CN111353405B - Fingerprint identification device, fingerprint identification system and electronic equipment - Google Patents
Fingerprint identification device, fingerprint identification system and electronic equipment Download PDFInfo
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- CN111353405B CN111353405B CN202010113384.3A CN202010113384A CN111353405B CN 111353405 B CN111353405 B CN 111353405B CN 202010113384 A CN202010113384 A CN 202010113384A CN 111353405 B CN111353405 B CN 111353405B
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- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
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- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/1347—Preprocessing; Feature extraction
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/1365—Matching; Classification
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Abstract
The invention provides a fingerprint identification device, a fingerprint identification system and electronic equipment. The fingerprint identification device comprises a fingerprint image processing unit which can be used for acquiring fingerprint information of an identification object by collecting light signals reflected by the identification object, wherein the fingerprint image processing unit further comprises a photosensitive pixel array and a signal processing part, signals captured by a first type of photosensitive pixels with a larger number are used for acquiring the fingerprint image information of the identification object in the photosensitive pixel array, and a second type of photosensitive pixels with a smaller number are provided with color filter layers so as to acquire color/skin color information of the same identification object by utilizing the signals captured by the second type of photosensitive pixels. Fingerprint identification is performed by utilizing fingerprint image information and color/skin color information, so that the safety and accuracy of fingerprint identification are improved. The fingerprint identification system and the electronic equipment comprise the fingerprint identification device.
Description
Technical Field
The present invention relates to the field of fingerprint identification, and in particular, to a fingerprint identification device, a fingerprint identification system, and an electronic device.
Background
At present, the fingerprint identification technology is widely applied to various applications related to user information verification, such as consumer electronics, access control systems, information acquisition and the like, and has the advantages of safety and convenience. Taking a mobile phone as an example, a full-screen mobile phone with a screen ratio of more than 90% has been developed, and the full-screen mobile phone is not provided with a special unlocking key on the front surface of the mobile phone, but is provided with a fingerprint identification chip below a display screen for identification.
However, with the popularization of fingerprint identification technology, fingerprint molds made of industrial materials such as inkpad and silica gel are also appeared in the market, 2D or 3D fingerprint images are arranged on the fingerprint molds, and when the existing fingerprint identification products are used for identifying the fingerprint molds, true or false cannot be separated, so that a great safety risk exists. Therefore, improvement on the existing fingerprint identification products is needed, the anti-counterfeiting capacity of related products is improved, and the application safety is enhanced.
Disclosure of Invention
The invention provides a fingerprint identification device, a fingerprint identification system and electronic equipment aiming at the problems existing in the existing fingerprint identification products.
In one aspect, the present invention provides a fingerprint recognition device, where the fingerprint recognition device includes a fingerprint image processing unit to collect optical signals reflected by a recognition object to obtain fingerprint information of the recognition object, and the fingerprint image processing unit includes a photosensitive pixel array and a signal processing part, where the photosensitive pixel array includes a plurality of first type photosensitive pixels distributed in two dimensions and second type photosensitive pixels distributed according to a preset rule, the number of the first type photosensitive pixels is greater than that of the second type photosensitive pixels, the second type photosensitive pixels are provided with a color filter layer different from the first type photosensitive pixels, the color filter layer is located on a surface of the second type photosensitive pixels facing the recognition object, and the signal processing part is configured to read and process signals output by the photosensitive pixel array, where the signals captured by the first type photosensitive pixels are used to obtain fingerprint image information of the recognition object, and the signals captured by the second type photosensitive pixels are used to obtain color/skin color information of the recognition object.
Optionally, the first type of photosensitive pixels are provided with a first color filter layer, and the first color filter layer is located on a side, facing the identification object, of the first type of photosensitive pixels.
Optionally, the first color filter layer is a green filter layer.
Optionally, the second type of photosensitive pixels includes blue filter pixels and red filter pixels.
Optionally, adjacent blue filter pixels are disposed adjacent to at least one corner of the red filter pixels.
Optionally, a side of the first type of photosensitive pixels facing the identification object is not provided with a color filter layer or is a transparent layer.
Optionally, the second type of photosensitive pixels includes at least green filter pixels, blue filter pixels, and red filter pixels for synthesizing color information.
Optionally, the photosensitive pixel array is a CMOS process photosensitive pixel array. Optionally, the fingerprint identification device further comprises an optical functional layer, which is arranged towards the identification object for imaging the received optical signal to the fingerprint image processing unit.
Optionally, the optical functional layer includes an optical lens or an optical microlens or a combination of both.
Optionally, the photosensitive pixel array is disposed on a glass substrate, and the color filter layer is disposed on a side of the photosensitive pixel array away from the glass substrate. Optionally, the fingerprint identification device further comprises an optical functional layer, which is arranged towards the identification object for imaging the received optical signal to the fingerprint image processing unit.
Optionally, the optical functional layer includes an optical fiber collimating panel or an optical microlens collimating structure.
Optionally, the fingerprint identification device further includes an infrared filter layer, and the infrared filter layer is disposed between the light paths from the light signals reflected by the identification object to the photosensitive pixel array.
In one aspect, the present invention provides a fingerprint identification system, including the fingerprint identification device described above, the fingerprint identification system further including an image information processing unit, a storage unit, and a comparison unit, the image information processing unit being in communication with a signal processing portion of the fingerprint image processing unit and obtaining fingerprint image information of the identification object based on a signal related to the first type of photosensitive pixels output by the signal processing portion, and obtaining color/skin tone information of the identification object based on a signal related to the second type of photosensitive pixels output by the signal processing portion; the storage unit is used for storing standard images and standard colors used for judging fingerprint information of the identification object; the comparison unit is used for comparing the fingerprint image information of the identification object obtained by the image information processing unit with the standard image to obtain a fingerprint image comparison result aiming at the identification object, and comparing the color/skin color information of the identification object obtained by the image information processing unit with the standard color to obtain a fingerprint color comparison result aiming at the identification object.
In one aspect, the invention provides an electronic device, which comprises the fingerprint identification device or the fingerprint identification system.
The fingerprint identification device provided by the invention comprises a fingerprint image processing unit, wherein the fingerprint image processing unit comprises a photosensitive pixel array comprising a first type of photosensitive pixels and a second type of photosensitive pixels, signals captured by the first type of photosensitive pixels are used for obtaining fingerprint image information of an identification object, signals captured by the second type of photosensitive pixels are used for obtaining color/skin color information of the same identification object, and the fingerprint identification device can be used for obtaining signals related to the fingerprint image information and the color/skin color information of the identification object by collecting light signals reflected by the identification object, so that the fingerprint image information and the color/skin color information of the identification object can be conveniently obtained. The fingerprint image information and the color/skin color information can be singly or jointly used for fingerprint identification judgment of the identification object, and the fingerprint identification safety and accuracy are improved. For example, in the occasion with higher safety requirement, the fingerprint image information and the color/skin color information can be set to pass through the two tests, so that the authenticity of the identification object is confirmed, and the possibility of passing the test of the fingerprint mold can be greatly reduced.
The fingerprint identification system and the electronic equipment provided by the invention comprise the fingerprint identification device, so that the fingerprint identification system and the electronic equipment have the same or similar advantages.
Drawings
Fig. 1 is a schematic structural diagram of a fingerprint recognition device according to an embodiment of the present invention.
Fig. 2A to 2C are schematic plan views of a photosensitive pixel array according to an embodiment of the invention.
Fig. 3 is a schematic plan view of a photosensitive pixel array in an embodiment of the invention.
Fig. 4A and 4B are schematic plan views of a CMOS substrate and a glass substrate provided with a photosensitive pixel array in an embodiment of the present invention, respectively.
Fig. 5A to 5D are schematic cross-sectional views of the photosensitive pixel array area according to an embodiment of the invention.
Fig. 6A and 6B are schematic diagrams of fiber optic collimation panels in an embodiment of the invention.
FIG. 7 is a schematic diagram of an optical micromirror layer in an embodiment of the invention.
Fig. 8 is a schematic view of a foraminous shading structure in an embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a fingerprint recognition system according to an embodiment of the present invention.
Reference numerals illustrate:
100-fingerprint recognition device; 110-an array of photosensitive pixels; 120-an optical functional layer; 130-an infrared filter layer; 122-fiber optic panel body; 121 a-an optical fiber hole; 122-optical microlenses; 123-a transparent interlayer; 123 a-a first light-shielding layer; 123 b-a second light-shielding layer; 200-a fingerprint identification system; 210-an image information processing unit; 220-a memory cell; 230-an alignment unit;
10-a display screen; a 20-semiconductor chip; 30-row driving chips; 40-column driver chip.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below by referring to the accompanying drawings and examples. It should be understood that the drawings in the specification are in a very simplified form and are all to a non-precise scale, simply to facilitate a clear and thorough description of the embodiments of the invention. Furthermore, the terms "first," "second," and the like in the description are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in other sequences than described or illustrated herein.
Fig. 1 is a schematic structural diagram of a fingerprint recognition device according to an embodiment of the present invention. Referring to fig. 1, an embodiment of the present invention first relates to a fingerprint recognition device 100, which can be used for fingerprint recognition. Taking the application to mobile phones for under-screen fingerprint recognition as an example, the fingerprint recognition device 100 may be disposed below the display screen 10 of the mobile phone for optical fingerprint recognition. The light beam incident on the recognition object (e.g., finger) is provided by a light source, which may be provided inside the fingerprint recognition device 100 or may be additionally provided. For example, for a self-luminous display screen 10 (e.g., an OLED display screen), the recognition object may be irradiated with the display screen as a light source. The light beam incident on the recognition object is, for example, white light. In another embodiment, a special light emitting element may be provided as a light source in the apparatus to which the fingerprint recognition device 100 is applied.
The fingerprint recognition device 100 includes a fingerprint image processing unit, which is used for collecting the light signal reflected by the recognition object to obtain the fingerprint information of the recognition object. In the fingerprint recognition device 100 according to an embodiment of the present invention, the fingerprint image processing unit further includes a photosensitive pixel array 110 and a signal processing section (not shown in fig. 1). Furthermore, the fingerprint recognition device 100 may further comprise an optical functional layer 120, the optical functional layer 120 being arranged towards the recognition object for imaging the received light signals to the fingerprint image processing unit, in particular to the photosensitive pixels in the photosensitive pixel array 110.
Specifically, the photosensitive pixel array 110 includes a plurality of first type photosensitive pixels (hereinafter, referred to as P1) distributed in two dimensions and a second type photosensitive pixels (hereinafter, referred to as P2) distributed according to a preset rule, the number of the first type photosensitive pixels P1 is greater than the number of the second type photosensitive pixels P2, the second type photosensitive pixels P2 are provided with Color Filter (CF) layers different from the first type photosensitive pixels P1, and the color filter layers are located on a side of the second type photosensitive pixels P2 facing the recognition object, that is, the optical signals reflected from the recognition object can enter the second type photosensitive pixels P2 from the side of the color filter layers. The signal processing section is used for reading out and processing the signal output from the photosensitive pixel array 110. The signals captured by the first type of photosensitive pixels P1 are mainly used to obtain fingerprint image information of the identification object. Accordingly, it is possible to discriminate the minutiae information contained in the fingerprint image information of the recognition object, for example, whether the recognition object is fingerprint information of an authenticated user prestored in the electronic device, mainly depending on the signal captured by the first photosensitive pixel P1. The signals captured by the second type of light sensitive pixels P2 are used to obtain color/skin tone information of the identification object. In order to reduce the false recognition rate of the fingerprint signal captured by the first photosensitive pixel P1, the higher the accuracy or accuracy of the fingerprint information of the first photosensitive pixel P1 is, the better. Thus, in the preferred embodiment, the number of the first type of photosensitive pixels P1 in the photosensitive pixel array 110 is greater than the number of the second type of photosensitive pixels P2.
Each of the first type photosensitive pixels P1 and the second type photosensitive pixels P2 includes a photoelectric conversion element, such as a photodiode, that converts an optical signal into a corresponding carrier. "color/skin tone" is understood herein to mean a color or skin tone, wherein the color is primarily directed to the color of a non-real finger, such as a machine-made fingerprint mold or the color of an item other than a finger (e.g., paper, IC card, tape, key, coin, clothing, etc., which may also be subjected to a fingerprint identification process due to false touches or other reasons), and the skin tone is primarily directed to the skin tone of a human body represented by a real finger.
As described above, in some preferred embodiments, the number of the first type of photosensitive pixels P1 is greater than the number of the second type of photosensitive pixels P2, so as to accurately obtain fingerprint image information of the identification object, and in all the photosensitive pixels arranged in two dimensions in the photosensitive pixel array 110, the number of the first type of photosensitive pixels P1 is preferably far greater than the number of the second type of photosensitive pixels P2, that is, the photosensitive pixel array 110 is mainly formed by the first type of photosensitive pixels P1 arranged in an array, and the second type of photosensitive pixels P2 are arranged at certain pixel positions in the array instead of the first type of photosensitive pixels P1, so that the optical signals reflected from various positions of the identification object can be captured by the first type of photosensitive pixels P1, and then the complete and accurate fingerprint image information can be obtained after photoelectric conversion and processing.
In order to acquire color/skin tone information of the reflective object from the light signal reflected from the recognition object, the second type of photosensitive pixels P2 are distributed in the photosensitive pixel array 110 according to a preset rule. The second type of photo-sensitive pixels P2 are used to capture a portion of the light signal reflected from the identification object, and color/skin tone information of one or more areas on the identification object is obtained subsequently from the light signal captured by the second type of photo-sensitive pixels P2.
Fig. 2A to 2C are schematic plan views of a photosensitive pixel array according to an embodiment of the invention. Referring to fig. 2A to 2C, in an embodiment, color filter layers are disposed corresponding to the first type of photosensitive pixels P1 and the second type of photosensitive pixels P2, but are not identical to each other. Wherein, a first color filter layer is disposed corresponding to the first type of photosensitive pixels P1, and the first color filter layer is located at a side of the first type of photosensitive pixels P1 facing the recognition object. A second color filter layer is disposed corresponding to the second type of photosensitive pixels P2, the second color filter layer being located at a side of the second type of photosensitive pixels P2 facing the recognition object. The second color filter layer allows the color of the light signal passing therethrough to be different from the first color filter layer. The color filter layers are arranged corresponding to the first type of photosensitive pixels P1 and the second type of photosensitive pixels P2, so that the film layers above the first type of photosensitive pixels P1 and the second type of photosensitive pixels P2 tend to be consistent, the structure of the photosensitive pixel array 110 is stable, and on the other hand, the number of the second type of photosensitive pixels P2 can be reduced by helping to synthesize color/skin color information of an object to be identified by using signals captured by part of the first type of photosensitive pixels P1 around the second type of photosensitive pixels P2.
The first color filter layer provided corresponding to the first type of photosensitive pixel P1 described above may be made to pass only visible light of a certain color as needed. Most or even all of the first type of photosensitive pixels P1 in the photosensitive pixel array 110 may use the first color filter layers with the same color and the same thickness, so as to avoid the influence caused by the difference of the first color filter layers when the fingerprint image information of the identification object is further obtained by using the light signals captured by each of the first type of photosensitive pixels P1.
In one embodiment, the first color filter layer disposed corresponding to the first type of photosensitive pixel P1 is a green filter layer (labeled G, as shown in fig. 2A and 2B), and the green filter layer only allows the green light signal to pass through, so that the photoelectric conversion element in the first type of photosensitive pixel P1 captures a signal in a green spectrum band. The light of the green spectrum band signal is more easily reflected by the finger skin of the human body carrying the fingerprint information relative to the signals of other color bands, so that the arrangement of the first type photosensitive pixels P1 with the green filter layer in the embodiment is beneficial to acquiring more or stronger fingerprint signals reflected by the identified finger, and is also beneficial to improving the quality of the fingerprint image information output by the first type photosensitive pixels P1 in the photosensitive pixel array. Referring to fig. 2A to 2C, in this embodiment, the second type of photosensitive pixels P2 are uniformly distributed in the photosensitive pixel array 110, and the second type of photosensitive pixels P2 include blue filter pixels (labeled B, i.e., second type of photosensitive pixels on which a blue filter is disposed) and red filter pixels (labeled R, i.e., second type of photosensitive pixels on which a red filter is disposed) so that the blue filter pixels can capture blue light signals and the red filter pixels can capture red light signals. Further, an adjacent blue filter pixel may be disposed adjacent to at least one corner of a red filter pixel, and one or two first type photosensitive pixels P1 (as green filter pixels) disposed around them are combined to form a sensing pixel unit (such as a shadow area a or B in fig. 2A and a similar shadow area in fig. 2B and 2C) capable of collecting light signals of three primary colors (red, green, blue, RGB), and color/skin tone information of the identification object can be obtained after processing the electrical signals output by the sensing pixel unit. Fig. 2A to 2C illustrate three embodiments of the sensing pixel unit including the first type of sensing pixel P1 and the second type of sensing pixel P2, which illustrate similar arrangements of the first type of sensing pixel P1 and the second type of sensing pixel P2 in the sensing pixel unit, wherein the first type of sensing pixel P1 and the second type of sensing pixel P2 are each provided with a corresponding color filter layer, and fig. 2A to 2C illustrate the trend of increasing the ratio of the second type of sensing pixel P2 in the sensing pixel array 111.
Specifically, as shown in fig. 2A and 2B, as an example, a plurality of blue filter pixels are arranged in the row direction and the column direction of the photosensitive pixel array 110, and the distance between two adjacent blue filter pixels arranged in the row direction is the same as the distance between two adjacent blue filter pixels arranged in the column direction. The distance between adjacent two blue filter pixels (the number of the first type photosensitive pixels P1 corresponding to the interval between the adjacent two blue filter pixels) can be adjusted as needed. In an alternative embodiment, as shown in fig. 2C, a plurality of blue filter pixels in the photosensitive pixel array 110 are arranged in rows and columns and are at an angle to the row and column directions of the photosensitive pixel array 110. The red filter pixels may take a similar arrangement as the blue filter pixels.
The present invention is not limited thereto, and in another embodiment, a plurality of second type photosensitive pixels P2 having the same color filtering function may be regularly arranged in other ways in the photosensitive pixel array 110. For example, the blue filter pixel and the red filter pixel in the second type of photosensitive pixel P2 may be disposed adjacently, and the blue filter pixel and the red filter pixel are not necessarily disposed adjacently at only one corner as shown in fig. 2A to 2C, which is not described herein.
For the same sensing pixel unit, there may be various arrangements between the second type of sensing pixels P2 (specifically, the blue filter layer pixels and the red filter layer pixels) and the first type of sensing pixels P1 serving as the green filter layer pixels, and specifically, the positions of the sensing pixels in the sensing pixel unit may be determined according to the connection between the signal processing portion and the sensing pixel array and the requirement of signal processing. Of course, in other embodiments, the second type of photosensitive pixels P2 are not necessarily blue filter pixels or red filter pixels, and the second type of photosensitive pixels P2 may be provided with color filter layers of other colors, so long as the color filter pixels configured by the second type of photosensitive pixels P2 can help to synthesize color information of the object to be identified. The color information of the blue filter pixel or the red filter pixel included in the second type of photosensitive pixel P2 illustrated herein is only schematically illustrated, and the second type of photosensitive pixel disclosed in this embodiment is not used to limit the scope of the present application as claimed.
The present application is not limited thereto, and in another embodiment, more than one blue filter pixel, red filter pixel or green filter pixel may be provided for the same sensing pixel unit, for example, the same sensing pixel unit may include one blue filter pixel, one red filter pixel and two green filter pixels (e.g., the shadow area B in fig. 2A) adjacent to each other in order to obtain color/skin tone information of an object to be identified. In addition, the number and arrangement of the photosensitive pixels in the photosensitive pixel array 110 shown in the drawings are merely illustrative, and may be adjusted as needed in practice.
In other embodiments of the fingerprint recognition device 100 of the present invention, a color filter layer different from the first type of photosensitive pixels P1 is disposed corresponding to the second type of photosensitive pixels P2, and the first type of photosensitive pixels P1 may be disposed so as to have substantially no filtering effect on the optical signal, i.e. the surface of the first type of photosensitive pixels P1 facing the recognition object is not provided with the color filter layer or is only provided with a transparent layer. This can prevent the color filter layer from weakening the light signal to be captured by the first type photosensitive pixel P1. A transparent layer here refers to a layer of material having a relatively high white light transmission (transmission, for example, greater than 70%), which has no filtering effect on the light signal reflected back by the object to be identified.
Fig. 3 is a schematic plan view of a photosensitive pixel array in an embodiment of the invention. Referring to fig. 3, in an embodiment, disposed on a surface of the first type of photosensitive pixels P1 in the photosensitive pixel array 110 toward the recognition object is a transparent layer, denoted by W. The second type of photosensitive pixels P2 are uniformly distributed in the photosensitive pixel array 110. In this embodiment, the second type of photosensitive pixel P2 shown in fig. 3 includes a green filter pixel (labeled G) in addition to a blue filter pixel (labeled B) and a red filter pixel (labeled R) to facilitate synthesizing color information using the three primary color principle. Of course, in other embodiments, the second type of photosensitive pixels P2 may also include three or four types of color light with other spectrum bands to synthesize color or skin color information of the object to be identified. In the embodiment shown in fig. 3, the second type of photosensitive pixels P2 specifically includes a group of adjacently disposed blue filter pixels, red filter pixels and green filter pixels (which may be regarded as a sensing pixel unit, as shown by a shaded area in fig. 3), and after processing the respective captured light signals, color/skin tone information of the identification object can be obtained. In this embodiment, the light signal captured by the first type photosensitive pixel P1 is used only to obtain fingerprint image information of the identification object. The fingerprint image information may be only a fingerprint gray image, without carrying color information.
In an embodiment of the fingerprint identification apparatus 100 of the present invention, the photosensitive pixel array 110 of the fingerprint image processing unit is a photosensitive pixel array manufactured by using a CMOS process. Referring to fig. 1, in this embodiment, the fingerprint recognition device 100 includes an optical functional layer 120. The optical functional layer 120 may include an optical lens. And in particular the optically functional layer 120 may also include an optical microlens layer disposed downstream of the optical path of the optical lens. In the embodiment of the fingerprint recognition device, the optical functional layer 120 may be a thin optical path structure including only the optical micro-lenses and the light shielding layer downstream of the optical micro-lenses to realize the whole optical functional layer. Furthermore, in an embodiment of the fingerprint recognition device 100, the fingerprint image processing unit may further comprise other filter layers, such as filter layers for infrared and/or ultraviolet light. The filter layer of infrared light and/or ultraviolet light can be integrated on the surface of the photosensitive pixel array 110, or can be arranged on the optical lens in a film plating manner. The filter layer may be disposed between the light paths from the light signal reflected by the identification object to the photosensitive pixel array 110.
Fig. 4A is a schematic plan view of a CMOS substrate provided with a photosensitive pixel array according to an embodiment of the present invention. Referring to fig. 1 and 4A, in one embodiment, a photosensitive pixel array 110 of a fingerprint image processing unit is disposed on a silicon wafer (corresponding to the CMOS substrate in fig. 4A), and the fingerprint recognition device 100 is fabricated by using a CMOS process (or integrated circuit process) compatible with the silicon wafer, and the fingerprint image processing unit of the fingerprint recognition device 100 is, for example, a semiconductor chip 20. The size of the photosensitive pixel array 110 can be adjusted according to the design of the optical functional layer 120. In this embodiment of the fingerprint recognition device 100, the signal processing section of the fingerprint image processing unit may be fabricated in the same semiconductor chip 20 as the photosensitive pixel array 110 and form an electrical connection. In addition, other control circuits and read out/output circuits may be provided in the same semiconductor chip 20. The semiconductor chip 20 has a signal input/output port, and the first type photosensitive pixel P1 and the second type photosensitive pixel P1 photoelectrically convert captured light signals and after being processed by a signal processing section within the semiconductor chip 20, the signals output by the semiconductor chip 20 include a signal for obtaining fingerprint image information of the recognition object and a signal for obtaining color/skin tone information of the recognition object.
In addition, in other embodiments of the fingerprint recognition device 100 of the present application, the above-described photosensitive pixel array 110 may also be formed on a glass substrate or a ceramic substrate, for example, formed on a glass substrate using a TFT-compatible process. The area of the photosensitive pixel on the glass substrate is larger than that of the CMOS substrate, which is manufactured by using the TFT technology. The manufacturing cost of the photosensitive pixel array manufactured by the large-area TFT technology is lower than that of the photosensitive pixel array manufactured by the CMOS technology. And when fingerprint identification is performed, the position limitation of the identification object is small.
In the embodiment of the fingerprint recognition device 100 in which the photosensitive pixel array 110 is fabricated on a glass substrate, the signal processing portion of the fingerprint image processing unit may be integrated on the glass substrate together with the photosensitive pixel array 110, or may be formed as a separate chip by another substrate (such as a CMOS process on a silicon substrate) and then bonded (bonded) to the glass substrate so as to be connected to the circuit terminals of the photosensitive pixel array 110. Fig. 4B is a schematic plan view of a glass substrate provided with a photosensitive pixel array in an embodiment of the application. Referring to fig. 4B, in an embodiment, the photosensitive pixel array 110 in the fingerprint recognition device 100 is formed on a glass substrate (corresponding to the TFT substrate in fig. 4B) compatible with the TFT process, and the readout circuit and the control circuit of the photosensitive pixel array 110 are implemented by a chip bonded to the glass substrate, and as an example, a row driving chip 30 and a column driving chip 40 may be disposed on the glass substrate, and the row driving chip 30 and the column driving chip 40 may be manufactured based on a silicon wafer through a CMOS process, and are electrically connected to the photosensitive pixel array 110 after being bonded to the glass substrate. The application is not limited thereto, and the pixel internal structure of the photosensitive pixel array 110 and the manner of signal control and signal reading and outputting in the embodiments of the application may be designed according to the disclosed technology, and when the photosensitive pixel array 110 is formed on a glass substrate, one or several chips may be additionally arranged on the same glass substrate according to the requirements of signal control and data transmission, so as to read and process the signals output by the photosensitive pixel array and perform fingerprint identification.
The following describes further embodiments of the fingerprint recognition device 100 with the photosensitive pixel array 110 fabricated on a glass substrate. Fig. 5A to 5D are schematic cross-sectional views of the photosensitive pixel array area according to an embodiment of the invention. Referring to fig. 5A to 5D, in an embodiment, the photosensitive pixel array 110 is disposed on a TFT-process-compatible glass substrate (i.e., TFT substrate), and the first type of photosensitive pixels P1 (illustratively, a first color filter layer is disposed) and the second type of photosensitive pixels P2 are disposed on a side of the photosensitive pixel array 110 away from the glass substrate, so that a Color Filter (CF) layer is covered on the photosensitive pixel array 110 (as shown in fig. 5A). In an alternative embodiment (as shown in fig. 5B and 5C), the fingerprint recognition device 100 further includes an infrared filter layer (IR filter) 130 disposed on the glass substrate, where the IR filter layer 130 is disposed between the light paths of the light signals reflected by the recognition object to the photosensitive pixel array 110. Wherein, corresponding to the position of the second type of photosensitive pixel P2, the infrared filter layer 130 is located between the photosensitive pixel array 110 and the second color filter layer (as shown in fig. 5B), or the infrared filter layer 130 is located on a side of the second color filter layer away from the photosensitive pixel array 110 (as shown in fig. 5C). The infrared filter layer 130 allows light rays outside the infrared light (wavelength range is about 760 nm-1 mm) to pass through, and by providing the infrared filter layer 130, the light rays outside the target band range irradiated to the photosensitive pixel array 110 are filtered, so that the interference of the light rays outside the target band range on the finally obtained fingerprint image information of the identification object is reduced.
Of course, in other embodiments, other filter layers may be included, not limited to the infrared filter layer, and other filter layers for filtering out signals of non-target bands may be disposed between the light signals reflected by the object to be identified and the photosensitive pixel array 110. Other filter layers can also be integrated with the infrared filter layer or layered with the infrared filter layer.
In the embodiment of the fingerprint recognition device 100 with the photosensitive pixel array 110 fabricated on the glass substrate as described above, referring to fig. 5D, the fingerprint recognition device 100 may further include an optical functional layer 120 disposed towards the recognition object, and the optical functional layer 120 is used to image the received optical signal to the fingerprint image processing unit. For example, the optical functional layer 120 may include an optical alignment structure corresponding to each of the first type of photosensitive pixels P1 and the second type of photosensitive pixels P2 in the photosensitive pixel array 110 one by one. The optical collimating structure may comprise a fiber collimating panel or an optical microlens collimating structure.
In one embodiment, the optical functional layer 120 is implemented using a fiber optic collimating panel. Fig. 6A and 6B are schematic diagrams of fiber optic collimation panels in an embodiment of the invention. Specifically, fig. 6A is a schematic plan view of a fiber optic collimating faceplate. Fig. 6B is a schematic longitudinal cross-sectional view of the fiber optic collimating panel of fig. 6A. Referring to fig. 6A and 6B, the optical fiber alignment panel includes an alignment panel body 121 formed of a light shielding material and a plurality of optical fiber holes 121a provided in the alignment panel body 121, each optical fiber hole 121a being provided in one-to-one correspondence with each photosensitive pixel (specifically, the first type photosensitive pixel P1 or the second type photosensitive pixel P2) in the photosensitive pixel array 110 to align incident reflected light. The light shielding material may be an insulating material opaque to visible light (wavelength in the range of about 380 to 750 nm), and may include, for example, a resin material such as Polycarbonate (PC), polyethylene terephthalate (PET), an inorganic insulating material such as silicon oxide, silicon nitride, aluminum oxide, titanium oxide, tantalum oxide, or zinc oxide, or the like, and may also be a resin including a black pigment, an inorganic insulating material, or the like.
FIG. 7 is a schematic diagram of an optical micromirror layer in an embodiment of the invention. Referring to fig. 7, in an embodiment, the optical microlens collimating structure includes an optical microlens layer, where the optical microlens layer includes a plurality of optical microlenses 122, each optical microlens 122 is disposed corresponding to one photosensitive pixel in the photosensitive pixel array 110, and a convex surface of each optical microlens 122 can be disposed toward the identification object, where the convex surface can be disposed to increase the total amount of reflected light incident into the photosensitive pixel, and to improve the accuracy of the fingerprint information of the finally obtained identification object.
The optical microlens collimating structure described above may also include a light shielding structure with apertures to collimate the light signals incident from the optical microlens 122. Fig. 8 is a schematic view of a foraminous shading structure in an embodiment of the present invention. Referring to fig. 8, the light shielding structure includes a transparent interlayer 123 (for example, a silicon oxide layer), and a first light shielding layer 123a and a second light shielding layer 123b disposed on an upper surface and a lower surface of the transparent interlayer 123, where a plurality of small holes arranged in an array are disposed in the first light shielding layer 123a, and corresponding openings are disposed in the second light shielding layer 123b at orthographic projection positions of the small holes in the first light shielding layer 123a, and when incident light is incident into the transparent interlayer 123 from the small holes in the first light shielding layer 123a, the incident light exits from the openings in the second light shielding layer 123b, thereby implementing a collimation function.
Referring to fig. 5B, as an example, in an embodiment, capturing, by the fingerprint image processing unit of the fingerprint recognition device 100, the optical signal reflected by the recognition object may include the following process: the reflected light signal is first incident on the optical functional layer 120 for focusing and collimation, then passes through the infrared filter layer 130 to remove some stray light, then is incident on the color filter layer (CF for the region where the color filter layer is disposed), and then enters the photosensitive pixel array 110. For the second type of photosensitive pixel P2, the light filtered by the color filter layer enters the photoelectric conversion element. For the first type of photosensitive pixel P1, the propagation of the optical signal through the infrared filter layer 130 may take any of the following forms: directly enters the photoelectric conversion element to be converted into an electric signal, or passes through the transparent layer and then enters the photoelectric conversion element, or enters the photoelectric conversion element after being filtered by the color filter layer (different from the optical signal frequency band allowed to pass by the color filter layer arranged at the position of the second type photosensitive pixel P2). Can be set according to the needs.
Referring to fig. 1, in the fingerprint identification apparatus 100 according to the embodiment of the present invention, after the light signal reflected by the identification object is collected by the photosensitive pixel array 110 of the fingerprint image processing unit, the output signal after the photoelectric conversion is read out by the signal processing part, and further processing (for example, a/D conversion, signal amplification, etc.) is performed according to the output requirement. The signal processing section may also process the signals captured by the first type photosensitive pixels P1 as fingerprint image information of the recognition object, and process the signals captured by the second type photosensitive pixels P2 as color/skin tone information of the recognition object. In one embodiment, after the processing of the signal processing part, the functions of further processing the signals captured by the first type of photosensitive pixels P1 into fingerprint image information of the identification object and processing the signals captured by the second type of photosensitive pixels P2 into color/skin color information of the identification object may be completed by a processor or a chip (such as a CPU or a GPU in a mobile phone) other than the fingerprint identification device 100.
In the fingerprint identification device 100, the photosensitive pixel array 110 in the fingerprint image processing unit is configured to capture the light signal reflected by the identification object, wherein the signals captured by the first type of photosensitive pixels P1 and the second type of photosensitive pixels P2 have different purposes after being processed by the signal processing portion, specifically, the signals captured by the first type of photosensitive pixels P1 are used to obtain the fingerprint image information of the identification object, and the signals captured by the second type of photosensitive pixels P2 are used to obtain the color/skin color information of the identification object. It can be seen that with the fingerprint recognition device 100, fingerprint image information and color/skin tone information of a recognition object can be obtained from the signal output from the signal processing section, and the fingerprint image information and the color/skin tone information can be used alone or in combination to inspect the recognition object, which contributes to improving the security and accuracy of fingerprint recognition. For example, in the occasion with higher safety requirement, the fingerprint image information and the color/skin color information can be set to pass through both the inspection, so that the authenticity of the identification object is confirmed, and the possibility of passing the fake fingerprint can be greatly reduced.
The embodiment of the invention next relates to a fingerprint identification system, which comprises the fingerprint identification device 100. Fig. 9 is a schematic structural diagram of a fingerprint recognition system according to an embodiment of the present invention. Referring to fig. 9, in one embodiment, the fingerprint recognition system 200 includes an image information processing unit 210 in addition to the fingerprint recognition device 100, the image information processing unit 210 communicates with a signal processing part in the fingerprint image processing unit, obtains fingerprint image information of a recognition object based on a signal related to the first type of photosensitive pixel P1 output by the signal processing part, and obtains color/skin tone information of the recognition object based on a signal related to the second type of photosensitive pixel P2 output by the signal processing part. For example, after obtaining the signals related to the first type of photosensitive pixels P1, the image information processing unit 210 may obtain the reflected light intensity difference of the light signal reflected from the recognition object according to some or all of the signals related to the first type of photosensitive pixels P1, further determine the width, direction, sweat pores, and other features of the fingerprint valley (or ridge) corresponding to the corresponding position on the recognition object, and generate a corresponding fingerprint image. After obtaining the signal related to the second type of photosensitive pixel P2, the color/skin tone information of the recognition object is obtained by comparing with a previously stored known standard value.
In addition, in order to distinguish the fingerprint information of the identification object, the fingerprint identification system 200 further includes a storage unit 220 and an alignment unit 230. The storage unit 220 is configured to store a standard image and a standard color for discriminating fingerprint information of the identification object. Taking the off-screen fingerprint identification as an example, the standard image may be a fingerprint image of the authenticated user acquired and stored in advance, and the standard color is a fingerprint color or skin color of the authenticated user. To improve the accuracy of the verification, the standard image and the standard color may each comprise more than one type, and different kinds of standard images or standard colors may correspond to different test temperature ranges or different illumination environments, for example, the storage unit 220 may store a normal fingerprint image, a normal finger color, a low temperature dry fingerprint image, a strong background finger color, and the like. When fingerprint information is judged, a certain standard image and/or standard color can be selected or adopted by default for comparison.
The comparing unit 230 is configured to compare the fingerprint image information of the identification object output by the image information processing unit 210 with the standard image to obtain a fingerprint image comparison result for the identification object, and compare the color/skin color information of the identification object output by the image information processing unit 210 with the standard color to obtain a fingerprint color comparison result for the identification object.
The comparison unit 230 may compare the fingerprint image information of the identification object with the standard image by using the disclosed image identification method, so as to obtain a fingerprint image comparison result. In addition, in order to distinguish such false fingerprints and avoid unnecessary fingerprint image recognition process by touching the mobile phone by mistake, the comparison unit 230 may also compare the color/skin color information of the recognition object generated by the image information processing unit 210 with the standard color to obtain a fingerprint color comparison result for the recognition object, considering that some fingerprint molds produced by using the molds may be consistent with the standard image.
Optionally, the comparison unit 230 obtains the fingerprint color comparison result by using a neural network model. The neural network model may be trained in advance by using a large number of actual fingerprints (obtained from the actual human finger) and fake fingerprints (e.g., fingerprint molds), and when the comparison is performed, the color/skin color information about the identification object obtained by the image information processing unit 210 is input into the neural network model, and the neural network model may score the color/skin color information of the identification object and determine whether the identification object is a fake fingerprint.
Alternatively, the color/skin color information of the identification object obtained by the image information processing unit 210 may include a color coordinate or a set of color channel components of the reflection surface of the identification object, and the fingerprint color comparison result may be obtained by comparing the color coordinate or each color channel component with a standard color.
In the fingerprint identification system 200 according to the embodiment of the present invention, the image information processing unit 210 may communicate with the signal processing portion of the fingerprint image processing unit, and may obtain fingerprint image information and color/skin tone information of the identification object based on the signal output by the signal processing portion, and in addition, the comparison unit 230 may not only obtain a fingerprint image comparison result for the identification object, but also may perform color/skin tone information comparison, so that on one hand, it is helpful to quickly identify a fake fingerprint, and when it is determined that the fake fingerprint is a fake fingerprint, it may be unnecessary to perform a fingerprint image identification process, on the other hand, by using the fingerprint identification system 200, fingerprint identification may be performed by two verification criteria (fingerprint image information and color/skin tone information, respectively), and it is helpful to improve accuracy and security of fingerprint identification.
The embodiment of the invention further relates to an electronic device, which comprises the fingerprint identification device 100 or the fingerprint identification system 200. The electronic device is, for example, a mobile phone, a tablet computer, a GPS navigator, a personal digital assistant, an intelligent wearable device, etc., or may be an input device of an access control system or a security system, or other devices with fingerprint identification function. The electronic device may perform functions including, but not limited to, on-screen fingerprint unlocking, user authentication, rights acquisition, etc. by using the fingerprint recognition apparatus 100 or the fingerprint recognition system 200, for example, the electronic device may acquire fingerprint feature information of a user based on the fingerprint recognition system 200 and match with fingerprint information of an authenticated user stored in the electronic device in advance, so as to implement authentication of the current user, thereby confirming whether the current user has the corresponding rights to perform related operations on the electronic device. Taking a mobile phone as an example, the fingerprint image processing unit of the fingerprint identification device can be arranged below the display screen or on the back of the mobile phone, so that the screen duty ratio is not affected, and by arranging the fingerprint identification system 200, fingerprint image information and color/skin color information of an identification object can be obtained according to signals output by the signal processing part, and further, the accuracy and safety of fingerprint identification are improved.
It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are referred to each other.
The foregoing description is only illustrative of the preferred embodiments of the present invention, and is not intended to limit the scope of the claims, and any person skilled in the art may make any possible variations and modifications to the technical solution of the present invention using the method and technical solution disclosed above without departing from the spirit and scope of the present invention, so any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention fall within the scope of the technical solution of the present invention.
Claims (16)
1. A fingerprint recognition device, the fingerprint recognition device comprising a fingerprint image processing unit for collecting light signals reflected by a recognition object to obtain fingerprint information of the recognition object, the fingerprint image processing unit comprising:
the system comprises a photosensitive pixel array, a first color filter layer and a second color filter layer, wherein the photosensitive pixel array comprises a plurality of first type photosensitive pixels distributed in a two-dimensional manner and second type photosensitive pixels distributed according to a preset rule, the number of the first type photosensitive pixels is larger than that of the second type photosensitive pixels, the second type photosensitive pixels are provided with color filter layers different from the first type photosensitive pixels, and the color filter layers are positioned on one surface of the second type photosensitive pixels facing the identification object;
And the signal processing part is used for reading out and processing signals output by the photosensitive pixel array, wherein the signals captured by the first type of photosensitive pixels are used for obtaining fingerprint image information of the identification object, each second type of photosensitive pixels are one pixel in a sensing pixel unit for collecting three primary color light signals, and the signals captured by the second type of photosensitive pixels are used for obtaining color/skin color information of the identification object through the sensing pixel unit.
2. The fingerprint recognition device according to claim 1, wherein the first type of photosensitive pixels is provided with a first color filter layer, the first color filter layer being located on a side of the first type of photosensitive pixels facing the recognition object.
3. The fingerprint recognition device of claim 2, wherein the first color filter layer is a green filter layer.
4. A fingerprint recognition device according to claim 3, wherein said second type of photosensitive pixels comprises blue filter pixels and red filter pixels.
5. The fingerprint recognition device of claim 4, wherein adjacent ones of the blue filter pixels are disposed adjacent at least one corner of the red filter pixels.
6. The fingerprint recognition device according to claim 1, wherein a side of the first type of photosensitive pixels facing the recognition object is not provided with a color filter layer or is a transparent layer.
7. The fingerprint recognition device of claim 6, wherein the second type of photosensitive pixels includes at least green filter pixels, blue filter pixels, and red filter pixels for synthesizing color information.
8. The fingerprint recognition device according to any one of claims 1 to 7, wherein the photosensitive pixel array is a CMOS process photosensitive pixel array.
9. The fingerprint recognition device of claim 8, further comprising:
an optical functional layer disposed toward the recognition object for imaging the received optical signal to the fingerprint image processing unit.
10. The fingerprint recognition device of claim 9, wherein the optical functional layer comprises an optical lens or an optical microlens or a combination of both.
11. The fingerprint recognition device of any one of claims 1-7, wherein the array of photosensitive pixels is disposed on a glass substrate and the color filter layer is disposed on a side of the array of photosensitive pixels remote from the glass substrate.
12. The fingerprint identification device of claim 11, further comprising:
an optical functional layer disposed toward the recognition object for imaging the received optical signal to the fingerprint image processing unit.
13. The fingerprint identification device of claim 12, wherein the optically functional layer comprises a fiber optic collimating panel or an optical microlens collimating structure.
14. The fingerprint recognition device according to any one of claims 1 to 7, further comprising:
the infrared filter layer is arranged between the light paths from the light signals reflected by the identification object to the photosensitive pixel array.
15. A fingerprint identification system comprising a fingerprint identification device according to any one of claims 1 to 14, the fingerprint identification system further comprising:
an image information processing unit which communicates with a signal processing section of the fingerprint image processing unit and obtains fingerprint image information of the recognition object based on a signal related to the first type of photosensitive pixels output by the signal processing section and obtains color/skin tone information of the recognition object based on a signal related to the second type of photosensitive pixels output by the signal processing section;
The storage unit is used for storing standard images and standard colors used for judging fingerprint information of the identification object;
and the comparison unit is used for comparing the fingerprint image information of the identification object obtained by the image information processing unit with the standard image to obtain a fingerprint image comparison result aiming at the identification object, and comparing the color/skin color information of the identification object obtained by the image information processing unit with the standard color to obtain a fingerprint color comparison result aiming at the identification object.
16. An electronic device comprising a fingerprint recognition device according to any one of claims 1 to 14 or comprising a fingerprint recognition system according to claim 15.
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| WO2023280269A1 (en) * | 2021-07-07 | 2023-01-12 | 北京极豪科技有限公司 | Biometric information recognition module and electronic device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108495115A (en) * | 2018-04-17 | 2018-09-04 | 德淮半导体有限公司 | Imaging sensor and its pixel groups and pel array, the method for obtaining image information |
| CN109154869A (en) * | 2016-06-07 | 2019-01-04 | 深圳市汇顶科技股份有限公司 | The optics collimator of optical sensor module under screen for shielding upper fingerprint induction |
| CN109313706A (en) * | 2018-09-25 | 2019-02-05 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device, method and terminal device |
| CN109690567A (en) * | 2018-12-14 | 2019-04-26 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and electronic equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9977947B2 (en) * | 2015-08-25 | 2018-05-22 | Gingy Technology Inc. | Fingerprint identification method and device thereof |
| CN107004130B (en) * | 2015-06-18 | 2020-08-28 | 深圳市汇顶科技股份有限公司 | Optical sensor module under screen for sensing fingerprint on screen |
-
2020
- 2020-02-24 CN CN202010113384.3A patent/CN111353405B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109154869A (en) * | 2016-06-07 | 2019-01-04 | 深圳市汇顶科技股份有限公司 | The optics collimator of optical sensor module under screen for shielding upper fingerprint induction |
| CN108495115A (en) * | 2018-04-17 | 2018-09-04 | 德淮半导体有限公司 | Imaging sensor and its pixel groups and pel array, the method for obtaining image information |
| CN109313706A (en) * | 2018-09-25 | 2019-02-05 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device, method and terminal device |
| CN109690567A (en) * | 2018-12-14 | 2019-04-26 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and electronic equipment |
Non-Patent Citations (1)
| Title |
|---|
| 石博雅 ; 孟卓 ; 刘铁根 ; 王龙志 ; .全光纤光学相干层析系统用于人造指纹的识别.光电子.激光.2013,(12),全文. * |
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