TW202103044A - Fingerprint identification device and fingerprint identification method - Google Patents

Abstract

A fingerprint identification device and a fingerprint identification method are provided. The fingerprint identification device includes a self-emitting display panel, a fingerprint sensor and a processor. The self-emitting display panel displays at least one light pattern in a sensing region. The fingerprint sensor senses a finger object located above the sensing region of the self-emitting display panel to generate a first fingerprint image and a second fingerprint image corresponding to the at least one light pattern. The processor is coupled to the fingerprint sensor. The processor determines whether the first fingerprint image and the second fingerprint image have opposite tones to identify the finger object is a real finger or a fake finger.

Description

Fingerprint identification device and fingerprint identification method

The present invention relates to an identification technology, and in particular relates to a fingerprint identification device and a fingerprint identification method suitable for an under-display fingerprint sensing architecture (under-display fingerprint sensing architecture).

In recent years, the demand for fingerprint sensing has gradually increased. In order to reduce the volume of the display device, the fingerprint sensing area may overlap with the display area of the display device. For example, the under-screen fingerprint recognition technology is to configure/attach the fingerprint sensor under the display panel (on the back surface of the display panel), and the fingerprint sensor can sense/capture fingerprint images through the display panel. However, conventional off-screen fingerprint recognition technology cannot effectively identify the difference between a real fingerprint and a fake fingerprint (such as a printed two-dimensional image or a fake finger with only a flat fingerprint pattern). Therefore, a solution is provided in the following embodiments of the present disclosure.

The present disclosure relates to a fingerprint identification device and a fingerprint identification method, and the fingerprint identification device and the fingerprint identification method can identify whether a finger is a real finger or a fake finger.

The fingerprint identification device of the present disclosure includes a self-luminous display panel, a fingerprint sensor, and a processor. The self-luminous display panel is used for displaying at least one luminous pattern in the sensing area. The fingerprint sensor is used to sense a finger located above the sensing area of the self-luminous display panel to generate a first fingerprint image and a second fingerprint image corresponding to at least one light-emitting pattern. The processor is coupled to the fingerprint sensor. The processor is used to determine whether the first fingerprint image and the second fingerprint image have opposite tones, so as to identify whether the finger is a real finger or a fake finger.

The fingerprint identification method of the present disclosure includes the following steps: displaying at least one light-emitting pattern in the sensing area of the self-luminous display panel; and sensing a finger located above the sensing area of the self-luminous display panel through the fingerprint sensor to generate a corresponding And determining whether the first fingerprint image and the second fingerprint image have opposite tones to identify whether the finger is a real finger or a fake finger.

Based on the above, the fingerprint identification device and fingerprint identification method of the present disclosure can effectively identify whether the finger is a real finger or a fake finger by capturing two fingerprint images from a finger and determining whether the two fingerprint images have opposite tones, thereby providing effective Fingerprint recognition function.

In order to make the above-mentioned features and advantages of the present disclosure more comprehensible, the following specific examples are given in conjunction with the accompanying drawings to describe in detail as follows.

In order to make the content of the present disclosure more comprehensible, the following embodiments are specifically cited as examples on which the present disclosure can indeed be implemented. In addition, wherever possible, elements/components/steps with the same reference numbers in the drawings and embodiments represent the same or similar parts.

It should be understood that other embodiments may be utilized and structural changes may be made without departing from the scope of the present disclosure. Likewise, it should be understood that the wording and terminology used herein are for descriptive purposes and should not be considered restrictive. The use of "comprising", "including" or "having" and variations thereof herein are intended to cover the items listed thereafter and their equivalents and additional items. Unless otherwise limited, the terms "connection", "coupling" and "installation" and variations thereof in this document are used in a broad sense and encompass direct and indirect connections, couplings, and installations.

FIG. 1 is a block diagram showing a fingerprint identification device according to an embodiment of the present disclosure. 1, the fingerprint identification device 100 includes a processor 110, a self-luminous display panel 120, a fingerprint sensor 130 and a memory 140. The processor 110 is coupled to the self-luminous display panel 120, the fingerprint sensor 130 and the memory 140. In this embodiment, when the processor 110 determines that the finger is placed on the self-luminous display panel 120, the processor 110 operates the self-luminous display panel 120 to display at least one light-emitting pattern (or called a light spot) so as to illuminate the finger , At least one of the luminous patterns is displayed under the finger. And then, the processor 110 drives the fingerprint sensor 130 to sense the finger illuminated by the at least one light-emitting pattern, thereby generating a first fingerprint image and a second fingerprint image. In this embodiment, the processor 110 may determine whether the first fingerprint image and the second fingerprint image have opposite tones, so as to identify whether the finger is a real finger or a fake finger. Therefore, the fingerprint identification device 100 can effectively provide an anti-counterfeit finger function.

In this embodiment, the processor 110 may be a graphics processing unit (GPU), an image signal processor (ISP), a central processing unit (CPU), or another programmable unit. Design general or special microprocessors, digital signal processors (digital signal processors, DSP), programmable controllers, application specific integrated circuits (ASICs), programmable logic devices (PLDs) ), another similar processor or a combination of the above processor circuits. The memory 140 may be dynamic random-access memory (DRAM), flash memory, or non-volatile random-access memory (NVRAM), etc. Disclosure is not limited to this. The memory 140 can be used to store the fingerprint recognition program, the image data captured by the fingerprint sensor 130, the image data temporarily stored during the processing of the fingerprint recognition program, etc., so that the processor 110 can access the memory 140 Perform the fingerprint recognition function of the present disclosure.

In this embodiment, the self-luminous display panel 120 may be an organic light emitting diode (OLED) panel, but the present disclosure is not limited thereto. The fingerprint sensor 130 may be an optical fingerprint sensor, and includes a CMOS image sensor (CMOS image sensor, CIS). The fingerprint sensor 130 may be disposed under the self-luminous display panel 120. In this embodiment, during the fingerprint recognition period, the processor 110 may drive the self-luminous display panel 120 to display at least one light-emitting pattern to illuminate the finger, and the fingerprint sensor 130 may sense that the at least one light-emitting pattern is illuminated by the self-luminous display panel 120. Pattern illuminated finger.

FIG. 2 is a top view showing the fingerprint identification device according to the embodiment of FIG. 1 of the present disclosure. 1 and 2, the fingerprint identification device 100 may be a mobile phone, and an off-screen fingerprint sensing architecture is applied. In this embodiment, the processor 110 and the memory 140 may be, for example, a processing circuit of a mobile phone, but the present disclosure is not limited thereto. In an embodiment, the processor 110, the fingerprint sensor 130, and the memory 140 may be integrated into a fingerprint sensor chip. In this embodiment, the self-luminous display panel 120 may be parallel to the surface formed along the first direction D1 and the second direction D2 and the display/touch surface facing the third direction D3. The first direction D1, the second direction D2, and the third direction D3 are perpendicular to each other. For example, when the finger 200 touches the sensing area 121 of the self-luminous display panel 120 or is placed on the sensing area 121 of the self-luminous display panel 120, the self-luminous display panel 120 may provide corresponding touch data to the processor 110, This allows the processor 110 to correspondingly drive the fingerprint sensor 130. The fingerprint sensor 130 is arranged under the sensing area 121 of the self-luminous display panel 120 to correspond to the finger 200. The self-luminous display panel 120 may display at least one light-emitting pattern in the sensing area 121 so as to illuminate the finger 200, and the fingerprint sensor 130 may sense the finger 200 to generate the first fingerprint image and the first fingerprint image to the processor 110 during the fingerprint recognition period. The second fingerprint image.

It should be noted that in this embodiment, the self-luminous display panel 120 may provide at least two different types of illuminating light to illuminate the finger 200. The at least two different illuminating lights may include a first illuminating light and a second illuminating light, where the first illuminating light may be reflected by the surface of the finger 200 touching the self-luminous display panel 120, and the second illuminating light may penetrate the finger 200. In this embodiment, the first wavelength of the first illumination light is shorter than the second wavelength of the second illumination light. That is, when the finger receives the first illumination light from the at least one light-emitting pattern, the fingerprint sensor 130 may generate the first fingerprint image by sensing the reflected light provided by the finger, and when the finger receives the first illumination light from the at least one light-emitting pattern In the second illumination light, the fingerprint sensor 130 may generate a second fingerprint image by sensing the diffused light provided by the finger.

FIG. 3 is a schematic diagram showing a fingerprint sensor that receives reflected light from a finger according to an embodiment of the present disclosure. Referring to FIGS. 1 to 3, FIG. 3 shows the generation mechanism of the first fingerprint image of the present disclosure. In this embodiment, the fingerprint sensor 130 is configured on the substrate 101, and the bracket 102 is also configured on the substrate 101 for holding the lens 103, wherein the bracket 102 may be configured to surround the fingerprint sensor 130. The lens 103 may be a focusing lens, and the light guide path of the lens 103 corresponds to the fingerprint sensor 130 to collect image light from the finger 200. Cover glass 122 may be disposed on the self-luminous display panel 120. The self-luminous display panel 120 includes a plurality of pixels 123, and the pixels 123 form a pixel array for display function. The pixel 123 may be, for example, a plurality of OLED sub-pixels, and the pixel 123 may include a red pixel, a green pixel, and a blue pixel. In addition, in this embodiment, the self-luminous display panel 120 may further provide a touch function.

More specifically, during the fingerprint recognition period, when the finger 200 touches the cover glass 122 and is located above the sensing area 121 of the self-luminous display panel 120, the self-luminous display panel 120 may provide the touched coordinate data to the processor 110. Therefore, the processor 110 drives the self-luminous display panel 120 according to the coordinate data of the touch. At least a part of the pixels 123 of the sensing area 121 of the self-luminous display panel 120 may be lit to display a corresponding light-emitting pattern in the sensing area 121, so that the sensing area 121 of the self-luminous display panel 120 may correspondingly provide the first The illumination light I1 is used to illuminate the finger 200. In an embodiment, since visible light having a shorter wavelength is more easily reflected on the surface of the finger 200 touching the cover glass 122, the first illumination light I1 may be green light or blue light, but the present disclosure is not limited thereto. In this embodiment, the surface of the finger 200 touching the cover glass 122 can reflect at least a part of the first illumination light I1 to provide the reflected light R1 to the fingerprint sensor 130 through the lens 103. Therefore, the fingerprint sensor 130 can receive the reflected light R1 with fingerprint information to generate a sensed image to the processor 110.

FIG. 4 is a schematic diagram showing a fingerprint sensor that receives diffused light from a finger according to an embodiment of the present disclosure. Compared with the above-mentioned embodiment of FIG. 3, in this embodiment, during the fingerprint recognition period, when the finger 200 touches the protective glass 122 and is located above the sensing area 121 of the self-luminous display panel 120, the processor 110 receives the touch Coordinate data. Therefore, the processor 110 drives the self-luminous display panel 120 according to the coordinate data of the touch. At least a part of the pixels 123 of the sensing area 121 of the self-luminous display panel 120 may be illuminated to display another corresponding light-emitting pattern in the sensing area 121, so that the sensing area 121 of the self-luminous display panel 120 may be provided correspondingly The second illumination light I2 is so as to illuminate the finger 200. In an embodiment, since visible light having a longer wavelength is easier to pass through the surface of the finger 200 touching the cover glass 122, the second illuminating light I2 may be red light, but the present disclosure is not limited thereto. In this embodiment, at least a part of the second illuminating light I2 can pass through the finger 200 touching the cover glass 122, so that the second illuminating light I2 can diffuse inside the finger 200. Therefore, at least a part of the second illumination light I2 diffused inside the finger 200 may pass through the finger 200 touching the cover glass 122 again, and the diffused light D1 may be guided to the fingerprint sensor 130 through the lens 103. Therefore, the fingerprint sensor 130 can receive the diffused light D1 with fingerprint information to generate another sensed image to the processor 110.

Fig. 5 is a flowchart of a fingerprint identification method according to an embodiment of the present disclosure. Referring to FIGS. 1, 2, 5, and 6A to 7B, in this embodiment, when the finger 200 touches the self-luminous display panel 120 and is located above the sensing area 121 of the self-luminous display panel 120, the fingerprint identification device 100 The following steps S511 to S560 can be performed to display two different light emitting patterns. In step S511, the first light-emitting pattern 610 of FIG. 6A is displayed in the sensing area 121 of the self-luminous display panel 120. FIG. 6A is a schematic diagram showing a first light emitting pattern according to an embodiment of the present disclosure. The first light emitting pattern 610 includes a first pattern area 611. The first pattern area 611 has a specific color and can generate first illumination light. The first light emitting pattern 610 of the self-luminous display panel 120 provides first illumination light to the finger 200. In this embodiment, the first pattern area 611 may have a circular shape and face the center of the finger 200, so that the first illumination light can irradiate the center of the finger 200, but the present disclosure does not limit the shape of the first pattern area 611. The pattern shape of the first light emitting pattern 610 is not limited. In step S512, the fingerprint sensor 130 senses the finger 200 located above the sensing area of the self-luminous display panel 120 to generate a sensed image to the processor 110. In step S513, the processor 110 preprocesses the sensed image to generate the first fingerprint image 710 of FIG. 7A, where the processor 110 can remove image noise from the sensed image. FIG. 7A is a schematic diagram showing a first fingerprint image according to an embodiment of the present disclosure.

It should be noted that in this embodiment, the first fingerprint image is generated by the fingerprint sensor 130 receiving the reflected light provided by the finger 200. 3 again, if the finger 200 is a real finger, since the valley line of the fingerprint of the finger 200 does not touch the surface of the protective glass 122, at least a part of the first illumination light I1 is easily replaced by the fingerprint of the protective glass 122 corresponding to the fingerprint of the finger 200 The position of the valley line reflects. In contrast, another part of the first illuminating light I1 is not easily reflected by the position of the cover glass 122 corresponding to the ridge line of the fingerprint of the finger 200. Therefore, if the finger 200 is a real finger, the image brightness of the fingerprint 711 (corresponding to the ridge line of the fingerprint) of the first fingerprint image 710 is higher than that of the non-fingerprint area 712 (corresponding to the valley line of the fingerprint) of the first fingerprint image 710 )dark.

In step S521, the second light-emitting pattern 620 of FIG. 6B is displayed in the sensing area of the self-luminous display panel 120. FIG. 6B is a schematic diagram showing a second light emitting pattern according to an embodiment of the present disclosure. The second light emitting pattern 620 includes a second pattern area 621. The second pattern area 621 has another specific color and can generate second illumination light. The second light-emitting pattern 620 of the self-luminous display panel 120 provides second illumination light to the finger 200. In this embodiment, the second pattern area 621 may be ring-shaped to surround the darker or non-luminous third pattern area 622 so that the second illumination light can pass through the edge of the finger 200, but the present disclosure does not limit the second pattern The shape of the area 621 does not limit the pattern shape of the second light emitting pattern 620 either. In an embodiment, the first wavelength of the first illumination light is shorter than the second wavelength of the second illumination light. In step S512, the fingerprint sensor 130 senses the finger 200 located above the sensing area 121 of the self-luminous display panel 120 to provide another sensed image to the processor 110. In step S513, the processor 110 preprocesses the sensed image to generate the second fingerprint image 720 of FIG. 7B, where the processor 110 can remove the image noise of the sensed image. FIG. 7B is a schematic diagram showing a second fingerprint image according to an embodiment of the present disclosure.

It should be noted that, in this embodiment, the second fingerprint image is generated by the fingerprint sensor 130 receiving the diffused light provided by the finger 200. 4 again, if the finger 200 is a real finger, since the ridge line of the fingerprint of the finger 200 touches the surface of the protective glass 122, the second illuminating light I2 and the diffused light D1 easily pass through the protective glass 122 corresponding to the finger 200 The position of the ridge of the fingerprint. On the contrary, the second illumination light I2 does not easily pass through the position of the valley line of the protective glass 122 corresponding to the fingerprint of the finger 200. Therefore, if the finger 200 is a real finger, the image brightness of the fingerprint 721 (corresponding to the ridge of the fingerprint) of the second fingerprint image 720 is higher than that of the non-fingerprint area 722 of the second fingerprint image 720 (corresponding to the valley of the fingerprint). )bright. More importantly, the present disclosure does not limit the execution order of step S511 to step S513 and step S521 to step S523. In an embodiment, the processor 110 first executes step S511 to step S513, and then executes step S521 to step S523.

In addition, if the finger 200 is a fake finger, such as a printed two-dimensional image or a fake finger with only a flat fingerprint pattern, since the fake finger does not have three-dimensional valley lines and ridges, the fingerprint sensor 130 cannot generate two-dimensional images. Different fingerprint images, such as the first fingerprint image 710 and the second fingerprint image 720. Based on the above-mentioned image features of the first fingerprint image 710 and the second fingerprint image 720, in step S530, the processor 110 compares the first fingerprint image 710 with the second fingerprint image 720. For example, the processor 110 may compare the gray value of each pixel of the fingerprint image 710 with the gray value of each pixel of the second fingerprint image 720. In step S540, the processor 110 determines whether the first fingerprint image 710 and the second fingerprint image 720 have opposite tones. If the first fingerprint image 710 and the second fingerprint image 720 have opposite colors, the processor 110 executes step S550 to recognize that the finger 200 is a real finger, and continuously performs subsequent fingerprint recognition operations. If the first fingerprint image 710 and the second fingerprint image 720 do not have opposite tones, the processor 110 executes step S560 to recognize that the finger 200 is a fake finger, and stops performing the fingerprint recognition operation.

In detail, the processor 110 may determine whether the hue of the fingerprint 711 of the first fingerprint image 710 is opposite to the hue of the fingerprint 721 of the second fingerprint image 720, and determine the hue of the non-fingerprint area 712 of the first fingerprint image 710 Whether it is opposite to the color tone of the non-fingerprint area 722 of the second fingerprint image 720. However, in an embodiment, the processor 110 may determine whether the difference between the gray value of each pixel of the first fingerprint image 710 and the gray value of each pixel of the second fingerprint image 720 is greater than a threshold value. , In order to identify the finger 200.

In this embodiment, the fingerprint sensor 130 may sense the finger 200 twice to sequentially capture the first fingerprint image 710 and the second fingerprint image 720 during the same fingerprint recognition period. In addition, in an embodiment, the fingerprint sensor 130 includes a sensor array, and the sensor array may have a first sensing unit with a first color filter and a second color filter. The second sensing unit of the piece. Only the reflected light can pass through the first color filter, and only the diffused light can pass through the second color filter. Therefore, the first sensing unit with the first color filter can receive the reflected light to generate the first fingerprint image, and the second sensing unit with the second color filter can receive the diffused light to generate the second fingerprint image. In this embodiment, the first sensing unit and the second sensing unit perform image sensing non-simultaneously.

FIG. 8 is a flowchart of a fingerprint identification method according to another embodiment of the present disclosure. Referring to FIGS. 1, 2, and 7A to 9, in this embodiment, when the finger 200 touches the self-luminous display panel 120 and is located above the sensing area 121 of the self-luminous display panel 120, the fingerprint identification device 100 can perform the following Step S810 to step S870 to display a light emitting pattern. In step S810, the specific light-emitting pattern 910 of FIG. 9 is displayed in the sensing area of the self-luminous display panel 120. FIG. 9 is a schematic diagram showing a specific light emitting pattern according to an embodiment of the present disclosure. In an embodiment, the specific light emitting pattern 910 has, for example, a mixed light emitting pattern, which is generated by mixing the first light emitting pattern 610 of FIG. 6A with the second light emitting pattern 620 of FIG. 6B. In this embodiment, the specific light emitting pattern 910 includes a first pattern area 911 and a second pattern area 912. The first pattern area 911 has a specific color and can generate first illumination light. The second pattern area 912 has another specific color and can generate second illumination light. The second pattern area 912 surrounds the first pattern area 911, but the present disclosure is not limited thereto. However, in an embodiment, the specific light emitting pattern 910 may include a first pattern area 911 that occupies a part of the entire pattern and a second pattern area 912 that occupies another part of the entire pattern. In this embodiment, the specific light emitting pattern 910 of the self-luminous display panel 120 can provide the first illumination light and the second illumination light to the finger 200 at the same time.

In this embodiment, the first pattern area 911 may have a circular shape and face the center of the finger 200, so that the first illuminating light may be irradiated to the center of the finger 200. The second pattern area 912 may have a ring shape and is located between the first pattern area 911 and the dark pattern area 913 so that the second illuminating light can pass through the edge of the finger 200. The second pattern area 912 surrounds the first pattern area 911. However, the present disclosure does not limit the shape of the first pattern area 911, the shape of the second pattern area 912, or the pattern shape of the specific light emitting pattern 910. In an embodiment, the first wavelength of the first illumination light is shorter than the second wavelength of the second illumination light. In step S820, the fingerprint sensor 130 senses the finger 200 located above the sensing area of the self-luminous display panel 120 to provide two sensed images to the processor 110. In step S830, the processor 110 preprocesses the two sensed images to generate the first fingerprint image 710 of FIG. 7A and the second fingerprint image 720 of FIG. 7B, wherein the processor 110 may remove the image of the sensed image. Like noise. Compared with the embodiment of FIG. 5, in this embodiment, the fingerprint sensor 130 can sense the finger 200 once or twice to simultaneously or sequentially capture the first fingerprint image 710 and the second fingerprint image during the same fingerprint recognition period. Fingerprint image 720.

In step S840, the processor 110 compares the first fingerprint image 710 with the second fingerprint image 720. In step S850, the processor 110 determines whether the first fingerprint image 710 and the second fingerprint image 720 have opposite tones. If the first fingerprint image 710 and the second fingerprint image 720 have opposite colors, the processor 110 executes step S860 to recognize that the finger 200 is a real finger, and continuously performs subsequent fingerprint recognition operations. If the first fingerprint image 710 and the second fingerprint image 720 do not have opposite tones, the processor 110 executes step S870 to recognize that the finger 200 is a fake finger, and stops performing the fingerprint recognition operation.

In addition, in one embodiment, the fingerprint sensor 130 includes a sensor array, and the sensor array includes a first sensing unit with a first color filter and a second sensor with a second color filter.测unit. That is, the first sensing unit with the first color filter can receive the reflected light to generate the first fingerprint image, and the second sensing unit with the second color filter can receive the diffused light to generate the first fingerprint image. 2. Fingerprint image. In this embodiment, the first sensing unit and the second sensing unit can perform image sensing simultaneously or non-simultaneously.

In summary, the fingerprint identification device and fingerprint identification method of the present disclosure can provide an effective fingerprint identification function with an anti-counterfeit finger effect. The fingerprint identification device of the present disclosure provides two different color illumination lights to illuminate the finger, and captures two fingerprint images correspondingly by sensing the reflected light and diffuse light of the finger. Therefore, the fingerprint identification device of the present disclosure can determine whether two fingerprint images have opposite hues to effectively identify whether the finger is a real finger or a fake finger. In addition, the fingerprint recognition device to which the fingerprint recognition method of the present disclosure is applied can also effectively recognize whether the finger is a real finger or a fake finger.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the relevant technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be determined by the scope of the attached patent application.

100: Fingerprint recognition device 101: substrate 102: bracket 103: lens 110: processor 120: Self-luminous display panel 121: sensing area 122: protective glass 123: pixels 130: fingerprint sensor 140: memory 200: finger 610: The first luminous pattern 611, 911: the first pattern area 620: The second luminous pattern 621, 912: second pattern area 622: The third pattern area 710: The first fingerprint image 711, 721: Fingerprint 712, 722: non-fingerprint area 720: second fingerprint image 910: Specific luminous pattern 913: Dark pattern area D1: First direction D2: second direction D3: Third party I1: The first illuminating light I2: second illumination light R1: reflected light F1: diffuse light S511, S512, S513, S521, S522, S523, S530, S540, S550, S560, S810, S820, S830, S840, S850, S860, S870: steps

FIG. 1 is a block diagram showing a fingerprint identification device according to an embodiment of the present disclosure. FIG. 2 is a top view showing the fingerprint identification device according to the embodiment of FIG. 1 of the present disclosure. FIG. 3 is a schematic diagram showing a fingerprint sensor that receives reflected light from a finger according to an embodiment of the present disclosure. FIG. 4 is a schematic diagram showing a fingerprint sensor that receives diffused light from a finger according to an embodiment of the present disclosure. Fig. 5 is a flowchart of a fingerprint identification method according to an embodiment of the present disclosure. FIG. 6A is a schematic diagram showing a first light emitting pattern according to an embodiment of the present disclosure. FIG. 6B is a schematic diagram showing a second light emitting pattern according to an embodiment of the present disclosure. FIG. 7A is a schematic diagram showing a first fingerprint image according to an embodiment of the present disclosure. FIG. 7B is a schematic diagram showing a second fingerprint image according to an embodiment of the present disclosure. FIG. 8 is a flowchart of a fingerprint identification method according to another embodiment of the present disclosure. FIG. 9 is a schematic diagram showing a specific light emitting pattern according to an embodiment of the present disclosure.

100: Fingerprint recognition device

110: processor

120: Self-luminous display panel

130: fingerprint sensor

140: memory

Claims (24)

A fingerprint identification device, including: A self-luminous display panel for displaying at least one luminous pattern in a sensing area; A fingerprint sensor for sensing a finger above the sensing area of the self-luminous display panel to generate a first fingerprint image and a second fingerprint corresponding to the at least one light-emitting pattern Image; and A processor is coupled to the fingerprint sensor and used to determine whether the first fingerprint image and the second fingerprint image have opposite tones, so as to identify whether the finger is a real finger or a fake finger. The fingerprint identification device according to claim 1, wherein when the finger receives a first illumination light from the at least one light-emitting pattern, the fingerprint sensor detects a reflected light provided by the finger The first fingerprint image is generated, and when the finger receives a second illuminating light from the at least one light-emitting pattern, the fingerprint sensor generates all the lights by sensing a diffused light provided by the finger. The second fingerprint image. The fingerprint identification device according to claim 2, wherein when the finger is placed on the sensing area of the self-luminous display panel, the self-luminous display panel sequentially displays a first luminous pattern and a second Two luminous patterns, Wherein the first light-emitting pattern of the self-luminous display panel provides the first illumination light to the finger, so that the finger provides the reflected light to the fingerprint sensor according to the first illumination light Device, The second light-emitting pattern of the self-luminous display panel provides the second illumination light to the finger, so that the finger provides the diffused light to the fingerprint sensor according to the second illumination light Device. The fingerprint identification device according to claim 2, wherein when the finger is placed on the sensing area of the self-luminous display panel, the self-luminous display panel displays a first pattern area and a second pattern area. A luminous pattern in the pattern area, Wherein the first pattern area of the self-luminous display panel provides the first illumination light to the finger, so that the finger provides the reflected light to the fingerprint sensor according to the first illumination light Device, The second pattern area of the self-luminous display panel provides the second illuminating light to the finger, so that the finger provides the diffused light to the fingerprint sensor according to the second illuminating light Device. The fingerprint identification device according to claim 4, wherein the second pattern area surrounds the first pattern area. The fingerprint identification device according to claim 4, wherein different sensing units of the fingerprint sensor sense the reflected light and the diffused light at the same time to generate the first fingerprint image and the second fingerprint image Fingerprint image. The fingerprint identification device according to claim 4, wherein the fingerprint sensor does not simultaneously sense the reflected light and the diffused light to generate the first fingerprint image and the second fingerprint image. The fingerprint identification device according to claim 2, wherein a first wavelength of the first illumination light is shorter than a second wavelength of the second illumination light. The fingerprint identification device according to claim 2, wherein the fingerprint sensor includes a sensor array, and the sensor array includes a first sensing unit having a first color filter and A second sensing unit of a second color filter, The first sensing unit having the first color filter is used for receiving the reflected light to generate the first fingerprint image, and the second sensing unit having the second color filter is The sensing unit is used for receiving the diffused light to generate the second fingerprint image. The fingerprint identification device as described in claim 2, further comprising: A lens arranged between the self-luminous display panel and the fingerprint sensor, The fingerprint sensor receives the reflected light and the diffused light provided by the finger through the lens. The fingerprint recognition device according to claim 1, wherein when the processor determines that the first fingerprint image and the second fingerprint image have opposite tones according to the brightness of an image, the processor recognizes the The finger is the real finger, and when the processor determines that the first fingerprint image and the second fingerprint image do not have opposite tones according to the image brightness, the processor recognizes that the finger is The fake finger. The fingerprint identification device according to claim 1, wherein the self-luminous display surface is an organic light-emitting diode panel. A fingerprint identification method, including: Displaying at least one light-emitting pattern in a sensing area of a self-luminous display panel; A fingerprint sensor is used to sense a finger located above the sensing area of the self-luminous display panel to generate a first fingerprint image and a second fingerprint image corresponding to the at least one light-emitting pattern Like; and It is determined whether the first fingerprint image and the second fingerprint image have opposite tones, so as to identify whether the finger is a real finger or a fake finger. The fingerprint identification method according to claim 13, wherein the step of generating the first fingerprint image and the second fingerprint image includes: When the finger receives a first illuminating light from the at least one light-emitting pattern, generating the first fingerprint image by sensing a reflected light provided by the finger; and When the finger receives a second illuminating light from the at least one light-emitting pattern, the second fingerprint image is generated by using the fingerprint sensor to sense a diffuse light provided by the finger. The fingerprint identification method according to claim 14, wherein the step of displaying at least one light-emitting pattern in the sensing area of the self-luminous display panel includes: When the finger is placed on the sensing area of the self-luminous display panel, a first light-emitting pattern and a second light-emitting pattern are sequentially displayed through the self-luminous display panel, Wherein the first light-emitting pattern of the self-luminous display panel provides the first illumination light to the finger, so that the finger provides the reflected light to the fingerprint sensor according to the first illumination light Device, The second light-emitting pattern of the self-luminous display panel provides the second illumination light to the finger, so that the finger provides the diffused light to the fingerprint sensor according to the second illumination light Device. The fingerprint identification method according to claim 14, wherein the step of displaying at least one light-emitting pattern in the sensing area of the self-luminous display panel includes: When the finger is placed on the sensing area of the self-luminous display panel, a light-emitting pattern having a first pattern area and a second pattern area is displayed through the self-luminous display panel, Wherein the first pattern area of the self-luminous display panel provides the first illumination light to the finger, so that the finger provides the reflected light to the fingerprint sensor according to the first illumination light Device, The second pattern area of the self-luminous display panel provides the second illuminating light to the finger, so that the finger provides the diffused light to the fingerprint sensor according to the second illuminating light Device. The fingerprint identification method according to claim 16, wherein the second pattern area surrounds the first pattern area. The fingerprint identification method according to claim 16, wherein different sensing units of the fingerprint sensor sense the reflected light and the diffused light at the same time to generate the first fingerprint image and the second fingerprint image. Fingerprint image. The fingerprint identification method according to claim 16, wherein the fingerprint sensor non-simultaneously senses the reflected light and the diffused light to generate the first fingerprint image and the second fingerprint image. The fingerprint identification device according to claim 14, wherein a first wavelength of the first illumination light is shorter than a second wavelength of the second illumination light. The fingerprint identification method according to claim 14, wherein the fingerprint sensor includes a sensor array, and the sensor array includes a first sensing unit having a first color filter and A second sensing unit of a second color filter, The first sensing unit having the first color filter is used for receiving the reflected light to generate the first fingerprint image, and the second sensing unit having the second color filter is The sensing unit is used for receiving the diffused light to generate the second fingerprint image. The fingerprint identification method according to claim 14, wherein a lens is arranged between the self-luminous display panel and the fingerprint sensor, so that the fingerprint sensor receives the fingerprint provided by the finger through the lens The reflected light and the diffused light. The fingerprint identification method according to claim 13, wherein it is determined whether the first fingerprint image and the second fingerprint image have the opposite tones to identify the finger as the real finger or the fake finger The steps include: Determining whether the first fingerprint image and the second fingerprint image have opposite tones according to the brightness of an image; When the first fingerprint image and the second fingerprint image have opposite tones, identifying the finger as the real finger; and When the first fingerprint image and the second fingerprint image do not have opposite tones, the finger is identified as the fake finger. The fingerprint identification method according to claim 13, wherein the self-luminous display panel is an organic light-emitting diode panel.

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