Fingerprint identification method and fingerprint identification device

Abstract

The invention provides a fingerprint identification method and fingerprint identification equipment, the method is applied to the fingerprint identification equipment, the fingerprint identification equipment comprises a fingerprint light sensor and a touch screen, the touch screen comprises a fingerprint identification area, and the method comprises the following steps: obtaining a touch detection result through the touch screen; the touch detection result comprises that a finger is detected to carry out touch operation on the fingerprint identification area or the finger is not detected to carry out touch operation on the fingerprint identification area; when the touch detection result is that no finger is detected to perform the touch operation on the fingerprint identification area, performing light sensation detection through a fingerprint light sensation sensor; and under the condition that the touch detection result is that the finger performs the touch operation on the fingerprint identification area, performing fingerprint detection through a fingerprint light sensor, and obtaining a first fingerprint image corresponding to the finger based on the detection result of the fingerprint detection.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment, and in particular to a fingerprint recognition method and a fingerprint recognition device. Background Art

[0002] Light sensing is an indispensable part of smart electronic devices such as smartphones. In the prior art, both the optical fingerprint module and the light sensing module are designed separately, that is, the two are independent devices. The fingerprint recognition and light sensing detection are realized by the sensors corresponding to each module converting the amount of light from the outside into electrical signals, and then the processor of the electronic device performs corresponding processing based on the electrical signals to realize the corresponding operation.

[0003] However, since the optical fingerprint module and the light sensing module adopt a split design, two independent devices need to be stacked, resulting in low space utilization and high cost of the whole machine. Summary of the invention

[0004] The present invention provides a fingerprint recognition method and a fingerprint recognition device, which are used to solve the defects of low space utilization rate and high cost of the whole machine in the prior art, improve the space utilization rate of the whole machine, and reduce the equipment cost.

[0005] In a first aspect, the present invention provides a fingerprint recognition method, which is applied to a fingerprint recognition device, wherein the fingerprint recognition device includes a fingerprint light sensor and a touch screen, wherein the touch screen includes a fingerprint recognition area, and the method includes the following steps: Acquiring a touch detection result through the touch screen; the touch detection result includes detecting that a finger is performing a touch operation on the fingerprint recognition area or not detecting that a finger is performing a touch operation on the fingerprint recognition area; When the touch detection result is that no finger is detected to perform a touch operation on the fingerprint recognition area, light sensing detection is performed by the fingerprint light sensing sensor; or, When the touch detection result is that a finger is detected to perform a touch operation on the fingerprint recognition area, fingerprint detection is performed by the fingerprint light sensor, and a first fingerprint image corresponding to the finger is obtained based on the detection result of the fingerprint detection.

[0006] In some embodiments, the fingerprint recognition device further includes a display screen, and the fingerprint light sensor includes a pixel array; and the fingerprint detection by the fingerprint light sensor includes: The pixel array is used to sense the reflected light signal to obtain the detection result of the fingerprint detection; the reflected light signal is a light signal emitted by the display screen and reflected on each pixel in the pixel array after reaching the finger.

[0007] In some embodiments, the performing light sensing detection by the fingerprint light sensing sensor includes: Using the pixel array to sense the intensity of the external ambient light signal to obtain the detection result of the light sensing detection; The method further comprises: The screen brightness of the display screen is adjusted according to the detection result of the light sensing.

[0008] In some embodiments, the fingerprint recognition device further includes a pressure sensor, and the pressure sensor is disposed on the touch screen, and the touch screen is a capacitive touch screen; the method further includes: Determine the first finger pressing force according to the finger pressing pressure signal, and determine the position of the first finger touch point and the first finger pressing area according to the capacitance change; the finger pressing pressure signal is detected by the pressure sensor, and the capacitance change is formed by the capacitive touch screen when the finger contacts the screen of the capacitive touch screen; Determine a reference fingerprint image template according to the first finger pressing force, the position of the first finger touch point and the first finger pressing area, wherein the fingerprint recognition device is preset with a plurality of fingerprint image templates corresponding to different second finger pressing force, second finger touch point positions and second finger pressing areas; The first fingerprint image corresponding to the finger is matched with the fingerprint image features of the reference fingerprint image template.

[0009] In a second aspect, the present invention further provides a fingerprint recognition device, the fingerprint recognition device comprising a touch screen, a fingerprint light sensor and a processor, the touch screen comprising a fingerprint recognition area; wherein, The touch screen is used to generate a sensing signal in response to finger contact; The processor is configured to: Acquire a touch detection result according to the sensing signal of the touch screen; the touch detection result includes detecting that a finger performs a touch operation on the fingerprint recognition area or not detecting that a finger performs a touch operation on the fingerprint recognition area; When the detection result is that no finger is detected to perform a touch operation on the fingerprint recognition area, light sensing detection is performed by the fingerprint light sensing sensor; or, When the detection result is that a finger is detected to perform a touch operation on the fingerprint recognition area, fingerprint detection is performed by the fingerprint light sensor, and a first fingerprint image corresponding to the finger is obtained based on the detection result of the fingerprint detection.

[0010] In some embodiments, the fingerprint recognition device further includes a display screen, and the fingerprint light sensor includes a pixel array; the fingerprint light sensor is specifically used for: The pixel array is used to sense reflected light signals; the reflected light signals are light signals emitted by the display screen and reflected on each pixel in the pixel array after reaching the finger; The processor is specifically used for: The detection result of the fingerprint detection is obtained according to the intensity of the reflected light signal sensed by each pixel in the pixel array.

[0011] In some embodiments, the fingerprint recognition device further includes an optical lens, which is a lens disposed between the display screen and the fingerprint sensor, and is used to: focus the light signal reflected from the finger; The fingerprint optical sensor is specifically used for: The pixels in the pixel array are used to sense the light signal focused by the optical lens.

[0012] In some embodiments, the fingerprint recognition device further includes a display screen, and the fingerprint light sensor includes a pixel array; the fingerprint light sensor is specifically used for: Using the pixel array to sense the intensity of the external ambient light signal, the overall light sensitivity intensity of the fingerprint light sensor is calculated; The processor is specifically used for: The light sensing detection result is determined according to the overall light sensing intensity of the fingerprint light sensing sensor.

[0013] In some embodiments, the fingerprint recognition device further includes a pressure sensor, and the pressure sensor is disposed on the touch screen, and the touch screen is a capacitive touch screen; The pressure sensor is used to detect and obtain a finger pressure signal; The capacitive touch screen is used to generate a capacitance change between the finger and the screen as the sensing signal when the finger touches the screen of the capacitive touch screen; The processor is further configured to determine a first finger pressing intensity according to the finger pressing pressure signal, and determine a position of a first finger touch point and a first finger pressing area according to the capacitance change; Determine a reference fingerprint image template according to the first finger pressing force, the position of the first finger touch point and the first finger pressing area, wherein the fingerprint recognition device is preset with a plurality of fingerprint image templates corresponding to different second finger pressing force, second finger touch point positions and second finger pressing areas; The first fingerprint image corresponding to the finger is matched with the fingerprint image features of the reference fingerprint image template.

[0014] In a third aspect, the present invention further provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, any of the above-mentioned fingerprint recognition methods is implemented.

[0015] In a fourth aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the fingerprint recognition method described above is implemented.

[0016] In a fifth aspect, the present invention further provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the fingerprint recognition method described above is implemented.

[0017] The fingerprint recognition method and fingerprint recognition device provided by the present invention are applied to the fingerprint recognition device, the fingerprint recognition device includes a fingerprint light sensor and a touch screen, the touch screen includes a fingerprint recognition area, the method first obtains a touch detection result through the touch screen, wherein the touch detection result includes detecting that a finger is touching the fingerprint recognition area or not detecting that a finger is touching the fingerprint recognition area; then, when the touch detection result is that no finger is touching the fingerprint recognition area, light detection is performed through the fingerprint light sensor, and when the touch detection result is that a finger is touching the fingerprint recognition area, fingerprint detection is performed through the fingerprint light sensor, and a first fingerprint image corresponding to the finger is obtained based on the detection result of the fingerprint detection.

[0018] In the embodiment of the present application, the fingerprint recognition device obtains the touch detection result through the touch screen. The touch detection result includes the detection of a finger touching the fingerprint recognition area or the non-detection of a finger touching the fingerprint recognition area, thereby performing different operations (fingerprint detection or light detection) based on the touch detection result. If the touch detection result is that the finger touching the fingerprint recognition area is not detected, light detection is performed through the fingerprint light sensor. If the touch detection result is that the finger touching the fingerprint recognition area is detected, fingerprint detection is performed through the fingerprint light sensor and the first fingerprint image corresponding to the finger is obtained based on the detection result of the fingerprint detection, thereby realizing fingerprint recognition. In the present embodiment, the fingerprint light sensor is a module shared by the fingerprint sensing area and the light sensing area, which is compatible in structure and stacking. The stacking space of the overall structure becomes smaller, thereby improving the space utilization of the whole machine. In addition, only one device fingerprint light sensor is needed to realize the fingerprint detection and light detection functions at the same time, thereby reducing the cost of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the positions of the separate designs of the optical fingerprint module and the light sensing module in the electronic device in the prior art.

[0021] Figure 2 It is a schematic diagram of optical fingerprint module stacking in the prior art.

[0022] Figure 3 It is a schematic diagram of the stacking of photosensitive modules in the prior art.

[0023] Figure 4 It is a flowchart of a fingerprint recognition method provided by an embodiment of the present invention.

[0024] Figure 5 Schematic diagram of a fingerprint optical sensor provided by an embodiment of the present invention.

[0025] Figure 6 It is a schematic diagram of the principle of a fingerprint recognition method provided by an embodiment of the present invention.

[0026] Figure 7 It is a schematic diagram of the principle of a fingerprint recognition method provided by an embodiment of the present invention.

[0027] Figure 8 It is a flowchart of a fingerprint recognition method provided by an embodiment of the present invention.

[0028] Fig. 9 It is a schematic diagram of the principle of a fingerprint recognition method provided by an embodiment of the present invention.

[0029] Fig.10 It is a flowchart of a fingerprint matching method provided by an embodiment of the present invention.

[0030] Fig.11 It is a schematic diagram of the principle of a fingerprint matching method provided by an embodiment of the present invention.

[0031] Fig.12 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first" and "second" are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship.

[0034] In order to more clearly understand the various embodiments provided by the present invention, the applicant first briefly introduces the technical content involved in the present invention.

[0035] The current optical fingerprint module and light sensing module adopt a split design. Both are implemented in that the sensor converts the amount of light received from the outside world into electrical signals, and then the processor performs corresponding processing to realize the function. Figure 1 It is a schematic diagram of the position of the separate design of the optical fingerprint module and the light sensing module in the electronic device in the prior art. Figure 2 It is a schematic diagram of the stacking of optical fingerprint modules in the prior art. Figure 3 is a schematic diagram of the stacking of photosensitive modules in the prior art, see Figure 1 , 2 As shown in Figure 3, the disadvantages of the current separate design of optical fingerprint module and light sensing module are as follows: (1) The separate design of the optical fingerprint module and the light sensing module requires two holes in the screen, which affects the user experience. (2) The separate design of the optical fingerprint module and the light sensing module requires two discrete devices to be stacked, which affects the overall stacking of the whole machine and has low space utilization. (3) The separate design of fingerprint and light sensing requires the support of two independent devices, which is costly.

[0036] Based on the above shortcomings, the present invention provides a fingerprint recognition method and a fingerprint recognition device, which have the following advantages over the existing design solutions: (1) Fingerprint and light sensing integrated design, only one hole is needed on the screen, reducing the risk of dust ingress and screen light leakage, improving durability and user experience. (2) Fingerprint and light sensing integrated design, only one device is needed for stacking, which occupies a small space of the whole machine and improves the space utilization rate. (3) Fingerprint and light sensing integrated design, only one device is needed to realize fingerprint and light sensing functions, reducing the overall cost of the whole machine.

[0037] Combine the following Figure 4-Figure 12 The present invention describes a fingerprint recognition method and a fingerprint recognition device.

[0038] Figure 4 1 is a flow chart of a fingerprint recognition method provided by an embodiment of the present invention, the method is applied to a fingerprint recognition device, the fingerprint recognition device includes a fingerprint light sensor and a touch screen, the touch screen includes a fingerprint recognition area, such as Figure 4 As shown, the method includes the following steps: step 401, step 402 and step 403: Step 401, obtaining a touch detection result through the touch screen; the touch detection result includes detecting that a finger is touching the fingerprint recognition area or not detecting that a finger is touching the fingerprint recognition area; Specifically, it should be noted that the execution subject of this embodiment is a fingerprint recognition device, and more specifically, the execution subject may be a processor in the fingerprint recognition device.

[0039] The fingerprint recognition device includes a fingerprint light sensor Sensor and a touch screen (Touch Panel, TP), and the TP includes a fingerprint recognition area, wherein: Figure 5 FIG. 1 is a schematic diagram of a fingerprint optical sensor provided by an embodiment of the present invention. Figure 5 As shown, the fingerprint light sensor is a sensor with a fingerprint sensing area and a light sensing area as a common module. The light sensing area in the fingerprint light sensor Sensor is used for light sensing detection, and the fingerprint sensing area in the fingerprint light sensor Sensor is used for fingerprint detection. Exemplarily, the light sensing area and the fingerprint sensing area can overlap partially or completely, which is conducive to reducing the light sensing area required for the fingerprint sensor.

[0040] In this embodiment, the specific implementation process of fingerprint recognition can be achieved through the following steps: First, the processor of the fingerprint recognition device obtains the touch detection result through the touch screen TP. The touch detection result includes the detection of a finger touching the fingerprint recognition area or the failure to detect a finger touching the fingerprint recognition area. It should be noted that the acquisition of the touch detection result is determined by the processor based on the sensing signal of the touch screen TP, and the sensing signal of the touch screen TP is generated by the touch screen in response to the finger contact.

[0041] Among them, the full screen of the touch screen TP, that is, the screen touch area, includes the fingerprint recognition area in the screen touch area, and the processor can scan the screen touch area in real time to obtain the touch detection result. The touch screen may include a capacitor array. When the finger is pressed, the charge in the capacitor array is absorbed, resulting in a change in the capacitor voltage in the finger pressing area, thereby generating a sensing signal. More specifically, when the finger presses the fingerprint recognition area, the capacitor voltage in the fingerprint recognition area changes. The processor can determine the touch detection result based on the sensing signal, and the touch detection result may include whether a finger is detected to perform a touch operation on the fingerprint recognition area.

[0042] After obtaining the touch detection result, the fingerprint recognition device (processor) determines what operation the fingerprint recognition device (processor) needs to enter next based on the touch detection result, for example, a fingerprint detection operation or a real-time light sensing detection operation.

[0043] Specifically, after the touch screen sends the sensing signal to the processor, the processor first determines the touch detection result based on the sensing signal (that is, whether there is a finger touching the fingerprint recognition area). It can be understood that there are two types of touch detection results of the processor: one is that a finger is detected to be touching the fingerprint recognition area (the corresponding sensing signal of the touch screen is that the capacitance voltage of the fingerprint recognition area has changed, that is, the fingerprint recognition area of ​​the touch screen is pressed by a finger), and the processor performs fingerprint detection through the fingerprint light sensor; the other is that no finger is detected to be touching the fingerprint recognition area (the corresponding sensing signal of the touch screen is that the capacitance voltage of the fingerprint recognition area of ​​the touch screen has not changed and the capacitance voltage in the area outside the fingerprint recognition area of ​​the touch screen has changed, that is, there is no finger pressing the fingerprint recognition area), and the processor performs light detection based on the fingerprint light sensor.

[0044] Step 402: When the touch detection result is that no finger is detected to perform a touch operation on the fingerprint recognition area, light sensing detection is performed by using a fingerprint light sensing sensor; or, Specifically, after obtaining the touch detection result, the fingerprint recognition device (processor) performs different operations according to different touch detection results. The examples are as follows: When the touch detection result is that no finger is detected to perform a touch operation on the fingerprint recognition area, that is, the fingerprint recognition device does not need to perform fingerprint detection, and the fingerprint recognition device performs a normal light detection LightDetect operation.

[0045] Furthermore, the fingerprint recognition device (processor) performs light sensing detection through the fingerprint light sensing sensor. More specifically, in the light sensing detection operation, the sensing of the light signal is realized by the fingerprint light sensing sensor.

[0046] For example, Figure 6 FIG. 1 is a schematic diagram showing the principle of a fingerprint recognition method provided by an embodiment of the present invention, and is a schematic diagram showing the principle of a light sensing detection operation. Figure 6 As shown, the external light source Light shines onto the fingerprint light sensor through the gap of the diode in the display screen, and the fingerprint light sensor senses the light signal.

[0047] Furthermore, the fingerprint recognition device (processor) can implement operations such as screen brightness adjustment according to the intensity of the sensed light signal.

[0048] Step 403: When the touch detection result indicates that a finger is touching the fingerprint recognition area, fingerprint detection is performed by using a fingerprint light sensor, and a first fingerprint image corresponding to the finger is obtained based on the fingerprint detection result.

[0049] Specifically, when the touch detection result of the fingerprint recognition device (processor) is that a finger is detected to perform a touch operation on the fingerprint recognition area, that is, the fingerprint recognition device needs to perform fingerprint detection, and thus, the fingerprint recognition device performs a fingerprint detection Finger Detect operation.

[0050] Furthermore, the fingerprint recognition device (processor) implements the fingerprint detection FingerDetect operation through the fingerprint light sensor. Specifically, in the fingerprint detection FingerDetect operation, the sensing of the optical signal is also implemented by the fingerprint light sensor, for example, sensing the reflected light signal, which is the light signal emitted by the display screen and reflected on each pixel in the fingerprint light sensor after reaching the finger.

[0051] Furthermore, the fingerprint recognition device (processor) can implement operations such as fingerprint recognition based on the sensed reflected light signal, for example, determine the detection result of the fingerprint detection based on the sensed reflected light signal, and then generate a first fingerprint image corresponding to the finger based on the detection result of the fingerprint detection. For example, a grayscale image is output based on the intensity of the light sensed by each pixel, and the corresponding first fingerprint image is further formed based on the grayscale image.

[0052] In an embodiment of the present application, the method is applied to a fingerprint recognition device, the fingerprint recognition device includes a fingerprint light sensor and a touch screen, the touch screen includes a fingerprint recognition area, the method first obtains a touch detection result through the touch screen, wherein the touch detection result includes detecting that a finger is touching the fingerprint recognition area or not detecting that a finger is touching the fingerprint recognition area; then, when the touch detection result is that no finger is touching the fingerprint recognition area, light detection is performed through the fingerprint light sensor, and when the touch detection result is that a finger is touching the fingerprint recognition area, fingerprint detection is performed through the fingerprint light sensor, and a first fingerprint image corresponding to the finger is obtained based on the detection result of the fingerprint detection.

[0053] In the embodiment of the present application, the fingerprint recognition device obtains the touch detection result through the touch screen. The touch detection result includes the detection of a finger touching the fingerprint recognition area or the non-detection of a finger touching the fingerprint recognition area, thereby performing different operations (fingerprint detection or light detection) based on the touch detection result. If the touch detection result is that the finger touching the fingerprint recognition area is not detected, light detection is performed through the fingerprint light sensor. If the touch detection result is that the finger touching the fingerprint recognition area is detected, fingerprint detection is performed through the fingerprint light sensor and the first fingerprint image corresponding to the finger is obtained based on the detection result of the fingerprint detection, thereby realizing fingerprint recognition. In the present embodiment, the fingerprint light sensor is a module shared by the fingerprint sensing area and the light sensing area, which is compatible in structure and stacking. The stacking space of the overall structure becomes smaller, thereby improving the space utilization of the whole machine. In addition, only one device fingerprint light sensor is needed to realize the fingerprint detection and light detection functions at the same time, thereby reducing the cost of the whole machine.

[0054] It should be noted that each implementation method of the present application can be freely combined, the order can be changed, or it can be executed separately, and does not need to rely on or depend on a fixed execution order.

[0055] In some embodiments, the fingerprint recognition device further includes a display screen, and the fingerprint light sensor includes a pixel array; and fingerprint detection is performed by the fingerprint light sensor, including: The pixel array is used to sense the reflected light signal to obtain the fingerprint detection result; the reflected light signal is the light signal emitted by the display screen and then reflected on each pixel in the pixel array after reaching the finger.

[0056] In some embodiments, the fingerprint recognition device further includes a display screen. Figure 7 FIG. 1 is a schematic diagram showing the principle of a fingerprint recognition method provided by an embodiment of the present invention. Figure 7As shown, the fingerprint recognition device includes a display screen. Exemplarily, the display screen is made of OLED (Organic Light-Emitting Diode), which is a current-type organic light-emitting device that emits light through the injection and recombination of carriers. The luminous intensity is proportional to the injected current.

[0057] The fingerprint optical sensor includes a pixel array, where it can be understood that a sensor is a measuring device that converts the measured quantity into a certain physical quantity that has a certain corresponding relationship with it and is easy to apply; a pixel array refers to a collection of pixels arranged in a certain pattern in the fingerprint optical sensor. Figure 5 As shown, the fingerprint optical sensor includes a pixel array composed of a plurality of pixels.

[0058] Correspondingly, the process of performing fingerprint detection by the fingerprint light sensor in step 403 is implemented by the following steps: First, the pixel array of the fingerprint light sensor is used to sense the reflected light signal, which is the light signal emitted by the display screen and reflected on each pixel in the pixel array after reaching the finger.

[0059] For example, Figure 7 FIG. 1 is a schematic diagram showing the principle of a fingerprint recognition method according to an embodiment of the present invention, and is a schematic diagram showing the principle of a fingerprint detection operation. Figure 7 As shown, the display screen emits light, and then the light emitted by the display screen is reflected after reaching the finger, and then the reflected light is reflected to the fingerprint light sensor through the gap of the diode in the display screen to form the reflected light signal.

[0060] Further, the fingerprint recognition device determines the detection result of the fingerprint detection based on the reflected light signal. The detection result of the fingerprint detection is, for example, a grayscale image. For example, the detection result of the fingerprint detection is determined as follows: the intensity of the light signal sensed by each pixel in the pixel array is determined according to the sensed reflected light signal. It can be understood that each pixel in the pixel array can be regarded as a light sensor. Further, a grayscale image is formed based on the intensity of the light sensed by each pixel. After that, the first fingerprint image can be generated based on the grayscale image as needed.

[0061] Optionally, after the fingerprint detection is completed, the fingerprint recognition device automatically switches to the light sensing detection module.

[0062] In an embodiment of the present application, the fingerprint recognition device also includes a display screen, and the fingerprint light sensor includes a pixel array, and each pixel in the pixel array can be regarded as a light sensor. The fingerprint detection process is as follows: the pixel array is used to sense the reflected light signal to obtain the detection result of the fingerprint detection, wherein the reflected light signal is the light signal emitted by the display screen and reflected on each pixel in the pixel array after reaching the finger. In this embodiment, if the fingerprint recognition device needs to detect the fingerprint, the fingerprint detection is performed by sensing the reflected light signal through the pixel array of the fingerprint light sensor, and there is no need to deploy a fingerprint recognition module separately, which saves the space utilization of the whole machine.

[0063] In some embodiments, light sensing detection is performed by a fingerprint light sensing sensor, including: The intensity of the external ambient light signal is sensed by the pixel array to obtain the detection result of the light sensing detection; The method further includes: The screen brightness of the display screen is adjusted according to the detection result of the light sensing detection.

[0064] Specifically, in some embodiments, the process of performing light sensing detection by the fingerprint light sensing sensor in step 402 can be implemented by the following steps, including: First, the fingerprint recognition device uses a pixel array to sense the intensity of the external ambient light signal to obtain the detection result of the light detection.

[0065] For example, Figure 6 FIG. 1 is a schematic diagram showing the principle of a fingerprint recognition method provided by an embodiment of the present invention, and is a schematic diagram showing the principle of a light sensing detection operation. Figure 6 As shown, the external ambient light signal, that is, the external light source Light, passes through the gaps in the organic light emitting diodes in the display screen and hits the fingerprint light sensor. Then, the pixel array in the fingerprint light sensor senses the external ambient light signal in real time, that is, each pixel in the pixel array senses the external ambient light signal in real time.

[0066] The detection result of the light sensing detection may be the overall light intensity sensed by the fingerprint light sensing sensor. The overall light intensity of the fingerprint light sensing sensor, that is, the overall light intensity, may be determined based on the intensity of the external ambient light signal sensed by the pixel array.

[0067] Furthermore, the fingerprint recognition device can adjust the screen brightness of the display screen according to the detection result of the light sensing detection (the overall light sensitivity of the fingerprint light sensor). For example, the screen brightness of the display screen can be adjusted according to the detected overall light sensitivity and the preset light sensitivity.

[0068] In the embodiment of the present application, if the fingerprint recognition device needs to perform a light sensing operation, the pixel array is first used to sense the intensity of the external ambient light signal to obtain the light sensing detection result, which can be the overall light intensity of the fingerprint light sensor; then, the screen brightness of the display screen is adjusted according to the light sensing detection result. In this embodiment, the fingerprint sensing area and the light sensing area share one module, which saves the space utilization of the whole machine.

[0069] Figure 8 FIG. 1 is a flow chart of a fingerprint recognition method provided by an embodiment of the present invention. Figure 8 As shown, the method represents the specific process of fingerprint recognition by the fingerprint recognition device (processor), including: First, the screen touch area of ​​the touch screen is scanned, and the screen touch area includes the fingerprint recognition area.

[0070] Furthermore, the touch screen detects whether a finger is touching the fingerprint recognition area.

[0071] If yes, fingerprint detection is performed.

[0072] Fingerprint detection process: fingerprint detection is performed based on the intensity of light sensed by the pixel array of the fingerprint light sensor and a fingerprint image is drawn; fingerprint matching is performed and the current brightness of the screen is maintained; matching is successful; If not, perform light detection.

[0073] Light sensing process: Determine the global brightness based on the intensity of light sensed by the pixel array of the fingerprint light sensor; adjust the screen brightness.

[0074] In this embodiment, the fingerprint module and the light sensing module are designed as one body, and only one hole is needed on the front of the screen. Figure 6 and Figure 7 As shown, only a touch hole needs to be opened on the front of the screen, and the hole structure works in time-sharing, wherein the front of the screen refers to the side of the fingerprint recognition device close to the touch screen, and the hole opening position is specifically on the protective layer between the organic light emitting diode and the optical lens under the touch screen. After the hole is opened on the protective layer, the hole structure is used for the fingerprint light sensor to sense the external light signal through the hole structure. Furthermore, the processor can perform different operations (such as light detection operation or fingerprint detection operation) based on the external light signal sensed by the fingerprint light sensor. That is, the present invention realizes that the photosensing functions of light detection and fingerprint detection are all realized through this one hole, which not only reduces the risk of dust ingress and screen light leakage, but also improves durability and user experience, and only requires one device for stacking, occupies a small space of the whole machine, improves space utilization and reduces the overall cost of the whole machine.

[0075] In some embodiments, the fingerprint recognition device further includes a pressure sensor, which is disposed on a touch screen, and the touch screen is a capacitive touch screen; the method further includes: Determine the first finger pressing force according to the finger pressing pressure signal, and determine the position of the first finger touch point and the first finger pressing area according to the capacitance change; the finger pressing pressure signal is detected by the pressure sensor, and the capacitance change is formed by the capacitive touch screen when the finger contacts the capacitive touch screen; Determine a reference fingerprint image template according to the first finger pressing force, the position of the first finger touch point and the first finger pressing area, wherein the fingerprint recognition device is preset with a plurality of fingerprint image templates corresponding to different second finger pressing force, second finger touch point positions and second finger pressing areas; The first fingerprint image corresponding to the finger is matched with the fingerprint image features of the reference fingerprint image template.

[0076] Specifically, in some embodiments, the touch screen of the fingerprint recognition device is a capacitive touch screen, and the fingerprint recognition device also includes a pressure sensor. Fig. 9 FIG. 1 is a schematic diagram showing the principle of a fingerprint recognition method provided by an embodiment of the present invention. Fig. 9 As shown, the TP touch screen of the fingerprint recognition device is a capacitive touch screen, and the pressure sensor is arranged on the touch screen.

[0077] With the popularization of consumer terminal products, people have higher and higher requirements for the information security and unlocking experience of consumer terminal products. Currently, almost all consumer terminal products are equipped with biometric sensors such as fingerprints, but due to the characteristics of the products themselves, the user experience of unlocking speed and success rate has not been optimized. Therefore, solutions combining other sensor technologies have emerged. The current fingerprint matching method is a polling method, that is, the collected fingerprint images and pre-entered images are matched one by one. If the match is successful, the unlocking is completed. If the match is unsuccessful, the next one is matched until all fingerprint templates in the gallery are matched. The whole process ends. The disadvantages of the existing solution are: ① Matching each image in the gallery once consumes unlocking time, affecting the user experience. ② The fingerprint pattern matching is not accurate, and matching one by one affects the unlocking success rate, resulting in poor user experience.

[0078] In the fingerprint recognition method of this embodiment, after obtaining the fingerprint detection result, a fingerprint recognition operation, that is, a fingerprint matching operation, can also be performed. Exemplarily, the process of performing fingerprint matching is as follows: First, the fingerprint recognition device detects the finger's pressing pressure signal through the pressure sensor set on the TP touch screen. The pressure sensor is set on the touch screen. When different fingers press the TP touch screen, the pressure sensor can detect the finger's pressing force. Then, the fingerprint recognition device can determine the first finger's pressing force according to the finger's pressing pressure signal. The determination of the finger's pressing force can be achieved by the following method: It should be noted that a pressure sensor is a sensor used to detect the magnitude of pressure. It is mainly composed of a force-sensitive element, a conversion element, and a circuit part, and is used to convert the magnitude of force into a related electrical signal. The pressure sensor obtains force signals in the following ways: 1. The measured force causes the elastic body to produce a corresponding displacement, and the force signal is obtained by displacement measurement. 2. The strain gauge is pasted on the surface of the elastic element to form a sensor. The elastic element deforms when subjected to force, changing the resistance value of the strain gauge, and the force signal is obtained through resistance measurement. 3. The piezoelectric crystal directly converts the force into a potential difference through the piezoelectric effect, thereby obtaining a force signal. 4. The force causes the natural frequency of the mechanical resonance system to change, and the relevant information of the force is obtained through frequency measurement. 5. Through the balance between the electromagnetic force and the measured force, the force information is obtained from the relevant electromagnetic parameters at the time of balance.

[0079] Furthermore, after obtaining the finger's pressing pressure signal (electrical signal), the fingerprint recognition device can reversely calculate the corresponding force signal, that is, the finger's pressing force, based on the electrical signal.

[0080] Furthermore, by detecting the capacitance change formed when a finger touches the capacitive touch screen, the position of the first finger touch point and the first finger pressing area are determined according to the capacitance change. The capacitive touch screen is similar to a mesh containing multiple capacitance nodes (within a mesh of 4mm*4mm). When fingers of different sizes press with different strengths, the contact area with the capacitive touch screen is different, so the number of nodes that produce capacitance changes is different. Therefore, the fingerprint recognition device can determine the area pressed by the finger through the changed node capacitance.

[0081] Furthermore, after obtaining the first finger pressing force, the position of the first finger touch point and the first finger pressing area, the reference fingerprint image template can be further determined according to the first finger pressing force, the position of the first finger touch point and the first finger pressing area. The process of determining the reference fingerprint image template of the first finger is as follows: It should be noted that the fingerprint recognition device is preset with multiple fingerprint image templates corresponding to different second finger pressing force, second finger touch point position and second finger pressing area, wherein the second finger pressing force, second finger touch point position and second finger pressing area are information stored in a preset fingerprint library, which is used to match the first finger pressing force, first finger touch point position and first finger pressing area, and finally determine the reference fingerprint image template of the first finger. That is, based on the conditions of the first finger pressing force, first finger touch point position and first finger pressing area, the reference fingerprint image template can be determined by querying in the preset fingerprint image template, and the reference fingerprint image template may be one or more.

[0082] Furthermore, the first fingerprint image corresponding to the finger can be matched with the fingerprint image features of the reference fingerprint image template. The fingerprint matching and identification process is exemplified as follows: (1) The first fingerprint image corresponding to the finger is enlarged according to the pressure of the first finger, the position of the touch point of the first finger and the pressing area of ​​the first finger to obtain the second fingerprint image corresponding to the finger. That is, the collected pressure, touch and fingerprint information is enlarged and filtered by algorithms to obtain a fingerprint grayscale image with relatively clear lines. The clarity of the fingerprint lines in the second fingerprint image corresponding to the finger is greater than the clarity of the fingerprint lines in the first fingerprint image corresponding to the finger.

[0083] (2) Perform image feature extraction on the second fingerprint image corresponding to the finger to obtain fingerprint image features corresponding to the finger.

[0084] (3) Matching the fingerprint image features corresponding to the finger with the fingerprint image features of the reference fingerprint image template to obtain a matching result. The fingerprint recognition device is preset with multiple fingerprint image templates corresponding to different second finger pressing strengths, second finger touch point positions, and second finger pressing areas.

[0085] Optionally, after obtaining the fingerprint matching result, a conclusion is output, and the conclusion can be used to complete the subsequent device unlocking work.

[0086] In an embodiment of the present application, the fingerprint recognition device determines the first finger pressing force according to the finger pressing pressure signal, and determines the position of the first finger touch point and the first finger pressing area according to the capacitance change, wherein the finger pressing pressure signal is obtained by detection by a pressure sensor, and the capacitance change is formed when the finger contacts the capacitive touch screen through the capacitive touch screen; then, according to the first finger pressing force, the position of the first finger touch point and the first finger pressing area, a reference fingerprint image template is determined, and the fingerprint recognition device is preset with multiple fingerprint image templates corresponding to different second finger pressing force, second finger touch point positions and second finger pressing areas; then, the first fingerprint image corresponding to the finger is matched with the fingerprint image features of the reference fingerprint image template to achieve fingerprint recognition. In this embodiment, the fingerprint detection result is combined with the TP touch and pressure sensing functions. The three types of information are linked to prioritize finding the most suitable reference fingerprint image template for matching. That is, combining fingerprint unlocking and pressure sensing detection can effectively reduce the time for matching templates during fingerprint detection, thereby improving the fingerprint recognition speed. It should be noted that although the three types of information linkage lead to an increase in the time for merging input conditions, compared with the time for matching the reference template, the time for merging input conditions is much less than the time for matching the reference template. Therefore, the total time for fingerprint recognition is reduced and the fingerprint recognition speed is improved. In addition, the success rate of fingerprint unlocking can be improved by increasing the logical matching methods such as fingerprint area and pressure.

[0087] For example, Fig.10 FIG. 1 is a flow chart of a fingerprint matching method provided by an embodiment of the present invention. Fig.10 As shown, the method includes: First, scan the screen touch area of ​​the touch screen; Furthermore, the touch screen detects whether a finger is touching the fingerprint recognition area; If the result is yes, fingerprint matching is performed; the fingerprint matching process includes: The pressure sensor detects the force of the finger pressing; the TP touch screen detects the area of ​​the finger pressing; the fingerprint light sensor detects the fingerprint image; Further, find the most suitable template in the library for matching; If the match is successful, the fingerprint is unlocked; if the match fails, the most suitable template in the library is found again for matching.

[0088] For example, Fig.11 FIG. 1 is a schematic diagram showing the principle of a fingerprint matching method provided by an embodiment of the present invention. Fig.11 As shown, the fingerprint matching process includes: Preprocess the second fingerprint image and extract the second fingerprint features according to the second finger coordinate area signal, the second fingerprint signal collection, and the second pressing pressure signal, and enter the second fingerprint image template library; According to the first finger coordinate area signal, the first fingerprint signal collection, and the first pressing pressure size signal, the first fingerprint image is preprocessed, the first fingerprint feature is extracted, and the fingerprint is matched with the fingerprint image template library to output the conclusion.

[0089] The present invention also provides a fingerprint recognition device, the fingerprint recognition device comprises a touch screen, a fingerprint light sensor and a processor, the touch screen comprises a fingerprint recognition area; wherein, The touch screen is used to generate a sensing signal in response to finger contact; The processor is configured to: Acquire a touch detection result according to the sensing signal of the touch screen; the touch detection result includes detecting that a finger performs a touch operation on the fingerprint recognition area or not detecting that a finger performs a touch operation on the fingerprint recognition area; When the detection result is that no finger is detected to perform a touch operation on the fingerprint recognition area, light sensing detection is performed by the fingerprint light sensing sensor; or, When the detection result is that a finger is detected to perform a touch operation on the fingerprint recognition area, fingerprint detection is performed by the fingerprint light sensor, and a first fingerprint image corresponding to the finger is obtained based on the detection result of the fingerprint detection.

[0090] Specifically, it should be noted that the execution subject of this embodiment is a fingerprint recognition device. The fingerprint recognition device includes a fingerprint light sensor Sensor, a touch screen TP and a processor, wherein the screen touch area of ​​the touch screen TP includes a fingerprint recognition area, such as Figure 5 As shown, the fingerprint light sensor is a sensing area of ​​the fingerprint sensing area and the light sensing area. The fingerprint light sensor Sensor can be used for light sensing operation of light sensing detection, and can also be used for light sensing operation of fingerprint detection.

[0091] First, the touch screen is used to generate a sensing signal in response to finger contact, wherein the touch screen may include a capacitor array. When the finger is pressed, the charge in the capacitor array is absorbed, causing the capacitor voltage in the finger pressing area to change, thereby generating a sensing signal. Further, the processor can determine the touch detection result based on the sensing signal of the touch screen.

[0092] Among them, the sensing signal of the touch screen is specifically generated through the following steps: when a finger touches the fingerprint recognition area, the capacitive voltage of the fingerprint recognition area changes to generate a corresponding sensing signal; when no finger touches the fingerprint recognition area, the capacitive voltage of the fingerprint recognition area does not change, but the capacitive voltage in the area outside the fingerprint recognition area in the screen touch area changes, thus generating a corresponding sensing signal.

[0093] After the processor obtains the sensing signal generated by the touch screen, it further determines the touch detection result based on the sensing signal of the touch screen. There are two types of touch detection results: one is that when the sensing signal is a sensing signal corresponding to the change of the capacitance signal of the fingerprint recognition area, the touch detection result is determined to be that a finger is detected to perform a touch operation on the fingerprint recognition area; the other is that when the sensing signal is a sensing signal corresponding to the capacitance signal of the fingerprint recognition area without change (and the capacitance voltage in the area outside the fingerprint recognition area of ​​the screen touch area changes), the touch detection result is determined to be that no finger is detected to perform a touch operation on the fingerprint recognition area.

[0094] Furthermore, the processor determines what operation to enter next based on the touch detection result, that is, whether the processor of the fingerprint recognition device performs fingerprint recognition, that is, whether the processor performs a fingerprint detection operation, or performs a real-time light sensing detection operation.

[0095] When the detection result is that no finger is detected to perform a touch operation on the fingerprint recognition area, the processor performs light sensing detection through the fingerprint light sensor; When the detection result is that a finger is detected to perform a touch operation on the fingerprint recognition area, the processor performs fingerprint detection through the fingerprint light sensor and obtains a first fingerprint image corresponding to the finger based on the detection result of the fingerprint detection. For example, a grayscale image is output based on the intensity of light sensed by each pixel, and the corresponding first fingerprint image is further formed based on the grayscale image.

[0096] In an embodiment of the present application, the touch screen is used to generate a sensing signal in response to finger contact, and the processor is used to obtain a touch detection result based on the sensing signal of the touch screen; wherein the detection result includes detecting that a finger is touching the fingerprint recognition area or not detecting that a finger is touching the fingerprint recognition area; when the touch detection result is that no finger is touching the fingerprint recognition area, the processor performs light detection through the fingerprint light sensor; when the touch detection result is that a finger is touching the fingerprint recognition area, the processor performs fingerprint detection through the fingerprint light sensor, and based on the detection result of the fingerprint detection, obtains a first fingerprint image corresponding to the finger.

[0097] In the embodiment of the present application, the touch screen generates a sensing signal in response to finger contact, and the processor determines the touch detection result based on the sensing signal and performs the corresponding operation (fingerprint detection or light detection) according to the touch detection result. If the touch detection result is that no finger is detected to touch the fingerprint recognition area, light detection is performed through the fingerprint light sensor. If the touch detection result is that a finger is detected to touch the fingerprint recognition area, fingerprint detection is performed through the fingerprint light sensor and the first fingerprint image corresponding to the finger is obtained based on the detection result of the fingerprint detection to realize fingerprint recognition. In this embodiment, the fingerprint light sensor is a module shared by the fingerprint sensing area and the light sensing area, which is compatible in structure and stacking, and the stacking space in the overall structure becomes smaller, thereby improving the space utilization of the whole machine. In addition, only one device fingerprint light sensor is needed to realize the fingerprint detection and light detection functions at the same time, reducing the cost of the whole machine.

[0098] In some embodiments, the fingerprint recognition device further includes a display screen, and the fingerprint light sensor includes a pixel array; the fingerprint light sensor is specifically used for: The pixel array is used to sense reflected light signals; the reflected light signals are light signals emitted by the display screen and reflected on each pixel in the pixel array after reaching the finger; The processor is specifically used for: The detection result of the fingerprint detection is obtained according to the intensity of the reflected light signal sensed by each pixel in the pixel array.

[0099] Specifically, in some embodiments, the fingerprint recognition device also includes a display screen such as a display screen made of OLED organic light emitting diodes, and the fingerprint light sensor includes a pixel array. The pixel array refers to a set of pixels arranged in a certain pattern in an image sensor for sensing light signals.

[0100] Correspondingly, the fingerprint light sensor is specifically used for: First, the pixel array is used to sense the reflected light signal, wherein the reflected light signal is a light signal emitted by the display screen and reflected on each pixel in the pixel array after reaching the finger; the processor is specifically used to obtain the detection result of the fingerprint detection according to the intensity of the reflected light signal sensed by each pixel in the pixel array.

[0101] For example, the steps of the fingerprint detection process include: When a finger is detected pressing on the fingerprint recognition area of ​​the screen, the fingerprint light sensor switches to fingerprint recognition mode. When switching to fingerprint mode, the screen brightness remains unchanged.

[0102] Furthermore, the fingerprint area is illuminated by locally highlighting the screen (1000nit), and the light signal is reflected to the fingerprint light sensor. Each pixel on the sensor outputs the intensity of the light sensed by each pixel according to the reflected light intensity signal. A grayscale image is formed based on the intensity of the light sensed by each pixel, and the fingerprint path pattern is drawn according to the grayscale image of the entire pixel.

[0103] In this embodiment, if the fingerprint recognition device needs to detect the fingerprint, the fingerprint detection is performed by sensing the reflected light signal through the pixel array of the fingerprint light sensor, and there is no need to deploy a fingerprint recognition module separately, thus saving the space utilization of the whole machine.

[0104] In some embodiments, the fingerprint recognition device further includes an optical lens, which is a lens disposed between the display screen and the fingerprint sensor, and is used to: focus the light signal reflected from the finger; The fingerprint optical sensor is specifically used for: The pixels in the pixel array are used to sense the light signal focused by the optical lens.

[0105] Specifically, in some embodiments, the fingerprint recognition device further includes an optical lens, which is a lens disposed between the display screen and the fingerprint sensor. The lens refers to a lens made of a transparent material (usually glass or plastic) and is used to focus light to form an image. In this embodiment, the optical lens is used to focus the light signal reflected from the finger, and further, the focused light signal reaches the fingerprint light sensor.

[0106] The fingerprint light sensor is specifically used to sense the light signal focused by the optical lens using each pixel in the pixel array. Thus, the light signal intensity sensed by the fingerprint light sensor is higher, which facilitates subsequent accurate fingerprint recognition and other operations.

[0107] In the embodiment of the present application, the optical lens arranged between the display screen and the fingerprint sensor focuses the light signal reflected from the finger, and then the fingerprint light sensor uses each pixel in the pixel array to sense the light signal focused by the optical lens. The purpose of the optical lens is mainly to collect light signals. By focusing light through the lens (pinhole imaging), the area of ​​the fingerprint light sensor can be made smaller, thereby reducing the cost of the entire device.

[0108] In some embodiments, the fingerprint recognition device further includes a display screen, and the fingerprint light sensor includes a pixel array; the fingerprint light sensor is specifically used for: Using the pixel array to sense the intensity of the external ambient light signal, the overall light sensitivity intensity of the fingerprint light sensor is calculated; The processor is specifically used for: The light sensing detection result is determined according to the overall light sensing intensity of the fingerprint light sensing sensor.

[0109] Specifically, in some embodiments, the fingerprint recognition device also includes a display screen, and the fingerprint light sensor includes a pixel array.

[0110] The fingerprint light sensor is specifically used to use the pixel array to sense the intensity of the external ambient light signal and calculate the overall light intensity of the fingerprint light sensor. The process is exemplified as follows: summing the intensities of the external ambient light signals corresponding to the pixels to obtain a summed result; dividing the summed result by the number of pixels included in the fingerprint light sensor to obtain the overall light intensity.

[0111] Furthermore, the processor is specifically configured to determine the light sensing detection result according to the overall light sensing intensity of the fingerprint light sensing sensor, for example, whether the screen brightness needs to be adjusted.

[0112] In the embodiment of the present application, the fingerprint recognition device further includes a display screen, and the fingerprint light sensor includes a pixel array; the fingerprint light sensor uses the pixel array to sense the intensity of the external ambient light signal and calculates the overall light sensitivity of the fingerprint light sensor; the processor determines the light sensing detection result according to the overall light sensitivity of the fingerprint light sensor. In this embodiment, if the fingerprint recognition device does not need to detect the fingerprint, a light sensing detection operation is performed, and the intensity of the external ambient light signal is sensed by the pixel array to obtain the light sensing detection result, and the fingerprint sensing area and the light sensing area are combined into one module, which saves the space utilization of the whole machine.

[0113] In some embodiments, the fingerprint recognition device further includes a pressure sensor, and the pressure sensor is disposed on the touch screen, and the touch screen is a capacitive touch screen; The pressure sensor is used to detect and obtain a finger pressure signal; The capacitive touch screen is used to form a capacitance change between the screen and the finger when the finger touches the screen of the capacitive touch screen; The processor is further configured to determine a first finger pressing intensity according to the finger pressing pressure signal, and determine a position of a first finger touch point and a first finger pressing area according to the capacitance change; Determine a reference fingerprint image template according to the first finger pressing force, the position of the first finger touch point and the first finger pressing area, wherein the fingerprint recognition device is preset with a plurality of fingerprint image templates corresponding to different second finger pressing force, second finger touch point positions and second finger pressing areas; The first fingerprint image corresponding to the finger is matched with the fingerprint image features of the reference fingerprint image template.

[0114] Specifically, in some embodiments, the fingerprint recognition device further includes a pressure sensor, and the pressure sensor is disposed on the touch screen, and the touch screen is a capacitive touch screen. The fingerprint recognition device can also be used for fingerprint matching. The process is exemplified as follows: The pressure sensor detects a finger pressure signal; the capacitive touch screen is used to generate a capacitance change between the finger and the screen when the finger touches the capacitive touch screen; The processor determines the first finger pressing force according to the pressing pressure signal of the finger, and determines the position of the first finger touch point and the first finger pressing area according to the capacitance change; determines the reference fingerprint image template according to the first finger pressing force, the position of the first finger touch point and the first finger pressing area, and the fingerprint recognition device is preset with multiple fingerprint image templates corresponding to different second finger pressing force, second finger touch point positions and second finger pressing areas; matches the first fingerprint image corresponding to the finger with the fingerprint image features of the reference fingerprint image template.

[0115] In an embodiment of the present application, the fingerprint recognition device also includes a pressure sensor, which is arranged on the touch screen, and the touch screen is a capacitive touch screen; the pressure sensor detects a finger pressure signal; the capacitive touch screen forms a capacitance change with the screen when the finger contacts the capacitive touch screen; the processor determines the first finger pressing force according to the finger pressing pressure signal, and determines the position of the first finger touch point and the first finger pressing area according to the capacitance change; determines the reference fingerprint image template according to the first finger pressing force, the position of the first finger touch point and the first finger pressing area, and the fingerprint recognition device is preset with multiple fingerprint image templates corresponding to different second finger pressing force, second finger touch point positions and second finger pressing areas; matches the first fingerprint image corresponding to the finger with the fingerprint image features of the reference fingerprint image template.

[0116] In this embodiment, the fingerprint detection result is combined with the TP touch and pressure sensing functions. The three types of information are linked to prioritize the most suitable reference fingerprint image template for matching. The time to merge the input conditions is much shorter than the time to match the reference template. That is, combining fingerprint unlocking and pressure sensing detection can effectively reduce the time to match the reference image template during fingerprint detection, thereby greatly improving the fingerprint recognition speed. In addition, by increasing the logical matching methods such as fingerprint area and pressure, the success rate of fingerprint unlocking is improved.

[0117] Fig.12 An example of a physical structure diagram of an electronic device is shown in FIG. Fig.12 As shown, the electronic device may include: a processor 1210, a communications interface 1220, a memory 1230 and a communication bus 1240, wherein the processor 1210, the communications interface 1220 and the memory 1230 communicate with each other through the communication bus 1240. The processor 1210 may call the logic instructions in the memory 1230 to execute the fingerprint recognition method, which is applied to a fingerprint recognition device, the fingerprint recognition device includes a fingerprint light sensor and a touch screen, the touch screen includes a fingerprint recognition area, and the method includes: Acquiring a touch detection result through the touch screen; the touch detection result includes detecting that a finger is performing a touch operation on the fingerprint recognition area or not detecting that a finger is performing a touch operation on the fingerprint recognition area; When the touch detection result is that no finger is detected to perform a touch operation on the fingerprint recognition area, light sensing detection is performed by the fingerprint light sensing sensor; or, When the touch detection result is that a finger is detected to perform a touch operation on the fingerprint recognition area, fingerprint detection is performed by the fingerprint light sensor, and a first fingerprint image corresponding to the finger is obtained based on the detection result of the fingerprint detection.

[0118] In addition, the logic instructions in the above-mentioned memory 1230 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0119] On the other hand, the present invention further provides a computer program product, the computer program product includes a computer program, the computer program can be stored in a non-transitory computer-readable storage medium, when the computer program is executed by a processor, the computer can execute the fingerprint recognition method provided by the above methods, the method is applied to a fingerprint recognition device, the fingerprint recognition device includes a fingerprint light sensor and a touch screen, the touch screen includes a fingerprint recognition area, the method includes: Acquiring a touch detection result through the touch screen; the touch detection result includes detecting that a finger is performing a touch operation on the fingerprint recognition area or not detecting that a finger is performing a touch operation on the fingerprint recognition area; When the touch detection result is that no finger is detected to perform a touch operation on the fingerprint recognition area, light sensing detection is performed by the fingerprint light sensing sensor; or, When the touch detection result is that a finger is detected to perform a touch operation on the fingerprint recognition area, fingerprint detection is performed by the fingerprint light sensor, and a first fingerprint image corresponding to the finger is obtained based on the detection result of the fingerprint detection.

[0120] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the fingerprint recognition method provided by the above methods is implemented. The method is applied to a fingerprint recognition device, the fingerprint recognition device includes a fingerprint light sensor and a touch screen, the touch screen includes a fingerprint recognition area, and the method includes: Acquiring a touch detection result through the touch screen; the touch detection result includes detecting that a finger is performing a touch operation on the fingerprint recognition area or not detecting that a finger is performing a touch operation on the fingerprint recognition area; When the touch detection result is that no finger is detected to perform a touch operation on the fingerprint recognition area, light sensing detection is performed by the fingerprint light sensing sensor; or, When the touch detection result is that a finger is detected to perform a touch operation on the fingerprint recognition area, fingerprint detection is performed by the fingerprint light sensor, and a first fingerprint image corresponding to the finger is obtained based on the detection result of the fingerprint detection.

[0121] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0122] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fingerprint recognition method, applied to a fingerprint recognition device, wherein the fingerprint recognition device comprises a fingerprint light sensor and a touch screen, wherein the touch screen comprises a fingerprint recognition area, and the method comprises: Acquiring a touch detection result through the touch screen; The touch detection result includes detecting that a finger performs a touch operation on the fingerprint recognition area or not detecting that a finger performs a touch operation on the fingerprint recognition area; When the touch detection result is that no finger is detected to perform a touch operation on the fingerprint recognition area, light sensing detection is performed by the fingerprint light sensing sensor; or, When the touch detection result is that a finger is detected to perform a touch operation on the fingerprint recognition area, fingerprint detection is performed by the fingerprint light sensor, and a first fingerprint image corresponding to the finger is obtained based on the detection result of the fingerprint detection.

2. The fingerprint recognition method according to claim 1, wherein the fingerprint recognition device further comprises a display screen, and the fingerprint light sensor comprises a pixel array; The fingerprint detection by the fingerprint light sensor includes: Using the pixel array to sense the reflected light signal, and obtaining the detection result of the fingerprint detection; The reflected light signal is a light signal generated when the light emitted by the display screen reaches the finger and is reflected on each pixel in the pixel array.

3. The fingerprint recognition method according to claim 2, wherein the fingerprint light sensor performs light detection, comprising: Using the pixel array to sense the intensity of the external ambient light signal to obtain the detection result of the light sensing detection; The method further comprises: The screen brightness of the display screen is adjusted according to the detection result of the light sensing.

4. According to any one of claims 1 to 3, the fingerprint recognition device further comprises a pressure sensor, the pressure sensor is arranged on the touch screen, and the touch screen is a capacitive touch screen; the method further comprises: Determine the first finger pressing intensity according to the finger pressing pressure signal, and determine the position of the first finger touch point and the first finger pressing area according to the capacitance change; The finger pressing pressure signal is detected by the pressure sensor, and the capacitance change is formed by the capacitive touch screen when the finger contacts the screen of the capacitive touch screen; Determine a reference fingerprint image template according to the first finger pressing force, the position of the first finger touch point and the first finger pressing area, wherein the fingerprint recognition device is preset with a plurality of fingerprint image templates corresponding to different second finger pressing force, second finger touch point positions and second finger pressing areas; The first fingerprint image corresponding to the finger is matched with the fingerprint image features of the reference fingerprint image template.

5. A fingerprint recognition device, comprising a touch screen, a fingerprint light sensor and a processor, wherein the touch screen comprises a fingerprint recognition area; wherein: The touch screen is used to generate a sensing signal in response to finger contact; The processor is configured to: Acquire a touch detection result according to the sensing signal of the touch screen; the touch detection result includes detecting that a finger performs a touch operation on the fingerprint recognition area or not detecting that a finger performs a touch operation on the fingerprint recognition area; When the detection result is that no finger is detected to perform a touch operation on the fingerprint recognition area, light sensing detection is performed by the fingerprint light sensing sensor; or, When the detection result is that a finger is detected to perform a touch operation on the fingerprint recognition area, fingerprint detection is performed by the fingerprint light sensor, and a first fingerprint image corresponding to the finger is obtained based on the detection result of the fingerprint detection.

6. The fingerprint recognition device according to claim 5, further comprising a display screen, wherein the fingerprint light sensor comprises a pixel array; and the fingerprint light sensor is specifically used for: The pixel array is used to sense reflected light signals; the reflected light signals are light signals emitted by the display screen and reflected on each pixel in the pixel array after reaching the finger; The processor is specifically used for: The detection result of the fingerprint detection is obtained according to the intensity of the reflected light signal sensed by each pixel in the pixel array.

7. The fingerprint recognition device according to claim 6, further comprising an optical lens, wherein the optical lens is a lens disposed between the display screen and the fingerprint sensor, and the optical lens is used to: focus the optical signal reflected from the finger; The fingerprint optical sensor is specifically used for: The pixels in the pixel array are used to sense the light signal focused by the optical lens.

8. The fingerprint recognition device according to claim 5, further comprising a display screen, wherein the fingerprint light sensor comprises a pixel array; and the fingerprint light sensor is specifically used for: Using the pixel array to sense the intensity of the external ambient light signal, the overall light sensitivity intensity of the fingerprint light sensor is calculated; The processor is specifically used for: The light sensing detection result is determined according to the overall light sensing intensity of the fingerprint light sensing sensor.

9. The fingerprint recognition device according to any one of claims 5 to 8, further comprising a pressure sensor, wherein the pressure sensor is disposed on the touch screen, and the touch screen is a capacitive touch screen; The pressure sensor is used to detect and obtain a finger pressure signal; The capacitive touch screen is used to generate a capacitance change between the finger and the screen as the sensing signal when the finger touches the screen of the capacitive touch screen; The processor is further configured to determine a first finger pressing intensity according to the finger pressing pressure signal, and determine a position of a first finger touch point and a first finger pressing area according to the capacitance change; Determine a reference fingerprint image template according to the first finger pressing force, the position of the first finger touch point and the first finger pressing area, wherein the fingerprint recognition device is preset with a plurality of fingerprint image templates corresponding to different second finger pressing force, second finger touch point positions and second finger pressing areas; The first fingerprint image corresponding to the finger is matched with the fingerprint image features of the reference fingerprint image template.

10. A fingerprint recognition device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the fingerprint recognition method according to any one of claims 1 to 4 is implemented.

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