CN111837128A - Fingerprint anti-counterfeiting method, fingerprint identification device and electronic equipment - Google Patents

Abstract

The embodiment of the application relates to a fingerprint anti-counterfeiting method, a fingerprint identification device and electronic equipment, which can better defend attack of 2D false fingerprints. This fingerprint identification device sets up in electronic equipment's display screen below, and the fingerprint detection area of this display screen includes first luminous region and second luminous region, and this fingerprint identification device includes: an optical path guiding structure for guiding a first optical signal of first return optical signals to the optical sensor, the first return optical signal being an optical signal returned after the light-emitting display pixels in the first light-emitting area do not emit light and the light emitted by the light-emitting display pixels in the second light-emitting area irradiates a finger; the optical sensor is used for receiving the first optical signal and comprises a first sensing area corresponding to the first light-emitting area, and the first optical signal received by the first sensing area is used for fingerprint anti-counterfeiting authentication.

Description

Fingerprint anti-counterfeiting method, fingerprint identification device and electronic equipment

Technical Field

The present application relates to the field of biometric identification, and in particular, to a fingerprint anti-counterfeiting method, a fingerprint identification apparatus, and an electronic device.

Background

Compared with capacitance fingerprints, the optical fingerprint is easier to crack, and especially 2D printing/extraction false fingerprints which are low in cost and easy to obtain have greater threat to the optical fingerprint. Along with the gradual popularization of the application modes of optical fingerprint unlocking and payment under the screen, the improvement of the safety of the optical fingerprint is urgent.

At present, the method for resisting by using the color of the 2D false fingerprint can solve the problem of false fingerprints with different colors from the color of a real finger, but has poor anti-counterfeiting effect on flesh color or reddish false fingerprints with similar colors to the color of the real finger.

Disclosure of Invention

The application provides a fingerprint anti-counterfeiting method, a fingerprint identification device and electronic equipment, which can better defend attack of 2D false fingerprints.

In a first aspect, a fingerprint identification device is provided below a display screen of an electronic device, where the display screen includes a fingerprint detection area, and the fingerprint detection area includes a first light-emitting area and a second light-emitting area, and the fingerprint identification device includes: an optical path guiding structure for guiding a first light signal of first return light signals to the optical sensor, the first return light signals being returned after the light-emitting display pixels in the first light-emitting area do not emit light and the light emitted by the light-emitting display pixels in the second light-emitting area irradiates a finger; the optical sensor is positioned below the optical path guiding structure and used for receiving the first optical signal, the optical sensor comprises a first sensing area corresponding to the first light-emitting area, and the first optical signal received by the first sensing area is used for fingerprint anti-counterfeiting authentication.

Therefore, the fingerprint identification device of the embodiment of the application sets a part of non-luminous area in the fingerprint detection area, the real finger can have transmission light in the part, and the 2D false fingerprint has no transmission light, so that the real finger and the 2D false fingerprint can be identified according to the light intensity of the optical signal received by the sensing area corresponding to the non-luminous area in the fingerprint identification device, namely, the attack of the 2D false fingerprint can be well defended by utilizing the difference of the light intensity, and the safety of optical fingerprint identification can be further ensured.

With reference to the first aspect, in an implementation manner of the first aspect, the optical sensor includes a second sensing area corresponding to the second light emitting area, and the first light signal received by the second sensing area is used for performing fingerprint recognition on the finger.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the optical path guiding structure is further configured to: guiding a second light signal of second return light signals returned after the light-emitting display pixels in the first and second light-emitting areas both emit light and irradiate a finger to the optical sensor; the optical sensor is further configured to: and receiving the second optical signal, wherein the second optical signal is used for fingerprint identification of the finger.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, an area of the second light emitting area is larger than an area of the first light emitting area.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, an area of the first light emitting area is smaller than a field area of the optical sensor.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the first light-emitting area is located in a center area or an edge area of the fingerprint detection area.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the first areas are symmetrically distributed with respect to a center point of the fingerprint detection area.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the first light-emitting region is a single connected region.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the first light-emitting area is square or circular.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the first light-emitting area includes a plurality of unconnected areas.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the first light-emitting area includes a plurality of stripe-shaped areas or a plurality of ring-shaped areas.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, a color of light emitted by the light-emitting display pixels of the second light-emitting area and illuminating the finger is any one of the following colors: pure red, pure green, pure cyan, pure white, gradient green, gradient cyan, and gradient white.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the optical path guiding structure includes an optical lens; or, the optical path guiding structure includes an optical collimator having a plurality of collimating units or micro-pore arrays, and the optical collimator is configured to transmit the first optical signal to corresponding optical sensing units in a sensing array of the optical sensor through the plurality of collimating units or micro-pore arrays, respectively.

With reference to the first aspect and the foregoing implementation manner, in another implementation manner of the first aspect, the optical path guiding structure includes a microlens array having a plurality of microlenses and a light blocking layer having a plurality of micropores, where the microlens array is configured to focus the first optical signal to the micropores corresponding to the light blocking layer through the microlenses, respectively, and transmit the first optical signal to the corresponding optical sensing units in the sensing array of the optical sensor through the micropores.

With reference to the first aspect and the foregoing implementation manner, in another implementation manner of the first aspect, in a case that the optical path guiding structure includes a microlens array having a plurality of microlenses and a light blocking layer having a plurality of micropores, the optical sensor is configured to receive optical signals in a plurality of directions, where the optical signals in the plurality of directions include optical signals perpendicular to the display screen and/or optical signals oblique to the display screen.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the fingerprint identification device further includes: and the processor is used for determining whether the finger is a real finger or not according to the light intensity of the first optical signal received by the first sensing area.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, if the light intensity of the first optical signal received by the first sensing region is greater than or equal to a preset value, the processor is further configured to determine that the finger is a true finger; and if the light intensity of the first optical signal received by the first sensing area is smaller than the preset value, the processor is further used for determining that the finger is a fake finger.

In a second aspect, an electronic device is provided, comprising: the fingerprint identification device according to the first aspect or any possible implementation manner of the first aspect, the display screen, and the processor, wherein the display screen is configured to display an image, and the display screen includes a fingerprint detection area, and the fingerprint detection area includes a first light emitting area and a second light emitting area; the processor is configured to: and performing fingerprint anti-counterfeiting authentication on the finger according to the first optical signal received by the first sensing area included by the optical sensor.

Therefore, according to the electronic device provided by the embodiment of the application, the fingerprint detection area is provided with a part of non-luminous area, the real finger can have transmission light in the part, and the 2D false fingerprint has no transmission light, so that the real finger and the 2D false fingerprint can be identified according to the light intensity of the optical signal received by the sensing area corresponding to the non-luminous area in the fingerprint identification device, namely, the attack of the 2D false fingerprint can be well defended by utilizing the difference of the light intensity, and the safety of optical fingerprint identification can be further ensured.

With reference to the second aspect, in an implementation manner of the second aspect, if the light intensity of the first optical signal received by the first sensing region is greater than or equal to a preset value, the processor is further configured to determine that the finger is a true finger; and if the light intensity of the first optical signal received by the first sensing area is smaller than the preset value, the processor is further used for determining that the finger is a fake finger.

With reference to the second aspect and the foregoing implementation manner of the second aspect, in another implementation manner of the second aspect, the optical sensor includes a second sensing area corresponding to the second light emitting area, and the processor is further configured to: and according to the first optical signal received by the second sensing area, performing fingerprint identification on the finger.

With reference to the second aspect and the foregoing implementation manner of the second aspect, in another implementation manner of the second aspect, the processor is further configured to: and fingerprint identification is carried out on the finger according to a second optical signal received by the optical sensor, wherein the second optical signal is an optical signal which is guided into the optical sensor through the optical path guide structure in a second return optical signal, and the second return optical signal is an optical signal which returns after the light-emitting display pixels in the first light-emitting area and the second light-emitting area emit light and irradiate the finger.

In a third aspect, a method for fingerprint anti-counterfeiting is provided, which includes: the method comprises the steps of acquiring a first optical signal of a finger touching a fingerprint detection area of a display screen, wherein the fingerprint detection area comprises a first light-emitting area and a second light-emitting area, a fingerprint identification device is arranged below the display screen and comprises an optical path guiding structure and an optical sensor, the first optical signal is an optical signal which is guided into the optical sensor through the optical path guiding structure in a first return optical signal, the first return optical signal is an optical signal which returns after a light-emitting display pixel in the first light-emitting area does not emit light and a light-emitting display pixel in the second light-emitting area irradiates the finger, and the optical sensor comprises a first sensing area corresponding to the first light-emitting area; and performing fingerprint anti-counterfeiting authentication on the finger according to the first optical signal received by the first sensing area.

Therefore, the fingerprint anti-counterfeiting method provided by the embodiment of the application is applied to electronic equipment comprising a fingerprint identification device under a screen, the electronic equipment is provided with a part of non-luminous area in a fingerprint detection area, a real finger can have transmission light in the part, and a 2D false fingerprint does not have transmission light, so that the real finger and the 2D false fingerprint can be identified according to the light intensity of an optical signal received by a sensing area corresponding to the non-luminous area in the fingerprint identification device, namely, the attack of the 2D false fingerprint can be well defended by utilizing the difference of the light intensity, and the safety of optical fingerprint identification can be further ensured.

With reference to the third aspect, in an implementation manner of the third aspect, the performing anti-counterfeit authentication on the fingerprint of the finger according to the first optical signal received by the first sensing area includes: if the light intensity of the first optical signal received by the first sensing area is greater than or equal to a preset value, determining that the finger is a true finger; and if the light intensity of the first optical signal received by the first sensing area is smaller than the preset value, determining that the finger is a fake finger.

With reference to the third aspect and the foregoing implementation manner of the third aspect, in another implementation manner of the third aspect, the optical sensor includes a second sensing region corresponding to the second light emitting region, and the method further includes: and according to the first optical signal received by the second sensing area, performing fingerprint identification on the finger.

With reference to the third aspect and the foregoing implementation manner of the third aspect, in another implementation manner of the third aspect, the method further includes: acquiring a second optical signal of the finger, wherein the second optical signal is an optical signal which is guided into the optical sensor after passing through the optical path guide structure in a second return optical signal, and the second return optical signal is an optical signal which returns after the light-emitting display pixels in the first light-emitting area and the second light-emitting area emit light and irradiate the finger; and fingerprint identification is carried out on the finger according to the second optical signal received by the optical sensor.

In a fourth aspect, an electronic device is provided, comprising: a storage unit to store instructions and a processor to execute the memory-stored instructions, and when the processor executes the memory-stored instructions, the execution causes the processor to perform the method of the third aspect or any possible implementation of the third aspect.

In a fifth aspect, there is provided a computer readable medium for storing a computer program comprising instructions for performing the method of the third aspect or any possible implementation manner of the third aspect.

In a sixth aspect, there is provided a computer program product comprising instructions which, when executed by a computer, cause the computer to perform the fingerprint identification and anti-counterfeiting method of the third aspect or any possible implementation manner of the third aspect. In particular, the computer program product may be run on the electronic device of the fourth aspect described above.

Drawings

Fig. 1 is a schematic configuration diagram of an electronic apparatus to which the present application can be applied.

Fig. 2 is a schematic cross-sectional view of the electronic device shown in fig. 1.

Fig. 3 is another schematic block diagram of an electronic device to which the present application may be applied.

Fig. 4 is a schematic cross-sectional view of the electronic device shown in fig. 3.

Fig. 5 is a schematic diagram of an optical path resulting from light irradiation of a real finger touching the electronic device.

FIG. 6 is a schematic diagram of the optical path created by a 2D fake finger illuminating the surface of an electronic device.

Fig. 7 is a schematic side view of an electronic device according to an embodiment of the present application during fingerprint detection.

Fig. 8 is a schematic front view of an electronic device of an embodiment of the present application.

FIG. 9 is a schematic diagram of a 2D fake finger fingerprinting on an electronic device according to an embodiment of the application.

Fig. 10 is a schematic diagram of the shape and position of the fingerprint detection area and the first light-emitting area included therein according to the embodiment of the present application.

Fig. 11 is a schematic diagram of colors of a fingerprint detection area and a first light-emitting area included in the fingerprint detection area according to an embodiment of the present application.

Fig. 12 is a schematic view of a fingerprint detection area for fingerprint identification and fingerprint anti-counterfeiting according to an embodiment of the application.

Fig. 13 is a schematic diagram of two fingerprint detection areas for fingerprint identification and fingerprint anti-counterfeiting respectively according to an embodiment of the application.

Fig. 14 is a schematic flow chart of a method for fingerprint anti-counterfeiting according to an embodiment of the application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various electronic devices. Such as portable or mobile computing devices, e.g., smart phones, laptops, tablets, gaming devices, etc., and other electronic devices, e.g., electronic databases, automobiles, Automated Teller Machines (ATMs), etc. However, the present embodiment is not limited thereto.

The technical scheme of the embodiment of the application can be used for the biological feature recognition technology. The biometric technology includes, but is not limited to, fingerprint recognition, palm print recognition, iris recognition, face recognition, and living body recognition. For convenience of explanation, the fingerprint identification technology is described as an example below.

The technical scheme of the embodiment of the application can be used for the under-screen fingerprint identification technology and the in-screen fingerprint identification technology.

Fingerprint identification technique is installed in the display screen below with fingerprint identification module under the screen to realize carrying out the fingerprint identification operation in the display area of display screen, need not set up the fingerprint collection region in the positive region except that the display area of electronic equipment. Specifically, the fingerprint identification module uses the light that returns from the top surface of electronic equipment's display module to carry out fingerprint response and other response operations. This returned light carries information about objects (e.g., fingers) in contact with or in proximity to the top surface of the display assembly, and the fingerprint recognition module located below the display assembly performs underscreen fingerprint recognition by capturing and detecting this returned light. The fingerprint identification module can be designed to realize desired optical imaging by properly configuring an optical element for collecting and detecting returned light, so as to detect fingerprint information of the finger.

Correspondingly, (In-display) fingerprint identification technique means installs inside the display screen fingerprint identification module or partial fingerprint identification module In the screen to realize carrying out the fingerprint identification operation In the display area of display screen, need not set up the fingerprint collection region In the positive region except that the display area of electronic equipment.

Fig. 1 to 4 are schematic views showing an electronic device to which the embodiment of the present application can be applied. Fig. 1 and 3 are schematic orientation diagrams of theelectronic device 10, and fig. 2 and 4 are schematic cross-sectional diagrams of theelectronic device 10 shown in fig. 1 and 3, respectively.

Referring to fig. 1 to 4, theelectronic device 10 may include adisplay 120 and an opticalfingerprint identification module 130.

Thedisplay 120 may be a self-luminous display, which uses display units with self-luminous properties as display pixels. For example, thedisplay screen 120 may be an Organic Light-Emitting Diode (OLED) display screen or a Micro-LED (Micro-LED) display screen. In other alternative embodiments, theDisplay 120 may also be a Liquid Crystal Display (LCD) or other passive light emitting Display, which is not limited in this embodiment of the present application. Further, thedisplay screen 120 may also be specifically a touch display screen, which not only can perform image display, but also can detect a touch or pressing operation of a user, thereby providing a human-computer interaction interface for the user. For example, in one embodiment, theelectronic device 10 may include a Touch sensor, which may be embodied as a Touch Panel (TP), which may be disposed on a surface of thedisplay screen 120, or may be partially or wholly integrated within thedisplay screen 120, thereby forming the Touch display screen.

Optical fingerprint module 130 includes an optical fingerprint sensor that includes asensing array 133 having a plurality of optical sensing elements 131 (which may also be referred to as optical sensing pixels, light sensing pixels, pixel cells, etc.). The sensing area where thesensing array 133 is located or the sensing area thereof is the sensing area of theoptical fingerprint module 130, which corresponds to the fingerprint detection area 103 (also called fingerprint collection area, fingerprint identification area, etc.) on thedisplay screen 120. For example, theoptical sensing unit 131 may be a Photo detector, that is, thesensing array 133 may be a Photo detector (Photo detector) array, which includes a plurality of Photo detectors distributed in an array.

Theoptical fingerprint module 130 may be disposed in a local area below thedisplay screen 120.

With continued reference to fig. 1, thefingerprint detection area 103 may be located in the display area of thedisplay screen 120, but the sensing area of theoptical fingerprint module 130 may or may not be in the display area of thedisplay screen 120. In an alternative embodiment, theoptical fingerprint module 130 may be disposed at other positions, such as the side of thedisplay screen 120 or the edge opaque area of theelectronic device 10, that is, the sensing area of theoptical fingerprint module 130 may be located in any area of theelectronic device 10, and the optical path is designed to guide the optical signal from at least a portion of the display area of thedisplay screen 120 to the sensing area of theoptical fingerprint module 130, so that thefingerprint detection area 103 touched by a finger is actually located in the display area of thedisplay screen 120, and the sensing area of theoptical fingerprint module 130 may or may not be in the display area of thedisplay screen 120.

For theelectronic device 10, when a user needs to unlock or perform other fingerprint verification on theelectronic device 10, the user only needs to press a finger on thefingerprint detection area 103 of thedisplay screen 120, so as to realize fingerprint input. Since fingerprint detection can be implemented in the screen, theelectronic device 10 with the above structure does not need to reserve a special space on the front surface thereof to set a fingerprint key (such as a Home key), so that a full-screen scheme can be adopted, that is, the display area of thedisplay screen 120 can be substantially extended to the front surface of the wholeelectronic device 10.

With continued reference to fig. 2, theoptical fingerprint module 130 may include alight detection portion 134 and anoptical assembly 132. Thelight detecting portion 134 includes the sensing array 133 (also referred to as an optical fingerprint sensor) and a reading circuit and other auxiliary circuits electrically connected to thesensing array 133, which can be fabricated on a chip (Die) by a semiconductor process, such as an optical imaging chip or an optical fingerprint sensor. Theoptical assembly 132 may be disposed above thesensing array 133 of thelight detecting portion 134, and may specifically include a Filter (Filter) for filtering out ambient light penetrating through the finger, a light guiding layer or a light path guiding structure for guiding reflected light reflected from the surface of the finger to thesensing array 133 for optical detection, and other optical elements.

In some embodiments of the present application, theoptical assembly 132 may be packaged with the same optical fingerprint component as thelight detection portion 134. For example, theoptical component 132 may be packaged in the same optical fingerprint chip as theoptical detection portion 134, or theoptical component 132 may be disposed outside the chip where theoptical detection portion 134 is located, for example, theoptical component 132 is attached to the chip, or some components of theoptical component 132 are integrated into the chip.

In some embodiments of the present application, the area or the light sensing range of thesensing array 133 of theoptical fingerprint module 130 corresponds to thefingerprint detection area 103 of theoptical fingerprint module 130. Thefingerprint detection area 103 of the optical fingerprint module 130 (or thefingerprint detection area 103 on the display screen 120) may be equal to or not equal to the area or the light sensing range of the area where thesensing array 133 of theoptical fingerprint module 130 is located, which is not specifically limited in this embodiment of the application.

For example, the light path is guided by the light collimation method, and thefingerprint detection area 103 of theoptical fingerprint module 130 may be designed to be substantially consistent with the area of the sensing array of theoptical fingerprint module 130.

For another example, for example, by using an optical path design such as lens imaging, a reflective folded optical path design, or other optical path designs such as light convergence or reflection, the area of thefingerprint detection area 103 of theoptical fingerprint module 130 may be larger than the area of thesensing array 133 of theoptical fingerprint module 130.

The following is an exemplary description of the optical path guiding structure that theoptical component 132 may include.

Optionally, taking the optical Collimator with the through hole array having the high aspect ratio as an example, the optical Collimator may specifically be a Collimator (collimater) layer made on a semiconductor silicon wafer, and the optical Collimator has a plurality of collimating units or micro holes, the collimating units may specifically be micro holes, in reflected light reflected from a finger, light perpendicularly incident to the collimating units may pass through and be received by sensor chips below the collimating units, and light with an excessively large incident angle is attenuated by multiple reflections inside the collimating units, so that each sensor chip can basically only receive reflected light reflected by fingerprint lines directly above the sensor chip, and image resolution can be effectively improved, and fingerprint identification effect is improved.

Alternatively, taking the optical path design of the optical Lens adopted by the optical path guiding structure as an example, the optical path guiding structure may be an optical Lens (Lens) layer having one or more Lens units, such as a Lens group consisting of one or more aspheric lenses, for converging the reflected light reflected from the finger to thesensing array 133 of thelight detecting portion 134 therebelow, so that thesensing array 133 may perform imaging based on the reflected light, thereby obtaining the fingerprint image of the finger. Further, the optical lens layer may further be formed with a pinhole or a micropore diaphragm in the optical path of the lens unit, for example, one or more light-shielding sheets may be formed in the optical path of the lens unit, wherein at least one light-shielding sheet may be formed with a light-transmitting micropore in the optical axis or the optical central region of the lens unit, and the light-transmitting micropore may serve as the pinhole or the micropore diaphragm. The pinhole or the micro-aperture diaphragm can cooperate with the optical lens layer and/or other optical film layers above the optical lens layer to enlarge the field of view of theoptical fingerprint module 130, so as to improve the fingerprint imaging effect of theoptical fingerprint module 130.

Alternatively, taking the example of the optical path design in which the optical path guiding structure employs a Micro-Lens (Micro-Lens) layer, the optical path guiding structure may be a Micro-Lens array formed by a plurality of Micro-lenses, which may be formed above thesensing array 133 of thelight detecting portion 134 through a semiconductor growth process or other processes, and each Micro-Lens may correspond to one or more sensing units of thesensing array 133, respectively. And other optical film layers, such as a dielectric layer or a passivation layer, can be formed between the microlens layer and the sensing unit. More specifically, a light blocking layer (or called a light blocking layer, etc.) having micro holes (or called open holes) may be further included between the microlens layer and the sensing unit, wherein the micro holes are formed between the corresponding microlenses and the sensing unit, and the light blocking layer may block optical interference between adjacent microlenses and the sensing unit, and enable light corresponding to the sensing unit to be converged into the micro holes through the microlenses and transmitted to the sensing unit through the micro holes for optical fingerprint imaging; or, by adjusting the position of the light blocking layer or the position of the micro-holes included in the light blocking layer, oblique optical signals in multiple directions reflected by a finger above thedisplay screen 120 are converged by the micro-lens layer, and then transmitted to the plurality of sensing units respectively through the holes arranged in at least one light blocking layer, where the oblique optical signals are used to detect fingerprint information of the finger. That is, thesensing array 133 of the underlyinglight detecting portion 134 can receive light signals of multiple directions, which may include light signals perpendicular to the display screen and/or light signals inclined with respect to the display screen, through the arranged microlens array and the light blocking layer having a plurality of micro holes, and embodiments of the present application are not limited thereto.

It should be understood that several of the implementations described above for the optical path directing structure may be used alone or in combination.

For example, a microlens layer may be further disposed above or below the collimator layer or the optical lens layer. Of course, when the collimator layer or the optical lens layer is used in combination with the microlens layer, the specific lamination structure or optical path thereof may need to be adjusted according to actual needs.

On the other hand, theoptical assembly 132 may further include other optical elements, such as a Filter (Filter) or other optical film, which may be disposed between the optical path guiding structure and the optical fingerprint sensor or between thedisplay screen 120 and the optical path guiding structure, and mainly used for isolating the influence of external interference light on the optical fingerprint detection. The filter layer may be configured to filter ambient light that penetrates through a finger and enters the optical fingerprint sensor through thedisplay screen 120, and similar to the optical path guiding structure, the filter layer may be respectively disposed for each optical fingerprint sensor to filter interference light, or may also cover the plurality of optical fingerprint sensors simultaneously with one large-area filter layer.

Fingerprint identification module 130 may be configured to collect fingerprint information (e.g., fingerprint image information) of a user.

Taking thedisplay screen 120 as an example, the display screen has a self-luminous display unit, such as an Organic Light-Emitting Diode (OLED) display screen or a Micro-LED (Micro-LED) display screen. Theoptical fingerprint module 130 may use a display unit (i.e., an OLED light source) of theOLED display screen 120 located in thefingerprint detection area 103 as an excitation light source for optical fingerprint detection. When thefinger 140 is pressed against thefingerprint detection area 103, thedisplay 120 emits a beam oflight 111 towards thetarget finger 140 above thefingerprint detection area 103, and the light 111 is reflected at the surface of thefinger 140 to form reflected light or scattered light (transmitted light) is formed by scattering through the inside of thefinger 140. In the related patent application, the above-mentioned reflected light and scattered light are collectively referred to as return light for convenience of description. Because the ridges (ridges) 141 and the valleys (valley)142 of the fingerprint have different light reflection capacities, the return light 151 from the ridges and the return light 152 from the valleys of the fingerprint have different light intensities, and after passing through theoptical assembly 132, the return light is received by thesensing array 133 in theoptical fingerprint module 130 and converted into corresponding electric signals, i.e., fingerprint detection signals; fingerprint image data can be obtained based on the fingerprint detection signal, and fingerprint matching verification can be further performed, so that an optical fingerprint identification function is realized in theelectronic device 10.

In other alternatives, theoptical fingerprint module 130 may also use an internal light source or an external light source to provide an optical signal for fingerprint detection and identification. In this case, theoptical fingerprint module 130 may be applied to not only a self-luminous display screen such as an OLED display screen, but also a non-self-luminous display screen such as a liquid crystal display screen or other passive luminous display screens.

Taking an application to a liquid crystal display screen with a backlight module and a liquid crystal panel as an example, to support the underscreen fingerprint detection of the liquid crystal display screen, the optical fingerprint system of theelectronic device 10 may further include an excitation light source for optical fingerprint detection, where the excitation light source may specifically be an infrared light source or a light source of non-visible light with a specific wavelength, and may be disposed below the backlight module of the liquid crystal display screen or in an edge area below a protective cover plate of theelectronic device 10, and theoptical fingerprint module 130 may be disposed below the edge area of the liquid crystal panel or the protective cover plate and guided through a light path so that the fingerprint detection light may reach theoptical fingerprint module 130; alternatively, theoptical fingerprint module 130 may be disposed below the backlight module, and the backlight module may open holes or perform other optical designs on film layers such as a diffusion sheet, a brightness enhancement sheet, and a reflection sheet to allow the fingerprint detection light to pass through the liquid crystal panel and the backlight module and reach theoptical fingerprint module 130. When theoptical fingerprint module 130 is used to provide an optical signal for fingerprint detection by using an internal light source or an external light source, the detection principle is consistent with the above description.

In a specific implementation, theelectronic device 10 may further include a transparent protective cover, which may be a glass cover or a sapphire cover, located above thedisplay screen 120 and covering the front surface of theelectronic device 10. Therefore, in the embodiment of the present application, the pressing of the finger on thedisplay screen 120 actually means pressing on the cover plate above thedisplay screen 120 or the surface of the protective layer covering the cover plate.

On the other hand,optics fingerprint module 130 can only include an optics fingerprint sensor, and the area of thefingerprint detection area 103 ofoptics fingerprint module 130 is less and the rigidity this moment, therefore the user need press the finger to the specific position offingerprint detection area 103 when carrying out the fingerprint input, otherwiseoptics fingerprint module 130 probably can't gather the fingerprint image and cause user experience not good. In other alternative embodiments, theoptical fingerprint module 130 may specifically include a plurality of optical fingerprint sensors. A plurality of optics fingerprint sensor can set up side by side through the concatenation mode the below ofdisplay screen 120, just a plurality of optics fingerprint sensor's induction area constitutes jointlyoptics fingerprint module 130's sensing area, this sensing area is corresponding to thefingerprint detection area 103 ofdisplay screen 120. Thereby thefingerprint detection area 103 thatoptical fingerprint module 130 corresponds can extend to the main area of the lower half of display screen, extend to the finger and press the region conventionally promptly to realize blind formula fingerprint input operation of pressing. Further, when the number of the optical fingerprint sensors is sufficient, thefingerprint detection area 103 may also be extended to a half display area or even the entire display area, thereby realizing half-screen or full-screen fingerprint detection.

Referring to fig. 3 and 4, theoptical fingerprint module 130 in theelectronic device 10 may include a plurality of optical fingerprint sensors, the plurality of optical fingerprint sensors may be arranged below thedisplay screen 120 side by side in a manner such as splicing, and sensing areas of the plurality of optical fingerprint sensors jointly form thefingerprint detection area 103 of theoptical fingerprint device 130.

Further, theoptical assembly 132 may include a plurality of optical path guiding structures, each of which corresponds to one optical fingerprint sensor (i.e., the sensing array 133) and is attached above the corresponding optical fingerprint sensor. Alternatively, the plurality of optical fingerprint sensors may share an integral optical path directing structure, i.e. the optical path directing structure has an area large enough to cover the sensing array of the plurality of optical fingerprint sensors.

For example, taking the optical collimator of theoptical assembly 132 with a through hole array having a high aspect ratio as an example, when theoptical fingerprint module 130 includes a plurality of optical fingerprint sensors, one or more collimating units may be configured for one optical sensing unit in the optical sensing array of each optical fingerprint sensor, and the collimating units are disposed above the corresponding optical sensing units. Of course, the plurality of optical sensing units may also share one collimating unit, i.e. the one collimating unit has a sufficiently large aperture to cover the plurality of optical sensing units. Because a collimation unit can correspond a plurality of optical sensing units or an optical sensing unit corresponds a plurality of collimation units, the spatial period ofdisplay screen 120 and optical fingerprint sensor's spatial period's correspondence has been destroyed, therefore, even the spatial structure of the luminous display array ofdisplay screen 120 and optical fingerprint sensor's optical sensing array's spatial structure are similar, also can effectively avoidoptical fingerprint module 130 to utilize the optical signal throughdisplay screen 120 to carry out fingerprint imaging and generate moire fringe,optical fingerprint module 130's fingerprint identification effect has effectively been improved.

For another example, taking the optical lens as an example of theoptical component 132, when theoptical fingerprint module 130 includes a plurality of sensor chips, one optical lens may be configured for each sensor chip to perform fingerprint imaging, or one optical lens may be configured for a plurality of sensor chips to implement light convergence and fingerprint imaging. Even when one sensor chip has two sensing arrays (Dual Array) or multiple sensing arrays (Multi-Array), two or more optical lenses can be configured for the sensor chip to cooperate with the two or more sensing arrays for optical imaging, so as to reduce the imaging distance and enhance the imaging effect.

It should be understood that fig. 1-4 are only examples of the present application and should not be construed as limiting the present application.

For example, the number, size and arrangement of the fingerprint sensors are not specifically limited, and may be adjusted according to actual requirements. For example, theoptical fingerprint module 130 may include a plurality of fingerprint sensors distributed in a square or circle.

In consideration of the fact that the optical fingerprint principle is easier to crack than a capacitive fingerprint, especially the 2D printing/extraction false fingerprint which is low in cost and easy to obtain has greater threat to the optical fingerprint. At present, the method for resisting by using the color of the false fingerprint can solve the problem of false fingerprints with different colors from the color of a real finger, but the anti-counterfeiting effect of flesh color similar to the color of the real finger or reddish false fingerprints is poor, so a new 2D false fingerprint anti-counterfeiting method is required to be found.

Specifically, as shown in fig. 5, still taking theelectronic device 10 shown in fig. 1 to 4 as an example, when areal finger 140 touches thefingerprint detection area 103 on thedisplay screen 120, assuming that thedisplay screen 120 includes light-emitting display pixels for providing a light source for fingerprint identification, after the light emitted by the display screen 120 (i.e., the incident light indicated by the solid line in fig. 5) illuminates thefinger 140, reflection and transmission may occur at the fingerprint ridge and fingerprint valley of the surface of thefinger 140, and the reflected light indicated by the dashed line and the transmitted light indicated by the dashed-dotted line in fig. 5 correspondingly occur, that is, the light that can be received by theoptical fingerprint module 130 may include the reflected light of the surface of the finger and the transmitted light inside the finger.

However, as shown in fig. 6, if a real finger does not touch thefingerprint detection area 103 on thedisplay screen 120 for fingerprint identification, but a 2D fake finger touches thefingerprint detection area 103, the 2D fake finger is a plane, and it is still assumed that thedisplay screen 120 includes light-emitting display pixels for providing a light source for fingerprint identification, and then the light emitted by the light-emitting display pixels irradiates the fake finger, and only reflected light is generated, that is, the light that theoptical fingerprint module 130 can receive includes the reflected light from the fake fingerprint itself, but not transmitted light.

Therefore, for a real finger and a 2D false fingerprint, the real and false can be distinguished according to the principle of whether the transmitted light exists or not. However, after the light-emitting display pixels emit light in thefingerprint detection area 103 of thedisplay screen 120, the generated reflected light and transmitted light are mixed together and cannot be extracted separately, so that the principle of distinctiveness is not available. Therefore, the embodiment of the application provides a fingerprint anti-counterfeiting method, a fingerprint identification device and electronic equipment, which perform fingerprint identification and anti-counterfeiting authentication of a fingerprint based on the difference of transmission light of a real finger and a 2D false fingerprint.

FIG. 7 is a partial schematic diagram illustrating anelectronic device 20 according to an embodiment of the application, and FIG. 7 is a side view of theelectronic device 20; fig. 8 illustrates a front view of theelectronic device 20 according to an embodiment of the application. As shown in fig. 7 and 8, theelectronic device 20 includes adisplay 200 and afingerprint recognition device 300, and thedisplay 200 is located above thefingerprint recognition device 300.

Specifically, thedisplay screen 200 of FIG. 7 may represent a portion of thedisplay screen 200, rather than the actual size and dimensions of thedisplay screen 200; fig. 8 shows a front view of thedisplay screen 200. Thedisplay screen 200 may correspond to thedisplay screen 120 in theelectronic device 10 described in fig. 1 and fig. 2, and is applicable to the description related to thedisplay screen 120, and for brevity, will not be described again.

In addition, theelectronic device 20 of the embodiment of the present application is described by taking as an example that thedisplay screen 200 includes several light-emitting display pixels capable of self-emitting light, which can be used for displaying images. As shown in fig. 7 and 8, thedisplay screen 200 includes afingerprint detection area 210 for finger pressing, that is, when a user needs to unlock or otherwise identify theelectronic device 20, the user only needs to press a finger on thefingerprint detection area 210 to input a fingerprint. Thefingerprint detection area 210 may correspond to thefingerprint detection area 103 in theelectronic device 10 described in fig. 1 to 4, and is suitable for the above description related to thefingerprint detection area 103, and for brevity, no further description is provided here.

In the embodiment of the present application, as shown in fig. 8, thedisplay screen 200 includes a plurality of light emitting display pixels, thedisplay screen 200 includes afingerprint detection area 210, thefingerprint detection area 210 further includes a firstlight emitting area 211 and a secondlight emitting area 212, and the firstlight emitting area 211 and the secondlight emitting area 212 do not overlap.

It should be understood that thefingerprint recognition device 300 is disposed below thedisplay screen 200 of theterminal device 20 in the embodiment of the present application, and thefingerprint recognition device 300 may be used to receive the optical signal returned by the finger. Specifically, thefingerprint recognition device 300 may include: an optical path guide structure and an optical sensor disposed below the optical path guide structure.

Specifically, the optical path guiding structure is configured to: guiding a first light signal, which is returned after the light-emitting display pixels in the first light-emittingregion 211 do not emit light and the light emitted by the light-emitting display pixels in the second light-emittingregion 212 irradiates the finger, to the optical sensor, out of first return light signals; the optical sensor is used for: receiving the first optical signal, wherein the optical sensor comprises a first sensing area corresponding to the first light-emitting area, and the first optical signal received by the first sensing area is used for fingerprint anti-counterfeiting authentication.

That is, in the case where the light emitting display pixels in the firstlight emitting region 211 in thefingerprint detection region 210 do not emit light and the light emitting display pixels in the secondlight emitting region 212 emit light, the light irradiates the finger to generate a first return light signal, a part of which is guided through the optical path and transmitted to the optical sensor, and a part of which is blocked by the optical path guide structure and cannot be transmitted to the optical sensor. The portion of the first return optical signal that can be transmitted to the optical sensor is referred to as a first optical signal, that is, the first optical signal is guided to the optical sensor after passing through the optical path guiding structure, a sensing region of the optical sensor includes a first sensing region corresponding to the first light-emittingregion 211, and the portion of the first optical signal that is received by the first sensing region can be used for anti-counterfeit authentication of a fingerprint.

Specifically, as shown in fig. 7, assuming that the finger touching thefingerprint detection area 210 is a real finger, the light emitted by the illuminated second light emitting area returns after propagating through the finger, and more transmitted light can be received in the first sensing area corresponding to the non-illuminated first light emitting area; however, in the case of a 2D false fingerprint, as shown in fig. 9, light received by the first sensing region corresponding to the first light-emitting region mainly depends on the self-reflection of the false fingerprint, and no or only a very small amount of light can be received at the position of the first sensing region under the action of the oblique receiving optical path or the vertical receiving optical path. That is, for the intensity of the light signal received by the first sensing region corresponding to the first light-emittingregion 211 which is not lit, the intensity of the light signal received by the real finger is greater than that of the 2D false fingerprint, so that the real false fingerprint can be distinguished according to the characteristic.

For example, theelectronic device 20 or thefingerprint recognition device 300 may include a processor, and the processor may be used for performing anti-counterfeit authentication of fingerprints. In particular, the processor may be configured to: if the light intensity of the first optical signal received by the first sensing area is greater than or equal to a preset value, determining that the finger touching thefingerprint detection area 210 is a real finger; and if the light intensity of the first optical signal received by the first sensing area is smaller than the preset value, determining that the finger is a fake finger.

It should be understood that thefingerprint identification apparatus 300 of the embodiment of the present application may correspond to the opticalfingerprint identification module 130 in theelectronic device 10 described in fig. 1 to 4, and is applicable to the related description about the opticalfingerprint identification module 130; the optical path guiding structure in thefingerprint identification device 300 may correspond to theoptical component 132 in theelectronic device 10 described in fig. 1 to 4, and is applicable to the related description about theoptical component 132, for example, the optical path guiding structure in theoptical component 132 may specifically correspond to and be applicable to the related description; the optical sensor in thefingerprint identification apparatus 300 may correspond to the optical fingerprint sensor in theelectronic device 10 described in fig. 1 to 4, for example, the optical sensor in thefingerprint identification apparatus 300 may be thelight detection portion 134 in theelectronic device 10, and is applicable to the description related to thelight detection portion 134, and therefore, for brevity, the description thereof is omitted here.

Since the optical path guiding structure in the embodiment of the present application may be used to receive the vertical light signal and/or the oblique light signal, the relative position between the position of thefingerprint detection region 210 and the position of the sensing region of thefingerprint identification device 300 and the area size of the two may be different due to the optical path. For example, if the optical path guiding structure only receives the vertical light signal, thefingerprint detection area 210 may be located right above the sensing area of thefingerprint identification device 300, and the areas of the two areas may be equal; for another example, if the light path guiding structure can receive oblique light from a plurality of different directions, thefingerprint detection area 210 may be located obliquely above the sensing area of thefingerprint identification device 300, and the areas of the two areas may not be equal. In addition, since the relative position between thefingerprint detection area 210 and the sensing area of thefingerprint identification device 300 and the area of the two are not fixed, the relative position and the area of the first light emitting area in thefingerprint detection area 210 and the first sensing area of the optical sensor of thefingerprint identification device 300 may also be different, and the comparison in the embodiments of the present application is not limited.

Alternatively, the shape of thefingerprint detection area 210 in the embodiment of the present application may be set according to practical applications, and may be set to any regular or irregular shape. For example, fig. 8 illustrates thefingerprint detection area 210 as a circle; alternatively, as shown in FIG. 10, thefingerprint detection area 210 may have other shapes, such as a square shape as shown in the first row of FIG. 10.

Similarly, the first light-emittingregion 211 and the second light-emittingregion 212 in the embodiment of the present application may be provided in the same or different arbitrary shapes. Specifically, the shape of the first light-emittingregion 211 is designed reasonably to ensure that strong real finger transmission light is extracted from the corresponding first sensing region, and the 2D artificial fingerprint has weak reflected light signal and no transmission light, i.e. a true-false distinguishing difference is formed. Any spot shape from which this difference can be extracted can be distinguished from true or false. For example, in consideration of various aspects of performance and beauty, the shape of the first light-emittingregion 211 as shown in fig. 8 is preferable, assuming that thefingerprint detection region 210 is circular. For another example, a black portion in fig. 10 indicates the first light-emittingregion 211, wherein the first light-emittingregion 211 may be provided as a single connected region as shown in the four diagrams of the first two rows in fig. 10 and fig. 8; for another example, as shown in the two figures in the last row in fig. 10, the first light-emittingregion 211 may further include a plurality of unconnected regions, for example, a plurality of stripe regions or a plurality of ring regions as shown in fig. 10.

For example, fig. 8 illustrates the first light-emittingregion 211 as a circle and the second light-emittingregion 212 as a ring. For example, as shown in fig. 10, the black portion in each drawing of fig. 10 represents the first light-emittingregion 211, the first light-emittingregion 211 may be circular, square or other shapes, and correspondingly, the second light-emittingregion 212 is the other portion of the fingerprint detection region except for the first light-emittingregion 211.

Alternatively, the relative position of the firstlight emitting area 211 in thefingerprint detection area 210 may be set according to practical applications, and may be set at any position in thefingerprint detection area 210. For example, as shown in fig. 8 and 10, the firstlight emitting area 211 may be located in a central area of thefingerprint detection area 210; alternatively, the first light-emittingregion 211 may be located at an arbitrary position on the edge of thefingerprint detection region 210; alternatively, thefirst regions 211 may also be symmetrically distributed with respect to a center point of thefingerprint detection region 211, and the embodiment of the present application is not limited thereto.

Alternatively, the sizes of the areas of the firstlight emitting region 211 and the secondlight emitting region 212 in the embodiment of the present application may be set according to practical applications. For example, the area of the secondlight emitting region 212 may be set to be greater than or equal to the area of the firstlight emitting region 211. For another example, the area of the first light-emittingregion 211 may be set to be smaller than or equal to the field area of the optical sensor, and the embodiment of the present application is not limited thereto.

Optionally, since the light sources with different colors all have a transmission phenomenon in a real finger, when fingerprint identification or fingerprint anti-counterfeiting authentication is performed, the light-emitting display pixels of the second light-emittingregion 212 emit light, and the color of the light may be set according to practical applications, for example, may be set as a pure color or a gradient color. Considering that the white light source is an R/G/B three-color composite light, so under the superposition of three-color light, the true and false distinction is greater, so the color of the light is preferably white, for example, as shown in the left diagram of fig. 11, the light can be set to be gradually changed white; or may be provided in pure white as shown in the right drawing of fig. 11. In addition to white light, the light sources of other colors may also obtain differences in the transmitted light components of a real finger and a 2D false fingerprint, but the true and false distinctiveness is large and small, and for example, the color of the light emitted by the light-emitting display pixels of the second light-emittingregions 212 to illuminate the finger may be any one of the following colors: pure red, pure green, pure cyan, pure white, gradient green, gradient cyan, and gradient white.

In the embodiment of the present application, thefingerprint identification device 300 can perform anti-counterfeit authentication of a fingerprint under the action of the firstlight emitting area 211 and the secondlight emitting area 212, and in addition, thefingerprint identification device 300 can also be used for fingerprint identification.

Optionally, as a first embodiment, the optical sensor in thefingerprint identification device 300 may further include a second sensing area corresponding to the secondlight emitting area 212, and the first light signal received by the second sensing area is used for fingerprint identification of the finger. That is to say, utilize fingerprint collection process once, just can realize fingerprint identification and fingerprint anti-fake authentication, wherein, to the fingerprint detection area, can divide into two parts and use it, partly be the first luminescent region of non-luminescence, the light signal that the first sensing area that corresponds was gathered is used for fingerprint anti-fake, and another part is luminous second luminescent region, and the light signal that the second sensing area that corresponds was gathered is used for fingerprint formation of image and fingerprint matching.

For example, as shown in fig. 12, assuming that thefingerprint detection area 210 is circular, thefingerprint detection area 210 includes a firstlight emitting area 211 therein, i.e., as shown by a black area B in fig. 12; in addition, thefingerprint detection area 210 includes a secondlight emitting area 212, and the secondlight emitting area 212 may be all or part of thefingerprint detection area 210 except the firstlight emitting area 211, for example, the secondlight emitting area 212 may be a white area a as shown in fig. 12, or may be an area a plus an area C, where the area a and the area C may emit light of the same or different colors, and the area B does not emit light. The optical signal collected by the first sensing area corresponding to the first light emitting area 211 (i.e. area B) is used for anti-counterfeiting of the fingerprint; the light signal collected by the second sensing region corresponding to the second light emitting region 212 (i.e., region a or region a + C) is used for fingerprint recognition.

It is to be understood that, according to the above description, the area, position, shape, and the like of the first light-emittingregion 211 may be arbitrarily set according to the actual application. For example, considering that fingerprint imaging is required in fingerprint recognition, that is, a sufficiently large and effective fingerprint image is obtained, the area of the second light emitting area is generally set to be larger than the area of the first light emitting area. In addition, in order to ensure that fingerprint recognition is performed smoothly, the first light emitting region is usually disposed at an edge position of the fingerprint detection region, but the embodiment of the present invention is not limited thereto.

Optionally, as a second embodiment, the optical path guiding structure in thefingerprint identification device 300 is further configured to: guiding a second light signal of second return light signals returned after the light-emitting display pixels in the first and second light-emitting areas both emit light and irradiate a finger to the optical sensor; the optical sensor in thefingerprint recognition device 300 is further configured to: and receiving the second optical signal, wherein the second optical signal is used for fingerprint identification of the finger. That is to say, utilize fingerprint collection process twice at least, realize fingerprint identification and fingerprint anti-fake authentication, wherein, fingerprint collection realizes fingerprint identification once at least, and fingerprint collection realizes fingerprint anti-fake authentication once at least.

For example, as shown in fig. 13, still assuming that thefingerprint detection area 210 is a circular area, thefingerprint identification device 300 needs to perform two times of collection, one time of fingerprint identification and one time of fingerprint anti-counterfeiting authentication, and the execution sequence of the two can be set arbitrarily. For the process of performing the anti-counterfeit authentication of the fingerprint, as shown in the left diagram of fig. 13, the first light-emittingregion 211 in thefingerprint detection region 210 does not emit light, and the second light-emittingregion 212 emits light, so as to obtain a first light signal; wherein, the first optical signal received by the first sensing area can be used for fingerprint anti-counterfeiting. For the process of performing fingerprint identification authentication, as shown in the right diagram of fig. 13, thefingerprint detection area 210 emits light, that is, the first light-emittingarea 211 and the second light-emittingarea 212 in thefingerprint detection area 210 both emit light, so as to obtain a second light signal, and thefingerprint identification device 300 performs fingerprint identification according to the second light signal.

Alternatively, fig. 13 is only an example, wherein the right diagram of fig. 13 shows a possible lighting manner in the fingerprint identification process, that is, other manners may be adopted for the lighting manner of thefingerprint detection area 210 of the fingerprint identification process shown in the right diagram, for example, other patterns may be adopted for the lighting manner, that is, a partial lighting manner may be adopted for the fingerprint identification process shown in the right diagram of fig. 13; alternatively, multiple fingerprint images may be acquired correspondingly to realize the fingerprint identification process by using multiple polishing modes. In addition, in order to improve the security level of the fingerprint anti-counterfeiting process, fingerprint anti-counterfeiting authentication can be added in the fingerprint identification process, namely the fingerprint identification process of the right image in fig. 13 can be added with the fingerprint anti-counterfeiting authentication process, so that the anti-counterfeiting process of the left image in fig. 13 is reused, at least two times of anti-counterfeiting authentication can be carried out, and the security level is improved. For example, the fingerprint authentication and fingerprint recognition may be performed in the manner shown in fig. 12, and the fingerprint authentication may be performed again in the manner shown in the left diagram of fig. 13, but the embodiment of the present application is not limited thereto.

In addition, according to the above description, the areas, positions, shapes, and the like of thefingerprint detection area 210 and the firstlight emitting area 211 shown in the left figure may also be set according to practical applications, for example, the area of the firstlight emitting area 211 may be set smaller than the area of the field of view of thefingerprint identification device 300 in consideration that the first light signal may not be used for fingerprint identification, that is, it is not necessary to obtain a fingerprint image, but the embodiment of the present application is not limited thereto.

It should be understood that the above first embodiment only needs to collect a fingerprint image once, which is faster and simpler than the second embodiment, but because the fingerprint identification and the fingerprint anti-counterfeiting need to be simultaneously realized by one-time collection, the relationship between the first light-emittingregion 211 and the second light-emittingregion 212 in thefingerprint detection region 210 needs to be reasonably set to ensure the accuracy and precision of the fingerprint identification and the fingerprint anti-counterfeiting; in the second embodiment, at least two times of fingerprint acquisition are required to realize the fingerprint identification process and the fingerprint anti-counterfeiting process, so that the two processes can be more accurate, no or little influence is caused between the two processes, and the position, the area and the like of the first light-emittingarea 211 in thefingerprint detection area 210 are more flexibly set.

It should be understood that, in the embodiment of the present application, thefingerprint identification device 300 uses the self-light emitting display pixels of thedisplay screen 120 as the light sources, that is, the light emitting display pixels included in the firstlight emitting region 211 and the secondlight emitting region 212 included in thefingerprint detection region 210 are the light sources, and besides, thefingerprint identification device 300 may also use other light sources, for example, an external light source as the excitation light source for fingerprint detection. Specifically, for any light source, the light signal emitted by the light source for fingerprint detection forms a corresponding light spot on thedisplay screen 200, and the light spot may correspond to thefingerprint detection area 210 in the embodiment of the present application, and is applicable to the above-mentioned related description about thefingerprint detection area 210, for example, when the firstlight emitting area 211 in thefingerprint detection area 210 does not emit light, it indicates that the corresponding position in the light spot does not emit light, and for the sake of brevity, this is not listed one by one.

Therefore, according to the fingerprint identification device and the electronic device, a part of non-luminous area is arranged in the fingerprint detection area, the transmission light exists in the part of the real finger, and the 2D false fingerprint does not have the transmission light, so that the real finger and the 2D false fingerprint can be identified according to the light intensity of the optical signal received by the sensing area corresponding to the non-luminous area in the fingerprint identification device, namely, the attack of the 2D false fingerprint can be well defended by utilizing the difference of the light intensity, and the safety of optical fingerprint identification can be further ensured.

Fig. 14 shows a schematic flow chart of amethod 400 of fingerprint anti-counterfeiting according to an embodiment of the application. It should be understood that themethod 400 may be performed by an electronic device having a display screen, for example, the electronic device may be theelectronic device 10 or 20 described above, for example, theelectronic device 10 or 20 may include a processor or a processing unit; or a processor or a processing unit may be included in thefingerprinting apparatus 300 of the electronic device for performing themethod 400.

As shown in fig. 14, themethod 400 includes:

s410, acquiring a first optical signal of a finger touching a fingerprint detection area of a display screen, wherein the fingerprint detection area comprises a first light-emitting area and a second light-emitting area, a fingerprint identification device is arranged below the display screen and comprises an optical path guide structure and an optical sensor, the first optical signal is an optical signal which is guided into the optical sensor through the optical path guide structure in a first return optical signal, the first return optical signal is an optical signal which is returned after light emitted by a light-emitting display pixel in the first light-emitting area does not emit light and light emitted by a light-emitting display pixel in the second light-emitting area irradiates the finger, and the optical sensor comprises a first sensing area corresponding to the first light-emitting area;

s420, performing a fingerprint anti-counterfeit authentication on the finger according to the first optical signal received by the first sensing area.

Optionally, as an embodiment, the fingerprint authentication of the finger according to the first optical signal received by the first sensing area includes: if the light intensity of the first optical signal received by the first sensing area is greater than or equal to a preset value, determining that the finger is a true finger; and if the light intensity of the first optical signal received by the first sensing area is smaller than the preset value, determining that the finger is a fake finger.

Optionally, as an embodiment, the optical sensor includes a second sensing region corresponding to the second light emitting region, themethod 400 further includes: and performing fingerprint identification on the finger according to the first optical signal received by the second sensing area.

Optionally, as an embodiment, themethod 400 further includes: acquiring a second optical signal of the finger, wherein the second optical signal is an optical signal which is guided into the optical sensor after passing through the optical path guide structure in a second return optical signal, and the second return optical signal is an optical signal which returns after the light-emitting display pixels in the first light-emitting area and the second light-emitting area emit light and irradiate the finger; and fingerprint identification is carried out on the finger according to the second optical signal received by the optical sensor.

Therefore, the fingerprint anti-counterfeiting method provided by the embodiment of the application is applied to electronic equipment comprising a fingerprint identification device under a screen, the electronic equipment is provided with a part of non-luminous area in a fingerprint detection area, a real finger can have transmission light in the part, and a 2D false fingerprint does not have transmission light, so that the real finger and the 2D false fingerprint can be identified according to the light intensity of an optical signal received by a sensing area corresponding to the non-luminous area in the fingerprint identification device, namely, the attack of the 2D false fingerprint can be well defended by utilizing the difference of the light intensity, and the safety of optical fingerprint identification can be further ensured.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (24)

1. A fingerprint identification device is arranged below a display screen of an electronic device, the display screen comprises a fingerprint detection area, the fingerprint detection area comprises a first light-emitting area and a second light-emitting area, and the fingerprint identification device comprises:

an optical path guiding structure for guiding a first light signal of first return light signals to the optical sensor, the first return light signals being returned after the light-emitting display pixels in the first light-emitting area do not emit light and the light emitted by the light-emitting display pixels in the second light-emitting area irradiates a finger;

the optical sensor is positioned below the optical path guiding structure and used for receiving the first optical signal, the optical sensor comprises a first sensing area corresponding to the first light-emitting area, and the first optical signal received by the first sensing area is used for fingerprint anti-counterfeiting authentication.

2. The fingerprint recognition device of claim 1, wherein the optical sensor includes a second sensing region corresponding to the second light-emitting region, the first light signal received by the second sensing region being used to fingerprint the finger.

3. The fingerprint recognition device of claim 1, wherein the optical path directing structure is further configured to:

guiding a second light signal of second return light signals returned after the light-emitting display pixels in the first and second light-emitting areas both emit light and irradiate a finger to the optical sensor;

the optical sensor is further configured to:

and receiving the second optical signal, wherein the second optical signal is used for fingerprint identification of the finger.

4. The fingerprint recognition device according to any one of claims 1 to 3, wherein the area of the second light emission area is larger than the area of the first light emission area.

5. The fingerprint recognition device according to any one of claims 1 to 4, wherein an area of the first light emitting area is smaller than a field area of the optical sensor.

6. The fingerprint recognition device according to any one of claims 1 to 5, wherein the first light-emitting area is located in a central area or an edge area of the fingerprint detection area.

7. The fingerprint recognition device according to any one of claims 1 to 6, wherein the first region is symmetrically distributed with respect to a center point of the fingerprint detection region.

8. The fingerprint recognition device according to any one of claims 1 to 7, wherein the first light-emitting area is a single connected area.

9. The fingerprint recognition device according to claim 8, wherein the first light-emitting area is square or circular.

10. The fingerprint recognition device according to any one of claims 1 to 7, wherein the first light-emitting area includes a plurality of disconnected areas.

11. The fingerprint recognition device according to claim 10, wherein the first light-emitting area comprises a plurality of stripe-shaped areas or a plurality of ring-shaped areas.

12. The fingerprint recognition device according to any one of claims 1 to 11, wherein the light emitted by the light-emitting display pixels of the second light-emitting area to illuminate the finger is any one of the following colors: pure red, pure green, pure cyan, pure white, gradient green, gradient cyan, and gradient white.

13. The fingerprint recognition device of any one of claims 1-12, wherein the optical path directing structure comprises an optical lens; or,

the optical path guiding structure comprises an optical collimator with a plurality of collimating units or micropore arrays, and the optical collimator is used for transmitting the first optical signal to corresponding optical sensing units in a sensing array of the optical sensor through the plurality of collimating units or micropore arrays respectively; or,

the optical path guiding structure comprises a micro lens array with a plurality of micro lenses and a light blocking layer with a plurality of micropores, wherein the micro lens array is used for focusing the first optical signal to the micropores corresponding to the light blocking layer through the micro lenses respectively and transmitting the first optical signal to the corresponding optical sensing units in the sensing array of the optical sensor through the micropores.

14. The fingerprint recognition device according to claim 13, wherein in the case where the light path directing structure includes a microlens array having a plurality of microlenses and a light blocking layer having a plurality of micro-holes,

the optical sensor is used for receiving light signals in multiple directions, and the light signals in the multiple directions comprise light signals vertical to the display screen and/or light signals inclined relative to the display screen.

15. The fingerprint recognition device according to any one of claims 1 to 14, further comprising:

and the processor is used for determining whether the finger is a real finger or not according to the light intensity of the first optical signal received by the first sensing area.

16. The fingerprint recognition device of claim 15,

if the light intensity of the first optical signal received by the first sensing area is greater than or equal to a preset value, the processor is used for determining that the finger is a true finger;

and if the light intensity of the first optical signal received by the first sensing area is smaller than the preset value, the processor is used for determining that the finger is a fake finger.

17. An electronic device, comprising: the fingerprint recognition device of any one of claims 1-14, a display screen, and a processor,

the display screen is used for displaying images and comprises a fingerprint detection area, and the fingerprint detection area comprises a first light-emitting area and a second light-emitting area;

the processor is configured to: and performing fingerprint anti-counterfeiting authentication on the finger according to the first optical signal received by the first sensing area included by the optical sensor.

18. The electronic device of claim 17,

if the light intensity of the first optical signal received by the first sensing area is greater than or equal to a preset value, the processor is used for determining that the finger is a true finger;

and if the light intensity of the first optical signal received by the first sensing area is smaller than the preset value, the processor is used for determining that the finger is a fake finger.

19. The electronic device of claim 17 or 18, wherein the optical sensor comprises a second sensing region corresponding to the second light emitting region,

the processor is further configured to:

and according to the first optical signal received by the second sensing area, performing fingerprint identification on the finger.

20. The electronic device of claim 17 or 18, wherein the processor is further configured to:

and fingerprint identification is carried out on the finger according to a second optical signal received by the optical sensor, wherein the second optical signal is an optical signal which is guided into the optical sensor through the optical path guide structure in a second return optical signal, and the second return optical signal is an optical signal which returns after the light-emitting display pixels in the first light-emitting area and the second light-emitting area emit light and irradiate the finger.

21. A method for fingerprint anti-counterfeiting, comprising:

the method comprises the steps of acquiring a first optical signal of a finger touching a fingerprint detection area of a display screen, wherein the fingerprint detection area comprises a first light-emitting area and a second light-emitting area, a fingerprint identification device is arranged below the display screen and comprises an optical path guiding structure and an optical sensor, the first optical signal is an optical signal which is guided into the optical sensor through the optical path guiding structure in a first return optical signal, the first return optical signal is an optical signal which returns after a light-emitting display pixel in the first light-emitting area does not emit light and a light-emitting display pixel in the second light-emitting area irradiates the finger, and the optical sensor comprises a first sensing area corresponding to the first light-emitting area;

and performing fingerprint anti-counterfeiting authentication on the finger according to the first optical signal received by the first sensing area.

22. The method of claim 21, wherein the anti-counterfeit authenticating the finger based on the first light signal received by the first sensing region comprises:

if the light intensity of the first optical signal received by the first sensing area is greater than or equal to a preset value, determining that the finger is a true finger;

and if the light intensity of the first optical signal received by the first sensing area is smaller than the preset value, determining that the finger is a fake finger.

23. The method of claim 21 or 22, wherein the optical sensor comprises a second sensing region corresponding to the second light emitting region,

the method further comprises the following steps:

and according to the first optical signal received by the second sensing area, performing fingerprint identification on the finger.

24. The method according to claim 21 or 22, further comprising:

acquiring a second optical signal of the finger, wherein the second optical signal is an optical signal which is guided into the optical sensor after passing through the optical path guide structure in a second return optical signal, and the second return optical signal is an optical signal which returns after the light-emitting display pixels in the first light-emitting area and the second light-emitting area emit light and irradiate the finger;

and fingerprint identification is carried out on the finger according to the second optical signal received by the optical sensor.

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