for normal operation.

[0003] The mainstream door lock system wake-up methods on the market include: (1) touch chip detection wake-up: a capacitive touch chip is used to detect finger pressure, triggering the system to wake up and run. A typical application is a smart fingerprint door lock based on Goodix Technology's fingerprint recognition sensor; (2) Bezel Ring detection wake-up: by continuously transmitting pulse signals to the metal BezelRing built into the module, and detecting finger pressure through an integral circuit, triggering the system to wake up and run. A typical application is a smart fingerprint door lock based on an FPC fingerprint recognition sensor.

[0004] The acquisition of fingerprint sensors is a very power-consuming process, usually reaching the mA level. Even if the acquisition frame rate is slowed down, the average current will reach tens of uA. Although the power consumption levels of the above two methods can meet the requirements of door locks, they increase the complexity of the system and its unreliability in certain scenarios. For example, the touch wake-up solution is not sensitive under low temperature conditions, which limits its use in many extremely cold areas; and the Bezel Ring solution increases the system cost. Therefore, it is urgent to develop a new ultra-low power fingerprint detection wake-up method, device and its smart fingerprint door lock. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an ultra-low power consumption fingerprint detection wake-up method, device and intelligent fingerprint door lock thereof in view of the above-mentioned defects of the prior art.

[0006] The technical solution adopted by the present invention to solve the technical problem is: according to the first aspect of the present invention, an ultra-low power consumption fingerprint detection wake-up method is provided, which is applied to an intelligent fingerprint door lock, and the intelligent fingerprint door lock includes a detection array and a fingerprint detection circuit corresponding to the detection array; the method includes the steps of:

[0007] S100, periodically turning on the fingerprint detection circuit to detect the user's finger pressing operation on the detection array, the fingerprint detection circuit determines whether the finger pressing information of the detection array is detected; if yes, executing S200; if not, continuing to execute S100;

[0008] S200, the fingerprint detection circuit sends a wake-up command to the smart fingerprint door lock to perform system wake-up and fingerprint detection and identification.

[0009] Preferably, the detection array is divided into a plurality of sub-detection arrays, and the detection array includes a first sub-detection array, a second sub-detection array, a third sub-detection array, a fourth sub-detection array and a fifth sub-detection array; the second sub-detection array, the third sub-detection array, the fourth sub-detection array and the fifth sub-detection array are located around the first sub-detection array.

[0010] Preferably, the fingerprint detection circuit is divided into multiple sub-detection circuits, and 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; the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit are located around the first sub-detection circuit.

[0011] 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 array, the second sub-detection array, the third sub-detection array, the fourth sub-detection array and the fifth sub-detection array.

[0012] Preferably, the first sub-detection circuit is located at the center of the fingerprint detection circuit, and correspondingly, the first sub-detection array is located at the center of the detection array.

[0013] Preferably, the fingerprint detection circuit includes N*M detection unit circuits, and the sub-detection circuit includes K*L detection unit circuits; the detection area array is the detection area of ​​N*M detection unit circuits, and the sub-area array is the detection area of ​​K*L detection unit circuits.

[0014] Preferably, the fingerprint detection circuit is a time-division multiplexing detection circuit, and then 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 controlled to start or shut down in time division.

[0015] Preferably, the step S100 specifically includes:

[0016] S101, periodically start the first sub-detection circuit to detect a user's finger pressing operation on the first sub-detection array;

[0017] S102, determining whether the first sub-detection circuit detects finger pressing information of the first sub-detection array; if yes, executing S103; if not, executing S101;

[0018] S103, turning on 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 array, third sub-detection array, fourth sub-detection array and / or fifth sub-detection array;

[0019] S104, determine whether the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and / or the fifth sub-detection circuit detect finger pressing information; if yes, execute S200; if not, execute S101.

[0020] Preferably, the step S103 is specifically:

[0021] The second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and / or the fifth sub-detection circuit are turned on in sequence to respectively detect the finger press information of the corresponding second sub-detection array, the third sub-detection array, the fourth sub-detection array and / or the fifth sub-detection array.

[0022] According to another aspect of the present invention, there is also provided an ultra-low power consumption fingerprint detection and wake-up device, which is used to execute the ultra-low power consumption fingerprint detection and wake-up method described above, and the ultra-low power consumption fingerprint detection and wake-up device includes a detection surface array and a fingerprint detection circuit corresponding thereto;

[0023] The detection array is used to receive finger pressing operations from the user;

[0024] The fingerprint detection circuit is periodically turned on to detect the user's finger pressing operation on the detection array and determine whether the finger pressing information of the detection array is detected; and when the finger pressing information of the detection array is detected, a wake-up command is issued to the smart fingerprint door lock to wake up the system and perform fingerprint detection and identification.

[0025] Preferably, the detection array is divided into a plurality of sub-detection arrays, and the detection array includes a first sub-detection array, a second sub-detection array, a third sub-detection array, a fourth sub-detection array and a fifth sub-detection array; the second sub-detection array, the third sub-detection array, the fourth sub-detection array and the fifth sub-detection array are located around the first sub-detection array;

[0026] The fingerprint detection circuit is divided into a plurality of sub-detection circuits, and 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; the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit are located around the first sub-detection circuit;

[0027] 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 array, the second sub-detection array, the third sub-detection array, the fourth sub-detection array and the fifth sub-detection array.

[0028] Preferably, the first sub-detection circuit is located at the center of the fingerprint detection circuit, and correspondingly, the first sub-detection array is located at the center of the detection array.

[0029] Preferably, the fingerprint detection circuit includes N*M detection unit circuits, and the sub-detection circuit includes K*L detection unit circuits; the detection area array is the detection area of ​​N*M detection unit circuits, and the sub-area array is the detection area of ​​K*L detection unit circuits.

[0030] Preferably, the fingerprint detection circuit is a time-division multiplexing detection circuit, and then 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 controlled to start or shut down in time division.

[0031] According to another aspect of the present invention, there is further provided an ultra-low power consumption fingerprint sensor, comprising the ultra-low power consumption fingerprint detection and wake-up device described above, wherein the fingerprint detection and wake-up device is used to execute the ultra-low power consumption fingerprint detection and wake-up method described above.

[0032] According to yet another aspect of the present invention, there is also provided an ultra-low power consumption smart fingerprint door lock, comprising the ultra-low power consumption fingerprint sensor described above.

[0033] The ultra-low power consumption fingerprint detection wake-up method, device and technical solution of intelligent fingerprint door lock of the present invention have the following advantages or beneficial effects: The detection wake-up of the present invention subdivides the detection array into multiple sub-detection arrays, and subdivides the fingerprint detection circuit into multiple sub-detection circuits, and starts multiple sub-detection circuits in time, thereby reducing the chip working time, greatly increasing the chip sleep time, achieving ultra-low power consumption in the fingerprint detection stage, and achieving the unique function of fingerprint detection realizing "system wake-up" and "fingerprint collection" in one. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. It is obvious that the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0035] Figure 1 It is a flow chart of an embodiment of the ultra-low power consumption fingerprint detection wake-up method of the present invention;

[0036] Figure 2 It is a detailed flow chart of an embodiment of the ultra-low power consumption fingerprint detection wake-up method of the present invention;

[0037] Figure 3 is a schematic diagram of an embodiment of an ultra-low power consumption fingerprint detection and wake-up device of the present invention;

[0038] Figure 4 2 is a schematic diagram showing a comparison of detection arrays of an embodiment of an ultra-low power consumption fingerprint detection and wake-up device of the present invention;

[0039] Figure 5 It is a low power consumption flow chart of an embodiment of an ultra-low power consumption fingerprint detection and awakening device of the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present invention clearer, the various exemplary embodiments to be described below will refer to the corresponding drawings, which constitute a part of the exemplary embodiments, wherein various exemplary embodiments that may be used to implement the present invention are described. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with the present disclosure. It should be understood that they are only examples of devices and methods consistent with some aspects of the present disclosure as detailed in the attached claims, and other embodiments may be used, or the embodiments listed herein may be modified in structure and function without departing from the scope and essence of the present invention. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details that hinder the description of the present invention.

[0041] In order to illustrate the technical solution of the present invention, a specific embodiment is provided below for illustration.

[0042] At present, fingerprint collection by fingerprint sensors is a very power-consuming process, usually reaching mA level. Even if the collection frame rate is slowed down, the average current will reach tens of uA. The fingerprint sensor of the present invention has a built-in fingerprint detection circuit at the beginning of its design. Fingerprint detection (FD) is a very short process, only tens of US (microseconds), so fingerprint detection can achieve the unique function of "system wake-up" and "fingerprint collection" in one. This highly humanized design idea is deeply recognized in the field of smart fingerprint door locks. Figure 3 As shown, when the detection array is large (left picture), the fingerprint detection circuit continues to work for a long time and consumes a lot of power. Therefore, by reducing the detection array (right picture), the chip working time is reduced and the chip sleep time is increased, thereby achieving low power consumption in the fingerprint detection stage.

[0043] Embodiment 1:

[0044] like Figure 1-2 As shown, the present invention provides an ultra-low power consumption fingerprint detection wake-up method embodiment, which is applied to a smart fingerprint door lock, wherein the smart fingerprint door lock includes a detection array and a fingerprint detection circuit corresponding to the detection array; the method includes the steps of:

[0045] S100, periodically turning on the fingerprint detection circuit to detect the user's finger pressing operation on the detection array, and the fingerprint detection circuit determines whether the finger pressing information of the detection array is detected; if yes, executing S200; if not, continuing to execute S100; specifically, the interval time for periodically turning on the fingerprint detection circuit can be pre-set through a logic unit or a chip, and then the fingerprint detection circuit is automatically turned on periodically.

[0046] S200, the fingerprint detection circuit sends a wake-up command to the smart fingerprint door lock to perform system wake-up and fingerprint detection and identification.

[0047] In this embodiment, the fingerprint detection circuit is used to detect the user's finger pressing operation on the detection array in real time (i.e., obtain the user's finger pressing information) and perform fingerprint detection and identification. When the fingerprint detection circuit detects the user's finger pressing information, the fingerprint detection circuit sends a wake-up command to the smart fingerprint door lock to wake up the system and detect and identify the fingerprint. Specifically, the MCU of the smart fingerprint door lock is awakened to start fingerprint detection and identification, as well as subsequent unlocking actions. Currently, the user's finger pressing information is only detected by the fingerprint detection circuit, and its power consumption is very low, which is very suitable for smart fingerprint door locks.

[0048] In this embodiment, the fingerprint detection circuit is periodically turned on to detect the user's finger pressing operation on the detection array and determine whether the finger pressing information of the detection array is detected; and when the finger pressing information of the detection array is detected, a wake-up command is issued to the smart fingerprint door lock to perform system wake-up and fingerprint detection and identification.

[0049] like Figure 3As shown, in this embodiment, the detection array is the detection area of ​​the fingerprint detection circuit, which is used to accept the user's finger pressing operation; the detection array is divided into multiple sub-detection arrays, the number can be 3, 4, 5, 6..., and the specific number is not limited here. For better description, only 5 sub-detection arrays are taken as an example. For example, the detection array includes the first sub-detection array, the second sub-detection array, the third sub-detection array, the fourth sub-detection array and the fifth sub-detection array; the second sub-detection array, the third sub-detection array, the fourth sub-detection array and the fifth sub-detection array are located on the periphery of the first sub-detection array; specifically, the sub-detection arrays, the first sub-detection array, the second sub-detection array, the third sub-detection array, the fourth sub-detection array and the fifth sub-detection array are only different in name and setting position.

[0050] Specifically, the fingerprint detection circuit is divided into a plurality of sub-detection circuits, the number of which can be 3, 4, 5, 6, etc., and the specific number is not limited here. For better description, here, only 5 sub-detection circuits are taken as an example, 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; the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit are located around the first sub-detection circuit; specifically, the 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 only different in name and setting position.

[0051] 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 array, the second sub-detection array, the third sub-detection array, the fourth sub-detection array and the fifth sub-detection array, and are used to respectively detect the user's finger pressing operation of the corresponding sub-detection array. More specifically, the first sub-detection circuit is located at the center of the fingerprint detection circuit, and correspondingly, the first sub-detection array is located at the center of the detection array.

[0052] According to the finger pressing habit, people usually press in the center of the detection array, and select the first sub-detection array to be set in the center position area of ​​the detection array. However, in order to prevent misjudgment due to noise or accidental contact with the center position area, in addition to detecting that the sampling cumulative value of the center position area exceeds the set threshold, the sampling cumulative values ​​of some surrounding detection array areas are also judged. If it is a normal finger press, the covered detection array area is usually relatively large, so some peripheral detection array areas can also meet the threshold judgment (at least greater than or equal to one sub-detection array area).

[0053] Specifically, the fingerprint detection circuit includes N (N rows) * M (M columns) detection unit circuits, the sub-detection circuit includes K (K rows) * L (L rows) detection unit circuits, and further, the entire fingerprint detection circuit includes (N / K) * (M / L) sub-detection circuits; correspondingly, the detection array is the detection area of ​​N*M detection unit circuits, the sub-array is the detection area of ​​K*L detection unit circuits, and further, the entire detection array includes (N / K) * (M / L) sub-detection arrays. For example, 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, each is actually a sub-detection circuit composed of 2 rows and 8 columns of detection unit circuits (i.e., the corresponding sub-detection array), which contains 16 detection unit circuits.

[0054] In this embodiment, the fingerprint detection circuit can be a time-division multiplexing detection circuit, and then 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 controlled to start or shut down in time-division. Specifically, the fingerprint detection circuit can be a complete detection circuit, which is controlled by time-division multiplexing; preferably, each sub-detection circuit can switch the sub-detection array area by changing the "row / column address", that is, in the fingerprint detection stage, the other sub-detection circuits are all in the off 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 will be started periodically to ensure ultra-low power consumption of the entire fingerprint detection circuit. In addition, the regional distribution of these sub-detection arrays is mainly to disperse as much as possible; to ensure accurate detection and identification, and wake up the system.

[0055] In this embodiment, the step S100 specifically includes:

[0056] S101 , periodically start the first sub-detection circuit to detect a user's finger pressing operation on the first sub-detection array.

[0057] S102, determining whether the first sub-detection circuit detects finger pressing information of the first sub-detection array; if yes, executing S103; if not, executing S101.

[0058] S103, turn on 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 the finger press information of the corresponding second sub-detection array, third sub-detection array, fourth sub-detection array and / or fifth sub-detection array.

[0059] Specifically, the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and / or the fifth sub-detection circuit can be turned on in sequence to respectively detect the finger pressure information of the corresponding second sub-detection array, third sub-detection array, fourth sub-detection array and / or fifth sub-detection array.

[0060] S104, determine whether the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and / or the fifth sub-detection circuit detect finger pressing information; if yes, execute S200; if not, execute S101.

[0061] like Figure 5 As shown, the step S104 is specifically as follows: once the finger pressure information of the first sub-detection array 1 is detected, the corresponding sub-fingerprint detection circuits of the second sub-detection array 2, the third sub-detection array 3, the fourth sub-detection array 4, and the fifth sub-detection array 5 are turned on in sequence. After the pressure of more than or equal to one sub-detection array is detected among the four sub-detection arrays, it can be determined that the fingerprint detection is completed, and then the door lock system is awakened and fingerprint detection and identification are performed.

[0062] The detection wake-up of the present invention subdivides the detection array into multiple sub-detection arrays, and subdivides the fingerprint detection circuit into multiple sub-detection circuits, and turns on the multiple sub-detection circuits in time-sharing, thereby reducing the chip working time, greatly increasing the chip sleep time, and achieving ultra-low power consumption in the fingerprint detection stage, so that fingerprint detection can achieve the unique function of "system wake-up" and "fingerprint collection" in one.

[0063] Embodiment 2:

[0064] The present embodiment provides an ultra-low power fingerprint detection wake-up device embodiment, which is used to execute the ultra-low power fingerprint detection wake-up method described in Embodiment 1. The detailed operation is described in Embodiment 1. The ultra-low power fingerprint detection wake-up device includes a detection array and a fingerprint detection circuit corresponding to it; specifically, the detection array is the detection area of ​​the fingerprint detection circuit, which is used to accept the user's finger pressing operation; the fingerprint detection circuit is periodically turned on to detect the user's finger pressing operation on the detection array, and determine whether the finger pressing information of the detection array is detected; and when the finger pressing information of the detection array is detected, a wake-up command is issued to the smart fingerprint door lock to wake up the system and detect and identify the fingerprint.

[0065] In this embodiment, the fingerprint detection circuit is used to detect the user's finger pressing operation on the detection array in real time (i.e., obtain the user's finger pressing information) and perform fingerprint detection and identification. When the fingerprint detection circuit detects the user's finger pressing information, the fingerprint detection circuit sends a wake-up command to the smart fingerprint door lock to wake up the system and detect and identify the fingerprint. Specifically, the MCU of the smart fingerprint door lock is awakened to perform fingerprint detection and identification, as well as subsequent unlocking actions. Currently, the finger pressing information is only detected by the fingerprint detection circuit, and its power consumption is very low, which is very suitable for smart fingerprint door locks.

[0066] In this embodiment, the fingerprint detection circuit is periodically turned on to detect the user's finger pressing operation on the detection array and determine whether the finger pressing information of the detection array is detected; and when the finger pressing information of the detection array is detected, a wake-up command is issued to the smart fingerprint door lock to wake up the system and detect and identify the fingerprint. Specifically, the interval time for periodically turning on the fingerprint detection circuit can be pre-set by a logic unit or chip, and then the fingerprint detection circuit is automatically turned on periodically.

[0067] In this embodiment, the detection array is the detection area of ​​the fingerprint detection circuit, which is used to accept the user's finger pressing operation; the detection array is divided into a plurality of sub-detection arrays, the number of which can be 3, 4, 5, 6..., and the specific number is not limited here. For better description, here, only 5 sub-detection arrays are taken as an example, for example, the detection array includes the first sub-detection array, the second sub-detection array, the third sub-detection array, the fourth sub-detection array and the fifth sub-detection array; the second sub-detection array, the third sub-detection array, the fourth sub-detection array and the fifth sub-detection array are located on the periphery of the first sub-detection array; specifically, the sub-detection arrays, the first sub-detection array, the second sub-detection array, the third sub-detection array, the fourth sub-detection array and the fifth sub-detection array are only different in name and setting position.

[0068] Specifically, the fingerprint detection circuit is divided into a plurality of sub-detection circuits, the number of which can be 3, 4, 5, 6, etc., and the specific number is not limited here. For better description, here, only 5 sub-detection circuits are taken as an example, 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; the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit are located around the first sub-detection circuit; specifically, the 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 only different in name and setting position.

[0069] 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 array, the second sub-detection array, the third sub-detection array, the fourth sub-detection array and the fifth sub-detection array. Preferably, the first sub-detection circuit is located at the center of the fingerprint detection circuit, and correspondingly, the first sub-detection array is located at the center of the detection array.

[0070] In this embodiment, the first sub-detection circuit is periodically turned on to detect the user's finger pressing operation on the first sub-detection array, and determine whether the finger pressing information of the first sub-detection array is detected; the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and / or the fifth sub-detection circuit are turned on in sequence to respectively detect the finger pressing information of the corresponding second sub-detection array, the third sub-detection array, the fourth sub-detection array and / or the fifth sub-detection 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 have detected the finger pressing information.

[0071] According to the finger pressing habit, the finger is usually pressed in the center of the detection array, and the first sub-detection array is selected to be set in the center position area of ​​the detection array. However, in order to prevent misjudgment due to noise or accidental contact with the center position area, in addition to detecting that the sampling cumulative value of the central area exceeds the set threshold, the sampling cumulative values ​​of some surrounding detection array areas are also judged. If it is a normal finger press, the covered detection array area is usually relatively large, so some peripheral detection array areas can also meet the threshold judgment (at least greater than or equal to one sub-detection array area).

[0072] Specifically, the fingerprint detection circuit includes N (N rows) * M (M columns) detection unit circuits, and the sub-detection circuit includes K (K rows) * L (L rows) detection unit circuits; further, the entire fingerprint detection circuit includes (N / K) * (M / L) sub-detection circuits; correspondingly, the detection array is the detection area of ​​N*M detection unit circuits, and the sub-array is the detection area of ​​K*L detection unit circuits, and further, the entire detection array includes (N / K) * (M / L) sub-detection arrays. For example, 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, each is actually a sub-detection circuit composed of 2 rows and 8 columns of detection unit circuits (i.e., the corresponding sub-detection array), which contains 16 detection unit circuits.

[0073] In this embodiment, the fingerprint detection circuit can be a time-division multiplexing detection circuit, and then 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 controlled to start or shut down in time-division. Specifically, the fingerprint detection circuit can be a complete detection circuit, which is controlled by time-division multiplexing; preferably, each sub-detection circuit can switch the sub-detection array area by changing the "row / column address", that is, in the fingerprint detection stage, the other sub-detection circuits are all in the off 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 will be started periodically to ensure ultra-low power consumption of the entire fingerprint detection circuit. In addition, the regional distribution of these sub-detection arrays is mainly to disperse as much as possible; to ensure accurate detection and identification, and wake up the system.

[0074] The detection wake-up of the present invention subdivides the detection array into multiple sub-detection arrays, and subdivides the fingerprint detection circuit into multiple sub-detection circuits, and turns on the multiple sub-detection circuits in time-sharing, thereby reducing the chip working time, greatly increasing the chip sleep time, and achieving ultra-low power consumption in the fingerprint detection stage, so that fingerprint detection can achieve the unique function of "system wake-up" and "fingerprint collection" in one.

[0075] Embodiment three:

[0076] The present invention provides an ultra-low power consumption fingerprint sensor embodiment, comprising the ultra-low power consumption fingerprint detection and awakening device described in the second embodiment, wherein the fingerprint detection and awakening device is used to execute the ultra-low power consumption fingerprint detection and awakening method described in the first embodiment.

[0077] Embodiment 4:

[0078] The present invention also provides an ultra-low power consumption smart fingerprint door lock embodiment, including the ultra-low power consumption fingerprint sensor described in embodiment three.

[0079] The detection wake-up of the present invention subdivides the detection array into multiple sub-detection arrays, and subdivides the fingerprint detection circuit into multiple sub-detection circuits, and turns on the multiple sub-detection circuits in time-sharing, thereby reducing the chip working time, greatly increasing the chip sleep time, and achieving ultra-low power consumption in the fingerprint detection stage, so that fingerprint detection can achieve the unique function of "system wake-up" and "fingerprint collection" in one.

[0080] After reading the contents described herein, it should be understood by those skilled in the art that the various features described herein can be implemented by methods, data processing systems or computer program products. Therefore, these features may not be implemented in hardware, all in software, or in a combination of hardware and software. In addition, the above features may also be implemented in the form of a computer program product stored on one or more computer-readable storage media, which contains a computer-readable program code segment or instruction, which is stored in a storage medium. The readable storage medium is configured to store various types of data to support the operation of the device. The readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof. Such as a static hard disk, a random access memory (SRAM), an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a programmable read-only memory (PROM), a read-only memory (ROM), an optical storage device, a magnetic storage device, a flash memory, a magnetic disk or an optical disk and / or a combination of the above devices.

[0081] The above are only preferred embodiments of the present invention. Those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the protection scope of the present invention.

Claims

1. An ultra-low power consumption fingerprint detection wake-up method, characterized in that: Applied to a smart fingerprint door lock, the smart fingerprint door lock includes a detection array and a fingerprint detection circuit corresponding to the detection array; the method includes the steps of: S100, periodically turning on the fingerprint detection circuit to detect the user's finger pressing operation on the detection array, and the fingerprint detection circuit determines whether the finger pressing information of the detection array is detected; if yes, executing S200; if not, continuing to execute S100; S200, the fingerprint detection circuit sends a wake-up command to the smart fingerprint door lock to wake up the system and detect and identify fingerprints; the detection array is divided into a plurality of sub-detection arrays, the detection array includes a first sub-detection array, a second sub-detection array, a third sub-detection array, a fourth sub-detection array and a fifth sub-detection array; the second sub-detection array, the third sub-detection array, the fourth sub-detection array and the fifth sub-detection array are located around the first sub-detection array; The fingerprint detection circuit is divided into a plurality of sub-detection circuits, and 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; the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit are located around 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 array, the second sub-detection array, the third sub-detection array, the fourth sub-detection array and the fifth sub-detection array; The first sub-detection circuit is located at the center of the fingerprint detection circuit, and correspondingly, the first sub-detection array is located at the center of the detection 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 remaining sub-detection circuits of the fingerprint detection circuit are in a closed state.

2. The ultra-low power consumption fingerprint detection wake-up method according to claim 1, characterized in that: The fingerprint detection circuit includes N*M detection unit circuits, and the sub-detection circuit includes K*L detection unit circuits; The detection surface array is the detection area of ​​N*M detection unit circuits, and the sub-detection surface array is the detection area of ​​K*L detection unit circuits.

3. The ultra-low power consumption fingerprint detection wake-up method according to claim 1, characterized in that: The fingerprint detection circuit is a time-division multiplexing detection circuit, which 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 start or shut down respectively in time division.

4. The ultra-low power consumption fingerprint detection wake-up method according to claim 1, characterized in that: The step S100 specifically includes: S101, periodically turning on the first sub-detection circuit to detect a user's finger pressing operation on the first sub-detection array; S102, determining whether the first sub-detection circuit detects finger pressing information of the first sub-detection array; if yes, executing S103; if not, executing S101; S103, turning on 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 array, third sub-detection array, fourth sub-detection array and / or fifth sub-detection array; S104, 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; if yes, execute S200; if not, execute S101.

5. The ultra-low power consumption fingerprint detection wake-up method according to claim 4, characterized in that: The step S103 is specifically as follows: 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 the finger press information of the corresponding second sub-detection array, the third sub-detection array, the fourth sub-detection array and / or the fifth sub-detection array.

6. An ultra-low power consumption fingerprint detection wake-up device, characterized in that: Used to execute the ultra-low power consumption fingerprint detection wake-up method according to any one of claims 1 to 5; The ultra-low power consumption fingerprint detection wake-up device comprises a detection surface array and a fingerprint detection circuit corresponding to the detection surface array; The detection array is the detection area of ​​the fingerprint detection circuit, which is used to receive the user's finger pressing operation; The fingerprint detection circuit is periodically turned on to detect the user's finger pressing operation on the detection array and determine whether the finger pressing information of the detection array is detected; and when the finger pressing information of the detection array is detected, a wake-up command is issued to the smart fingerprint door lock to wake up the system and detect and identify the fingerprint; the detection array is divided into a plurality of sub-detection arrays, and the detection array includes a first sub-detection array, a second sub-detection array, a third sub-detection array, a fourth sub-detection array and a fifth sub-detection array; the second sub-detection array, the third sub-detection array, the fourth sub-detection array and the fifth sub-detection array are located on the periphery of the first sub-detection array; The fingerprint detection circuit is divided into a plurality of sub-detection circuits, and 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; the second sub-detection circuit, the third sub-detection circuit, the fourth sub-detection circuit and the fifth sub-detection circuit are located around 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 array, the second sub-detection array, the third sub-detection array, the fourth sub-detection array and the fifth sub-detection array; The first sub-detection circuit is located at the center of the fingerprint detection circuit, and correspondingly, the first sub-detection array is located at the center of the detection 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 remaining sub-detection circuits of the fingerprint detection circuit are in a closed state.

7. The ultra-low power consumption fingerprint detection wake-up device according to claim 6, characterized in that: The fingerprint detection circuit includes N*M detection unit circuits, and the sub-detection circuit includes K*L detection unit circuits; The detection surface array is the detection area of ​​N*M detection unit circuits, and the sub-detection surface array is the detection area of ​​K*L detection unit circuits.

8. The ultra-low power consumption fingerprint detection wake-up device according to claim 6, characterized in that: The fingerprint detection circuit is a time-division multiplexing detection circuit, which 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 start or shut down respectively in time division.

9. An ultra-low power consumption fingerprint sensor, characterized in that: The invention comprises the ultra-low power consumption fingerprint detection and wake-up device as described in any one of claims 6 to 8, wherein the fingerprint detection and wake-up device is used to execute the ultra-low power consumption fingerprint detection and wake-up method as described in any one of claims 1 to 5.

10. An ultra-low power consumption smart fingerprint door lock, characterized in that: A fingerprint sensor with ultra-low power consumption comprising the method of claim 9.

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