CN108319885B - Fingerprint identification method and device - Google Patents

Fingerprint identification method and device Download PDF

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CN108319885B
CN108319885B CN201710032066.2A CN201710032066A CN108319885B CN 108319885 B CN108319885 B CN 108319885B CN 201710032066 A CN201710032066 A CN 201710032066A CN 108319885 B CN108319885 B CN 108319885B
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determining
display screen
preset
electrode
touch operation
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CN108319885A (en
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杨坤
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Beijing Xiaomi Mobile Software Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures

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  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • User Interface Of Digital Computer (AREA)
  • Image Input (AREA)

Abstract

The disclosure relates to a fingerprint identification method and a fingerprint identification device, and belongs to the technical field of terminals. The method comprises the following steps: when a touch operation for fingerprint identification is detected on a display screen, determining the acting pressure and the touch position of the touch operation on the display screen; and when the action pressure is greater than or equal to a preset pressure threshold value and the touch position is located in a preset identification area, determining a fingerprint image corresponding to the touch operation and carrying out fingerprint identification. According to the embodiment of the disclosure, when it is determined that the action pressure of the touch operation on the display screen is greater than or equal to the preset pressure threshold and the touch position is located in the preset identification area, the fingerprint image corresponding to the touch operation can be determined and fingerprint identification is performed, that is, when the parameters of the touch operation meet certain conditions, fingerprint identification is performed again, so that the accuracy of fingerprint identification can be improved, and the fingerprint image corresponding to the touch operation does not need to be determined for many times, thereby reducing the power consumption of the terminal.

Description

Fingerprint identification method and device
Technical Field
The present disclosure relates to the field of terminal technologies, and in particular, to a fingerprint identification method and apparatus.
Background
With the rapid development of terminal technology, the terminal can provide information protection for the user through a fingerprint identification function so as to ensure the information security of the user. The user can input own fingerprint in the terminal in advance, then when the terminal identifies the same fingerprint, the next operation can be executed, and when the fingerprint identified by the terminal is different from the fingerprint of the user, the possibility that the information of the user is stolen can be considered, so that the terminal can not continuously execute the next operation, and the information safety of the user is ensured.
Usually, a manufacturer of the terminal configures a groove below a terminal display screen or a rear camera, when a user needs to use the fingerprint identification function of the terminal, the user can press a finger at the groove, so that when the terminal detects a touch operation acting on the groove, the finger pressed at the groove can be imaged, an obtained fingerprint image is compared with a stored fingerprint image, and then a corresponding operation is executed according to a comparison result.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides a fingerprint identification method and apparatus.
According to a first aspect of the embodiments of the present disclosure, there is provided a fingerprint identification method, the method including:
when a touch operation for fingerprint identification is detected on a display screen, determining the acting pressure and the touch position of the touch operation on the display screen;
and when the action pressure is greater than or equal to a preset pressure threshold value and the touch position is located in a preset identification area, determining a fingerprint image corresponding to the touch operation and carrying out fingerprint identification.
Optionally, when the acting pressure is greater than or equal to a preset pressure threshold and the touch position is located in a preset identification area, before determining a fingerprint image corresponding to the touch operation and performing fingerprint identification, the method further includes:
determining the acting time of the touch operation on the display screen;
correspondingly, when the acting pressure is greater than or equal to a preset pressure threshold and the touch position is located in a preset identification area, determining a fingerprint image corresponding to the touch operation and performing fingerprint identification, including:
and when the action pressure is greater than or equal to a preset pressure threshold value, the touch position is located in a preset identification area, and the action duration is greater than the preset duration, determining a fingerprint image corresponding to the touch operation and performing fingerprint identification.
Optionally, the determining the acting pressure of the touch operation on the display screen includes:
determining the acting pressure of the touch operation on the display screen through a pressure sensor of the display screen; or,
determining an acting pressure of the touch operation on the display screen based on the capacitance of the common electrode of the display screen.
Optionally, the determining a touch position of the touch operation on the display screen includes:
for each of a plurality of crossed electrodes on the display screen, detecting the capacitance of the crossed electrode when the touch operation acts on the display screen;
determining a difference value between the capacitance of the crossed electrode and the reference capacitance of the crossed electrode when the touch operation acts on the display screen to obtain a capacitance difference value of the crossed electrode;
when the capacitance difference value of at least one crossed electrode in the plurality of crossed electrodes exceeds a preset capacitance, determining the position of the at least one crossed electrode on the display screen;
and determining the position of an area surrounded by the position of the at least one crossed electrode on the display screen as the touch position of the touch operation.
Optionally, the determining a touch position of the touch operation on the display screen includes:
determining a current generated by a first electrode, a current generated by a second electrode, a current generated by a third electrode and a current generated by a fourth electrode when the touch operation acts on the display screen, wherein the first electrode, the second electrode, the third electrode and the fourth electrode are electrodes respectively arranged at a first preset position, a second preset position, a third preset position and a fourth preset position of a terminal where the display screen is located;
and determining the touch position of the touch operation on the display screen based on the current generated by any three adjacent electrodes of the first electrode, the second electrode, the third electrode and the fourth electrode.
Optionally, when the acting pressure is greater than or equal to a preset pressure threshold and the touch position is located in a preset identification area, before determining a fingerprint image corresponding to the touch operation and performing fingerprint identification, the method further includes:
when the central point of the touch position is located in the preset identification area, determining that the touch position is located in the preset identification area; or,
and when the distance between the central point of the touch position and the central point of the preset identification area is smaller than a preset distance, determining that the touch position is located in the preset identification area.
Optionally, the method further comprises:
when fingerprint identification is carried out and an identification result is determined, determining a prompting mode, and prompting the identification result through the prompting mode;
or
And determining a prompt mode while determining the fingerprint image corresponding to the touch operation and performing fingerprint identification, and prompting the identification result through the prompt mode when performing fingerprint identification and determining the identification result.
According to a second aspect of the embodiments of the present disclosure, there is provided a fingerprint identification device, the device including:
the fingerprint identification device comprises a first determination module, a second determination module and a third determination module, wherein the first determination module is used for determining the acting pressure and the touch position of the touch operation on a display screen when the touch operation for fingerprint identification is detected on the display screen;
and the second determining module is used for determining the fingerprint image corresponding to the touch operation and performing fingerprint identification when the action pressure is greater than or equal to a preset pressure threshold value and the touch position is located in a preset identification area.
Optionally, the apparatus further comprises:
the third determining module is used for determining the acting time of the touch operation on the display screen;
accordingly, the second determining module comprises:
and the first determining submodule is used for determining a fingerprint image corresponding to the touch operation and performing fingerprint identification when the action pressure is greater than or equal to a preset pressure threshold value, the touch position is located in a preset identification area, and the action duration is greater than the preset duration.
Optionally, the first determining module includes:
the second determining submodule is used for determining acting pressure of the touch operation on the display screen through a pressure sensor of the display screen; or,
and the third determining submodule is used for determining the acting pressure of the touch operation on the display screen based on the capacitance of the common electrode of the display screen.
Optionally, the first determining module includes:
the detection submodule is used for detecting the capacitance of each crossed electrode when the touch operation acts on the display screen for each crossed electrode in a plurality of crossed electrodes on the display screen;
the fourth determining submodule is used for determining the difference between the capacitance of the crossed electrode and the reference capacitance of the crossed electrode when the touch operation acts on the display screen to obtain the capacitance difference of the crossed electrode;
a fifth determining submodule, configured to determine a position of at least one crossed electrode on the display screen when a capacitance difference value of at least one crossed electrode among the plurality of crossed electrodes exceeds a preset capacitance;
and the sixth determining submodule is used for determining the position of an area surrounded by the position of the at least one crossed electrode on the display screen as the touch position of the touch operation.
Optionally, the first determining module includes:
a seventh determining submodule, configured to determine a current generated by the first electrode, a current generated by the second electrode, a current generated by the third electrode, and a current generated by the fourth electrode when the touch operation acts on the display screen, where the first electrode, the second electrode, the third electrode, and the fourth electrode are electrodes respectively arranged at a first preset position, a second preset position, a third preset position, and a fourth preset position of a terminal where the display screen is located;
and the eighth determining submodule is used for determining the touch position of the touch operation on the display screen based on the current generated by any three adjacent electrodes of the first electrode, the second electrode, the third electrode and the fourth electrode.
Optionally, the apparatus further comprises:
the fourth determining module is used for determining that the touch position is located in the preset identification area when the central point of the touch position is located in the preset identification area; or,
and the fifth determining module is used for determining that the touch position is located in the preset identification area when the distance between the central point of the touch position and the central point of the preset identification area is smaller than the preset distance.
Optionally, the apparatus further comprises:
the first prompting module is used for determining a prompting mode when fingerprint identification is carried out and an identification result is determined, and prompting the identification result through the prompting mode;
or
And the second prompting module is used for determining a fingerprint image corresponding to the touch operation, identifying a prompting mode while identifying the fingerprint, and prompting the identification result through the prompting mode when identifying the fingerprint and determining the identification result.
According to a third aspect of the embodiments of the present disclosure, there is provided a fingerprint identification device, the device including:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
when a touch operation for fingerprint identification is detected on a display screen, determining the acting pressure and the touch position of the touch operation on the display screen;
and when the action pressure is greater than or equal to a preset pressure threshold value and the touch position is located in a preset identification area, determining a fingerprint image corresponding to the touch operation and carrying out fingerprint identification.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: in the embodiment of the disclosure, when a touch operation for performing fingerprint identification is detected on a display screen, an action pressure and a touch position of the touch operation on the display screen may be determined, and then when the action pressure is greater than or equal to a preset pressure threshold and the touch position is located in a preset identification area, a fingerprint image corresponding to the touch operation may be determined and fingerprint identification may be performed, that is, when a touch operation parameter of a user satisfies a certain condition, fingerprint identification may be performed again, so that an accuracy of fingerprint identification may be improved, and a fingerprint image corresponding to the touch operation does not need to be determined many times, thereby reducing power consumption of the terminal.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a flow chart illustrating a method of fingerprinting in accordance with an exemplary embodiment.
FIG. 2A is a flow chart illustrating another method of fingerprinting in accordance with an exemplary embodiment.
FIG. 2B is a schematic diagram illustrating a distribution of a plurality of interdigitated electrodes on a display screen in accordance with one exemplary embodiment.
FIG. 2C is a schematic diagram illustrating determining touch location coordinates according to an exemplary embodiment.
FIG. 3A is a block diagram illustrating a fingerprint recognition device according to one exemplary embodiment.
FIG. 3B is a block diagram illustrating another fingerprint recognition device according to an example embodiment.
FIG. 3C is a block diagram illustrating a first determination module in accordance with an exemplary embodiment.
FIG. 3D is a block diagram illustrating another first determination module according to an example embodiment.
FIG. 3E is a block diagram illustrating a third first determination module in accordance with an exemplary embodiment.
FIG. 3F is a block diagram illustrating a third type of fingerprint recognition device, according to an example embodiment.
FIG. 3G is a block diagram illustrating a fourth type of fingerprint recognition device, according to an example embodiment.
FIG. 4 is a block diagram illustrating a fingerprint recognition device according to an example embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Before explaining the embodiments of the present disclosure in detail, an application scenario of the embodiments of the present disclosure will be described. When the user need carry out fingerprint identification through the terminal, can press the finger at the recess department that the terminal is used for discerning the fingerprint usually, later the terminal can gather the finger and press the fingerprint image that the touch operation that produces corresponds, and then compare with the fingerprint image of storage, in order to carry out fingerprint identification, and carry out fingerprint identification's in-process at the terminal, user's finger effect is too little at the dynamics of display screen, and the touch position of user finger does not lie in factors such as the region that the terminal is used for fingerprint identification and all can lead to the terminal unable effectively to gather the fingerprint image, thereby fingerprint identification's rate of accuracy has been reduced, simultaneously, the terminal need gather the fingerprint image many times, and need carry out fingerprint image contrast many times, thereby the consumption at terminal has been increased. Therefore, the embodiment of the present disclosure provides a fingerprint identification method, which can improve the accuracy of fingerprint identification and reduce the power consumption of a terminal when a user performs fingerprint identification through the terminal.
FIG. 1 is a flow chart illustrating a method of fingerprinting in accordance with an exemplary embodiment. As shown in fig. 1, the fingerprint identification method is used in a terminal and includes the following steps.
In step 101, when a touch operation for fingerprint recognition is detected on a display screen, an acting pressure and a touch position of the touch operation on the display screen are determined.
In step 102, when the application pressure is greater than or equal to the preset pressure threshold and the touch position is located in the preset identification area, determining a fingerprint image corresponding to the touch operation and performing fingerprint identification.
In the embodiment of the disclosure, when a touch operation for performing fingerprint identification is detected on a display screen, an action pressure and a touch position of the touch operation on the display screen may be determined, and then when the action pressure is greater than or equal to a preset pressure threshold and the touch position is located in a preset identification area, a fingerprint image corresponding to the touch operation may be determined and fingerprint identification may be performed, that is, when a touch operation parameter of a user satisfies a certain condition, fingerprint identification may be performed again, so that an accuracy of fingerprint identification may be improved, and a fingerprint image corresponding to the touch operation does not need to be determined many times, thereby reducing power consumption of the terminal.
Optionally, when the application pressure is greater than or equal to the preset pressure threshold and the touch position is located in the preset identification area, before determining the fingerprint image corresponding to the touch operation and performing fingerprint identification, the method further includes:
determining the acting time of the touch operation on the display screen;
correspondingly, when the acting pressure is greater than or equal to the preset pressure threshold and the touch position is located in the preset identification area, determining the fingerprint image corresponding to the touch operation and performing fingerprint identification, including:
and when the acting pressure is greater than or equal to a preset pressure threshold value, the touch position is located in a preset identification area, and the acting time is greater than the preset time, determining a fingerprint image corresponding to the touch operation and performing fingerprint identification.
Optionally, determining the acting pressure of the touch operation on the display screen includes:
determining the acting pressure of the touch operation on the display screen through a pressure sensor of the display screen; or,
determining the acting pressure of the touch operation on the display screen based on the capacitance of the common electrode of the display screen.
Optionally, determining a touch position of the touch operation on the display screen includes:
for each of a plurality of intersecting electrodes on a display screen, detecting a capacitance of the intersecting electrode when a touch operation is applied on the display screen;
determining a difference value between the capacitance of the crossed electrode and the reference capacitance of the crossed electrode when touch operation acts on the display screen to obtain a capacitance difference value of the crossed electrode;
when the capacitance difference value of at least one crossed electrode in the plurality of crossed electrodes exceeds a preset capacitance, determining the position of the at least one crossed electrode on the display screen;
and determining the position of an area surrounded by the position of the at least one crossed electrode on the display screen as the touch position of the touch operation.
Optionally, determining a touch position of the touch operation on the display screen includes:
determining a current generated by a first electrode, a current generated by a second electrode, a current generated by a third electrode and a current generated by a fourth electrode when a touch operation acts on the display screen, wherein the first electrode, the second electrode, the third electrode and the fourth electrode are electrodes respectively arranged at a first preset position, a second preset position, a third preset position and a fourth preset position of a terminal where the display screen is located;
and determining the touch position of the touch operation on the display screen based on the currents generated by the adjacent electrodes at any three positions of the first electrode, the second electrode, the third electrode and the fourth electrode.
Optionally, when the application pressure is greater than or equal to the preset pressure threshold and the touch position is located in the preset identification area, before determining the fingerprint image corresponding to the touch operation and performing fingerprint identification, the method further includes:
when the central point of the touch position is located in the preset identification area, determining that the touch position is located in the preset identification area; or,
and when the distance between the central point of the touch position and the central point of the preset identification area is smaller than the preset distance, determining that the touch position is located in the preset identification area.
Optionally, the method further comprises:
when fingerprint identification is carried out and an identification result is determined, determining a prompting mode, and prompting the identification result through the prompting mode;
or
And determining a fingerprint image corresponding to the touch operation, identifying the fingerprint, determining a prompting mode, and prompting the identification result through the prompting mode when the fingerprint identification is performed and the identification result is determined.
All the above optional technical solutions can be combined arbitrarily to form optional embodiments of the present disclosure, and the embodiments of the present disclosure are not described in detail again.
FIG. 2A is a flow chart illustrating a method of fingerprinting in accordance with an exemplary embodiment. As shown in fig. 2A, the fingerprint identification method is used in a terminal and includes the following steps.
In step 201, when a touch operation for fingerprint recognition is detected on a display screen, the pressure applied by the touch operation on the display screen is determined.
When the terminal detects a touch operation for fingerprint identification on the display screen, the method can determine the acting pressure of the touch operation on the display screen by the following two ways, including:
the first mode is as follows: the acting pressure of the touch operation on the display screen is determined through the pressure sensor of the display screen.
Because the terminal generally adopts a capacitive screen, and the capacitive screen may include a plurality of structures such as a GFF (Cover Glass Film, double-layer Film lamination), an ocell (touch screen embedding), an incorporated (touch Liquid Crystal integrated), and an oled (Active matrix/organic light emitting diode, Active matrix organic light emitting diode panel), the manufacturer of the terminal may place the pressure sensor in the Display structure or the touch structure of the capacitive screen, for example, may set the pressure sensor on the back of an LCD (Liquid Crystal Display ), the back of an oled, or the backlight structure of an LCD. Further, the pressure sensor may be an FPC (Flexible Printed Circuit) pressure sensor or the like.
The second mode is as follows: determining the acting pressure of the touch operation on the display screen based on the capacitance of the common electrode of the display screen.
The display screen of the terminal is usually provided with a common electrode, when a user touches the display screen with different force, the distance between two polar plates of the common electrode can be changed, so that the capacitance of the common electrode is changed, and therefore, the terminal can determine the acting pressure of touch operation on the display screen according to the capacitance of the common electrode of the display screen.
Wherein, the terminal may first determine the capacitance of the common electrode of the display screen and determine the acting pressure of the touch operation on the display screen based on the following formula (2-1).
Figure BDA0001212047020000091
In the formula, F is the acting pressure of the touch operation on the display screen, a is the stiffness coefficient of the display screen, d is the distance between the two capacitive plates of the display screen when no pressure is applied, epsilon is the dielectric constant of the dielectric medium between the two capacitive plates of the display screen, S is the facing area between the two capacitive plates of the display screen, pi is the circumferential ratio, k is the electrostatic force constant, and C is the capacitance between the two capacitive plates of the display screen.
In the above formula, A, d, ε, S, π, k are all constants, so the terminal can determine the force F applied by the touch operation on the display screen through the above formula based on the capacitance C between the two capacitive plates of the common electrode of the display screen.
It should be noted that the formula for determining the pressure applied to the display screen by the touch operation based on the capacitance of the common electrode of the display screen by the terminal is not limited to the above formula, and in practical application, the formula may be obtained by adding a plurality of correction terms such as voltage and capacitance to the above formula. In addition, the second implementation manner may be implemented by a Vcom (common electrode Voltage) layer of the display screen.
Further, the terminal may also determine the acting pressure of the touch operation on the display screen by the following means, including: detecting the action pressure of the touch operation on the display screen for multiple times within a specified time period to obtain multiple action pressures, wherein the specified time period is a time period which is after the current time and is a preset time length away from the current time; and determining the latest action pressure in the plurality of action pressures as the action pressure of the touch operation on the display screen. Because a process exists in the generation of the touch operation, the terminal determines the acting pressure of the touch operation on the display screen in the periodic detection mode, and the accuracy of determining the acting pressure can be improved.
In step 202, a touch position of a touch operation on the display screen is determined.
The terminal can realize the step through the following two implementation modes, including:
the first mode is as follows: for each crossed electrode in a plurality of crossed electrodes on a display screen, detecting the capacitance of the crossed electrode when a touch operation acts on the display screen; determining a difference value between the capacitance of the crossed electrode and the reference capacitance of the crossed electrode when touch operation acts on the display screen to obtain a capacitance difference value of the crossed electrode; when the capacitance difference value of at least one crossed electrode in the plurality of crossed electrodes exceeds a preset capacitance, determining the position of the at least one crossed electrode on the display screen; and determining the position of an area surrounded by the position of the at least one crossed electrode on the display screen as the touch position of the touch operation.
As shown in fig. 2B, a plurality of cross electrodes may be disposed on the display screen of the terminal, when the terminal detects a touch operation on the display screen, capacitances of cross electrodes located at a touch position among the plurality of cross electrodes may change, so that the capacitance of the cross electrode with the changed capacitance may be greater than a reference capacitance of the cross electrode, and when a capacitance difference between the two exceeds a preset capacitance, the terminal may determine a position of the cross electrode with the capacitance difference exceeding the preset capacitance, and determine a position of an area surrounded by the position of the at least one cross electrode on the display screen as the touch position of the touch operation, where the reference capacitance of the cross electrode is a capacitance when the cross electrode is not touched.
The second mode is as follows: comprises the following steps (1) and (2).
Step (1): determining the current generated by the first electrode, the current generated by the second electrode, the current generated by the third electrode and the current generated by the fourth electrode when touch operation acts on the display screen, wherein the first electrode, the second electrode, the third electrode and the fourth electrode are electrodes respectively arranged at a first preset position, a second preset position, a third preset position and a fourth preset position of the terminal where the display screen is located.
In practical applications, a first electrode, a second electrode, a third electrode and a fourth electrode may be disposed at an upper left corner, an upper right corner, a lower right corner and a lower left corner of the terminal, respectively, and charges are supplemented by the four electrodes.
Step (2): and determining the touch position of the touch operation on the display screen based on the current generated by any three adjacent electrodes in the first electrode, the second electrode, the third electrode and the fourth electrode.
The terminal can determine a touch abscissa through the following formula (2-2) and a touch ordinate through the following formula (2-3) based on currents generated by any adjacent three electrodes of the first electrode, the second electrode, the third electrode and the fourth electrode, and determine a position indicated by the touch abscissa and the touch ordinate as a touch position of the touch operation on the display screen.
Figure BDA0001212047020000101
Figure BDA0001212047020000102
Wherein, in the above formula, LbxTo touch the abscissa, ibFor the current, L, generated by the electrode located at the middle of any adjacent three electrodesxTo the top or bottom side of the display screen, iaFor the current, L, generated for any adjacent three electrodes with the same abscissa as the electrode located at the middle positionbyAs the ordinate of touch, LyTo the left or right side of the display screen, icThe current generated for the electrode with the same ordinate as the electrode located at the middle position in any adjacent three electrodes. Wherein, for the terminal equipped with the fingerprint identification module, the length of the top edge or the length of the bottom edge of the display screen of the terminal and the length of the left edge or the right edge of the display screen are determined when the terminal leaves the factoryWhen the terminal executes the method, the length of the top edge or the length of the bottom edge of the display screen is LxAnd the left or right length L of the display screenyAre all known quantities.
As shown in fig. 2C, any adjacent three electrodes may be a first electrode located at the upper left corner of the display screen, a second electrode located at the upper right corner of the display screen, and a third electrode located at the lower right corner of the display screen, respectively, where the second electrode is an electrode located at the middle position among the three electrodes, and the current generated by the second electrode is ibThe first electrode is the same as the second electrode in abscissa, and the current generated by the first electrode is iaThe third electrode is the same as the second electrode in vertical coordinate, and the current generated by the third electrode is icWherein the distance between the first electrode and the second electrode is the top side length or the bottom side length L of the display screenxThe distance between the second electrode and the third electrode is L of the left side length or the right side length of the display screeny。
It should be noted that, when a touch operation for fingerprint recognition is detected on the display screen, the terminal may determine an acting pressure of the touch operation on the display screen first and then determine a touch position of the touch operation on the display screen, and of course, the terminal may also determine a touch position of the touch operation on the display screen first and then determine an acting pressure of the touch operation on the display screen.
To this end, the terminal may determine the acting pressure and the touch position of the touch operation for performing fingerprint identification on the display screen through the above steps 201 to 202, and then the terminal may determine a fingerprint image corresponding to the touch operation through step 203 and perform fingerprint identification.
In step 203, when the application pressure is greater than or equal to the preset pressure threshold and the touch position is located in the preset identification area, determining a fingerprint image corresponding to the touch operation and performing fingerprint identification.
The terminal firstly judges whether the action pressure is greater than or equal to a preset pressure threshold value or not and whether the touch position is located in a preset identification area or not, when the action pressure is smaller than the preset pressure threshold value or the touch position is not located in the preset identification area, the terminal can finish the operation, when the action pressure is greater than or equal to the preset pressure threshold value and the touch position is located in the preset identification area, a fingerprint image corresponding to the touch operation is collected through a fingerprint collector, the collected fingerprint image is compared with a stored fingerprint image to carry out fingerprint identification, when the collected fingerprint image is consistent with the stored fingerprint image, the fingerprint identification is determined to be successful, and when the collected fingerprint image is inconsistent with the stored fingerprint image, the fingerprint identification is determined to be successful.
It should be noted that the preset identification area is an area where the terminal performs fingerprint image acquisition, and the preset identification area may be an area of the whole display screen.
When the action pressure is greater than or equal to the preset pressure threshold value, the user can be considered to press the display with certain force instead of touching the display screen, the contact area between the finger and the display screen is large enough, when the touch position is located in the preset identification area, the terminal can be considered to be capable of effectively collecting the fingerprint image of the user, and then the terminal can determine the fingerprint image corresponding to the touch operation and perform fingerprint identification, so that the accuracy of fingerprint identification can be greatly improved. When the acting pressure is smaller than the preset pressure threshold value or the touch position is not located in the preset identification area, the user can be considered to be only in light touch on the screen or the fingerprint image of the user cannot be effectively collected, the terminal can finish the operation at the moment, the fingerprint image corresponding to the touch operation does not need to be determined, and then the fingerprint identification is not needed, so that the power consumption of the terminal can be reduced.
The terminal can determine whether the touch position is located in the preset identification area through the following two ways, including:
the first mode is as follows: judging whether the central point of the touch position is located in a preset identification area, determining that the touch position is located in the preset identification area when the central point of the touch position is located in the preset identification area, and determining that the touch position is not located in the preset identification area when the central point of the touch position is not located in the preset identification area.
When the central point of the touch position is located in the preset identification area, the user can be considered to press most of the fingers in the preset identification area of the display screen, and then the terminal identifies the fingerprint image corresponding to the touch operation, so that the identification accuracy can be greatly improved, the number of times of fingerprint scanning can be reduced, and the power consumption of the terminal can be reduced.
The second mode is as follows: determining the distance between the center point of the touch position and the center point of the preset identification area, determining that the touch position is located in the preset identification area when the distance between the center point of the touch position and the center point of the preset identification area is smaller than the preset distance, and determining that the touch position is not located in the preset identification area when the distance between the center point of the touch position and the center point of the preset identification area is larger than or equal to the preset distance.
When the distance between the central point of the touch position and the central point of the preset identification area is smaller than the preset distance, the user can press most of the fingers in the preset identification area of the display screen, and then the terminal identifies the fingerprint image corresponding to the touch operation, so that the identification accuracy can be greatly improved, the number of times of fingerprint scanning can be reduced, and the power consumption of the terminal can be reduced.
Further, the terminal may further perform the following steps on the basis of determining the acting pressure of the touch operation on the display screen by means of periodic detection, including: and when the acting pressure is greater than or equal to the preset pressure threshold, the touch position is located in the preset identification area, and the generation factor of the touch operation is a preset factor, determining a fingerprint image corresponding to the touch operation and performing fingerprint identification.
In practical application, the generation factors of the touch operation can be mainly divided into two factors of the user touching the display screen and the object touching the display screen, and only the factor of the user touching the display screen can enable the terminal to acquire the fingerprint, so that the terminal can determine the factor of the user touching the display screen as the preset factor in advance. In addition, because the variation trends of the action pressures of the touch operation generated by the two factors are different, the terminal can further determine which factor the touch operation belongs to according to the variation trend of the action pressure of the touch operation on the basis of determining the action pressure of the touch operation, so that when the action pressure is greater than or equal to a preset pressure threshold value, the touch position is located in a preset identification area, and the generation factor of the touch operation is the preset factor, the terminal can determine a fingerprint image corresponding to the touch operation and perform fingerprint identification.
Accordingly, when the application pressure is greater than or equal to the preset pressure threshold, the touch position is located in the preset identification area, and the generation factor of the touch operation is the preset factor, before determining the fingerprint image corresponding to the touch operation and performing fingerprint identification, the terminal may determine whether the generation factor of the touch operation is the preset factor by the following steps on the basis of determining the application pressure of the touch operation on the display screen in a periodic detection manner, including: sequencing the plurality of action pressures detected in the appointed time period according to the detection time; and when the plurality of sequenced acting pressures are sequentially increased, determining that the generation factor of the touch operation is a preset factor. And when the plurality of action pressures after the sorting are not sequentially increased, determining that the generation factor of the touch operation is not a preset factor.
When a user touches the display screen with a finger, because a touch process exists, the strength of the finger can be gradually increased in the touch process, and correspondingly, the action pressure can also be changed from small to large, the terminal can execute the steps, so that whether the generation factor of the touch operation is a preset factor or not is determined, and when the generation factor of the touch operation is determined to be the preset factor on the basis that the action pressure is greater than or equal to the preset pressure threshold value and the touch position is located in the preset identification area, the accuracy of fingerprint identification can be further improved.
In addition, since the terminal may further determine the duration of the touch operation on the display screen on the basis of determining the pressure and the touch position of the touch operation on the display screen, the terminal may further perform the following steps including: and when the acting pressure is greater than or equal to a preset pressure threshold value, the touch position is located in a preset identification area, and the acting time is greater than the preset time, determining a fingerprint image corresponding to the touch operation and performing fingerprint identification.
In the process of collecting the fingerprint image, the action time of the touch operation is longer, namely the finger of the user is kept still as much as possible, so that the collected fingerprint image can be clearer, and therefore, when the terminal determines that the action pressure is greater than or equal to the preset pressure threshold value and the touch position is located in the preset identification area and determines that the action time of the touch operation on the display screen is greater than the preset time, the accuracy of collecting and identifying the fingerprint image corresponding to the touch operation can be further improved.
Further, before the terminal performs step 203, on the basis of determining the action pressure and the touch position of the touch operation on the display screen, the action duration of the touch operation on the display screen may be further determined, and then the terminal may determine whether the action pressure, the touch position, and the action duration of the touch operation on the display screen satisfy a certain condition, so that when the action pressure, the touch position, and the action duration of the touch operation on the display screen satisfy a certain condition, the fingerprint image corresponding to the touch operation is determined again and fingerprint identification is performed. Because when the terminal judges that the acting pressure, the touch position and the acting duration of the touch operation on the display screen all meet certain conditions, the fingerprint identification can be carried out without executing the fingerprint identification operation for multiple times, the efficiency and the accuracy of the fingerprint identification can be improved simultaneously, and meanwhile, the more the factors meeting the conditions are determined by the terminal, the higher the accuracy of the fingerprint identification is.
In addition, the terminal can also determine a prompting mode when fingerprint identification is carried out and the identification result is determined, and prompt the identification result through the prompting mode; or determining a fingerprint image corresponding to the touch operation, identifying the fingerprint, determining a prompting mode, and prompting the identification result through the prompting mode when the fingerprint is identified and the identification result is determined.
After the display screen module at terminal can confirm that the parameter of touch operation satisfies certain condition, send the identification message to the fingerprint module at terminal, so that fingerprint module discerns the fingerprint, after fingerprint module at terminal carries out fingerprint identification and obtains the identification result, can send the host computer at terminal and discern the completion message, the host computer is when receiving the completion message of discernment, can confirm that the screen awakens up, vibrations, play at least one of operations such as audio and demonstration animation, and confirm at least one operation confirmed as the suggestion mode, thereby can show the user through this suggestion mode and look over the fingerprint identification result. In addition, the recognition completion message may not carry the fingerprint recognition result, that is, the host executes the same prompt operation when the recognition results are consistent or inconsistent, so that after the user views the prompt, the user can obtain the fingerprint recognition result through the displayed recognition result message and other manners.
In addition, in practical application, the display screen module of the terminal can also send prompt preparation information to the host computer while sending identification information to the fingerprint module after determining that the parameters of the touch operation meet certain conditions, so that the host computer determines the prompt mode to be executed in advance, and then the host computer can prompt a user to check the fingerprint identification result immediately through the prompt mode determined in advance when receiving the identification completion information sent by the fingerprint module, thereby shortening the response time of the whole terminal and further improving the efficiency of the terminal in executing the prompt operation.
In the embodiment of the disclosure, when a touch operation for fingerprint identification is detected on a display screen, an action pressure, a touch position and an action duration of the touch operation on the display screen may be determined, and then when the action pressure is greater than or equal to a preset pressure threshold, the touch position is located in a preset identification area, and the action duration is greater than a preset duration, a fingerprint image corresponding to the touch operation may be determined and fingerprint identification may be performed, that is, when a touch operation parameter of a user satisfies a certain condition, fingerprint identification may be performed again, accuracy of fingerprint identification may be improved, and a fingerprint image corresponding to the touch operation does not need to be determined many times, thereby reducing power consumption of the terminal.
Fig. 3A is a block diagram of a fingerprint identification device 300 according to an embodiment of the disclosure. Referring to fig. 3A, the apparatus includes a first determination module 301 and a second determination module 302.
A first determining module 301, configured to determine, when a touch operation for performing fingerprint recognition is detected on a display screen, an acting pressure and a touch position of the touch operation on the display screen;
the second determining module 302 is configured to determine a fingerprint image corresponding to the touch operation and perform fingerprint identification when the acting pressure is greater than or equal to the preset pressure threshold and the touch position is located in the preset identification area.
Optionally, referring to fig. 3B, the apparatus further comprises:
a third determining module 303, configured to determine an acting duration of the touch operation on the display screen;
accordingly, the second determination module 302 includes:
and the first determining submodule is used for determining a fingerprint image corresponding to the touch operation and performing fingerprint identification when the acting pressure is greater than or equal to a preset pressure threshold, the touch position is located in a preset identification area, and the acting duration is greater than the preset duration.
Optionally, referring to fig. 3C, the first determining module 301 includes:
the second determining submodule 3011 is configured to determine, through a pressure sensor of the display screen, an acting pressure of the touch operation on the display screen; or,
and a third determination sub-module 3012, configured to determine, based on the capacitance of the common electrode of the display screen, an acting pressure of the touch operation on the display screen.
Optionally, referring to fig. 3D, the first determining module 301 includes:
the detection submodule 3013 is configured to detect, for each of the plurality of intersecting electrodes on the display screen, a capacitance of the intersecting electrode when a touch operation is applied to the display screen;
the fourth determining submodule 3014 is configured to determine a difference between a capacitance of the cross electrode and a reference capacitance of the cross electrode when a touch operation is applied to the display screen, so as to obtain a capacitance difference of the cross electrode;
a fifth determining sub-module 3015, configured to determine, when a capacitance difference of at least one of the multiple crossed electrodes exceeds a preset capacitance, a position of the at least one crossed electrode on the display screen;
and a sixth determining sub-module 3016, configured to determine a location of an area surrounded by the location of the at least one crossed electrode on the display screen as a touch location of the touch operation.
Optionally, referring to fig. 3E, the first determining module 301 includes:
a seventh determining submodule 3017, configured to determine a current generated by the first electrode, a current generated by the second electrode, a current generated by the third electrode, and a current generated by the fourth electrode when a touch operation is applied to the display screen, where the first electrode, the second electrode, the third electrode, and the fourth electrode are electrodes respectively arranged at a first preset position, a second preset position, a third preset position, and a fourth preset position of a terminal where the display screen is located;
and an eighth determining submodule 3018 for determining a touch position of the touch operation on the display screen based on currents generated by electrodes adjacent to any three positions of the first electrode, the second electrode, the third electrode and the fourth electrode.
Optionally, referring to fig. 3F, the apparatus further comprises:
a fourth determining module 304, configured to determine that the touch position is located in the preset identification area when the central point of the touch position is located in the preset identification area; or,
a fifth determining module 305, configured to determine that the touch position is located in the preset recognition area when a distance between a center point of the touch position and a center point of the preset recognition area is smaller than the preset distance.
Optionally, referring to fig. 3G, the apparatus further comprises:
the first prompting module 306 is configured to determine a prompting mode when fingerprint identification is performed and an identification result is determined, and prompt the identification result through the prompting mode;
or
And a second prompting module 307, configured to determine a fingerprint image corresponding to the touch operation, perform fingerprint identification, and determine a prompting mode, and when the fingerprint identification is performed and an identification result is determined, prompt the identification result through the prompting mode.
In the embodiment of the disclosure, when a touch operation for performing fingerprint identification is detected on a display screen, an action pressure and a touch position of the touch operation on the display screen may be determined, and then when the action pressure is greater than or equal to a preset pressure threshold and the touch position is located in a preset identification area, a fingerprint image corresponding to the touch operation may be determined and fingerprint identification may be performed, that is, when a touch operation parameter of a user satisfies a certain condition, fingerprint identification may be performed again, so that an accuracy of fingerprint identification may be improved, and a fingerprint image corresponding to the touch operation does not need to be determined many times, thereby reducing power consumption of the terminal.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 4 is a block diagram of a fingerprint identification device 400 provided by an embodiment of the present disclosure. For example, the apparatus 400 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.
Referring to fig. 4, the apparatus 400 may include one or more of the following components: processing components 402, memory 404, power components 406, multimedia components 408, audio components 410, input/output (I/O) interfaces 412, sensor components 414, and communication components 416.
The processing component 402 generally controls overall operation of the apparatus 400, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 402 may include one or more processors 420 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 402 can include one or more modules that facilitate interaction between the processing component 402 and other components. For example, the processing component 402 can include a multimedia module to facilitate interaction between the multimedia component 408 and the processing component 402.
The memory 404 is configured to store various types of data to support operations at the apparatus 400. Examples of such data include instructions for any application or method operating on the device 400, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 404 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static 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), magnetic memory, flash memory, magnetic or optical disks.
Power supply components 406 provide power to the various components of device 400. The power components 406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power supplies for the apparatus 400.
The multimedia component 408 includes a screen that provides an output interface between the device 400 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 408 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the apparatus 400 is in an operation mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 410 is configured to output and/or input audio signals. For example, audio component 410 includes a Microphone (MIC) configured to receive external audio signals when apparatus 400 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 404 or transmitted via the communication component 416. In some embodiments, audio component 410 also includes a speaker for outputting audio signals.
The I/O interface 412 provides an interface between the processing component 402 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor component 414 includes one or more sensors for providing various aspects of status assessment for the apparatus 400. For example, the sensor assembly 414 may detect an open/closed state of the apparatus 400, the relative positioning of the components, such as a display and keypad of the apparatus 400, the sensor assembly 414 may also detect a change in the position of the apparatus 400 or a component of the apparatus 400, the presence or absence of user contact with the apparatus 400, orientation or acceleration/deceleration of the apparatus 400, and a change in the temperature of the apparatus 400. The sensor assembly 414 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 414 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 414 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 416 is configured to facilitate wired or wireless communication between the apparatus 400 and other devices. The apparatus 400 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 416 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 416 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 400 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.
In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 404 comprising instructions, executable by the processor 420 of the apparatus 400 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
A non-transitory computer readable storage medium having instructions therein, which when executed by a processor of a mobile terminal, enable the mobile terminal to perform a fingerprinting method, the method comprising:
when a touch operation for fingerprint identification is detected on the display screen, determining the acting pressure and the touch position of the touch operation on the display screen;
and when the acting pressure is greater than or equal to the preset pressure threshold and the touch position is located in the preset identification area, determining a fingerprint image corresponding to the touch operation and carrying out fingerprint identification.
Optionally, when the application pressure is greater than or equal to the preset pressure threshold and the touch position is located in the preset identification area, before determining the fingerprint image corresponding to the touch operation and performing fingerprint identification, the method further includes:
determining the acting time of the touch operation on the display screen;
correspondingly, when the acting pressure is greater than or equal to the preset pressure threshold and the touch position is located in the preset identification area, determining the fingerprint image corresponding to the touch operation and performing fingerprint identification, including:
and when the acting pressure is greater than or equal to a preset pressure threshold value, the touch position is located in a preset identification area, and the acting time is greater than the preset time, determining a fingerprint image corresponding to the touch operation and performing fingerprint identification.
Optionally, determining the acting pressure of the touch operation on the display screen includes:
determining the acting pressure of the touch operation on the display screen through a pressure sensor of the display screen; or,
determining the acting pressure of the touch operation on the display screen based on the capacitance of the common electrode of the display screen.
Optionally, determining a touch position of the touch operation on the display screen includes:
for each of a plurality of intersecting electrodes on a display screen, detecting a capacitance of the intersecting electrode when a touch operation is applied on the display screen;
determining a difference value between the capacitance of the crossed electrode and the reference capacitance of the crossed electrode when touch operation acts on the display screen to obtain a capacitance difference value of the crossed electrode;
when the capacitance difference value of at least one crossed electrode in the plurality of crossed electrodes exceeds a preset capacitance, determining the position of the at least one crossed electrode on the display screen;
and determining the position of an area surrounded by the position of the at least one crossed electrode on the display screen as the touch position of the touch operation.
Optionally, determining a touch position of the touch operation on the display screen includes:
determining a current generated by a first electrode, a current generated by a second electrode, a current generated by a third electrode and a current generated by a fourth electrode when a touch operation acts on the display screen, wherein the first electrode, the second electrode, the third electrode and the fourth electrode are electrodes respectively arranged at a first preset position, a second preset position, a third preset position and a fourth preset position of a terminal where the display screen is located;
and determining the touch position of the touch operation on the display screen based on the currents generated by the adjacent electrodes at any three positions of the first electrode, the second electrode, the third electrode and the fourth electrode.
Optionally, when the application pressure is greater than or equal to the preset pressure threshold and the touch position is located in the preset identification area, before determining the fingerprint image corresponding to the touch operation and performing fingerprint identification, the method further includes:
when the central point of the touch position is located in the preset identification area, determining that the touch position is located in the preset identification area; or,
and when the distance between the central point of the touch position and the central point of the preset identification area is smaller than the preset distance, determining that the touch position is located in the preset identification area.
Optionally, the method further comprises:
when fingerprint identification is carried out and an identification result is determined, determining a prompting mode, and prompting the identification result through the prompting mode;
or
And determining a fingerprint image corresponding to the touch operation, identifying the fingerprint, determining a prompting mode, and prompting the identification result through the prompting mode when the fingerprint identification is performed and the identification result is determined.
In the embodiment of the disclosure, when a touch operation for performing fingerprint identification is detected on a display screen, an action pressure and a touch position of the touch operation on the display screen may be determined, and then when the action pressure is greater than or equal to a preset pressure threshold and the touch position is located in a preset identification area, a fingerprint image corresponding to the touch operation may be determined and fingerprint identification may be performed, that is, when a touch operation parameter of a user satisfies a certain condition, fingerprint identification may be performed again, so that an accuracy of fingerprint identification may be improved, and a fingerprint image corresponding to the touch operation does not need to be determined many times, thereby reducing power consumption of the terminal.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (13)

1. A method of fingerprint identification, the method comprising:
when a touch operation for fingerprint identification is detected on a display screen, determining the acting pressure and the touch position of the touch operation on the display screen;
when the central point of the touch position is located in a preset identification area, determining that the touch position is located in the preset identification area; or,
when the distance between the center point of the touch position and the center point of the preset identification area is smaller than a preset distance, determining that the touch position is located in the preset identification area;
and when the action pressure is greater than or equal to a preset pressure threshold value and the touch position is located in the preset identification area, determining a fingerprint image corresponding to the touch operation and carrying out fingerprint identification, wherein the preset identification area is an area on a display screen corresponding to a fingerprint collector installed at the terminal.
2. The method of claim 1, wherein before determining the fingerprint image corresponding to the touch operation and performing fingerprint recognition when the applied pressure is greater than or equal to a preset pressure threshold and the touch position is in a preset recognition area, the method further comprises:
determining the acting time of the touch operation on the display screen;
correspondingly, when the acting pressure is greater than or equal to a preset pressure threshold and the touch position is located in a preset identification area, determining a fingerprint image corresponding to the touch operation and performing fingerprint identification, including:
and when the action pressure is greater than or equal to a preset pressure threshold value, the touch position is located in a preset identification area, and the action duration is greater than the preset duration, determining a fingerprint image corresponding to the touch operation and performing fingerprint identification.
3. The method of claim 1, wherein the determining the applied pressure of the touch operation on the display screen comprises:
determining the acting pressure of the touch operation on the display screen through a pressure sensor of the display screen; or,
determining an acting pressure of the touch operation on the display screen based on the capacitance of the common electrode of the display screen.
4. The method of claim 1, wherein the determining the touch location of the touch operation on the display screen comprises:
for each of a plurality of crossed electrodes on the display screen, detecting the capacitance of the crossed electrode when the touch operation acts on the display screen;
determining a difference value between the capacitance of the crossed electrode and the reference capacitance of the crossed electrode when the touch operation acts on the display screen to obtain a capacitance difference value of the crossed electrode;
when the capacitance difference value of at least one crossed electrode in the plurality of crossed electrodes exceeds a preset capacitance, determining the position of the at least one crossed electrode on the display screen;
and determining the position of an area surrounded by the position of the at least one crossed electrode on the display screen as the touch position of the touch operation.
5. The method of claim 1, wherein the determining the touch location of the touch operation on the display screen comprises:
determining a current generated by a first electrode, a current generated by a second electrode, a current generated by a third electrode and a current generated by a fourth electrode when the touch operation acts on the display screen, wherein the first electrode, the second electrode, the third electrode and the fourth electrode are electrodes respectively arranged at a first preset position, a second preset position, a third preset position and a fourth preset position of a terminal where the display screen is located;
and determining the touch position of the touch operation on the display screen based on the current generated by any three adjacent electrodes of the first electrode, the second electrode, the third electrode and the fourth electrode.
6. The method of claim 1, wherein the method further comprises:
when fingerprint identification is carried out and an identification result is determined, determining a prompting mode, and prompting the identification result through the prompting mode;
or
And determining a prompt mode while determining the fingerprint image corresponding to the touch operation and performing fingerprint identification, and prompting the identification result through the prompt mode when performing fingerprint identification and determining the identification result.
7. A fingerprint recognition apparatus, the apparatus comprising:
the fingerprint identification device comprises a first determination module, a second determination module and a third determination module, wherein the first determination module is used for determining the acting pressure and the touch position of the touch operation on a display screen when the touch operation for fingerprint identification is detected on the display screen;
the fourth determining module is used for determining that the touch position is located in a preset identification area when the central point of the touch position is located in the preset identification area; or,
a fifth determining module, configured to determine that the touch position is located in the preset identification area when a distance between a center point of the touch position and a center point of the preset identification area is smaller than a preset distance;
and the second determining module is used for determining the fingerprint image corresponding to the touch operation and performing fingerprint identification when the action pressure is greater than or equal to a preset pressure threshold value and the touch position is located in the preset identification area, wherein the preset identification area is an area on the display screen corresponding to the fingerprint collector installed at the terminal.
8. The apparatus of claim 7, wherein the apparatus further comprises:
the third determining module is used for determining the acting time of the touch operation on the display screen;
accordingly, the second determining module comprises:
and the first determining submodule is used for determining a fingerprint image corresponding to the touch operation and performing fingerprint identification when the action pressure is greater than or equal to a preset pressure threshold value, the touch position is located in a preset identification area, and the action duration is greater than the preset duration.
9. The apparatus of claim 7, wherein the first determining module comprises:
the second determining submodule is used for determining acting pressure of the touch operation on the display screen through a pressure sensor of the display screen; or,
and the third determining submodule is used for determining the acting pressure of the touch operation on the display screen based on the capacitance of the common electrode of the display screen.
10. The apparatus of claim 7, wherein the first determining module comprises:
the detection submodule is used for detecting the capacitance of each crossed electrode when the touch operation acts on the display screen for each crossed electrode in a plurality of crossed electrodes on the display screen;
the fourth determining submodule is used for determining the difference between the capacitance of the crossed electrode and the reference capacitance of the crossed electrode when the touch operation acts on the display screen to obtain the capacitance difference of the crossed electrode;
a fifth determining submodule, configured to determine a position of at least one crossed electrode on the display screen when a capacitance difference value of at least one crossed electrode among the plurality of crossed electrodes exceeds a preset capacitance;
and the sixth determining submodule is used for determining the position of an area surrounded by the position of the at least one crossed electrode on the display screen as the touch position of the touch operation.
11. The apparatus of claim 7, wherein the first determining module comprises:
a seventh determining submodule, configured to determine a current generated by the first electrode, a current generated by the second electrode, a current generated by the third electrode, and a current generated by the fourth electrode when the touch operation acts on the display screen, where the first electrode, the second electrode, the third electrode, and the fourth electrode are electrodes respectively arranged at a first preset position, a second preset position, a third preset position, and a fourth preset position of a terminal where the display screen is located;
an eighth determining submodule, configured to determine a touch position of the touch operation on the display screen based on the currents generated by the first electrode, the second electrode, the third electrode, and the fourth electrode.
12. The apparatus of claim 7, wherein the apparatus further comprises:
the first prompting module is used for determining a prompting mode when fingerprint identification is carried out and an identification result is determined, and prompting the identification result through the prompting mode;
or
And the second prompting module is used for determining a fingerprint image corresponding to the touch operation, identifying a prompting mode while identifying the fingerprint, and prompting the identification result through the prompting mode when identifying the fingerprint and determining the identification result.
13. A fingerprint recognition apparatus, the apparatus comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
when a touch operation for fingerprint identification is detected on a display screen, determining the acting pressure and the touch position of the touch operation on the display screen;
when the central point of the touch position is located in a preset identification area, determining that the touch position is located in the preset identification area; or,
when the distance between the center point of the touch position and the center point of the preset identification area is smaller than a preset distance, determining that the touch position is located in the preset identification area;
and when the action pressure is greater than or equal to a preset pressure threshold value and the touch position is located in the preset identification area, determining a fingerprint image corresponding to the touch operation and carrying out fingerprint identification, wherein the preset identification area is an area on a display screen corresponding to a fingerprint collector installed at the terminal.
CN201710032066.2A 2017-01-17 2017-01-17 Fingerprint identification method and device Active CN108319885B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN110837755A (en) * 2018-08-16 2020-02-25 北京小米移动软件有限公司 Fingerprint identification method and device
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CN110135330A (en) * 2019-05-13 2019-08-16 Oppo（重庆）智能科技有限公司 Fingerprint recognition feedback method, device, storage medium and electronic equipment

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