CN109359459B - Fingerprint identification method, fingerprint identification device and display module - Google Patents
Fingerprint identification method, fingerprint identification device and display module Download PDFInfo
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- CN109359459B CN109359459B CN201811257481.9A CN201811257481A CN109359459B CN 109359459 B CN109359459 B CN 109359459B CN 201811257481 A CN201811257481 A CN 201811257481A CN 109359459 B CN109359459 B CN 109359459B
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- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
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Abstract
The invention provides a fingerprint identification method, a fingerprint identification device and a display module. The fingerprint identification method is applied to a display module, the display module comprises an array substrate and a plurality of rows and columns of fingerprint identification sensors which are arranged on the array substrate and correspond to a display area, and the fingerprint identification sensors are used for receiving optical signals; the fingerprint identification method comprises the following steps: when fingerprint identification is carried out, determining a target pixel area covered by a finger; when a finger covers the target pixel area, detecting an optical signal received by a fingerprint identification sensor corresponding to the target pixel area; correcting the optical signal to obtain a corrected optical signal; and performing fingerprint identification according to the corrected optical signal. The invention effectively improves the fingerprint identification precision and optimizes the fingerprint identification effect on the premise of not relating to complex light paths and processes.
Description
Technical Field
The invention relates to the technical field of fingerprint identification, in particular to a fingerprint identification method, a fingerprint identification device and a display module.
Background
As shown in fig. 1, the display module includes an array substrate 120, a plurality of rows and columns of fingerprint sensors 110 (only one fingerprint sensor 110 is exemplarily shown in fig. 1) disposed on a first bottom surface of the array substrate 120 corresponding to a display area, and a plurality of sub-pixels disposed on a second bottom surface of the array substrate 120, each sub-pixel including an anode, a light emitting material layer 130, and a cathode 140 sequentially arranged, the anode being disposed on the second bottom surface of the array substrate 120 (the anode is not separately shown in fig. 1), the plurality of sub-pixels sharing one cathode 140, and reference numeral 150 in fig. 1 is a cover plate.
When a finger touches the cover plate 150, light emitted from the light-emitting material layer 130 is directed to the finger, and then the light is reflected by the finger to the fingerprint identification sensor 110, the light emitted from the light-emitting material layer 130 may also be reflected by the cathode 140 to form stray light, and the stray light may also be reflected to the fingerprint identification sensor 110, the stray light has a large influence on the fingerprint identification accuracy, and the presence of the stray light may affect the fingerprint identification effect.
Disclosure of Invention
The invention mainly aims to provide a fingerprint identification method, a fingerprint identification device and a display module, and solves the problems that the existing fingerprint identification method relates to complex light path design, needs to increase the process and has higher requirements on the process.
In order to achieve the above object, the present invention provides a fingerprint identification method, which is applied to a display module, where the display module includes an array substrate and a plurality of rows and columns of fingerprint identification sensors located on the array substrate and corresponding to a display area, and the fingerprint identification sensors are used for receiving optical signals; the fingerprint identification method comprises the following steps: in the case of performing the fingerprint recognition,
determining a target pixel area covered by a finger;
when a finger covers the target pixel area, detecting an optical signal received by a fingerprint identification sensor corresponding to the target pixel area;
correcting the optical signal to obtain a corrected optical signal;
and performing fingerprint identification according to the corrected optical signal.
In practice, the step of correcting the optical signal to obtain a corrected optical signal includes: when the finger covers the target pixel area,
acquiring a pre-stored standard fingerprint image;
controlling sub-pixels in the target pixel region to emit light, detecting an optical signal received by each fingerprint identification sensor corresponding to the target pixel region, determining the optical signal as a reference optical signal, and obtaining a reference fingerprint image according to the reference optical signal;
sequentially closing all sub-pixels in the target pixel region, detecting actual optical signals received by each fingerprint identification sensor corresponding to the target pixel region when each sub-pixel in the target pixel region is closed, and obtaining an actual fingerprint image according to the actual optical signals; when the actual fingerprint image is closer to the standard fingerprint image than the reference fingerprint image, controlling the sub-pixel to emit light, and when the actual fingerprint image is not closer to the standard fingerprint image than the reference fingerprint image, controlling the sub-pixel to keep a closed state during the current fingerprint identification;
and detecting an optical signal received by the fingerprint identification sensor corresponding to the target pixel area, and determining the optical signal as a corrected optical signal.
In practice, the step of correcting the optical signal to obtain a corrected optical signal includes:
acquiring a basic optical signal received by a fingerprint identification sensor corresponding to the target pixel area;
when a finger covers the target pixel area, controlling preset color sub-pixels in the target pixel area to emit light, controlling other color sub-pixels in the target pixel area to be closed, and detecting an actual optical signal received by a fingerprint identification sensor corresponding to the target pixel area;
and obtaining the corrected optical signal according to the actual optical signal and the basic optical signal.
In implementation, before the step of acquiring the basic optical signal received by the fingerprint sensor corresponding to the target pixel area, the step of correcting the optical signal to obtain a corrected optical signal further includes:
when the finger does not cover the target pixel area, controlling the preset color sub-pixels in the target pixel area to emit light, controlling other color sub-pixels in the target pixel area to be closed, detecting an optical signal received by the fingerprint identification sensor corresponding to the target pixel area, and determining the optical signal as the basic optical signal.
In practice, the step of obtaining the modified optical signal according to the actual optical signal and the basic optical signal includes:
determining that the intensity of the modified optical signal is equal to the difference between the intensity of the actual optical signal and the intensity of the base optical signal.
The invention also provides a fingerprint identification device, which is applied to a display module, wherein the display module comprises an array substrate and a plurality of rows and columns of fingerprint identification sensors which are arranged on the array substrate and correspond to the display area, and the fingerprint identification sensors are used for receiving optical signals; the fingerprint identification device comprises:
a target pixel area determination unit for determining a target pixel area covered by a finger when fingerprint recognition is performed;
the detection unit is used for detecting an optical signal received by a fingerprint identification sensor corresponding to the target pixel area when the finger covers the target pixel area;
the correction unit is used for correcting the optical signal to obtain a corrected optical signal; and the number of the first and second groups,
and the fingerprint identification unit is used for carrying out fingerprint identification according to the corrected optical signal.
In practice, the correction unit comprises:
the acquisition module is used for acquiring a pre-stored standard fingerprint image;
the reference fingerprint image obtaining module is used for controlling sub-pixels in the target pixel area to emit light when the finger covers the target pixel area, detecting an optical signal received by each fingerprint identification sensor corresponding to the target pixel area, determining the optical signal as a reference optical signal, and obtaining a reference fingerprint image according to the reference optical signal;
the correction module is used for sequentially closing all sub-pixels in the target pixel area after the reference fingerprint image is obtained by the reference fingerprint image obtaining module when the finger covers the target pixel area, detecting actual optical signals received by each fingerprint identification sensor corresponding to the target pixel area when each sub-pixel in the target pixel area is closed, and obtaining an actual fingerprint image according to the actual optical signals; when the actual fingerprint image is closer to the standard fingerprint image than the reference fingerprint image, controlling the sub-pixel to emit light, and when the actual fingerprint image is not closer to the standard fingerprint image than the reference fingerprint image, controlling the sub-pixel to keep a closed state during the current fingerprint identification; and the number of the first and second groups,
and the determining module is used for detecting an optical signal received by the fingerprint identification sensor corresponding to the target pixel area after all the sub-pixels in the target pixel area are sequentially closed by the correcting module when the finger covers the target pixel area, and determining the optical signal as a corrected optical signal.
In practice, the correction unit comprises:
the basic optical signal acquisition module is used for acquiring a basic optical signal received by a fingerprint identification sensor corresponding to the target pixel area;
the actual optical signal detection module is used for controlling the preset color sub-pixels in the target pixel area to emit light, controlling other color sub-pixels in the target pixel area to be closed and detecting the actual optical signal received by the fingerprint identification sensor corresponding to the target pixel area when the finger covers the target pixel area; and the number of the first and second groups,
and the optical signal correction module is used for obtaining the corrected optical signal according to the actual optical signal and the basic optical signal.
In practice, the fingerprint identification device of the present invention further comprises:
and the basic optical signal determining unit is used for controlling the preset color sub-pixels in the target pixel area to emit light, controlling other color sub-pixels in the target pixel area to be closed, detecting an optical signal received by the fingerprint identification sensor corresponding to the target pixel area, and determining the optical signal as the basic optical signal when the finger does not cover the target pixel area.
In practice, the optical signal modification module is configured to determine that the intensity of the modified optical signal is equal to a difference between the intensity of the actual optical signal and the intensity of the base optical signal.
The invention also provides a display module comprising the fingerprint identification device.
Compared with the prior art, the fingerprint identification method, the fingerprint identification device and the display module correct the optical signals received by the corresponding fingerprint identification sensor when the finger covers the target pixel area, so that the influence of stray light on the fingerprint identification precision is reduced, the fingerprint identification precision is effectively improved and the fingerprint identification effect is optimized on the premise of not involving complex light paths and processes.
Drawings
FIG. 1 is a schematic structural diagram of a conventional display module;
FIG. 2 is a flow chart of a fingerprint identification method according to an embodiment of the present invention;
FIG. 3 is a flow chart of a fingerprint recognition method according to another embodiment of the present invention;
FIG. 4 is a flowchart of a fingerprint recognition method according to another embodiment of the present invention;
fig. 5 is a block diagram of a fingerprint identification device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The fingerprint identification method is applied to a display module, the display module comprises an array substrate and a plurality of rows and columns of fingerprint identification sensors which are arranged on the array substrate and correspond to a display area, and the fingerprint identification sensors are used for receiving optical signals; as shown in fig. 2, the fingerprint identification method includes: in the case of performing the fingerprint recognition,
s1: determining a target pixel area covered by a finger;
s2: when a finger covers the target pixel area, detecting an optical signal received by a fingerprint identification sensor corresponding to the target pixel area;
s3: correcting the optical signal to obtain a corrected optical signal;
s4: and performing fingerprint identification according to the corrected optical signal.
The fingerprint identification method provided by the embodiment of the invention corrects the optical signal received by the corresponding fingerprint identification sensor when the finger covers the target pixel area, so as to reduce the influence of stray light on the fingerprint identification precision, effectively improve the fingerprint identification precision and optimize the fingerprint identification effect on the premise of not involving complex light paths and processes.
In specific implementation, the target pixel area is included in the display area, and when a finger touches any one of the pixel areas included in the display area, fingerprint identification can be performed.
According to an embodiment, as shown in fig. 3, the step S3 of modifying the optical signal to obtain a modified optical signal may include: when the finger covers the target pixel area,
s31: acquiring a pre-stored standard fingerprint image;
s32: controlling sub-pixels in the target pixel region to emit light, detecting an optical signal received by each fingerprint identification sensor corresponding to the target pixel region, determining the optical signal as a reference optical signal, and obtaining a reference fingerprint image according to the reference optical signal;
s33: sequentially closing all sub-pixels in the target pixel region, detecting actual optical signals received by each fingerprint identification sensor corresponding to the target pixel region when each sub-pixel in the target pixel region is closed, and obtaining an actual fingerprint image according to the actual optical signals; when the actual fingerprint image is closer to the standard fingerprint image than the reference fingerprint image, controlling the sub-pixel to emit light, and when the actual fingerprint image is not closer to the standard fingerprint image than the reference fingerprint image, controlling the sub-pixel to keep a closed state during the current fingerprint identification;
s34: and detecting an optical signal received by the fingerprint identification sensor corresponding to the target pixel area, and determining the optical signal as a corrected optical signal.
During fingerprint identification, a finger covers a target pixel region, a fingerprint identification sensor receives an optical signal, sub-pixels in the target pixel region are sequentially closed, when one sub-pixel is closed (namely the sub-pixel is controlled not to emit light), a fingerprint identification effect is checked, if the fingerprint identification effect is enhanced, the sub-pixel is confirmed to be closed, and then the next sub-pixel is closed; if the fingerprint identification effect is not enhanced, controlling the sub-pixel to emit light, closing the next sub-pixel, and performing effect verification until the sub-pixels in the target pixel region are checked, and closing the sub-pixels with larger influence on the generated stray light by the method, thereby achieving the purpose of improving the fingerprint identification effect.
In actual operation, when the finger covers the target pixel region, the luminance of all the sub-pixels in the target pixel region may be controlled to be the same when emitting light (that is, the data voltages provided to all the sub-pixels in the target pixel region are equal), or the luminance of each sub-pixel in the target pixel region may be controlled to be different, and the luminance of each sub-pixel in the target pixel region may be selected according to actual conditions.
If a sub-pixel in the target pixel region emits light, large stray light is generated, and when the sub-pixel is closed, namely the actual fingerprint image is closer to the standard fingerprint image than the reference fingerprint image, the fingerprint identification effect is enhanced; if stray light generated by a sub-pixel in the target pixel region is smaller or no stray light is generated when the sub-pixel is turned off, the actual fingerprint image is not closer to the standard fingerprint image than the reference fingerprint image, so that the fingerprint identification effect is not enhanced.
In actual operation, whether the actual fingerprint image is closer to the standard fingerprint image than the reference fingerprint image or not can be visually judged by comparing the actual fingerprint image, the reference fingerprint image and the standard fingerprint image, and can also be judged according to the following method:
acquiring a standard optical signal received by each fingerprint identification sensor corresponding to the standard fingerprint image, and acquiring the intensity of the standard optical signal;
obtaining the intensity of the reference light signal received by each fingerprint identification sensor;
obtaining the intensity of the actual light signal received by each fingerprint identification sensor;
comparing the intensity of the standard optical signal, the intensity of the reference optical signal and the intensity of the actual optical signal to obtain the following comparison result:
for M of the fingerprint identification sensors, the intensity of the reference light signal is closer to that of the standard light signal than that of the actual light signal, or the intensity of the reference light signal is equal to that of the actual light signal;
for N fingerprint identification sensors, the intensity of the actual optical signal is closer to that of the standard optical signal than that of the reference optical signal;
n is equal to 0 or N is a positive integer, M is equal to 0 or M is a positive integer;
if M is larger than or equal to N, the fingerprint identification effect is judged not to be enhanced, and if M is smaller than N, the fingerprint effect is judged to be enhanced. According to another specific embodiment, as shown in fig. 4, the step S3 of correcting the optical signal to obtain a corrected optical signal may include:
s41: acquiring a basic optical signal received by a fingerprint identification sensor corresponding to the target pixel area;
s42: when a finger covers the target pixel area, controlling preset color sub-pixels in the target pixel area to emit light, controlling other color sub-pixels in the target pixel area to be closed, and detecting an actual optical signal received by a fingerprint identification sensor corresponding to the target pixel area;
s43: and obtaining the corrected optical signal according to the actual optical signal and the basic optical signal.
When fingerprint identification is performed, when a finger covers the target pixel region, the sub-pixels with the predetermined color in the target pixel region may be controlled to emit light (that is, the sub-pixels in the target pixel region only emit a certain light, which may be a light with a single color, for example, the certain light may be red light, green light, blue light, or white light), and an actual light signal received by the fingerprint identification sensor corresponding to the target pixel region is detected, and the basic light signal is removed from the actual light signal to obtain the corrected light signal, so that the accuracy of fingerprint identification is improved.
Specifically, before the step of obtaining the basic optical signal received by the fingerprint identification sensor corresponding to the target pixel area, the step of correcting the basic optical signal and the optical signal to obtain a corrected optical signal further includes:
when the finger does not cover the target pixel area, controlling the preset color sub-pixels in the target pixel area to emit light, controlling other color sub-pixels in the target pixel area to be closed, detecting an optical signal received by the fingerprint identification sensor corresponding to the target pixel area, and determining the optical signal as the basic optical signal.
In a specific implementation, the base light signal may be a light signal received by a fingerprint identification sensor corresponding to the target pixel region, which is detected when a predetermined color sub-pixel in the target pixel region emits light when the finger does not cover the target pixel region.
In actual operation, when determining the base light signal, the luminance of the light signal emitted by the predetermined color sub-pixel is the same as the luminance of the light signal emitted by the predetermined color sub-pixel in step S42.
Specifically, the step of obtaining the modified optical signal according to the actual optical signal and the basic optical signal may include:
determining that the intensity of the modified optical signal is equal to the difference between the intensity of the actual optical signal and the intensity of the base optical signal.
The fingerprint identification method provided by the embodiment of the invention reduces the influence of stray light on fingerprint identification by setting different algorithms, and effectively optimizes the fingerprint identification effect on the premise of not involving complex light paths and processes.
The fingerprint identification device is applied to a display module, the display module comprises an array substrate and a plurality of rows and columns of fingerprint identification sensors which are arranged on the array substrate and correspond to a display area, and the fingerprint identification sensors are used for receiving optical signals; as shown in fig. 5, the fingerprint recognition device includes:
a target pixel area determination unit 51 for determining a target pixel area covered by a finger at the time of fingerprint recognition;
a detection unit 52 connected to the target pixel area determination unit 51, for detecting an optical signal received by the fingerprint recognition sensor corresponding to the target pixel area when the finger covers the target pixel area;
a correcting unit 53, connected to the detecting unit 52, for correcting the optical signal to obtain a corrected optical signal; and the number of the first and second groups,
and a fingerprint recognition unit 54 connected to the correction unit 53, for performing fingerprint recognition according to the corrected optical signal.
The fingerprint identification device provided by the embodiment of the invention corrects the optical signal received by the corresponding fingerprint identification sensor when the finger covers the target pixel area, so that the influence of stray light on the fingerprint identification precision is reduced, the fingerprint identification precision is effectively improved and the fingerprint identification effect is optimized on the premise of not involving complex light paths and processes.
According to a specific embodiment, the correction unit may include:
the acquisition module is used for acquiring a pre-stored standard fingerprint image;
the reference fingerprint image obtaining module is used for controlling sub-pixels in the target pixel area to emit light when the finger covers the target pixel area, detecting an optical signal received by each fingerprint identification sensor corresponding to the target pixel area, confirming that the optical signal is a reference optical signal, and obtaining a reference fingerprint image according to the reference optical signal;
the correction module is used for sequentially closing all sub-pixels in the target pixel area after the reference fingerprint image is obtained by the reference fingerprint image obtaining module when the finger covers the target pixel area, detecting actual optical signals received by each fingerprint identification sensor corresponding to the target pixel area when each sub-pixel in the target pixel area is closed, and obtaining an actual fingerprint image according to the actual optical signals; when the actual fingerprint image is closer to the standard fingerprint image than the reference fingerprint image, controlling the sub-pixel to emit light, and when the actual fingerprint image is not closer to the standard fingerprint image than the reference fingerprint image, controlling the sub-pixel to keep a closed state during the current fingerprint identification; and the number of the first and second groups,
and the determining module is used for detecting an optical signal received by the fingerprint identification sensor corresponding to the target pixel area after all the sub-pixels in the target pixel area are sequentially closed by the correcting module when the finger covers the target pixel area, and determining the optical signal as a corrected optical signal.
During fingerprint identification, a finger covers a target pixel region, a fingerprint identification sensor receives an optical signal, sub-pixels in the target pixel region are sequentially closed, when one sub-pixel is closed (namely the sub-pixel is controlled not to emit light), a fingerprint identification effect is checked, if the fingerprint identification effect is enhanced, the sub-pixel is confirmed to be closed, and then the next sub-pixel is closed; if the fingerprint identification effect is not enhanced, controlling the sub-pixel to emit light, closing the next sub-pixel, and performing effect verification until the sub-pixels in the target pixel region are checked, and closing the sub-pixels with larger influence on the generated stray light by the method, thereby achieving the purpose of improving the fingerprint identification effect.
According to another specific embodiment, the correction unit may include:
the basic optical signal acquisition module is used for acquiring a basic optical signal received by a fingerprint identification sensor corresponding to the target pixel area;
the actual optical signal detection module is used for controlling the preset color sub-pixels in the target pixel area to emit light, controlling other color sub-pixels in the target pixel area to be closed and detecting the actual optical signal received by the fingerprint identification sensor corresponding to the target pixel area when the finger covers the target pixel area; and the number of the first and second groups,
and the optical signal correction module is used for obtaining the corrected optical signal according to the actual optical signal and the basic optical signal.
When fingerprint identification is performed, when a finger covers the target pixel region, the sub-pixels with the predetermined color in the target pixel region may be controlled to emit light (that is, the sub-pixels in the target pixel region only emit a certain light, which may be a light with a single color, for example, the certain light may be red light, green light, blue light, or white light), and an actual light signal received by the fingerprint identification sensor corresponding to the target pixel region is detected, and the basic light signal is removed from the actual light signal to obtain the corrected light signal, so that the accuracy of fingerprint identification is improved.
Specifically, the fingerprint identification apparatus according to the embodiment of the present invention may further include:
and the basic optical signal determining unit is used for controlling the preset color sub-pixels in the target pixel area to emit light, controlling other color sub-pixels in the target pixel area to be closed, detecting an optical signal received by the fingerprint identification sensor corresponding to the target pixel area, and determining the optical signal as the basic optical signal when the finger does not cover the target pixel area.
Specifically, the optical signal modification module is configured to determine that the intensity of the modified optical signal is equal to a difference between the intensity of the actual optical signal and the intensity of the base optical signal.
The display module in the embodiment of the invention comprises the fingerprint identification device.
The display module provided by the embodiment of the invention can be any product or component with a display function, such as a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. A fingerprint identification method is applied to a display module, the display module comprises an array substrate and a plurality of rows and columns of fingerprint identification sensors which are arranged on the array substrate and correspond to a display area, and the fingerprint identification sensors are used for receiving optical signals; the fingerprint identification method is characterized by comprising the following steps: in the case of performing the fingerprint recognition,
determining a target pixel area covered by a finger;
when a finger covers the target pixel area, detecting an optical signal received by a fingerprint identification sensor corresponding to the target pixel area;
correcting the optical signal to obtain a corrected optical signal;
fingerprint identification is carried out according to the corrected optical signal;
the step of correcting the optical signal to obtain a corrected optical signal includes: when the finger covers the target pixel area,
acquiring a pre-stored standard fingerprint image;
controlling sub-pixels in the target pixel region to emit light, detecting an optical signal received by each fingerprint identification sensor corresponding to the target pixel region, determining the optical signal as a reference optical signal, and obtaining a reference fingerprint image according to the reference optical signal;
sequentially closing all sub-pixels in the target pixel region, detecting actual optical signals received by each fingerprint identification sensor corresponding to the target pixel region when each sub-pixel in the target pixel region is closed, and obtaining an actual fingerprint image according to the actual optical signals; when the actual fingerprint image is closer to the standard fingerprint image than the reference fingerprint image, controlling the sub-pixel to emit light, and when the actual fingerprint image is not closer to the standard fingerprint image than the reference fingerprint image, controlling the sub-pixel to keep a closed state during the current fingerprint identification;
detecting an optical signal received by a fingerprint identification sensor corresponding to the target pixel area, and determining the optical signal as a corrected optical signal;
or,
the step of correcting the optical signal to obtain a corrected optical signal includes:
acquiring a basic optical signal received by a fingerprint identification sensor corresponding to the target pixel area;
when a finger covers the target pixel area, controlling preset color sub-pixels in the target pixel area to emit light, controlling other color sub-pixels in the target pixel area to be closed, and detecting an actual optical signal received by a fingerprint identification sensor corresponding to the target pixel area;
and obtaining the corrected optical signal according to the actual optical signal and the basic optical signal.
2. The fingerprint identification method of claim 1, wherein the step of modifying the optical signal to obtain a modified optical signal comprises: acquiring a basic optical signal received by a fingerprint identification sensor corresponding to the target pixel area; when a finger covers the target pixel area, controlling preset color sub-pixels in the target pixel area to emit light, controlling other color sub-pixels in the target pixel area to be closed, and detecting an actual optical signal received by a fingerprint identification sensor corresponding to the target pixel area; obtaining the corrected optical signal according to the actual optical signal and the basic optical signal;
before the step of obtaining the basic optical signal received by the fingerprint identification sensor corresponding to the target pixel area, the step of correcting the basic optical signal to obtain a corrected optical signal further includes:
when the finger does not cover the target pixel area, controlling the preset color sub-pixels in the target pixel area to emit light, controlling other color sub-pixels in the target pixel area to be closed, detecting an optical signal received by the fingerprint identification sensor corresponding to the target pixel area, and determining the optical signal as the basic optical signal.
3. The fingerprint identification method of claim 1, wherein the step of modifying the optical signal to obtain a modified optical signal comprises: acquiring a basic optical signal received by a fingerprint identification sensor corresponding to the target pixel area; when a finger covers the target pixel area, controlling preset color sub-pixels in the target pixel area to emit light, controlling other color sub-pixels in the target pixel area to be closed, and detecting an actual optical signal received by a fingerprint identification sensor corresponding to the target pixel area; obtaining the corrected optical signal according to the actual optical signal and the basic optical signal;
the step of obtaining the corrected optical signal according to the actual optical signal and the basic optical signal includes:
determining that the intensity of the modified optical signal is equal to the difference between the intensity of the actual optical signal and the intensity of the base optical signal.
4. A fingerprint identification device is applied to a display module, the display module comprises an array substrate and a plurality of rows and columns of fingerprint identification sensors which are arranged on the array substrate and correspond to a display area, and the fingerprint identification sensors are used for receiving optical signals; characterized in that the fingerprint recognition device comprises:
a target pixel area determination unit for determining a target pixel area covered by a finger when fingerprint recognition is performed;
the detection unit is used for detecting an optical signal received by a fingerprint identification sensor corresponding to the target pixel area when the finger covers the target pixel area;
the correction unit is used for correcting the optical signal to obtain a corrected optical signal; and the number of the first and second groups,
the fingerprint identification unit is used for carrying out fingerprint identification according to the corrected optical signal;
the correction unit includes:
the acquisition module is used for acquiring a pre-stored standard fingerprint image;
the reference fingerprint image obtaining module is used for controlling sub-pixels in the target pixel area to emit light when the finger covers the target pixel area, detecting an optical signal received by each fingerprint identification sensor corresponding to the target pixel area, determining the optical signal as a reference optical signal, and obtaining a reference fingerprint image according to the reference optical signal;
the correction module is used for sequentially closing all sub-pixels in the target pixel area after the reference fingerprint image is obtained by the reference fingerprint image obtaining module when the finger covers the target pixel area, detecting actual optical signals received by each fingerprint identification sensor corresponding to the target pixel area when each sub-pixel in the target pixel area is closed, and obtaining an actual fingerprint image according to the actual optical signals; when the actual fingerprint image is closer to the standard fingerprint image than the reference fingerprint image, controlling the sub-pixel to emit light, and when the actual fingerprint image is not closer to the standard fingerprint image than the reference fingerprint image, controlling the sub-pixel to keep a closed state during the current fingerprint identification; and the number of the first and second groups,
the determining module is used for detecting an optical signal received by a fingerprint identification sensor corresponding to the target pixel area after all sub-pixels in the target pixel area are sequentially closed by the correcting module when the finger covers the target pixel area, and determining the optical signal as a corrected optical signal;
or,
the correction unit includes:
the basic optical signal acquisition module is used for acquiring a basic optical signal received by a fingerprint identification sensor corresponding to the target pixel area;
the actual optical signal detection module is used for controlling the preset color sub-pixels in the target pixel area to emit light, controlling other color sub-pixels in the target pixel area to be closed and detecting the actual optical signal received by the fingerprint identification sensor corresponding to the target pixel area when the finger covers the target pixel area; and the number of the first and second groups,
and the optical signal correction module is used for obtaining the corrected optical signal according to the actual optical signal and the basic optical signal.
5. The fingerprint recognition apparatus according to claim 4, wherein when said modification unit includes a base optical signal acquisition module, an actual optical signal detection module, and an optical signal modification module, said fingerprint recognition apparatus further comprises:
and the basic optical signal determining unit is used for controlling the preset color sub-pixels in the target pixel area to emit light, controlling other color sub-pixels in the target pixel area to be closed, detecting an optical signal received by the fingerprint identification sensor corresponding to the target pixel area, and determining the optical signal as the basic optical signal when the finger does not cover the target pixel area.
6. The fingerprint recognition device of claim 4, wherein when the modification unit comprises a base optical signal acquisition module, an actual optical signal detection module, and an optical signal modification module, the optical signal modification module is configured to determine that the intensity of the modified optical signal is equal to a difference between the intensity of the actual optical signal and the intensity of the base optical signal.
7. A display module comprising the fingerprint recognition device of any one of claims 4 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811257481.9A CN109359459B (en) | 2018-10-26 | 2018-10-26 | Fingerprint identification method, fingerprint identification device and display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811257481.9A CN109359459B (en) | 2018-10-26 | 2018-10-26 | Fingerprint identification method, fingerprint identification device and display module |
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| CN110278299B (en) * | 2019-06-24 | 2021-10-19 | Oppo广东移动通信有限公司 | Display device, electronic apparatus, and image acquisition method |
| CN110286717B (en) * | 2019-06-24 | 2021-07-02 | Oppo广东移动通信有限公司 | Display device, electronic apparatus, and image acquisition method |
| CN110286716B (en) * | 2019-06-24 | 2021-03-19 | Oppo广东移动通信有限公司 | Display device, electronic apparatus, and image acquisition method |
| CN110427910B (en) * | 2019-08-09 | 2022-04-05 | Oppo广东移动通信有限公司 | Electronic device and control method of electronic device |
| TWI793448B (en) * | 2020-01-21 | 2023-02-21 | 神盾股份有限公司 | Electronic device and operating method thereof |
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