CN117315727A - Fingerprint identification method and device - Google Patents

Fingerprint identification method and device Download PDF

Info

Publication number
CN117315727A
CN117315727A CN202211272047.4A CN202211272047A CN117315727A CN 117315727 A CN117315727 A CN 117315727A CN 202211272047 A CN202211272047 A CN 202211272047A CN 117315727 A CN117315727 A CN 117315727A
Authority
CN
China
Prior art keywords
fingerprint
area
detection signal
fingerprint identification
dark
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211272047.4A
Other languages
Chinese (zh)
Inventor
黄敏
陈季廷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novatek Microelectronics Corp
Original Assignee
Novatek Microelectronics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Novatek Microelectronics Corp filed Critical Novatek Microelectronics Corp
Priority to TW112101225A priority Critical patent/TWI840088B/en
Priority to US18/112,119 priority patent/US11798314B1/en
Publication of CN117315727A publication Critical patent/CN117315727A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/1365—Matching; Classification

Landscapes

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

Abstract

The embodiment of the disclosure provides a fingerprint identification method, a fingerprint identification device and an electronic product. The fingerprint identification method provided by the embodiment of the disclosure comprises the following steps: acquiring a touch signal of a finger to be identified on a display component; determining a touch area of the finger to be identified based on the touch signal; determining a fingerprint identification bright area and a fingerprint identification dark area on the display component based on the touch area, wherein the fingerprint identification dark area is close to and at least partially surrounds the fingerprint identification bright area; acquiring a bright area fingerprint detection signal corresponding to a fingerprint identification bright area and a dark area fingerprint detection signal corresponding to a fingerprint identification dark area; and carrying out fingerprint identification of the finger to be identified based on the bright area fingerprint detection signal and the dark area fingerprint detection signal. By the fingerprint identification method, interference in fingerprint identification under the display screen can be effectively reduced, and accuracy of fingerprint identification under the screen is improved.

Description

Fingerprint identification method and device
Technical Field
The present disclosure relates to identification technology, and more particularly, to a fingerprint identification method, apparatus, and electronic product including the fingerprint identification apparatus.
Background
With the development of portable devices such as smartphones, there is an increasing need for personal identification. Among the personal identification technologies, fingerprint identification technologies are currently considered as one of the most promising personal identification technologies in consideration of various aspects such as equipment cost, size, identification accuracy, and the like. Fingerprint recognition technology has been widely used in a variety of electronic products, such as mobile phones, notebook computers, tablet computers, personal digital assistants (Personal Digital Assistant, PDA), and portable electronic devices, to realize identification. The user can conveniently identify through fingerprint identification, and the user can log in the electronic equipment only by placing the finger on the fingerprint identification panel or area without inputting lengthy and tedious user name and password.
As the most popular fingerprint identification technology at present, the under-screen fingerprint identification technology has the advantages of convenience in use, good integration with electronic products, small volume, wide application range and the like. The off-screen fingerprint identification technology utilizes an off-screen fingerprint sensing technology to embed a fingerprint sensor array in a display panel, so that a fingerprint sensing area is located in a display area of the display panel. At present, the accuracy requirement of the on-screen fingerprint identification on fingerprint detection signals is high, and if signal interference exists, the fingerprint identification result is easy to be incorrect, so that how to improve the accuracy of the on-screen fingerprint identification is still a popular subject of current research.
Disclosure of Invention
In order to solve the above-mentioned problems, the present disclosure provides a fingerprint identification method, including: acquiring a touch signal of a finger to be identified on a display component; determining a touch area of the finger to be identified based on the touch signal; determining a fingerprint identification bright area and a fingerprint identification dark area on the display component based on the touch area, wherein the fingerprint identification dark area is close to and at least partially surrounds the fingerprint identification bright area; acquiring a bright area fingerprint detection signal corresponding to the fingerprint identification bright area and a dark area fingerprint detection signal corresponding to the fingerprint identification dark area; and carrying out fingerprint identification of the finger to be identified based on the bright area fingerprint detection signal and the dark area fingerprint detection signal.
By the fingerprint identification method, interference in fingerprint identification under the display screen can be effectively reduced, and accuracy of fingerprint identification under the screen is improved.
According to an embodiment of the present disclosure, the fingerprint identification method further includes: and detecting the true and false fingers of the finger to be identified based on the bright area fingerprint detection signal and the dark area fingerprint detection signal.
According to the embodiment of the disclosure, fingerprint identification of the finger to be identified can be performed based on the difference value of the bright area fingerprint detection signal and the dark area fingerprint detection signal.
According to the embodiment of the disclosure, the fingerprint identification of the finger to be identified can be performed based on the difference value between the single fingerprint detection signal of the fingerprint identification bright area and the single fingerprint detection signal of the fingerprint identification dark area; alternatively, the fingerprint of the finger to be identified may be performed based on a difference between a single fingerprint detection signal of the fingerprint identification bright area and an average value of a plurality of fingerprint detection signals of the fingerprint identification dark area; alternatively, the fingerprint recognition of the finger to be recognized may be performed based on a difference between an average value of the plurality of fingerprint detection signals of the fingerprint recognition bright area and an average value of the plurality of fingerprint detection signals of the fingerprint recognition dark area, wherein the average value is an arithmetic average value or a weighted average value.
According to an embodiment of the present disclosure, the bright area fingerprint detection signal includes a first bright area fingerprint detection signal corresponding to a convex portion of a fingerprint and a second bright area fingerprint detection signal corresponding to a concave portion of the fingerprint, and the dark area fingerprint detection signal includes a first dark area fingerprint detection signal corresponding to a convex portion of the fingerprint and a second dark area fingerprint detection signal corresponding to a concave portion of the fingerprint, wherein the performing the true and false finger detection of the finger to be identified based on the bright area fingerprint detection signal and the dark area fingerprint detection signal further includes: and detecting the true and false finger of the finger to be identified based on a first difference value between the first bright area fingerprint detection signal and the second bright area fingerprint detection signal corresponding to the fingerprint identification bright area and a second difference value between the first dark area fingerprint detection signal and the second dark area fingerprint detection signal corresponding to the fingerprint identification dark area.
According to an embodiment of the present disclosure, the fingerprint identification method further includes: determining that the finger to be identified is a true finger in any of a number of cases: the first difference is greater than the second difference; the difference between the first difference and the second difference is greater than a first threshold; a ratio between the first difference and the second difference is greater than a second threshold; the ratio of the difference between the first difference and the second difference to the first difference or the second difference is greater than a third threshold.
According to an embodiment of the present disclosure, the first bright area fingerprint detection signal, the second bright area fingerprint detection signal, the first dark area fingerprint detection signal, and the second dark area fingerprint detection signal are obtained by detecting light of a specific wavelength.
According to an embodiment of the present disclosure, the fingerprint recognition bright area is a circular, oval, or rectangular area, and the fingerprint recognition dark area includes a plurality of rows or columns of display pixels adjacent to a portion of display pixels at an outermost periphery of the fingerprint recognition bright area, wherein during fingerprint recognition, the display pixels in the fingerprint recognition bright area are controlled to emit light and the display pixels in the fingerprint recognition dark area are controlled to not emit light, or during fingerprint recognition, the display pixels in the fingerprint recognition bright area are controlled to have a higher light intensity than the display pixels in the fingerprint recognition dark area.
According to an embodiment of the present disclosure, the display component includes a plurality of display sections, each display section including a plurality of display pixels, the fingerprint recognition bright area is associated with at least one of the plurality of display sections, and the fingerprint recognition dark area is associated with at least one of the plurality of display sections.
According to an embodiment of the present disclosure, the determining a fingerprint recognition bright area and a fingerprint recognition dark area on the display part based on the touch area further includes: determining a center of the touch area; the center of the touch area is taken as an origin, and the fingerprint identification bright area is determined; and taking a plurality of rows or columns of display pixels adjacent to a part of display pixels at the outermost periphery of the fingerprint identification bright region as the fingerprint identification dark region, wherein the area of the fingerprint identification bright region is a preset area or is determined according to the area of the touch region and is larger than or equal to a first area threshold.
According to an embodiment of the present disclosure, the determining a fingerprint recognition bright area and a fingerprint recognition dark area on the display part based on the touch area further includes: determining an edge region of the touch region; determining at least a portion of the edge region as the fingerprint identification dark region; and determining the fingerprint recognition bright area based on the fingerprint recognition dark area and the touch area.
According to an embodiment of the present disclosure, the fingerprint identification method further includes: determining an area of the touch area; wherein, in the case that the area of the touch area is smaller than the second area threshold, an edge area of the touch area is determined based on the touch area.
Embodiments of the present disclosure also provide a fingerprint recognition device for being disposed below a display part, including: a control circuit configured to acquire a touch signal of a finger to be identified on a display part, determine a touch area of the finger to be identified based on the touch signal, and provide a light emission control signal to the display part based on the determined touch area, the light emission control signal being used for controlling the display part to form a fingerprint identification bright area and a fingerprint identification dark area, wherein the fingerprint identification dark area is close to and at least partially surrounds the fingerprint identification bright area; the control circuit is further configured to acquire a bright area fingerprint detection signal corresponding to the fingerprint identification bright area and a dark area fingerprint detection signal corresponding to the fingerprint identification dark area, and to perform fingerprint identification of the finger to be identified based on the bright area fingerprint detection signal and the dark area fingerprint detection signal.
According to an embodiment of the present disclosure, the fingerprint recognition device further includes: an array of optical sensing units, wherein each optical sensing unit is used for receiving light reflected by a finger to be identified and converting an optical signal into an electrical signal; the bright area fingerprint detection signal is an electric signal generated by an optical sensing unit corresponding to the fingerprint identification bright area, and the dark area fingerprint detection signal is an electric signal generated by an optical sensing unit corresponding to the fingerprint identification dark area.
The embodiment of the disclosure also provides an electronic product, which realizes fingerprint identification through the fingerprint identification method.
The disclosure provides a fingerprint identification method, a fingerprint identification device and an electronic product comprising the fingerprint identification device. By the fingerprint identification method, interference in fingerprint identification under the display screen can be effectively reduced, and accuracy of fingerprint identification under the screen is improved. Meanwhile, the fingerprint identification method can realize detection of the true and false fingers only by one-time fingerprint scanning, and improves the efficiency of detection of the true and false fingers. In addition, the fingerprint identification method disclosed by the invention does not change the hardware of the electronic product too much, and has the advantages of good compatibility, small volume, wide application scene and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are used in the description of the embodiments will be briefly described below. It should be apparent that the drawings in the following description are only some exemplary embodiments of the present disclosure, and that other drawings may be obtained from these drawings by those of ordinary skill in the art without undue effort.
Here, in the drawings:
FIG. 1 is a schematic diagram illustrating a fingerprinting scenario according to an embodiment of the present disclosure;
2A-2C are schematic diagrams illustrating an electronic product according to embodiments of the present disclosure;
3A-3C are schematic diagrams illustrating fingerprint detection signal processing according to embodiments of the present disclosure;
4A-4B are schematic diagrams illustrating a light area and a dark area for fingerprint identification according to embodiments of the present disclosure;
FIG. 5 is a schematic diagram illustrating details of a fingerprint identification area according to an embodiment of the present disclosure;
6A-6B are schematic diagrams illustrating a scenario in which a fingerprint-identified bright region and a fingerprint-identified dark region are determined based on a touch region, according to an embodiment of the present disclosure;
FIG. 7 is a schematic flow chart diagram illustrating a fingerprint identification method according to an embodiment of the present disclosure; and
fig. 8 is a schematic flow chart diagram illustrating a fingerprint verification process according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present disclosure more apparent, exemplary embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present disclosure and not all of the embodiments of the present disclosure, and that the present disclosure is not limited by the example embodiments described herein.
In addition, in the present specification and the drawings, steps and elements having substantially the same or similar are denoted by the same or similar reference numerals, and repeated descriptions of the steps and elements will be omitted.
Furthermore, in the present specification and drawings, elements are described in the singular or plural form according to the embodiments. However, the singular and plural forms are properly selected for the proposed case only for convenience of explanation and are not intended to limit the present disclosure thereto. Accordingly, the singular may include the plural and the plural may include the singular unless the context clearly indicates otherwise.
Furthermore, in the present specification and the drawings, the terms "first" and "second" merely distinguish between similar objects and do not denote a particular order of objects, it being understood that the "first" and "second" may, where allowed, interchange a particular order or precedence order such that the embodiments of the disclosure described herein may be practiced otherwise than as illustrated or described herein.
Furthermore, in the present specification and the drawings, terms relating to azimuth or positional relationship such as "upper", "lower", "vertical", "horizontal", and the like are used for convenience only in describing embodiments according to the present disclosure, and are not intended to limit the present disclosure thereto. And thus should not be construed as limiting the present disclosure.
In addition, in the present description and in the drawings, unless explicitly stated otherwise, "connected" does not mean necessarily "directly connected" or "directly contacted" and, as such, "connected" may mean both fixedly and electrically connected.
The fingerprint recognition technology is one of a plurality of biological feature recognition technologies, namely, the biological feature recognition technology is to utilize the inherent physiological features or behavioral features of a human body to carry out personal identification, and the biological recognition technology has wide application prospects in the fields of identification recognition and network security due to the advantages of convenience, safety and the like of biological recognition, and the available biological feature recognition technology comprises fingerprints, faces, voiceprints, irises and the like, wherein the fingerprints are one of the most widely applied technologies. In recent years, fingerprint identification technology is applied to electronic products such as smart phones, flat plates, smart bracelets, wearable electronic equipment, intelligent access control and the like, and becomes an important basic technology for supporting unlocking and online payment of the electronic products. In the future, based on protocols such as FIDO, biological feature recognition technologies such as fingerprint recognition and the like can comprehensively replace the existing password system. With the advent and popularity of optical fingerprint acquisition technology, the rapid acquisition and verification of fingerprints in the field is facilitated. With the application of fingerprint identification technology in mobile equipment, the rapid development of small-size ultrathin fingerprint acquisition technology is promoted.
As one example, the present disclosure relates to fingerprint recognition technology, and embodiments of the present disclosure are further described below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram illustrating a fingerprint identification scenario according to an embodiment of the present disclosure.
As shown in fig. 1, in the under-screen fingerprint recognition scenario, the finger to be detected only needs to contact the display component (i.e., touch the display screen) of the electronic product, and the fingerprint detection signal can be collected and processed through the fingerprint sensors distributed below the display component or the fingerprint sensors integrated with the display component. Optionally, after detecting the touch signal of the finger to be identified, based on the touch area, a part of the area on the display component corresponding to the touch area is controlled to emit light, and then a fingerprint signal corresponding to the touch area is acquired to realize fingerprint identification.
It should be understood that the electronic product in the present disclosure may refer to an electronic device having a touch screen, such as a mobile phone, a computer, a tablet computer, and the like.
More specifically, fig. 2A is a schematic cross-sectional view illustrating an electronic product according to an embodiment of the present disclosure.
As shown in fig. 2A, the electronic product may include a display part and a fingerprint recognition device, wherein the fingerprint recognition device is disposed under the display part.
The fingerprint recognition device may include a control circuit (e.g., an Integrated Circuit (IC), etc.) for controlling a recognition process of a fingerprint, and an array of optical sensing units, each for receiving light reflected by a finger to be recognized and converting the light signal into an electrical signal.
Alternatively, the packaging of the control circuit may be implemented by using Chip On Film (COF) technology, so as to make the electronic product more miniaturized and lighter.
Optionally, the fingerprint recognition device may further comprise other components, for example, components for structural fixation, components for connection with other components of the electronic product, etc.
It should be understood that fig. 2A is only an example showing the structure of the display part and the fingerprint recognition device, and the structure of the display part and the fingerprint recognition device may be other forms.
Fig. 2B is a front view of an electronic product showing a fingerprint recognition dark space located at an edge of a display part according to an embodiment of the present disclosure. For the electronic product shown in fig. 2B, the display part, the fingerprint recognition device (including the control circuit and the optical sensing element array) may be arranged in the manner shown in fig. 2A.
For the example shown in fig. 2B, the control circuitry may be configured to: and acquiring a touch signal of the finger to be identified on the display part, determining a touch area of the finger to be identified based on the touch signal, and providing a light-emitting control signal for controlling the display part to form a fingerprint identification bright area based on the determined touch area. Furthermore, the control circuit may be further configured to: acquiring a bright area fingerprint detection signal corresponding to the fingerprint identification bright area, and carrying out fingerprint identification of the finger to be identified based on the bright area fingerprint detection signal; alternatively, the control circuit may be further configured to: and acquiring a bright area fingerprint detection signal corresponding to the fingerprint identification bright area and a dark area fingerprint detection signal corresponding to the fingerprint identification dark area positioned at the edge of the display component, and carrying out fingerprint identification of the finger to be identified based on the bright area fingerprint detection signal and the dark area fingerprint detection signal. It should be noted that, for the example shown in fig. 2B, the dark area fingerprint detection signal is only used as a reference signal when fingerprint identification is performed based on the fingerprint identification bright area, and does not itself include fingerprint information of the finger to be identified.
For the example shown in fig. 2B, each optical sensing unit in the optical sensing unit array is configured to receive light reflected by a finger to be recognized and convert the light signal into an electrical signal; the bright area fingerprint detection signal is an electric signal generated by an optical sensing unit corresponding to the fingerprint identification bright area.
As shown in fig. 2B, the fingerprint recognition dark area is located at the edge of the display part, and its position does not vary with the position of the touch area. When a touch signal of a finger to be identified is detected, the fingerprint identification device determines a touch area of the finger to be identified based on the touch signal, and determines a fingerprint identification bright area on the display part based on the touch area.
Alternatively, the display component may include multiple display sections (as shown by regions (1, 1) -region (M, N) in fig. 2B), each of which includes multiple display pixels, and the fingerprint recognition bright region may be associated with one display section (as shown by fingerprint recognition bright region 1 in fig. 2B, for example) or may be associated with multiple display sections (as shown by fingerprint recognition bright region 2 in fig. 2B, for example). In the case where the touch area is associated with one display section, the touch area in the one display section may be configured as a fingerprint recognition bright area; in the case where the touch area is associated with multiple display sections, the touch areas in the multiple display sections may be combined to constitute a fingerprint recognition bright area.
During fingerprinting, display pixels in a fingerprint-identified bright area are controlled to emit light, and display pixels in a fingerprint-identified dark area are controlled to not emit light. According to an embodiment of the present disclosure, the brightness of the fingerprint recognition bright area may be higher than the brightness when the display part displays the picture, and the brightness of the fingerprint recognition dark area may be lower than the brightness when the display part displays the picture.
Fig. 2C is a front view illustrating an electronic product in which a fingerprint recognition dark region is located around a fingerprint recognition bright region according to an embodiment of the present disclosure. For the electronic product shown in fig. 2C, the display part, the fingerprint recognition device (including the control circuit and the optical sensing element array) may be arranged in the manner shown in fig. 2A.
The electronic product shown in fig. 2C is similar to the electronic product shown in fig. 2B in construction, and is different in that, upon detection of a touch signal of a finger to be recognized, the fingerprint recognition device determines a touch area of the finger to be recognized based on the touch signal, and dynamically determines a fingerprint recognition bright area and a fingerprint recognition dark area on the display part based on the touch area, wherein the fingerprint recognition dark area is close to and at least partially surrounds the fingerprint recognition bright area. That is, in the scheme of fig. 2C, the position of the fingerprint recognition dark area is varied with the position of the touch area. The touch area covers at least a portion of the fingerprint recognition bright area and at least a portion of the fingerprint recognition dark area.
The determination of the bright and dark fingerprint areas may be done in a number of ways.
For example, the control circuit may first determine the center of the touch area; then, the center of the touch area is taken as an origin, and a fingerprint identification bright area is determined; and taking a plurality of rows or columns of display pixels adjacent to a part of the display pixels at the outermost periphery of the fingerprint recognition bright region as the fingerprint recognition dark region, wherein the area of the fingerprint recognition bright region is a preset area (for example, an average value of the contact area sizes of fingers to be recognized), or the area of the fingerprint recognition bright region is determined according to the area of the touch region and is larger than or equal to a first area threshold (for example, an average value of the contact area sizes of fingers of babies).
For another example, the control circuit may also determine an edge region of the touch region first; then determining at least a portion of the edge region as a fingerprint identification dark region; the fingerprint recognition bright area is then determined based on the fingerprint recognition dark area and the touch area. Similarly, the area of the fingerprint recognition bright area may be a preset area, or the area of the fingerprint recognition bright area may be determined according to the area of the touch area and be equal to or greater than the first area threshold.
For the example shown in fig. 2C, the control circuitry may be configured to: and acquiring a touch signal of the finger to be identified on the display component, determining a touch area of the finger to be identified based on the touch signal, and providing a luminous control signal for the display component based on the determined touch area, wherein the luminous control signal is used for controlling the display component to form a fingerprint identification bright area and a fingerprint identification dark area, and the fingerprint identification dark area is close to and at least partially surrounds the fingerprint identification bright area. Furthermore, the control circuit may be further configured to: acquiring a bright area fingerprint detection signal corresponding to the fingerprint identification bright area, and carrying out fingerprint identification of the finger to be identified based on the bright area fingerprint detection signal; alternatively, the control circuit may be further configured to: and acquiring a bright area fingerprint detection signal corresponding to the fingerprint identification bright area and a dark area fingerprint detection signal corresponding to the fingerprint identification dark area, and carrying out fingerprint identification of the finger to be identified based on the bright area fingerprint detection signal and the dark area fingerprint detection signal. It should be noted that, for the example shown in fig. 2C, the fingerprint recognition dark area is close to the fingerprint recognition bright area, and both the dark area fingerprint detection signal and the bright area fingerprint detection signal contain fingerprint information of the finger to be recognized.
During fingerprint recognition, the display pixels in the fingerprint recognition bright area are controlled to emit light and the display pixels in the fingerprint recognition dark area are controlled to not emit light, or during fingerprint recognition, the display pixels in the fingerprint recognition bright area are controlled to have higher light intensity than the display pixels in the fingerprint recognition dark area. According to an embodiment of the present disclosure, the brightness of the fingerprint recognition bright area may be higher than the brightness when the display part displays the picture, and the brightness of the fingerprint recognition dark area may be lower than the brightness when the display part displays the picture.
For the example shown in fig. 2C, each optical sensing unit in the optical sensing unit array is configured to receive light reflected by a finger to be recognized and convert the light signal into an electrical signal; the bright area fingerprint detection signal is an electric signal generated by an optical sensing unit corresponding to the fingerprint identification bright area, and the dark area fingerprint detection signal is an electric signal generated by an optical sensing unit corresponding to the fingerprint identification dark area.
Alternatively, in the case where the display section includes a plurality of display sections (as shown by the areas (1, 1) to (M, N) in fig. 2C), the fingerprint recognition bright area may be associated with one display section (as shown by the fingerprint recognition bright area 1 in fig. 2C, for example) or may be associated with a plurality of display sections (as shown by the fingerprint recognition bright area 2 in fig. 2C, for example). In the case where the touch area is associated with one display section, the touch area in the one display section may be configured as a fingerprint recognition bright area; in the case where the touch area is associated with multiple display sections, the touch areas in the multiple display sections may be combined to constitute a fingerprint recognition bright area.
Similarly, a fingerprint identification dark space may be associated with one display section (e.g., as shown by fingerprint identification dark space 1 in fig. 2C) or may be associated with multiple display sections (e.g., as shown by fingerprint identification dark space 2 in fig. 2C). In the case where the touch area is associated with one display section, an area of the one display section that is close to and at least partially surrounds the fingerprint recognition bright area may be configured as a fingerprint recognition dark area; in the case where the touch area is associated with multiple display sections, the areas of the multiple display sections that are proximate to and at least partially surrounding the fingerprint recognition bright area may be combined to form the fingerprint recognition dark area.
It should be appreciated that while in fig. 2C the fingerprint recognition dark region is drawn as completely surrounding the fingerprint recognition bright region, embodiments of the present disclosure are not limited thereto, as long as the fingerprint recognition dark region is proximate to and at least partially surrounding the fingerprint recognition bright region.
For the example of fig. 2C, since the dark area fingerprint detection signal and the bright area fingerprint detection signal both include fingerprint information of the finger to be identified, the fingerprint identification device can simultaneously acquire two different fingerprint information, and thus the fingerprint identification device in fig. 2C can also perform true and false finger detection of the finger to be identified based on the bright area fingerprint detection signal and the dark area fingerprint detection signal. Specifically, the bright area fingerprint detection signal includes a first bright area fingerprint detection signal corresponding to a convex portion of the fingerprint, and a second bright area fingerprint detection signal corresponding to a concave portion of the fingerprint; the dark region fingerprint detection signals include a first dark region fingerprint detection signal corresponding to a convex portion of the fingerprint, and a second dark region fingerprint detection signal corresponding to a concave portion of the fingerprint; the control circuit may perform the real-false finger detection of the finger to be identified based on a first difference between the first bright-area fingerprint detection signal and the second bright-area fingerprint detection signal corresponding to the fingerprint identification bright area, and a second difference between the first dark-area fingerprint detection signal and the second dark-area fingerprint detection signal corresponding to the fingerprint identification dark area.
The fingerprint identification method directly utilizes the fingerprint sensor under the display component, controls the transistor of the display component, and does not add a new module to the electronic product, so that the fingerprint identification method has the advantages of good compatibility, small volume, wide application scene and the like.
Fig. 3A is a schematic diagram illustrating a fingerprint detection signal processing procedure for the electronic product shown in fig. 2B according to an embodiment of the present disclosure.
In general, the fingerprint recognition device can directly perform fingerprint recognition of a finger to be recognized based on a bright area fingerprint detection signal. However, in this manner, the fingerprint recognition process is susceptible to noise, and the fingerprint recognition result is inaccurate.
Preferably, as shown in fig. 3A, fingerprint recognition of the finger to be recognized may be performed based on a difference between the bright area fingerprint detection signal and the dark area fingerprint detection signal.
As can be seen from fig. 3A, the magnitude of the noise may be related to the position on the display member. The difference value is made between the bright area fingerprint detection signal (the signal obtained from the bright area fingerprint sensor shown by the white square frame in fig. 3A) and the dark area fingerprint detection signal (the signal obtained from the dark area fingerprint sensor shown by the gray square frame in fig. 3A), and then the difference value is provided for an Analog Front End (AFE) and/or an analog-to-digital converter (ADC) for processing so as to further perform fingerprint identification of the finger to be identified, so that noise interference can be effectively reduced, and fingerprint identification accuracy can be improved. In general, in order to make the correlation between the bright area fingerprint detection signal and the dark area fingerprint detection signal higher, fingerprint recognition of the finger to be recognized is often performed by using a manner of making a difference between the bright area fingerprint detection signal and the dark area fingerprint detection signal of the bright area fingerprint sensor and the dark area fingerprint detection signal of the dark area fingerprint sensor located in the same row.
Fig. 3B-3C are schematic diagrams illustrating a fingerprint detection signal processing procedure for the electronic product shown in fig. 2C according to embodiments of the present disclosure.
As shown in fig. 3B, the bright area fingerprint detection signal (the signal obtained from the bright area fingerprint sensor shown by the white box in fig. 3B) and the dark area fingerprint detection signal (the signal obtained from the dark area fingerprint sensor shown by the gray box in fig. 3B) may be differentiated, and then the differences may be provided to an Analog Front End (AFE) and/or an analog-to-digital converter (ADC) for processing to further fingerprint the finger to be identified.
Since the fingerprint recognition dark area is located at the edge of the display part, the position of which does not change with the position of the touch area for the electronic product of fig. 2B, and the fingerprint recognition dark area is close to and at least partially surrounds the fingerprint recognition bright area, the position of which changes with the position of the touch area for the electronic product of fig. 2C, the correlation of the bright area fingerprint detection signal and the dark area fingerprint detection signal is higher in the scheme of fig. 2C than in the scheme of fig. 2B. Under the processing mode of fingerprint identification of the finger to be identified based on the difference value of the bright area fingerprint detection signal and the dark area fingerprint detection signal, the scheme of the figure 2C has better noise reduction effect and higher accuracy of fingerprint identification.
Alternatively, noise suppression may be associated with only portions of the bright fingerprint areas and portions of the dark fingerprint areas. For example, the bright fingerprint area and the dark fingerprint area may be divided into left and right parts, and then fingerprint identification of the finger to be identified is performed based on the difference between the bright fingerprint detection signal and the dark fingerprint detection signal (for example, as shown in fig. 3B); fingerprint recognition of the finger to be recognized is performed based on the difference between the right-side bright-area fingerprint detection signal and the right-side dark-area fingerprint detection signal (for example, as shown in fig. 3C). Similarly, the fingerprint bright area and the fingerprint dark area can be divided into an upper part and a lower part, and then the fingerprint identification of the finger to be identified is performed by utilizing the parts of the fingerprint bright area and the parts of the fingerprint dark area, and the like. The specific division method is not limited to bisection, and various division methods are possible.
Optionally, fingerprint recognition of the finger to be recognized can be performed based on a difference value between a single fingerprint detection signal of the fingerprint recognition bright area and a single fingerprint detection signal of the fingerprint recognition dark area; or, based on the difference value of the average value of a single fingerprint detection signal of the fingerprint identification bright area and a plurality of fingerprint detection signals of the fingerprint identification dark area, fingerprint identification of the finger to be identified is carried out; and performing fingerprint identification of the finger to be identified based on a difference between an average value of the plurality of fingerprint detection signals of the fingerprint identification bright area and an average value of the plurality of fingerprint detection signals of the fingerprint identification dark area. The average value here may be an arithmetic average value, a weighted average value, or the like.
It should be appreciated that in the examples of fig. 3A-3C, taking as an example and not as a limitation the fingerprint identification of the finger to be identified based on the difference between the bright area fingerprint detection signal and the dark area fingerprint detection signal, in practice the fingerprint identification of the finger to be identified may also be performed based on functions related to the bright area fingerprint detection signal and the dark area fingerprint detection signal.
In addition, the light pattern of the fingerprint recognition bright area can be various. For example, fig. 4A is a schematic diagram illustrating a fingerprint recognition bright area and a fingerprint recognition dark area in the case where the fingerprint recognition bright area is a spot of uniform light intensity according to an embodiment of the present disclosure. Fig. 4B is a schematic diagram illustrating a fingerprint recognition bright area and a fingerprint recognition dark area in the case where the fingerprint recognition bright area is a spot of non-uniform light intensity according to an embodiment of the present disclosure. In order to make the correlation between the bright area fingerprint detection signal and the dark area fingerprint detection signal higher, the fingerprint identification of the finger to be identified can be performed based on the difference value between the fingerprint detection signal of the fingerprint identification bright area and the fingerprint detection signal of the fingerprint identification dark area of the adjacent or similar fingerprint sensors.
Still further, fig. 5 is a schematic diagram illustrating details of the electronic product fingerprinting area shown in fig. 2C according to an embodiment of the present disclosure.
According to embodiments of the present disclosure, the fingerprint-identifying bright region may be a circular, oval, rectangular region, or the like, and the fingerprint-identifying dark region includes a plurality of rows or columns of display pixels adjacent to a portion of the display pixels at the outermost periphery of the fingerprint-identifying bright region. Both the bright fingerprint identification area and the dark fingerprint identification area correspond to a plurality of fingerprint sensors, and the plurality of fingerprint sensors can be distributed in an array.
In addition, the display part may include a plurality of Thin Film Transistor (TFT) pixels, and the plurality of TFT pixels and the plurality of fingerprint sensors may be staggered. For example, the plurality of TFTs and the plurality of fingerprint sensors may be located on the same plane and staggered in an array manner, respectively, or the plurality of TFTs and the plurality of fingerprint sensors may be located on two different planes up and down and staggered in an array manner.
According to embodiments of the present disclosure, the width of the fingerprint recognition dark area may also be set to be not less than 100 micrometers to reduce the influence of stray light on the measurement result of the sensor of the fingerprint recognition dark area.
Fig. 6A-6B are schematic diagrams illustrating a scenario in which a fingerprint-identified bright area and a fingerprint-identified dark area are determined based on a touch area according to an embodiment of the present disclosure.
As shown in fig. 6A, the fingerprint recognition bright area may be a circular area, and the fingerprint recognition dark area may be a ring-shaped area that is close to and surrounds the fingerprint recognition bright area. As can be seen from fig. 6A, when a finger to be recognized touches from one side of the display section, only a bright area fingerprint detection signal of a fingerprint recognition bright area and a dark area fingerprint detection signal of a fingerprint recognition dark area under the finger to be recognized actually contain useful fingerprint information. Thus, as shown in FIG. 6B, the fingerprint recognition dark area may also be an arcuate area that is proximate to and at least partially surrounds the fingerprint recognition bright area.
Specifically, according to an embodiment of the present disclosure, the process of determining a fingerprint recognition bright area and a fingerprint recognition dark area on a display part based on a touch area may be implemented by: first, determining the center of a touch area; then, the center of the touch area is taken as an origin, and a fingerprint identification bright area is determined; and then, taking a plurality of rows or columns of display pixels adjacent to a part of display pixels at the outermost periphery of the fingerprint identification bright area as a fingerprint identification dark area, wherein the area of the fingerprint identification bright area is a preset area, or the area of the fingerprint identification bright area is determined according to the area of the touch area and is larger than or equal to a first area threshold value.
According to an embodiment of the present disclosure, the process of determining a fingerprint recognition bright area and a fingerprint recognition dark area on a display part based on a touch area may also be implemented by: firstly, determining an edge area of a touch area; then, determining at least a portion of the edge area as a fingerprint identification dark area; next, a fingerprint recognition bright area is determined based on the fingerprint recognition dark area and the touch area.
According to embodiments of the present disclosure, the area of the touch area may also be determined first; then, determining an edge area of the touch area based on the touch area in the case that the area of the touch area is smaller than a second area threshold, and then determining at least a part of the edge area as a fingerprint recognition dark area; and finally, determining the fingerprint identification bright area based on the fingerprint identification dark area and the touch area.
Fig. 7 is a schematic flow chart diagram 700 illustrating a fingerprint identification method according to an embodiment of the present disclosure.
In step S701, a touch signal of a finger to be recognized on the display section is acquired.
It should be appreciated that acquisition of touch signals for a finger to be identified may be accomplished by various touch sensing techniques. For example, a touch sensor located below the display section, or a touch sensor integrated with the display section, or the like.
In step S702, a touch area of the finger to be identified is determined based on the touch signal.
Alternatively, in the case where the display section includes a plurality of display sections, the touch area of the finger to be recognized may be associated with at least one of the plurality of display sections.
In step S703, a bright fingerprint identification area and a dark fingerprint identification area on the display unit are determined based on the touch area, wherein the dark fingerprint identification area is close to and at least partially surrounds the bright fingerprint identification area.
According to an embodiment of the present disclosure, the fingerprint recognition bright region may be a circular, oval, rectangular region, or the like, corresponding to the touch region, and the fingerprint recognition dark region may include a plurality of rows or columns of display pixels adjacent to a portion of display pixels at an outermost periphery of the fingerprint recognition bright region, wherein during fingerprint recognition, the display pixels in the fingerprint recognition bright region are controlled to emit light and the display pixels in the fingerprint recognition dark region are controlled to not emit light, or during fingerprint recognition, the display pixels in the fingerprint recognition bright region are controlled to have a higher light intensity than the display pixels in the fingerprint recognition dark region.
According to an embodiment of the present disclosure, the display component may further include a plurality of display sections, each display section including a plurality of display pixels, the fingerprint recognition bright area being associated with at least one of the plurality of display sections, and the fingerprint recognition dark area being associated with at least one of the plurality of display sections.
There may be various ways of determining the bright and dark fingerprint areas on the display component based on the touch area according to embodiments of the present disclosure.
For example, the center of the touch area may be determined; then, the center of the touch area is taken as an origin, and the fingerprint identification bright area is determined; and taking a plurality of rows or columns of display pixels adjacent to a part of display pixels at the outermost periphery of the fingerprint identification bright region as the fingerprint identification dark region, wherein the area of the fingerprint identification bright region is a preset area or is determined according to the area of the touch region and is larger than or equal to a first area threshold. Wherein the touch area covers at least a portion of the fingerprint recognition bright area and at least a portion of the fingerprint recognition dark area.
Optionally, an edge region of the touch region may also be determined; then determining at least a portion of the edge region as the fingerprint identification dark region; and determining the fingerprint recognition bright area based on the fingerprint recognition dark area and the touch area. Wherein the touch area covers at least a portion of the fingerprint recognition bright area and at least a portion of the fingerprint recognition dark area.
Optionally, an area of the touch area may also be determined; and when the area of the touch area is smaller than a second area threshold value, determining an edge area of the touch area based on the touch area, and then determining at least one part of the edge area as the fingerprint identification dark area.
In step S704, a bright area fingerprint detection signal corresponding to the fingerprint identification bright area and a dark area fingerprint detection signal corresponding to the fingerprint identification dark area are acquired.
It should be understood that the sensor for acquiring the fingerprint detection signal in step S704 may be the same as or different from the touch sensing sensor in step S701. Alternatively, the fingerprint detection signal may be processed by an AFE module such as a filtering module, a signal amplifier module, or the like.
In step S705, fingerprint recognition of the finger to be recognized is performed based on the bright area fingerprint detection signal and the dark area fingerprint detection signal.
According to the embodiment of the disclosure, fingerprint identification of the finger to be identified can be performed based on the difference value of the bright area fingerprint detection signal and the dark area fingerprint detection signal, so that accuracy of on-screen fingerprint identification is improved.
Alternatively, the fingerprint identification of the finger to be identified may be performed based on a difference between the single fingerprint detection signal of the fingerprint identification bright area and the single fingerprint detection signal of the fingerprint identification dark area; alternatively, the fingerprint of the finger to be identified may be performed based on a difference between a single fingerprint detection signal of the fingerprint identification bright area and an average value of a plurality of fingerprint detection signals of the fingerprint identification dark area; or the fingerprint identification of the finger to be identified can be performed based on a difference value between an average value of a plurality of fingerprint detection signals of the fingerprint identification bright area and an average value of a plurality of fingerprint detection signals of the fingerprint identification dark area, wherein the average value can be an arithmetic average value or a weighted average value.
According to the embodiment of the disclosure, the detection of the fake finger of the finger to be identified can be performed based on the bright area fingerprint detection signal and the dark area fingerprint detection signal at the same time, so as to improve the detection efficiency of the fake finger.
Alternatively, the bright area fingerprint detection signal may include a first bright area fingerprint detection signal corresponding to a convex portion of the fingerprint and a second bright area fingerprint detection signal corresponding to a concave portion of the fingerprint, and the dark area fingerprint detection signal includes a first dark area fingerprint detection signal corresponding to a convex portion of the fingerprint and a second dark area fingerprint detection signal corresponding to a concave portion of the fingerprint. Thus, the detection of the true or false finger of the finger to be recognized can be performed based on a first difference between the first bright region fingerprint detection signal and the second bright region fingerprint detection signal corresponding to the fingerprint recognition bright region, and a second difference between the first dark region fingerprint detection signal and the second dark region fingerprint detection signal corresponding to the fingerprint recognition dark region.
Optionally, in a case where the first difference is greater than the second difference, the finger to be identified may be determined to be a true finger. Optionally, it may be further determined that the finger to be identified is a true finger if the ratio of the first difference to the second difference is greater than 1.
For example, the bright region fingerprint detection signal may include a first bright region fingerprint detection signal corresponding to a raised portion of a fingerprint And a second bright area fingerprint detection signal corresponding to a depressed portion of the fingerprint/>And the dark region fingerprint detection signal includes a first dark region fingerprint detection signal corresponding to a raised portion of a fingerprint +.>And a second dark area fingerprint detection signal corresponding to a concave portion of the fingerprint +.>At->In the above, the finger to be identified may be determined to be a true finger.
Optionally, at the first differenceDifference from said second difference-> And under the condition that the difference value between the two is larger than a first threshold value, determining that the finger to be identified is a true finger. Alternatively, in said first difference +.>Difference from said second difference-> And under the condition that the ratio of the two to be identified is larger than a second threshold value, determining that the finger to be identified is a true finger. Alternatively, in said first difference +.>Difference from said second difference-> The difference between them is the first difference +.>Or a second difference-> And if the ratio of the to-be-identified fingers is greater than the third threshold, determining that the to-be-identified fingers are true fingers.
Alternatively, the first bright area fingerprint detection signal, the second bright area fingerprint detection signal, the first dark area fingerprint detection signal, and the second dark area fingerprint detection signal may be obtained by detecting light of a specific wavelength (for example, monochromatic light such as red light, blue light, etc.). The first bright area fingerprint detection signal, the second bright area fingerprint detection signal, the first dark area fingerprint detection signal, and the second dark area fingerprint detection signal may be obtained by detecting a plurality of types of light (for example, a plurality of types of light such as white light, or light within a specific wavelength range).
In the conventional detection process of the true finger and the false finger, the detection of the true finger and the false finger is usually realized by scanning the finger to be identified multiple times by utilizing different lights or scanning the finger to be identified multiple times at different positions. In the method, the fingerprint identification bright area and the fingerprint identification dark area corresponding to the touch area are effectively utilized, so that the detection of the true and false fingers can be realized only by one-time fingerprint scanning, the detection efficiency of the true and false fingers is improved, and the user experience is improved. In addition, the fingerprint identification method can realize accurate fingerprint identification and detection of true and false fingers only by one fingerprint scanning, and effectively improves the existing fingerprint identification mode.
Fig. 8 is a schematic flow chart diagram illustrating a fingerprint verification process according to an embodiment of the present disclosure.
As shown in fig. 8, in the fingerprint verification process, the electronic product may determine a touch area of a finger to be identified through the fingerprint identification device, then determine a fingerprint identification bright area and a fingerprint identification dark area on the display component based on the touch area, and then perform fingerprint identification and true and false finger detection by using the fingerprint identification bright area and the fingerprint identification dark area.
For example, the fingerprint recognition device may perform fingerprint recognition of the finger to be recognized based on a difference value between the bright area fingerprint detection signal and the dark area fingerprint detection signal, so as to reduce interference during fingerprint recognition and improve accuracy of fingerprint recognition under the screen. Meanwhile, the fingerprint recognition device can realize the true and false finger detection of the finger to be recognized by using a first bright area fingerprint detection signal corresponding to the convex part of the fingerprint and a second bright area fingerprint detection signal corresponding to the concave part of the fingerprint, and a first dark area fingerprint detection signal corresponding to the convex part of the fingerprint and a second dark area fingerprint detection signal corresponding to the concave part of the fingerprint. The fingerprint identification and the detection of the true and false fingers can be realized by only carrying out one-time scanning on the finger to be identified, so that the fingerprint signal processing efficiency is obviously improved.
Under the condition that the finger to be identified is not a true finger, the electronic product can judge that fingerprint verification is not passed, and then operations of unlocking, logging in, fingerprint payment and the like of the electronic product by a user are prevented.
In the case of determining that the finger to be identified is a real finger, it may be further determined whether the identified fingerprint image matches a previously stored fingerprint image to verify the user identity. It should be understood that the process of determining whether the identified fingerprint image matches the previously stored fingerprint image may be directly processed by the electronic product, or the identified fingerprint image may be sent by the electronic product to a web server, then processed by the web server, and the determination result returned to the electronic product.
Then, in the case that the identified fingerprint image is not matched with the previously stored fingerprint image, the electronic product can determine that fingerprint verification is not passed, and then operations of unlocking, logging in, fingerprint payment and the like of the electronic product by the user are prevented.
In the case that it is determined that the identified fingerprint image matches the previously stored fingerprint image, the electronic product may determine that the fingerprint authentication is passed, and then allow the user to perform operations such as unlocking, login, fingerprint payment, and the like on the electronic product.
Accordingly, the present disclosure provides a fingerprint identification method, apparatus, and electronic product including the fingerprint identification apparatus.
According to an embodiment of the present disclosure, the fingerprint identification method includes: acquiring a touch signal of a finger to be identified on a display component; determining a touch area of the finger to be identified based on the touch signal; determining a fingerprint identification bright area and a fingerprint identification dark area on the display component based on the touch area, wherein the fingerprint identification dark area is close to and at least partially surrounds the fingerprint identification bright area; acquiring a bright area fingerprint detection signal corresponding to the fingerprint identification bright area and a dark area fingerprint detection signal corresponding to the fingerprint identification dark area; and carrying out fingerprint identification of the finger to be identified based on the bright area fingerprint detection signal and the dark area fingerprint detection signal.
By the fingerprint identification method, interference in fingerprint identification under the display screen can be effectively reduced, and accuracy of fingerprint identification under the screen is improved. Meanwhile, the fingerprint identification method can realize detection of the true and false fingers only by one-time fingerprint scanning, and improves the efficiency of detection of the true and false fingers. In addition, the fingerprint identification method disclosed by the invention does not change the hardware of the electronic product too much, and has the advantages of good compatibility, small volume, wide application scene and the like.
The present disclosure uses specific words to describe embodiments of the disclosure. Such as "first/second embodiment," "an embodiment," and/or "some embodiments," means a particular feature, structure, or characteristic associated with at least one embodiment of the present disclosure. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the present disclosure may be combined as suitable.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The foregoing is illustrative of the present disclosure and is not to be construed as limiting thereof. Although a few exemplary embodiments of this disclosure have been described, those skilled in the art will readily appreciate that many modifications are possible in the exemplary embodiments without materially departing from the novel teachings and advantages of this disclosure. Accordingly, all such modifications are intended to be included within the scope of this disclosure as defined in the claims. It is to be understood that the foregoing is illustrative of the present disclosure and is not to be construed as limited to the specific embodiments disclosed, and that modifications to the disclosed embodiments, as well as other embodiments, are intended to be included within the scope of the appended claims. The disclosure is defined by the claims and their equivalents.

Claims (23)

1. A fingerprint identification method, comprising:
acquiring a touch signal of a finger to be identified on a display component;
determining a touch area of the finger to be identified based on the touch signal;
determining a fingerprint identification bright area and a fingerprint identification dark area on the display component based on the touch area, wherein the fingerprint identification dark area is close to and at least partially surrounds the fingerprint identification bright area;
acquiring a bright area fingerprint detection signal corresponding to the fingerprint identification bright area and a dark area fingerprint detection signal corresponding to the fingerprint identification dark area; and
And carrying out fingerprint identification of the finger to be identified based on the bright area fingerprint detection signal and the dark area fingerprint detection signal.
2. The fingerprint identification method of claim 1, further comprising:
and detecting the true and false fingers of the finger to be identified based on the bright area fingerprint detection signal and the dark area fingerprint detection signal.
3. The fingerprint identification method according to claim 1, wherein the fingerprint identification of the finger to be identified is performed based on a difference between the bright area fingerprint detection signal and the dark area fingerprint detection signal.
4. The fingerprint recognition method according to claim 3, wherein,
based on the difference value between the single fingerprint detection signal of the fingerprint identification bright area and the single fingerprint detection signal of the fingerprint identification dark area, fingerprint identification of the finger to be identified is carried out; or,
based on the difference value between the single fingerprint detection signal of the fingerprint identification bright area and the average value of the plurality of fingerprint detection signals of the fingerprint identification dark area, fingerprint identification of the finger to be identified is carried out; or,
based on the difference between the average value of the fingerprint detection signals of the fingerprint identification bright area and the average value of the fingerprint detection signals of the fingerprint identification dark area, fingerprint identification of the finger to be identified is performed,
Wherein the average value is an arithmetic average value or a weighted average value.
5. The fingerprint recognition method according to claim 2, wherein,
the bright area fingerprint detection signal comprises a first bright area fingerprint detection signal corresponding to the convex part of the fingerprint and a second bright area fingerprint detection signal corresponding to the concave part of the fingerprint, and
the dark region fingerprint detection signal includes a first dark region fingerprint detection signal corresponding to a raised portion of the fingerprint and a second dark region fingerprint detection signal corresponding to a recessed portion of the fingerprint,
wherein, based on the bright area fingerprint detection signal and the dark area fingerprint detection signal, the detecting the true and false finger of the finger to be identified further comprises:
and detecting the true and false finger of the finger to be identified based on a first difference value between the first bright area fingerprint detection signal and the second bright area fingerprint detection signal corresponding to the fingerprint identification bright area and a second difference value between the first dark area fingerprint detection signal and the second dark area fingerprint detection signal corresponding to the fingerprint identification dark area.
6. The fingerprint identification method of claim 5, further comprising: determining that the finger to be identified is a true finger in any of a number of cases:
The first difference is greater than the second difference;
the difference between the first difference and the second difference is greater than a first threshold;
a ratio between the first difference and the second difference is greater than a second threshold;
the ratio of the difference between the first difference and the second difference to the first difference or the second difference is greater than a third threshold.
7. The fingerprint recognition method according to claim 5, wherein,
the first bright area fingerprint detection signal, the second bright area fingerprint detection signal, the first dark area fingerprint detection signal and the second dark area fingerprint detection signal are obtained by detecting light with specific wavelength.
8. The fingerprint recognition method of claim 1, wherein the fingerprint recognition bright area is a circular, oval, or rectangular area, and the fingerprint recognition dark area includes a plurality of rows or columns of display pixels adjacent to a portion of display pixels at an outermost periphery of the fingerprint recognition bright area,
wherein during fingerprint recognition, display pixels in the fingerprint recognition bright area are controlled to emit light and display pixels in the fingerprint recognition dark area are controlled to not emit light, or,
During fingerprinting, the display pixels in the fingerprinting light area are controlled to have a higher light intensity than the display pixels in the fingerprinting dark area.
9. The fingerprinting method of claim 1, wherein the display component includes a plurality of display sections, each display section including a plurality of display pixels, the fingerprinting light area being associated with at least one of the plurality of display sections, and the fingerprinting dark area being associated with at least one of the plurality of display sections.
10. The fingerprint identification method according to claim 1 or 2, wherein the determining the fingerprint identification bright area and the fingerprint identification dark area on the display part based on the touch area further comprises:
determining a center of the touch area;
the center of the touch area is taken as an origin, and the fingerprint identification bright area is determined; and
a plurality of rows or columns of display pixels adjacent to a portion of the outermost periphery of the fingerprint recognition bright region are taken as the fingerprint recognition dark region,
the area of the fingerprint identification bright area is a preset area, or the area of the fingerprint identification bright area is determined according to the area of the touch area and is larger than or equal to a first area threshold.
11. The fingerprint identification method according to claim 1 or 2, wherein the determining the fingerprint identification bright area and the fingerprint identification dark area on the display part based on the touch area further comprises:
determining an edge region of the touch region;
determining at least a portion of the edge region as the fingerprint identification dark region; and
and determining the fingerprint identification bright area based on the fingerprint identification dark area and the touch area.
12. The fingerprint identification method of claim 11, further comprising:
determining an area of the touch area;
wherein, in the case that the area of the touch area is smaller than the second area threshold, an edge area of the touch area is determined based on the touch area.
13. A fingerprint recognition device for placement under a display member, comprising:
a control circuit configured to acquire a touch signal of a finger to be identified on the display part, determine a touch area of the finger to be identified based on the touch signal, and provide a light emission control signal to the display part based on the determined touch area, the light emission control signal being used for controlling the display part to form a fingerprint identification bright area and a fingerprint identification dark area, wherein the fingerprint identification dark area is close to and at least partially surrounds the fingerprint identification bright area;
The control circuit is further configured to acquire a bright area fingerprint detection signal corresponding to the fingerprint identification bright area and a dark area fingerprint detection signal corresponding to the fingerprint identification dark area, and to perform fingerprint identification of the finger to be identified based on the bright area fingerprint detection signal and the dark area fingerprint detection signal.
14. The fingerprint recognition device of claim 13, further comprising:
an array of optical sensing units, wherein each optical sensing unit is used for receiving light reflected by a finger to be identified and converting an optical signal into an electrical signal;
the bright area fingerprint detection signal is an electric signal generated by an optical sensing unit corresponding to the fingerprint identification bright area, and the dark area fingerprint detection signal is an electric signal generated by an optical sensing unit corresponding to the fingerprint identification dark area.
15. The fingerprint recognition device according to claim 13, wherein,
the control circuit is further configured to perform a true-false finger detection of the finger to be identified based on the bright-area fingerprint detection signal and the dark-area fingerprint detection signal.
16. The fingerprint recognition device according to claim 13, wherein,
and the control circuit performs fingerprint identification of the finger to be identified based on the difference value of the bright area fingerprint detection signal and the dark area fingerprint detection signal.
17. The fingerprint recognition device of claim 16, wherein,
the control circuit performs fingerprint identification of the finger to be identified based on the difference value between the single fingerprint detection signal of the fingerprint identification bright area and the single fingerprint detection signal of the fingerprint identification dark area; or,
the control circuit performs fingerprint identification of the finger to be identified based on a difference value between a single fingerprint detection signal of the fingerprint identification bright area and an average value of a plurality of fingerprint detection signals of the fingerprint identification dark area; or,
the control circuit performs fingerprint recognition of the finger to be recognized based on a difference between an average value of a plurality of fingerprint detection signals of the fingerprint recognition bright area and an average value of a plurality of fingerprint detection signals of the fingerprint recognition dark area,
wherein the average value is an arithmetic average value or a weighted average value.
18. The fingerprint recognition device according to claim 15, wherein,
the bright area fingerprint detection signal comprises a first bright area fingerprint detection signal corresponding to the convex part of the fingerprint and a second bright area fingerprint detection signal corresponding to the concave part of the fingerprint, and
the dark region fingerprint detection signal includes a first dark region fingerprint detection signal corresponding to a raised portion of the fingerprint and a second dark region fingerprint detection signal corresponding to a recessed portion of the fingerprint,
The control circuit detects true and false fingers of the finger to be identified based on a first difference value between the first bright area fingerprint detection signal and the second bright area fingerprint detection signal corresponding to the fingerprint identification bright area and a second difference value between the first dark area fingerprint detection signal and the second dark area fingerprint detection signal corresponding to the fingerprint identification dark area.
19. The fingerprint recognition device of claim 13, wherein the fingerprint recognition bright area is a circular, oval, or rectangular area, and the fingerprint recognition dark area includes a plurality of rows or columns of display pixels adjacent to a portion of display pixels at an outermost periphery of the fingerprint recognition bright area, and,
the width of the fingerprint recognition dark area is not less than 100 micrometers,
wherein during fingerprint recognition, display pixels in the fingerprint recognition bright area are controlled to emit light and display pixels in the fingerprint recognition dark area are controlled to not emit light, or,
during fingerprinting, the display pixels in the fingerprinting light area are controlled to have a higher light intensity than the display pixels in the fingerprinting dark area.
20. The fingerprint identification device of claim 13, wherein the display component comprises a plurality of display sections, each display section comprising a plurality of pixels, the fingerprint identification bright area being associated with at least one of the plurality of display sections and the fingerprint identification dark area being associated with at least one of the plurality of display sections.
21. The fingerprint identification device of claim 13, wherein the control circuit is further configured to:
determining a center of the touch area;
the center of the touch area is taken as an origin, and the fingerprint identification bright area is determined; and
a plurality of rows or columns of display pixels adjacent to a portion of the outermost periphery of the fingerprint recognition bright region are taken as the fingerprint recognition dark region,
the area of the fingerprint identification bright area is a preset area, or the area of the fingerprint identification bright area is determined according to the area of the touch area and is larger than or equal to a first area threshold.
22. The fingerprint identification device of claim 13, wherein the control circuit is further configured to:
determining an edge region of the touch region;
determining at least a portion of the edge region as the fingerprint identification dark region; and
and determining the fingerprint identification bright area based on the fingerprint identification dark area and the touch area.
23. An electronic product which realizes fingerprint identification by the fingerprint identification method according to any one of claims 1 to 12.
CN202211272047.4A 2022-06-21 2022-10-18 Fingerprint identification method and device Pending CN117315727A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
TW112101225A TWI840088B (en) 2022-06-21 2023-01-11 Fingerprint identification method, apparatus and electronic product
US18/112,119 US11798314B1 (en) 2022-06-21 2023-02-21 Fingerprint identification method and apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202263354208P 2022-06-21 2022-06-21
US63/354,208 2022-06-21

Publications (1)

Publication Number Publication Date
CN117315727A true CN117315727A (en) 2023-12-29

Family

ID=89283603

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211272047.4A Pending CN117315727A (en) 2022-06-21 2022-10-18 Fingerprint identification method and device

Country Status (1)

Country Link
CN (1) CN117315727A (en)

Similar Documents

Publication Publication Date Title
CN109426305B (en) Method for obtaining biological characteristic information and electronic device thereof
EP3262568B1 (en) Multifunction fingerprint sensor
US10360431B2 (en) Electronic device including pin hole array mask above optical image sensor and related methods
US11239275B2 (en) Electronic device including processing circuitry for sensing images from spaced apart sub-arrays and related methods
US6950539B2 (en) Configurable multi-function touchpad device
US10885299B2 (en) Electronic device including pin hole array mask above optical image sensor and laterally adjacent light source and related methods
CN110263639B (en) Electronic equipment, method for reading fingerprint of user of electronic equipment and portable electronic equipment
CN109696192B (en) Optical biometric sensor with automatic gain and exposure control
CN105095855B (en) A kind of fingerprint recognition device, touch panel, input equipment and fingerprint identification method
US20050249386A1 (en) Pointing device having fingerprint image recognition function, fingerprint image recognition and pointing method, and method for providing portable terminal service using thereof
CN104991364B (en) A kind of array substrate and its driving method, display panel, display device
US7214953B2 (en) Multi-biometric finger sensor including optical dispersion sensing pixels and associated methods
WO2020124511A1 (en) Fingerprint recognition method, fingerprint recognition device and electronic apparatus
US20080285813A1 (en) Apparatus and recognition method for capturing ear biometric in wireless communication devices
US20090074255A1 (en) Apparatus and method for capturing skin texture biometric in electronic devices
CN108875643B (en) Fingerprint module, fingerprint identification method and device, storage medium and mobile terminal
US20100215223A1 (en) Vein Pattern Management System, Vein Pattern Registration Apparatus, Vein Pattern Authentication Apparatus, Vein Pattern Registration Method, Vein Pattern Authentication Method, Program, and Vein Data Configuration
CN106775538B (en) Electronic device and biometric method
WO2020184763A1 (en) Anti-spoofing method and system of device comprising fingerprint sensor
CN210041952U (en) Optical image acquisition device and electronic equipment
CN109446940A (en) Fingerprint identification method, electronic device and computer-readable medium
CN110110701B (en) Fingerprint identification module
CN117315727A (en) Fingerprint identification method and device
TWI840088B (en) Fingerprint identification method, apparatus and electronic product
US11798314B1 (en) Fingerprint identification method and apparatus

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination