Control method and device of circular fingerprint acquisition sensor and electronic equipment

Abstract

The invention provides a control method and device of a circular fingerprint acquisition sensor and electronic equipment, which are applied to a controller. The controller is connected with a capacitive fingerprint acquisition sensor in a preset circular area; the method comprises the following steps: S1, acquiring position information of the circular area, and acquiring a capacitance value of a fingerprint of a user through the capacitive fingerprint acquisition sensor; s2, marking an invalid area with a preset size corresponding to the circular area according to the position information; s3, determining a target capacitance value of the circular region in the capacitance values according to the invalid region and the capacitance values; and S4, determining fingerprint acquisition information of the user according to the target capacitance value. According to the method, the capacitive fingerprint acquisition sensor is designed to be circular, the invalid area is marked in the control process, and the invalid area is cut and then identified in the fingerprint identification process, so that the fingerprint acquisition precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fingerprint collection, and in particular to a control method, a device and an electronic device for a circular fingerprint collection sensor. Background Art

[0002] At present, the sensor setting area of ​​silicon-based capacitive collectors is generally square or rectangular, mainly due to process limitations. However, in the door lock application market, the silicon-based capacitive collection area is circular. The square collector is embedded in the circular fingerprint collection area, resulting in a reduction in the collection area, which affects the accuracy of the fingerprint algorithm and leads to the current low fingerprint collection accuracy. Summary of the invention

[0003] The purpose of the present invention is to provide a control method, device and electronic device for a circular fingerprint sensor to alleviate the current technical problem of low fingerprint collection accuracy and improve the fingerprint collection accuracy in the silicon-based capacitive collection area.

[0004] In a first aspect, an embodiment of the present invention provides a control method for a circular fingerprint collection sensor, which is applied to a controller; the controller is connected to a capacitive fingerprint collection sensor with a preset circular area; the method comprises: step S1: acquiring the position information of the circular area, and collecting the capacitance value of the user's fingerprint through the capacitive fingerprint collection sensor; step S2: marking an invalid area of ​​a preset size corresponding to the circular area according to the position information; step S3: determining a target capacitance value of the circular area in the capacitance value according to the invalid area and the capacitance value; step S4: determining the fingerprint collection information of the user according to the target capacitance value.

[0005] In a preferred embodiment of the present invention, the step of determining the target capacitance value of the circular area in the capacitance value based on the invalid area and the capacitance value includes: step S31: determining the invalid capacitance value in the capacitance value based on the invalid area; step S32: deleting the invalid capacitance value from the capacitance value to obtain the target capacitance value of the circular area in the capacitance value.

[0006] In a preferred embodiment of the present invention, the step of determining the fingerprint collection information of the above-mentioned user according to the above-mentioned target capacitance value includes: step S41: decoding the above-mentioned target capacitance value to obtain a fingerprint image; step S402: based on preset fingerprint features, judging whether there is a fingerprint in the above-mentioned fingerprint image; if yes, determining the fingerprint collection information of the above-mentioned user according to the above-mentioned fingerprint image; if not, repeating the above-mentioned steps S2 to S42 until there is a fingerprint in the above-mentioned fingerprint image, and determining the fingerprint collection information of the above-mentioned user according to the above-mentioned fingerprint image.

[0007] In a preferred embodiment of the present invention, the step of determining the fingerprint collection information of the user according to the fingerprint image includes: performing image enhancement on the fingerprint image to obtain an enhanced image; and determining the fingerprint collection information of the user according to the enhanced image.

[0008] In a preferred embodiment of the present invention, before the step of obtaining the position information of the circular area and collecting the capacitance value of the user's fingerprint through the capacitive fingerprint acquisition sensor, the method includes: when the controller and the capacitive fingerprint acquisition sensor are powered on, initializing the controller and the capacitive fingerprint acquisition sensor.

[0009] In a preferred embodiment of the present invention, when the controller and the capacitive fingerprint acquisition sensor are powered on, after the step of initializing the controller and the capacitive fingerprint acquisition sensor, the method includes: obtaining the initial capacitance value of the capacitive fingerprint acquisition sensor; the step of acquiring the capacitance value of the user's fingerprint through the capacitive fingerprint acquisition sensor includes: acquiring the current capacitance value of the user's fingerprint through the capacitive fingerprint acquisition sensor; and determining the capacitance value of the user's fingerprint acquired by the capacitive fingerprint acquisition sensor based on the current capacitance value and the initial capacitance value.

[0010] In a preferred embodiment of the present invention, the step of determining the capacitance value of the capacitive fingerprint acquisition sensor for collecting the user's fingerprint according to the current capacitance value and the initial capacitance value includes: determining the difference between the current capacitance value and the initial capacitance value as the capacitance value of the capacitive fingerprint acquisition sensor for collecting the user's fingerprint.

[0011] In a preferred embodiment of the present invention, the capacitive fingerprint acquisition sensor is disposed on a glass substrate.

[0012] In a second aspect, an embodiment of the present invention provides a control device for a circular fingerprint collection sensor, which is applied to a controller; the controller is connected to a capacitive fingerprint collection sensor of a preset circular area; the device includes: an acquisition module, which is used to obtain the position information of the circular area, and collect the capacitance value of the user's fingerprint through the capacitive fingerprint collection sensor; an invalid area determination module, which is used to mark an invalid area of ​​a preset size corresponding to the circular area according to the position information; a target capacitance value determination module, which is used to determine the target capacitance value of the circular area in the capacitance value according to the invalid area and the capacitance value; a fingerprint collection module, which is used to determine the fingerprint collection information of the user according to the target capacitance value.

[0013] In a third aspect, an embodiment of the present invention further provides an electronic device, comprising a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the control method of the circular fingerprint collection sensor.

[0014] The embodiments of the present invention have the following beneficial technical effects:

[0015] The embodiment of the present invention provides a control method, device and electronic device for a circular fingerprint sensor, which is applied to a controller; the controller is connected to a capacitive fingerprint sensor with a preset circular area; the method includes: step S1: obtaining the position information of the circular area, and collecting the capacitance value of the user's fingerprint through the capacitive fingerprint sensor; step S2: marking an invalid area of ​​a preset size corresponding to the circular area according to the position information; step S3: determining the target capacitance value of the circular area in the capacitance value according to the invalid area and the capacitance value; step S4: determining the fingerprint collection information of the user according to the target capacitance value. The method designs the capacitive fingerprint sensor into a circle, marks the invalid area during the control process, and cuts the invalid area before identification during the fingerprint recognition process, thereby improving the fingerprint collection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic flow chart of a control method for a circular fingerprint sensor provided by an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the structure of a traditional square fingerprint sensor provided by an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of the collection results of a traditional square fingerprint sensor provided in an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of the structure of a circular fingerprint sensor provided by an embodiment of the present invention;

[0021] Figure 5 A schematic flow chart of another method for controlling a circular fingerprint sensor provided by an embodiment of the present invention;

[0022] Figure 6 A schematic diagram of the structure of a control device for a circular fingerprint sensor provided by an embodiment of the present invention;

[0023] Figure 7 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention.

[0024] Icon: 10-square fingerprint sensor; 31-acquisition module; 32-invalid area determination module; 33-target capacitance value determination module; 34-fingerprint acquisition module; 41-processor; 42-memory; 43-bus; 44-communication interface. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Currently, embedding a square collector into a circular fingerprint collection area reduces the collection area, thereby affecting the accuracy of the fingerprint algorithm, resulting in low fingerprint collection accuracy.

[0027] Based on this, the embodiment of the present invention provides a control method, device and current equipment for a circular fingerprint sensor. The method designs the capacitive fingerprint sensor into a circle, marks the invalid area during the control process, and cuts the invalid area before identification during the fingerprint recognition process, thereby improving the fingerprint collection accuracy. To facilitate understanding of the embodiment of the present invention, a control method for a circular fingerprint sensor disclosed in the embodiment of the present invention is first introduced in detail.

[0028] Example 1

[0029] In this embodiment, Figure 1 A schematic flow chart of a control method for a circular fingerprint sensor provided by an embodiment of the present invention.

[0030] Wherein, the method is applied to a controller; the controller is connected to a capacitive fingerprint acquisition sensor in a preset circular area.

[0031] Furthermore, the capacitive fingerprint acquisition sensor is arranged on a glass substrate.

[0032] Depend on Figure 1 As can be seen, the above methods include:

[0033] Step S1: Acquire the position information of the circular area, and collect the capacitance value of the user's fingerprint through the capacitive fingerprint collection sensor.

[0034] For ease of understanding, Figure 2 A schematic diagram of the structure of a traditional square fingerprint sensor provided by an embodiment of the present invention; Figure 3 A schematic diagram of the collection results of a traditional square fingerprint sensor provided in an embodiment of the present invention.

[0035] Depend on Figure 2 As can be seen, when the traditional square fingerprint sensor 10 collects fingerprints, when the user's finger presses on the plane, most of the time a circular collection area 11 is formed, and the utilization rate of the surrounding four corners is very low. Therefore, to achieve the same fingerprint area, the circular area capacitive fingerprint collection sensor of the present application has a lower sensing area than the square one, thereby reducing the cost.

[0036] Step S2: According to the above position information, an invalid area of ​​a preset size corresponding to the above circular area is marked.

[0037] For ease of understanding, Figure 4 A schematic diagram of the structure of a circular fingerprint sensor provided by an embodiment of the present invention.

[0038] Depend on Figure 4 As can be seen, the circular fingerprint sensor 12 is filled with the square invalid area 13. Here, the center of the invalid area 13 coincides with the center of the circular area, and the side length is equal to the diameter of the circular area.

[0039] Step S3: determining a target capacitance value of the circular area in the capacitance value according to the invalid area and the capacitance value.

[0040] In this embodiment, the target capacitance value of the circular area can be obtained by trimming the capacitance value corresponding to the invalid area from the capacitance value.

[0041] Step S4: determining the fingerprint collection information of the user according to the target capacitance value.

[0042] The embodiment of the present invention provides a control method for a circular fingerprint sensor, which is applied to a controller; the controller is connected to a capacitive fingerprint sensor with a preset circular area; the method includes: step S1: obtaining the position information of the circular area, and collecting the capacitance value of the user's fingerprint through the capacitive fingerprint sensor; step S2: marking an invalid area of ​​a preset size corresponding to the circular area according to the position information; step S3: determining the target capacitance value of the circular area in the capacitance value according to the invalid area and the capacitance value; step S4: determining the fingerprint collection information of the user according to the target capacitance value. The method designs the capacitive fingerprint sensor into a circle, marks the invalid area during the control process, and cuts the invalid area before identification during the fingerprint recognition process, thereby improving the fingerprint collection accuracy.

[0043] Example 2

[0044] Based on the above embodiments, Figure 5 A schematic flow chart of another method for controlling a circular fingerprint sensor provided by an embodiment of the present invention.

[0045] Depend on Figure 5 As can be seen, the method includes:

[0046] Step S1: Acquire the position information of the circular area, and collect the capacitance value of the user's fingerprint through the capacitive fingerprint collection sensor.

[0047] Step S2: According to the above position information, an invalid area of ​​a preset size corresponding to the above circular area is marked.

[0048] Step S31: determining invalid capacitance values ​​among the capacitance values ​​according to the invalid area.

[0049] Step S32: deleting the invalid capacitance value from the capacitance value to obtain the target capacitance value of the circular area in the capacitance value.

[0050] Step S4: determining the fingerprint collection information of the user according to the target capacitance value.

[0051] In one embodiment, the step of determining the fingerprint collection information of the above-mentioned user according to the above-mentioned target capacitance value includes: step S41: decoding the above-mentioned target capacitance value to obtain a fingerprint image; step S42: based on preset fingerprint features, judging whether there is a fingerprint in the above-mentioned fingerprint image; if yes, determining the fingerprint collection information of the above-mentioned user according to the above-mentioned fingerprint image; if not, repeating the above-mentioned steps S2 to S42 until there is a fingerprint in the above-mentioned fingerprint image, and determining the fingerprint collection information of the above-mentioned user according to the above-mentioned fingerprint image.

[0052] Furthermore, the step of determining the fingerprint collection information of the user according to the fingerprint image includes: performing image enhancement on the fingerprint image to obtain an enhanced image; and determining the fingerprint collection information of the user according to the enhanced image.

[0053] In actual operation, before the step of obtaining the position information of the circular area and collecting the capacitance value of the user's fingerprint through the capacitive fingerprint acquisition sensor, the method includes: when the controller and the capacitive fingerprint acquisition sensor are powered on, initializing the controller and the capacitive fingerprint acquisition sensor.

[0054] Furthermore, when the controller and the capacitive fingerprint acquisition sensor are powered on, after the step of initializing the controller and the capacitive fingerprint acquisition sensor, the method includes: obtaining an initial capacitance value of the capacitive fingerprint acquisition sensor; the step of acquiring the capacitance value of the user's fingerprint through the capacitive fingerprint acquisition sensor includes: acquiring the current capacitance value of the user's fingerprint through the capacitive fingerprint acquisition sensor; and determining the capacitance value of the user's fingerprint acquired by the capacitive fingerprint acquisition sensor based on the current capacitance value and the initial capacitance value.

[0055] Further, the step of determining the capacitance value of the capacitive fingerprint acquisition sensor for collecting the user's fingerprint according to the current capacitance value and the initial capacitance value includes: determining the difference between the current capacitance value and the initial capacitance value as the capacitance value of the capacitive fingerprint acquisition sensor for collecting the user's fingerprint.

[0056] The embodiment of the present invention provides a control method for a circular fingerprint sensor, which is applied to a controller; the controller is connected to a capacitive fingerprint sensor with a preset circular area; the method comprises: step S1: obtaining the position information of the circular area, and collecting the capacitance value of the user's fingerprint through the capacitive fingerprint sensor; step S2: marking an invalid area of ​​a preset size corresponding to the circular area according to the position information; step S31: determining the invalid capacitance value in the capacitance value according to the invalid area. Step S32: deleting the invalid capacitance value from the capacitance value to obtain the target capacitance value of the circular area in the capacitance value; step S4: determining the fingerprint collection information of the user according to the target capacitance value. The method designs the capacitive fingerprint sensor into a circle, marks the invalid area during the control process, and deletes the invalid capacitance value corresponding to the invalid area from the capacitance value during the fingerprint recognition process, thereby further improving the fingerprint collection accuracy.

[0057] Example 3

[0058] Based on the above embodiments, Figure 6A schematic structural diagram of a control device for a circular fingerprint sensor provided by an embodiment of the present invention.

[0059] Depend on Figure 6 As can be seen, the device includes:

[0060] The acquisition module 31 is used to acquire the position information of the circular area and collect the capacitance value of the user's fingerprint through the capacitive fingerprint collection sensor.

[0061] The invalid area determination module 32 is used to mark an invalid area of ​​a preset size corresponding to the circular area according to the position information.

[0062] The target capacitance value determining module 33 is used to determine the target capacitance value of the circular area in the capacitance value according to the invalid area and the capacitance value.

[0063] The fingerprint collection module 34 is used to determine the fingerprint collection information of the user according to the target capacitance value.

[0064] The acquisition module 31 , the invalid area determination module 32 , the target capacitance value determination module 33 and the fingerprint collection module 34 are connected in sequence.

[0065] In one embodiment, the target capacitance value determination module 33 is further used to determine the invalid capacitance value in the above capacitance value according to the above invalid area; delete the above invalid capacitance value from the above capacitance value to obtain the target capacitance value of the above circular area in the above capacitance value.

[0066] In one embodiment, the fingerprint acquisition module 34 is also used to decode the target capacitance value to obtain a fingerprint image; based on preset fingerprint features, determine whether there is a fingerprint in the fingerprint image; if yes, determine the fingerprint acquisition information of the user according to the fingerprint image; if not, repeat steps S2 to S42 until there is a fingerprint in the fingerprint image, and determine the fingerprint acquisition information of the user according to the fingerprint image.

[0067] In one embodiment, the fingerprint collection module 34 is further used to perform image enhancement on the fingerprint image to obtain an enhanced image; and determine the fingerprint collection information of the user according to the enhanced image.

[0068] In one embodiment, the device further includes an initialization module connected to the acquisition module 31; the initialization module is used to initialize the controller and the capacitive fingerprint acquisition sensor when the controller and the capacitive fingerprint acquisition sensor are powered on.

[0069] In one embodiment, the initialization module is also used to obtain the initial capacitance value of the capacitive fingerprint acquisition sensor; collect the current capacitance value of the user's fingerprint through the capacitive fingerprint acquisition sensor; and determine the capacitance value of the user's fingerprint collected by the capacitive fingerprint acquisition sensor based on the current capacitance value and the initial capacitance value.

[0070] In one implementation manner, the initialization module is further configured to determine the difference between the current capacitance value and the initial capacitance value as the capacitance value of the capacitive fingerprint acquisition sensor for acquiring the user's fingerprint.

[0071] The control device of the circular fingerprint sensor provided in the embodiment of the present invention has the same implementation principle and technical effects as those of the aforementioned control method of the circular fingerprint sensor. For the sake of brief description, for matters not mentioned in the embodiment of the control device of the circular fingerprint sensor, reference may be made to the corresponding contents in the aforementioned method embodiment.

[0072] The embodiment of the present invention further provides an electronic device, such as Figure 7 As shown, it is a schematic diagram of the structure of the electronic device, wherein the electronic device includes a processor 41 and a memory 42, the memory 42 stores machine executable instructions that can be executed by the processor 41, and the processor 41 executes the machine executable instructions to implement the above-mentioned control method of the circular fingerprint collection sensor.

[0073] exist Figure 7 In the illustrated embodiment, the electronic device further includes a bus 43 and a communication interface 44 , wherein the processor 41 , the communication interface 44 and the memory 42 are connected via the bus.

[0074] The memory 42 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 44 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used. The bus may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 7 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0075] Among them, the processor 41 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit in the processor 41 or the instruction in the form of software. The above processor 41 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present invention can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module can be located in a random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register or other mature storage media in the art. The storage medium is located in the memory, and the processor 41 reads the information in the memory 42 and completes the steps of the control method of the circular fingerprint sensor of the above embodiment in combination with its hardware.

[0076] An embodiment of the present invention further provides a machine-readable storage medium, which stores machine-executable instructions. When the machine-executable instructions are called and executed by a processor, the machine-executable instructions prompt the processor to implement the control method of the circular fingerprint sensor. The specific implementation can refer to the aforementioned method embodiment, which will not be repeated here.

[0077] The control method of the circular fingerprint sensor, the control device of the circular fingerprint sensor, and the computer program product of the electronic device provided in the embodiments of the present invention include a computer-readable storage medium storing program codes. The instructions included in the program codes can be used to execute the control method of the circular fingerprint sensor described in the previous method embodiments. The specific implementation can be referred to the method embodiments, which will not be repeated here.

[0078] Unless otherwise specifically stated, the relative steps, numerical expressions and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0079] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0080] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present invention, which are used to illustrate the technical solutions of the present invention rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the aforementioned embodiments, those of ordinary skill in the art should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the aforementioned embodiments within the technical scope disclosed by the present invention, or can easily conceive of changes, or make equivalent replacements for some of the technical features therein. Such modifications, changes or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the protection scope of the present invention.

Claims

1. A control method for a circular fingerprint sensor, characterized in that: Applied to controllers; The controller is connected to a capacitive fingerprint collection sensor in a preset circular area; the method comprises: Step S1: acquiring the position information of the circular area, and collecting the capacitance value of the user's fingerprint through the capacitive fingerprint collection sensor; Step S2: According to the position information, marking an invalid area of ​​a preset size corresponding to the circular area; Step S3: determining a target capacitance value of the circular area in the capacitance value according to the invalid area and the capacitance value; Step S4: determining the fingerprint collection information of the user according to the target capacitance value.

2. The control method of the circular fingerprint sensor according to claim 1, characterized in that: The step of determining a target capacitance value of the circular area in the capacitance value according to the invalid area and the capacitance value comprises: Step S31: determining invalid capacitance values ​​among the capacitance values ​​according to the invalid area; Step S32: deleting the invalid capacitance value from the capacitance value to obtain a target capacitance value of the circular area in the capacitance value.

3. The control method of the circular fingerprint sensor according to claim 1, characterized in that: The step of determining the fingerprint collection information of the user according to the target capacitance value includes: Step S41: decoding the target capacitance value to obtain a fingerprint image; Step S42: Based on the preset fingerprint features, determining whether there is a fingerprint in the fingerprint image; If yes, determining the fingerprint collection information of the user according to the fingerprint image; If not, repeat step S2 to step S42 until a fingerprint exists in the fingerprint image, and determine the fingerprint collection information of the user according to the fingerprint image.

4. The control method of the circular fingerprint sensor according to claim 3, characterized in that: The step of determining the fingerprint collection information of the user according to the fingerprint image comprises: Performing image enhancement on the fingerprint image to obtain an enhanced image; The fingerprint collection information of the user is determined according to the enhanced image.

5. The control method of the circular fingerprint sensor according to claim 1, characterized in that: Before the step of acquiring the position information of the circular area and collecting the capacitance value of the user's fingerprint by the capacitive fingerprint collection sensor, the method includes: When the controller and the capacitive fingerprint acquisition sensor are powered on, the controller and the capacitive fingerprint acquisition sensor are initialized.

6. The control method of the circular fingerprint sensor according to claim 5, characterized in that: When the controller and the capacitive fingerprint acquisition sensor are powered on, after the step of initializing the controller and the capacitive fingerprint acquisition sensor, the method includes: Obtaining an initial capacitance value of the capacitive fingerprint acquisition sensor; The step of collecting the capacitance value of the user's fingerprint by the capacitive fingerprint collection sensor includes: Collecting the current capacitance value of the user's fingerprint through the capacitive fingerprint collection sensor; The capacitance value of the capacitive fingerprint acquisition sensor for acquiring the user's fingerprint is determined according to the current capacitance value and the initial capacitance value.

7. The control method of the circular fingerprint sensor according to claim 6, characterized in that: The step of determining the capacitance value of the capacitive fingerprint acquisition sensor for acquiring the user's fingerprint according to the current capacitance value and the initial capacitance value comprises: The difference between the current capacitance value and the initial capacitance value is determined as the capacitance value of the capacitive fingerprint acquisition sensor for acquiring the user's fingerprint.

8. The control method of the circular fingerprint sensor according to claim 1, characterized in that: The capacitive fingerprint collection sensor is arranged on a glass substrate.

9. A control device for a circular fingerprint sensor, characterized in that: Applied to controllers; The controller is connected to a capacitive fingerprint collection sensor in a preset circular area; the device comprises: An acquisition module, used to acquire the position information of the circular area and collect the capacitance value of the user's fingerprint through the capacitive fingerprint acquisition sensor; An invalid area determination module, used for marking an invalid area of ​​a preset size corresponding to the circular area according to the position information; a target capacitance value determining module, configured to determine a target capacitance value of the circular area in the capacitance value according to the invalid area and the capacitance value; The fingerprint collection module is used to determine the fingerprint collection information of the user according to the target capacitance value.

10. An electronic device, characterized in that: The electronic device includes a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the control method of the circular fingerprint sensor according to any one of claims 1 to 8.

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