CN111241890A - Fingerprint identification method, device, equipment and storage medium - Google Patents
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- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
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- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/31—User authentication
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- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
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Abstract
The application discloses a fingerprint identification method, a fingerprint identification device, fingerprint identification equipment and a storage medium, and relates to the field of fingerprint identification. The method comprises the following steps: acquiring a touch event reported by a display screen; adjusting the brightness voltage of the HBM area to a calibration voltage according to the touch event; and acquiring a fingerprint identification result of the fingerprint sensor. According to the technical scheme, the intensity of light emitted in an HBM (high intensity modulation) region is ensured to be higher by keeping the brightness voltage at the calibration voltage, so that photon energy after light reflection is still higher, and a high-quality fingerprint image can be obtained when the fingerprint sensor performs fingerprint identification; in addition, the method also ensures the uniform light brightness, enables each beam of reflected light to be reflected under similar light sources to the maximum extent, and improves the integral recovery degree of the fingerprint; the success rate of fingerprint identification is integrally improved.
Description
Technical Field
The present disclosure relates to the field of fingerprint identification, and in particular, to a fingerprint identification method, apparatus, device, and storage medium.
Background
Nowadays, most of intelligent terminals can unlock screens through fingerprint identification.
In the related art, the optical fingerprint identification process of the intelligent terminal is as follows: screen or board emission light in a poor light, the hindrance of pressing the finger at fingerprint sensor top screen leads to the light reflection, and fingerprint sensor gathers reflection light, forms the image, compares fingerprint in the image with the password fingerprint of prestore, when fingerprint in the image and the password fingerprint of prestore match, then confirms the unblock screen.
However, the screen is in different environments and may be affected by ambient light, and when the reflected light collected by the fingerprint sensor becomes weak under the influence of the ambient light, the unlocking rate of the screen may be reduced.
Disclosure of Invention
The embodiment of the application provides a fingerprint identification method, a fingerprint identification device, fingerprint identification equipment and a fingerprint identification storage medium, and can solve the problem that environment light influences a fingerprint identification result. The technical scheme is as follows:
according to a first aspect of the present application, there is provided a fingerprint identification method applied to a terminal installed with a display screen, wherein a fingerprint sensor is arranged below the display screen, the method comprising:
acquiring a touch event reported by a display screen, wherein the touch event is generated according to touch operation on a highlight mode HBM area of the display screen, and the HBM area is an area above a fingerprint sensor;
adjusting the brightness voltage of the HBM area to a calibration voltage according to the touch event, wherein the calibration voltage is used for fingerprint acquisition;
and acquiring a fingerprint identification result of the fingerprint sensor, wherein the fingerprint identification result is obtained by identifying the fingerprint sensor according to a fingerprint identification image acquired by reflected light in the HBM area.
In some embodiments, adjusting the luminance voltage of the HBM region to a calibration voltage according to the touch event includes:
determining an HBM area corresponding to the touch operation according to the touch coordinates of the touch event;
and controlling the brightness voltage of the pixel points in the HBM area to be a calibration voltage.
In some embodiments, the display screen further comprises a display driver integrated circuit;
the control HBM regional luminance voltage of pixel point is calibration voltage, includes:
and outputting brightness voltage to pixel points of the HBM region through the display drive integrated circuit, wherein the brightness voltage is the same as the calibration voltage.
In some embodiments, the display driver integrated circuit includes a voltage comparator;
through showing the pixel output luminance voltage of drive integrated circuit to the HBM regional, include:
comparing the pixel point voltage with the calibration voltage through a voltage comparator;
when the pixel point voltage is equal to the calibration voltage, determining the pixel point voltage as a brightness voltage; when the pixel point voltage is not equal to the calibration voltage, determining the calibration voltage as a brightness voltage;
and outputting the brightness voltage to the pixel point of the HBM region through the display driving integrated circuit.
In some embodiments, the method further comprises:
when the user interface being displayed in the display screen is an interface related to fingerprint identification, executing a step of adjusting the brightness voltage of the HBM area to a calibration voltage according to a touch event;
wherein the interface related to fingerprint identification comprises at least one of the following interfaces: unlocking the interface, paying the interface, confirming the purchasing interface.
In some embodiments, the method further comprises:
acquiring an activity identifier positioned at the top of a stack from an interface activity stack of an operating system, wherein the activity identifier positioned at the top of the stack is used for indicating a user interface which is being displayed in a display screen;
and detecting whether the activity identifier positioned at the top of the stack is a target activity identifier, wherein the target activity identifier is an identifier corresponding to a user interface related to fingerprint identification.
In some embodiments, the method further comprises:
controlling pixel points of the HBM region to be at least two different brightness voltages in the calibration process;
acquiring at least two groups of fingerprint identification data obtained by a fingerprint sensor under at least two different brightness voltages, wherein the fingerprint identification data comprises a fingerprint identification image and/or a fingerprint identification result;
screening out target fingerprint identification data meeting performance conditions from at least two groups of fingerprint identification data;
and recording the brightness voltage corresponding to the target fingerprint identification data as a calibration voltage.
According to the second aspect of the application, a fingerprint identification device is provided, on being applied to the terminal of installing the display screen, the below of display screen is provided with fingerprint sensor, and the device includes:
the acquisition module is configured to acquire a touch event reported by the display screen, wherein the touch event is generated according to touch operation on a high-brightness mode HBM area of the display screen, and the HBM area is an area above the fingerprint sensor;
the calibration module is configured to adjust the brightness voltage of the HBM area to a calibration voltage according to the touch event, wherein the calibration voltage is used for fingerprint collection;
and the acquisition module is configured to acquire a fingerprint identification result of the fingerprint sensor, and the fingerprint identification result is obtained by identifying the fingerprint sensor according to a fingerprint identification image acquired by reflected light in the HBM area.
In some embodiments, a calibration module, comprising:
the determining submodule is configured to determine an HBM area corresponding to the touch operation according to the touch coordinates of the touch event;
and the control submodule is configured to control the brightness voltage of the pixel points of the HBM region to be a calibration voltage.
In some embodiments, the display screen further comprises a display driver integrated circuit;
and the control submodule is configured to output the brightness voltage to the pixel point of the HBM region through the display driving integrated circuit, and the brightness voltage is the same as the calibration voltage.
In some embodiments, the display driver integrated circuit further comprises a voltage comparator;
the control submodule is configured to compare the pixel point voltage with the calibration voltage through the voltage comparator; when the pixel point voltage is equal to the calibration voltage, determining the pixel point voltage as a brightness voltage; when the pixel point voltage is not equal to the calibration voltage, determining the calibration voltage as a brightness voltage; and outputting the brightness voltage to the pixel point of the HBM region through the display driving integrated circuit.
In some embodiments, the calibration module is configured to perform the step of adjusting the brightness voltage of the HBM region to a calibration voltage according to a touch event when the user interface being displayed in the display screen is an interface related to fingerprint recognition; wherein the interface related to fingerprint identification comprises at least one of the following interfaces: unlocking the interface, paying the interface, confirming the purchasing interface.
In some embodiments, the apparatus further comprises:
the acquisition module is configured to acquire an activity identifier positioned at the top of the stack from an interface activity stack of the operating system, wherein the activity identifier positioned at the top of the stack is used for indicating a user interface which is being displayed in a display screen;
and the detection module is configured to detect whether the activity identifier positioned at the top of the stack is a target activity identifier, and the target activity identifier is an identifier corresponding to a user interface related to fingerprint identification.
In some embodiments, the apparatus further comprises:
the calibration module is configured to control pixel points of the HBM area to be at least two different brightness voltages in a calibration process;
the fingerprint identification device comprises an acquisition module, a processing module and a control module, wherein the acquisition module is configured to acquire at least two groups of fingerprint identification data obtained by a fingerprint sensor under at least two different brightness voltages, and the fingerprint identification data comprises a fingerprint identification image and/or a fingerprint identification result;
the screening module is configured to screen out target fingerprint identification data meeting performance conditions from at least two groups of fingerprint identification data;
and the recording module is configured to record the brightness voltage corresponding to the target fingerprint identification data as the calibration voltage.
According to a third aspect of the present application, there is provided a terminal comprising a processor and a memory, the memory having stored therein at least one instruction, at least one program, set of codes, or set of instructions, which is loaded and executed by the processor to implement the fingerprint recognition method according to any one of the first aspect above.
According to a fourth aspect of the present application, there is provided a computer readable storage medium having stored therein at least one instruction, at least one program, set of codes, or set of instructions, which is loaded and executed by the processor to implement the fingerprint identification method according to any one of the first aspect above.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:
acquiring a touch event reported by a display screen, adjusting the brightness voltage of the HBM area to a calibration voltage according to the touch event, and acquiring reflected light rays in the HBM area by a fingerprint sensor under the brightness voltage to obtain a fingerprint identification result; through keeping luminance voltage at calibration voltage, guarantee that HBM is regional in the intensity of emission light higher to make the photon energy after the light reflection still higher, when fingerprint sensor carries out fingerprint identification, can obtain high-quality fingerprint image, promote fingerprint identification's success rate.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a block diagram of an electronic device provided in an exemplary embodiment of the present application;
FIG. 2 is a block diagram of an electronic device provided in another exemplary embodiment of the present application;
FIG. 3 is a flow chart of a fingerprint identification method provided by an exemplary embodiment of the present application;
FIG. 4 is a flow chart of a fingerprint identification method provided by another exemplary embodiment of the present application;
FIG. 5 is a flow chart of a fingerprint identification method provided by another exemplary embodiment of the present application;
FIG. 6 is a flow chart of a fingerprint identification method provided by another exemplary embodiment of the present application;
FIG. 7 is a block diagram of a fingerprint recognition device provided in an exemplary embodiment of the present application;
FIG. 8 is a block diagram of a fingerprint recognition device provided in another exemplary embodiment of the present application;
fig. 9 is a block diagram of a fingerprint recognition device according to another exemplary embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
First, several terms related to the embodiments of the present application are explained:
OLED, a kind of display. The OLED Display technology is different from the conventional LCD (Liquid Crystal Display) Display mode, and the OLED uses a very thin organic material coating and a glass substrate, so that when a current flows, the organic material emits light without a backlight.
The HBM (High Brightness module) refers to an area of the OLED corresponding to the fingerprint sensor, and generates High-Brightness light when the module receives a touch operation.
Fig. 1 is a block diagram of an electronic device provided in an exemplary embodiment of the present application, the electronic device including: an OLED101, a fingerprint sensor 103, a processing unit 104, and a display driving integrated circuit 105.
As shown in fig. 1, a direction indicated by an arrow is a line of sight direction of a user viewing a screen, one side of the OLED101 opposite to the line of sight direction is a front side of the OLED101, the other side is a back side of the OLED101, and the optical fingerprint identification module 103 and the back side of the OLED101 are fixed together by a transparent adhesive layer 102.
The OLED101 is electrically connected to the display driving integrated circuit 105, and under the driving of the display driving integrated circuit 105, a pixel point on the OLED101 emits light.
The OLED101 is further electrically connected to the processing unit 104, and when the OLED101 receives a touch event triggered by a user, the OLED101 reports the touch event to the processing unit 104. Wherein the OLED101 supports zonal brightness adjustment.
The processing unit 104 is electrically connected to the display driving integrated circuit 105. Referring to fig. 2, the OLED101 includes thereon an HBM region 11, which is a region located above the fingerprint sensor 103. In the process of fingerprint identification, the processing unit 104 controls the brightness voltage of the HBM area 11 of the OLED101 to be kept at the calibration voltage according to the touch event reported by the OLED 101.
The fingerprint sensor 103 is electrically connected to the processing unit 104. When a finger touches the HBM area 11 of the OLED101, light emitted by the HBM area 11 is reflected by the finger to form reflected light, and the fingerprint sensor 103 collects the reflected light to obtain a fingerprint image; the processing unit 104 further includes a security area, and the fingerprint sensor 103 sends the acquired fingerprint image to the security area for comparison to obtain a fingerprint identification result.
Fig. 3 is a flowchart of a fingerprint identification method according to an exemplary embodiment of the present application, for example, when the method is applied to the electronic device shown in fig. 1, the method includes:
The display screen comprises an HBM area which is an area above the fingerprint sensor, and the touch event is generated according to a touch operation on the HBM area of the display screen.
Illustratively, a user touches an HBM area of a display screen, and the display screen receives a touch signal, generates a touch event, and reports the touch event to a processing unit.
In step 202, the brightness voltage of the HBM region is adjusted to a calibration voltage according to the touch event.
The processing unit adjusts the brightness voltage of the HBM area to a calibration voltage according to the touch event, wherein the calibration voltage is a voltage used for fingerprint collection. The HBM region emits light at a calibration voltage.
The finger of the user is positioned on the HBM area, and the light is transmitted to the finger to be reflected to form reflected light; the reflected light is transmitted to the fingerprint sensor through the display screen; the fingerprint sensor collects reflected light to form a fingerprint image, and the fingerprint image is sent to the processing unit; the processing unit comprises a safe area, and the processing unit performs fingerprint identification on the safe area to obtain a fingerprint identification result.
In summary, the present embodiment provides a fingerprint identification method, in which a touch event reported by a display screen is obtained; adjusting the brightness voltage of the HBM area to a calibration voltage according to the touch event; and acquiring a fingerprint identification result of the fingerprint sensor. According to the method, the intensity of light emitted in an HBM (high-intensity metal) region is ensured to be higher by keeping the brightness voltage at the calibration voltage, so that the photon energy after the light is reflected is still higher, and a high-quality fingerprint image can be obtained when a fingerprint sensor performs fingerprint identification; in addition, the method also ensures the uniform light brightness, enables each beam of reflected light to be reflected under similar light sources to the maximum extent, and improves the integral recovery degree of the fingerprint; the success rate of fingerprint identification is integrally improved.
Fig. 4 is a flowchart of a fingerprint identification method according to another exemplary embodiment of the present application, taking the method as an example for being applied to the electronic device shown in fig. 1, it should be noted that, based on fig. 3, the method replaces step 202 with step 2021 to step 2022, which are detailed descriptions of adjustment of the luminance voltage, and the steps are as follows:
The processing unit acquires touch coordinates when a touch event occurs on the display screen, determines that the touch operation occurs on the HBM area through the touch coordinates, and triggers the subsequent operation.
In some embodiments, the display screen includes a display driver integrated circuit; the processing unit controls the display driving integrated circuit, and outputs brightness voltage to the pixel points in the HBM area through the display driving integrated circuit, wherein the brightness voltage is the same as the calibration voltage.
Optionally, the display driving integrated circuit includes a voltage comparator, the pixel voltage is input to the voltage comparator, and meanwhile, the voltage comparator is input to the calibration voltage, and the pixel voltage and the calibration voltage are compared by the voltage comparator; when the pixel point voltage is equal to the calibration voltage, determining the pixel point voltage as a brightness voltage; when the pixel point voltage is not equal to the calibration voltage, determining the calibration voltage as a brightness voltage; and outputting the brightness voltage to the pixel point of the HBM region through a display driving integrated circuit. Optionally, the calibration voltage is a predetermined threshold.
Optionally, the voltage comparator includes at least one of a single-limit comparator, a hysteresis comparator, a window comparator, and a tri-state comparator.
Illustratively, a pixel point is input into a voltage comparator from a positive phase input end, a calibration voltage is input into the voltage comparator from a negative phase input end, whether the pixel point voltage is the same as the calibration voltage or not is determined through the voltage comparator, when the pixel point voltage is the same as the calibration voltage, the voltage comparator gives a high level signal, a display drive integrated circuit receives the high level signal, and the voltage output to the pixel point of the HBM area is determined to be unchanged; when the pixel point voltage is different from the calibration voltage, the voltage comparator gives a low level signal, and the display driving integrated circuit receives the low level signal and determines to output the calibration voltage to the pixel point of the HBM area.
In summary, the present embodiment provides a fingerprint identification method, in which a touch event reported by a display screen is obtained; according to the touch event, determining to adjust the brightness voltage of the HBM area to a calibration voltage through a voltage comparator; and acquiring a fingerprint identification result of the fingerprint sensor. According to the method, the intensity of light emitted in an HBM (high-intensity metal) region is ensured to be higher by keeping the brightness voltage at the calibration voltage, so that the photon energy after the light is reflected is still higher, and a high-quality fingerprint image can be obtained when a fingerprint sensor performs fingerprint identification; in addition, the method also ensures the uniform light brightness, enables each beam of reflected light to be reflected under similar light sources to the maximum extent, and improves the integral recovery degree of the fingerprint; the success rate of fingerprint identification is integrally improved.
Fig. 5 is a flowchart of a fingerprint identification method according to another exemplary embodiment of the present application, for example, when the method is applied to the electronic device shown in fig. 1, the method includes:
This step is referred to as step 201 and will not be described herein again.
Step 302, detecting whether the user interface being displayed in the display screen is an interface related to fingerprint identification.
The processing unit receives a touch event and acquires an activity identifier positioned at the top of the stack from an interface activity stack of an operating system, wherein the activity identifier positioned at the top of the stack is used for indicating a user interface which is being displayed in a display screen; and detecting whether the activity identifier positioned at the top of the stack is a target activity identifier, wherein the target activity identifier is an identifier corresponding to a user interface related to fingerprint identification.
When the active identifier at the top of the stack is the target active identifier, it is determined that the user interface being displayed in the display screen is an interface related to fingerprint recognition, and step 303 is performed.
When the active identifier at the top of the stack is not the target active identifier, it is determined that the user interface being displayed in the display screen is not an interface associated with fingerprint recognition, step 305 is performed.
In some embodiments, the target activity identifier is an activity identifier of an interface which is stored in the terminal in advance and is related to fingerprint identification; detecting whether the activity identifier located at the top of the stack is the target activity identifier comprises: judging whether the active identifier positioned at the top of the stack is matched with an active identifier of an interface which is prestored in the terminal and is related to fingerprint identification; if so, determining that the activity identifier positioned at the top of the stack is a target activity identifier; and if not, determining that the active identifier positioned at the top of the stack is not the target active identifier.
Optionally, the interface related to fingerprint identification includes at least one of the following interfaces: unlocking the interface, paying the interface, confirming the purchasing interface.
When the user interface being displayed in the display screen is an interface related to fingerprint recognition, the processing unit adjusts the brightness voltage of the HBM region to the calibration voltage according to the touch event, and the HBM region emits light at the calibration voltage, and continues to execute step 304.
This step is referred to as step 204 and will not be described herein.
Schematically, taking a user interface being displayed in a display screen as an unlocking interface as an example, a user touches an HBM area of the display screen, the display screen receives a touch signal, generates a touch event, and reports the touch event to a processing unit.
After receiving the touch event, the processing unit acquires an activity identifier of an activity positioned at the top of a stack in an interface activity stack of an operating system according to the touch event, and detects whether the activity identifier is a target activity identifier, at the moment, the activity positioned at the top of the stack is an unlocking interface activity, and the activity identifier of the unlocking interface is a target activity identifier; the processing unit also adjusts a luminance voltage of the HBM region to a calibration voltage at which the HBM region emits light according to the touch event.
Light propagates and takes place the reflection to form reflection light on to the finger, and reflection light sees through the display screen and propagates to fingerprint sensor, and fingerprint sensor gathers reflection light, forms fingerprint image to send fingerprint image to processing unit.
The processing unit performs fingerprint identification in the secure area, and determines to unlock when the fingerprint matches a fingerprint pre-stored in the secure area.
In summary, the present embodiment provides a fingerprint identification method, in which a touch event reported by a display screen is obtained; adjusting the brightness voltage of the HBM area to a calibration voltage according to the touch event; and acquiring a fingerprint identification result of the fingerprint sensor. According to the method, the intensity of light emitted in an HBM (high-intensity metal) region is ensured to be higher by keeping the brightness voltage at the calibration voltage, so that the photon energy after the light is reflected is still higher, and a high-quality fingerprint image can be obtained when a fingerprint sensor performs fingerprint identification; in addition, the method also ensures the uniform light brightness, enables each beam of reflected light to be reflected under similar light sources to the maximum extent, and improves the integral recovery degree of the fingerprint; the success rate of fingerprint identification is integrally improved.
In the embodiment, when the user interface is determined to be the interface related to fingerprint identification, fingerprint identification is carried out; when the user interface is an interface irrelevant to fingerprint identification, the step of fingerprint identification is stopped, unnecessary operation is effectively avoided, and power consumption is reduced.
Fig. 6 is a flowchart of a fingerprint identification method according to another exemplary embodiment of the present application, for example, when the method is applied to the electronic device shown in fig. 1, it should be noted that, in some embodiments, the calibration voltage is determined by the terminal in a calibration process, and the method illustrates a determination process of the calibration voltage, and includes the following steps:
The processing unit controls the pixel points of the HBM area to be at two or more than two brightness voltages, and each brightness voltage is different from other brightness voltages. Executing the step of acquiring the fingerprint identification result of the fingerprint sensor under different brightness voltages; the storage unit of the terminal buffers the fingerprint identification data under each brightness voltage.
The processing unit acquires fingerprint identification data obtained by the fingerprint sensor under two or more than two brightness voltages; wherein one brightness voltage corresponds to one set of fingerprint identification data.
And step 403, screening out target fingerprint identification data meeting the performance condition from at least two groups of fingerprint identification data.
The fingerprint identification data comprises a fingerprint identification image and/or a fingerprint identification result.
Optionally, the fingerprint identification image includes at least one of a frame number of the acquired fingerprint image and a quality of the fingerprint image; the fingerprint identification result comprises at least one of the time length for fingerprint identification and the fingerprint matching degree.
In some embodiments, the processing unit screens out the target fingerprint identification data meeting the performance condition according to the time length used for fingerprint identification, for example, screens out a group of fingerprint identification data with the shortest time length used for fingerprint identification in the acquired fingerprint identification data, and determines the group of fingerprint identification data as the target fingerprint identification data.
In some embodiments, the processing unit screens out target fingerprint identification data meeting the performance condition according to the number of frames of the acquired fingerprint images, for example, screens out a group of fingerprint identification data with the minimum number of frames of the acquired fingerprint images, and determines the group of fingerprint identification data as the target fingerprint identification data.
In some embodiments, the processing unit screens out the target fingerprint identification data meeting the performance condition according to the fingerprint matching degree, for example, screens out a group of fingerprint identification data with the highest fingerprint matching degree, and determines the group of fingerprint identification data as the target fingerprint identification data.
Optionally, in the fingerprint identification process, the luminance voltage of the pixel point in the HBM region and the corresponding fingerprint identification data form a mapping relationship, and the processing unit obtains the luminance voltage corresponding to the target fingerprint identification data through the mapping relationship and records the luminance voltage as the calibration voltage.
Schematically, referring to table 1, in the calibration process, the processing unit controls the pixel point in the HBM region to be at the first brightness voltage, and performs the step of "obtaining the fingerprint identification result of the fingerprint sensor"; meanwhile, the storage unit of the terminal caches the fingerprint identification data under the first brightness voltage and marks the fingerprint identification data as a first group of fingerprint identification data.
The processing unit controls pixel points of the HBM area to be at a second brightness voltage, and executes the step of acquiring a fingerprint identification result of the fingerprint sensor; meanwhile, the storage unit of the terminal caches the fingerprint identification data under the second brightness voltage and marks the fingerprint identification data as second fingerprint identification data. Wherein the first brightness voltage is different from the second brightness voltage.
The processing unit acquires the first group of fingerprint identification data and the second group of fingerprint identification data cached in the storage unit.
TABLE 1
| Luminance voltage | Data set |
| First brightness voltage | First set of fingerprint identification data |
| Second brightness voltage | Second set of fingerprint identification data |
The fingerprint data includes a brightness voltage at the time of fingerprint identification and a time period used for fingerprint identification. The processing unit judges the time consumption of fingerprint identification in the two groups of fingerprint identification data, wherein the time consumption of fingerprint identification is displayed in the first group of fingerprint identification data in the table 2 for 0.50s, and the time consumption of fingerprint identification is displayed in the second group of fingerprint identification data for 0.45 s; the time for fingerprint identification in the second set of fingerprint identification data is shorter, and the second set of fingerprint identification data is determined as the target fingerprint identification data.
The processing unit acquires a second brightness voltage corresponding to the second group of fingerprint identification data according to the mapping relation in the table 1, and records the second brightness voltage as a calibration voltage.
TABLE 2
| Duration of fingerprint identification | |
| First set of fingerprint identification data | 0.50s |
| Second set of fingerprint identification data | 0.45s |
In summary, in the calibration voltage calibration method provided in this embodiment, the pixel points in the HBM region are controlled to be at least two different brightness voltages in the calibration process; acquiring at least two groups of fingerprint identification data obtained by the fingerprint sensor at least two different brightness voltages; screening out target fingerprint identification data meeting performance conditions from at least two groups of fingerprint identification data; and recording the brightness voltage corresponding to the target fingerprint identification data as a calibration voltage. According to the method, the calibration voltage is determined according to the actual condition of fingerprint identification when the user uses the method, higher identification efficiency is obtained under the respective calibration voltage obtained by each person, and the user experience is improved.
Fig. 7 is a block diagram of a fingerprint identification device provided in an exemplary embodiment of the present application, which may be implemented as a part of or all of an electronic device by hardware, software, or a combination of the two, and the fingerprint identification device includes:
an obtaining module 501, configured to obtain a touch event reported by a display screen, where the touch event is generated according to a touch operation on a highlight mode HBM area of the display screen, and the HBM area is an area located above a fingerprint sensor;
a calibration module 502 configured to adjust a brightness voltage of the HBM region to a calibration voltage according to a touch event, the calibration voltage being a voltage for fingerprint acquisition;
the obtaining module 501 is configured to obtain a fingerprint identification result of the fingerprint sensor, where the fingerprint identification result is obtained by identifying the fingerprint sensor according to a fingerprint identification image collected by reflected light in the HBM area.
In summary, the present embodiment provides a fingerprint identification apparatus, which obtains a touch event reported by a display screen; adjusting the brightness voltage of the HBM area to a calibration voltage according to the touch event; and acquiring a fingerprint identification result of the fingerprint sensor. According to the method, the intensity of light emitted in an HBM (high-intensity metal) region is ensured to be higher by keeping the brightness voltage at the calibration voltage, so that the photon energy after the light is reflected is still higher, and a high-quality fingerprint image can be obtained when a fingerprint sensor performs fingerprint identification; in addition, the device also ensures the uniform light brightness, each beam of reflected light is reflected under similar light sources to the maximum extent, and the integral restoration degree of the fingerprint is improved; the success rate of fingerprint identification is integrally improved.
Fig. 8 is a block diagram of a fingerprint identification device according to another exemplary embodiment of the present application, which may be implemented as a part of or an entire electronic device by hardware, software, or a combination of the two, and the device includes:
an obtaining module 501, configured to obtain a touch event reported by a display screen, where the touch event is generated according to a touch operation on a highlight mode HBM area of the display screen, and the HBM area is an area located above a fingerprint sensor;
a calibration module 502 configured to adjust a brightness voltage of the HBM region to a calibration voltage according to a touch event, the calibration voltage being a voltage for fingerprint acquisition;
the obtaining module 501 is configured to obtain a fingerprint identification result of the fingerprint sensor, where the fingerprint identification result is obtained by identifying the fingerprint sensor according to a fingerprint identification image collected by reflected light in the HBM area.
In some embodiments, the calibration module 502 includes:
the determining submodule 5021 is configured to determine an HBM area corresponding to a touch operation according to the touch coordinates of the touch event;
the control submodule 5022 is configured to control the brightness voltage of the pixel point of the HBM region to be the calibration voltage.
In some embodiments, the display screen further comprises a display driver integrated circuit;
and the control submodule 5022 is configured to output the brightness voltage to the pixel point of the HBM region through the display driving integrated circuit, wherein the brightness voltage is the same as the calibration voltage.
In some embodiments, the display driver integrated circuit further comprises a voltage comparator;
the control submodule 5022 is configured to compare the pixel point voltage with the calibration voltage through the voltage comparator; when the pixel point voltage is equal to the calibration voltage, determining the pixel point voltage as a brightness voltage; when the pixel point voltage is not equal to the calibration voltage, determining the calibration voltage as a brightness voltage; and outputting the brightness voltage to the pixel point of the HBM region through the display driving integrated circuit.
In some embodiments, the calibration module 502 is configured to perform the step of adjusting the brightness voltage of the HBM region to a calibration voltage according to a touch event when the user interface being displayed in the display screen is an interface related to fingerprint recognition; wherein the interface related to fingerprint identification comprises at least one of the following interfaces: unlocking the interface, paying the interface, confirming the purchasing interface.
In some embodiments, the apparatus further comprises:
an obtaining module 501, configured to obtain an activity identifier located at a stack top from an interface activity stack of an operating system, where the activity identifier located at the stack top is used to indicate a user interface being displayed in a display screen;
a detecting module 503, configured to detect whether the activity identifier at the top of the stack is a target activity identifier, where the target activity identifier is an identifier corresponding to a user interface related to fingerprint recognition.
In some embodiments, the apparatus further comprises:
a calibration module 502 configured to control pixel points of the HBM region to be at least two different luminance voltages during a calibration process;
an acquiring module 501 configured to acquire at least two sets of fingerprint identification data obtained by a fingerprint sensor under at least two different brightness voltages, where the fingerprint identification data includes a fingerprint identification image and/or a fingerprint identification result;
a filtering module 504 configured to filter out target fingerprint identification data meeting the performance condition from the at least two groups of fingerprint identification data;
and a recording module 505 configured to record the brightness voltage corresponding to the target fingerprint identification data as a calibration voltage.
In summary, the present embodiment provides a fingerprint identification apparatus, which obtains a touch event reported by a display screen; adjusting the brightness voltage of the HBM area to a calibration voltage according to the touch event; and acquiring a fingerprint identification result of the fingerprint sensor. According to the method, the intensity of light emitted in an HBM (high-intensity metal) region is ensured to be higher by keeping the brightness voltage at the calibration voltage, so that the photon energy after the light is reflected is still higher, and a high-quality fingerprint image can be obtained when a fingerprint sensor performs fingerprint identification; in addition, the device also ensures the uniform light brightness, each beam of reflected light is reflected under similar light sources to the maximum extent, and the integral restoration degree of the fingerprint is improved; the success rate of fingerprint identification is integrally improved.
In the embodiment, when the user interface is determined to be the interface related to fingerprint identification, fingerprint identification is carried out; when the user interface is an interface irrelevant to fingerprint identification, the step of fingerprint identification is stopped, unnecessary operation is effectively avoided, and power consumption is reduced.
Fig. 9 is a block diagram of a fingerprint recognition device 600 according to an exemplary embodiment of the present application. For example, the apparatus 600 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. 9, the apparatus 600 may include one or more of the following components: processing component 602, memory 604, power component 606, multimedia component 608, audio component 610, input/output (I/O) interface 612, sensor component 614, and communication component 616.
The processing component 602 generally controls overall operation of the device 600, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 602 may include one or more processors 618 to execute instructions to perform all or a portion of the steps performed by the UE20 in the above-described method embodiments. Further, the processing component 602 can include one or more modules that facilitate interaction between the processing component 602 and other components. For example, the processing component 602 can include a multimedia module to facilitate interaction between the multimedia component 608 and the processing component 602.
The memory 604 is configured to store various types of data to support operations at the apparatus 600. Examples of such data include instructions for any application or method operating on device 600, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 604 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.
The multimedia component 608 includes a screen that provides an output interface between the device 600 and a 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 608 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 device 600 is in an operating mode, such as a shooting 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 610 is configured to output and/or input audio signals. For example, audio component 610 includes a Microphone (MIC) configured to receive external audio signals when apparatus 600 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal may further be stored in the memory 604 or transmitted via the communication component 616. In some embodiments, audio component 610 further includes a speaker for outputting audio signals.
The I/O interface 612 provides an interface between the processing component 602 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 614 includes one or more sensors for providing status assessment of various aspects of the apparatus 600. For example, the sensor component 614 may detect an open/closed state of the device 600, the relative positioning of components, such as a display and keypad of the device 600, the sensor component 614 may also detect a change in position of the device 600 or a component of the device 600, the presence or absence of user contact with the device 600, orientation or acceleration/deceleration of the device 600, and a change in temperature of the device 600. The sensor assembly 614 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 614 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 614 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 616 is configured to facilitate communications between the apparatus 600 and other devices in a wired or wireless manner. The apparatus 600 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 616 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 616 further includes a Near Field Communication (NFC) module to facilitate short-range communications.
In an exemplary embodiment, the apparatus 600 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 fingerprint recognition method in the above method embodiments.
In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as memory 604 comprising instructions, executable by processor 618 of apparatus 600 to perform the fingerprint identification method of the above method embodiments 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.
In an exemplary embodiment, a computer readable storage medium is also provided, and the computer readable storage medium is a non-volatile computer readable storage medium, and a computer program is stored in the computer readable storage medium, and when executed by a processing component, the stored computer program can implement the fingerprint identification method provided by the above-mentioned embodiment of the present disclosure.
The disclosed embodiments also provide a computer program product having instructions stored therein, which when run on a computer, enable the computer to perform the fingerprint identification method provided by the disclosed embodiments.
The disclosed embodiment also provides a chip, which comprises a programmable logic circuit and/or a program instruction, and when the chip runs, the fingerprint identification method provided by the disclosed embodiment can be executed.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure 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 present disclosure is limited only by the appended claims.
Claims (16)
1. A fingerprint identification method is characterized by being applied to a terminal provided with a display screen, wherein a fingerprint sensor is arranged below the display screen, and the method comprises the following steps:
acquiring a touch event reported by the display screen, wherein the touch event is generated according to touch operation on a highlight mode HBM area of the display screen, and the HBM area is an area above the fingerprint sensor;
adjusting the brightness voltage of the HBM area to a calibration voltage according to the touch event, wherein the calibration voltage is used for fingerprint acquisition;
and acquiring a fingerprint identification result of the fingerprint sensor, wherein the fingerprint identification result is obtained by identifying the fingerprint sensor according to a fingerprint identification image acquired by reflected light in the HBM area.
2. The method according to claim 1, wherein the adjusting the luminance voltage of the HBM region to a calibration voltage according to the touch event comprises:
determining the HBM area corresponding to the touch operation according to the touch coordinates of the touch event;
and controlling the brightness voltage of the pixel points of the HBM region to be the calibration voltage.
3. The method of claim 2, wherein the display screen further comprises a display driver integrated circuit;
the controlling the brightness voltage of the pixel point of the HBM region to be the calibration voltage includes:
and outputting the brightness voltage to pixel points of the HBM region through the display driving integrated circuit, wherein the brightness voltage is the same as the calibration voltage.
4. The method of claim 3, wherein the display driver integrated circuit comprises a voltage comparator;
the outputting the brightness voltage to the pixel point of the HBM region through the display driving integrated circuit includes:
comparing the pixel point voltage with the calibration voltage through a voltage comparator;
when the pixel point voltage is equal to the calibration voltage, determining the pixel point voltage as the brightness voltage; when the pixel point voltage is not equal to the calibration voltage, determining the calibration voltage as the brightness voltage;
and outputting the brightness voltage to pixel points of the HBM region through the display driving integrated circuit.
5. The method of any of claims 1 to 4, further comprising:
when the user interface being displayed in the display screen is an interface related to fingerprint identification, executing the step of adjusting the brightness voltage of the HBM area to a calibration voltage according to the touch event;
wherein the interface related to fingerprint identification comprises at least one of the following interfaces: unlocking the interface, paying the interface, confirming the purchasing interface.
6. The method of claim 5, further comprising:
acquiring an activity identifier positioned at the top of a stack from an interface activity stack of an operating system, wherein the activity identifier positioned at the top of the stack is used for indicating a user interface which is being displayed in the display screen;
and detecting whether the activity identifier positioned at the top of the stack is a target activity identifier, wherein the target activity identifier is an identifier corresponding to a user interface related to the fingerprint identification.
7. The method of any of claims 1 to 4, further comprising:
controlling pixel points of the HBM region to be at least two different brightness voltages in a calibration process;
acquiring at least two groups of fingerprint identification data obtained by the fingerprint sensor under the at least two different brightness voltages, wherein the fingerprint identification data comprises a fingerprint identification image and/or a fingerprint identification result;
screening out target fingerprint identification data meeting performance conditions from the at least two groups of fingerprint identification data;
and recording the brightness voltage corresponding to the target fingerprint identification data as the calibration voltage.
8. The utility model provides a fingerprint identification device, its characterized in that is applied to on the terminal of installing the display screen, the below of display screen is provided with fingerprint sensor, the device includes:
the acquisition module is configured to acquire a touch event reported by the display screen, wherein the touch event is generated according to touch operation on a high-brightness mode (HBM) area of the display screen, and the HBM area is an area above the fingerprint sensor;
a calibration module configured to adjust a brightness voltage of the HBM region to a calibration voltage according to the touch event, the calibration voltage being a voltage for fingerprint acquisition;
the acquisition module is configured to acquire a fingerprint identification result of the fingerprint sensor, wherein the fingerprint identification result is obtained by identifying the fingerprint sensor according to a fingerprint identification image acquired by reflected light in the HBM area.
9. The apparatus of claim 8, wherein the calibration module comprises:
a determining submodule configured to determine the HBM region corresponding to the touch operation according to the touch coordinates of the touch event;
a control sub-module configured to control the luminance voltage of the pixel points of the HBM region to be the calibration voltage.
10. The device of claim 9, wherein the display screen further comprises a display driver integrated circuit;
the control submodule is configured to output the brightness voltage to a pixel point of the HBM region through the display driving integrated circuit, and the brightness voltage is the same as the calibration voltage.
11. The device of claim 10, wherein the display driver integrated circuit further comprises a voltage comparator;
the control submodule is configured to compare the pixel point voltage with the calibration voltage through a voltage comparator; when the pixel point voltage is equal to the calibration voltage, determining the pixel point voltage as the brightness voltage; when the pixel point voltage is not equal to the calibration voltage, determining the calibration voltage as the brightness voltage; and outputting the brightness voltage to pixel points of the HBM region through the display driving integrated circuit.
12. The apparatus according to any one of claims 8 to 11,
the calibration module is configured to perform the step of adjusting the brightness voltage of the HBM area to a calibration voltage according to the touch event when the user interface being displayed in the display screen is an interface related to fingerprint recognition; wherein the interface related to fingerprint identification comprises at least one of the following interfaces: unlocking the interface, paying the interface, confirming the purchasing interface.
13. The apparatus of claim 12, further comprising:
the obtaining module is configured to obtain an activity identifier located at the top of a stack from an interface activity stack of an operating system, where the activity identifier located at the top of the stack is used to indicate a user interface being displayed in the display screen;
a detection module configured to detect whether the activity identifier at the top of the stack is a target activity identifier, where the target activity identifier is an identifier corresponding to a user interface related to the fingerprint recognition.
14. The apparatus of any one of claims 8 to 11, further comprising:
the calibration module is configured to control pixel points of the HBM region to be at least two different brightness voltages in a calibration process;
the acquisition module is configured to acquire at least two groups of fingerprint identification data obtained by the fingerprint sensor under the at least two different brightness voltages, wherein the fingerprint identification data comprises a fingerprint identification image and/or a fingerprint identification result;
the screening module is configured to screen out target fingerprint identification data meeting performance conditions from the at least two groups of fingerprint identification data;
and the recording module is configured to record the brightness voltage corresponding to the target fingerprint identification data as the calibration voltage.
15. A terminal, characterized in that it comprises a processor and a memory, in which at least one instruction, at least one program, set of codes or set of instructions is stored, which is loaded and executed by the processor to implement the fingerprinting method according to any one of claims 1 to 7.
16. A computer readable storage medium having stored therein at least one instruction, at least one program, a set of codes, or a set of instructions, which is loaded and executed by a processor to implement a fingerprinting method according to any one of claims 1 to 7.
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