CN113780104A

CN113780104A - Biological information identification module and electronic equipment

Info

Publication number: CN113780104A
Application number: CN202110970567.1A
Authority: CN
Inventors: 孙建成; 王海生; 毕莹
Original assignee: Beijing Jihao Technology Co Ltd
Current assignee: Beijing Jihao Technology Co Ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2021-12-10

Abstract

The application provides a biological information identification module and electronic equipment, relates to electron device technical field. The biological information identification module is a fingerprint identification module and comprises a light path guide layer and an optical sensor; the optical path guiding layer comprises a plurality of optical channels, and the optical sensor comprises a plurality of photosensitive pixel units and at least one vacant unit arranged among the photosensitive pixel units; the light beam carrying the fingerprint information above the vacant unit is received by at least one photosensitive pixel unit through the light channel. The electronic equipment comprises a display screen and a biological information identification module arranged below the display screen. This biological information identification module and electronic equipment can receive the light beam that carries fingerprint information in the bigger area scope under the condition that does not increase the whole volume of module.

Description

Biological information identification module and electronic equipment

Technical Field

The application relates to the technical field of electronic devices, in particular to a biological information identification module and electronic equipment.

Background

With the high development of the intellectualization of the terminal electronic device, the application of the human body biological information identification in the electronic device is more and more deep and wide, and the electronic device is awakened through the unlocking of the biological information identification in the past, so that the identification, the identity authentication and the like of various software programs are gradually developed. Moreover, as the application range of the biological information identification in the electronic device becomes wider, the accuracy of the biological information identification and the identification capability and the identification speed of the electronic device, especially the display type electronic device, for the fingerprint information are correspondingly improved.

In the existing biological information identification technology, the fingerprint identification is one of biological information identification, and the identification mode is mainly optical fingerprint identification, wherein the fingerprint is irradiated and reflected by a light source of a display panel, and fingerprint reflected light carrying specific biological information is received, recorded or analyzed by an optical detection device, so that the function of recording the fingerprint or identifying the specific fingerprint is achieved. Nowadays, with the miniaturization demand of electronic devices such as mobile phones and tablet computers, which are dominant hand-held mobile terminals, the demand for the thinning and miniaturization of fingerprint recognition modules disposed inside the electronic devices is also increasing.

Usually, the cell-phone, electronic equipment of panel computer class mainly through be applied to the fingerprint identification module under the display screen in order to receive, the discernment to specific fingerprint is realized to the fingerprint reverberation that record or analysis carried specific biological information, because electronic equipment's miniaturization requirement, realize that fingerprint identification's optical detection device's volume also constantly reduces, in order to guarantee to biological information identification's accuracy, should guarantee at least in a less area scope to biological information's collection area on the display screen, but the structure of fingerprint identification module is difficult to further reduce, this miniaturization demand that has just greatly influenced electronic equipment.

Disclosure of Invention

An object of the embodiment of the application is to provide a biological information identification module and an electronic device, which can reduce the structural size of the biological information identification module, so that the module structure is miniaturized.

The embodiment of the application provides a biological information identification module, which is a fingerprint identification module and comprises a light path guide layer and an optical sensor; the optical path guiding layer comprises a plurality of optical channels, and the optical sensor comprises a plurality of photosensitive pixel units and at least one vacant unit arranged among the photosensitive pixel units; the light beam carrying the fingerprint information above the vacant unit is received by at least one photosensitive pixel unit through the light channel.

Optionally, the light channel comprises an inclined light channel having an angle with a line perpendicular to the surface of the optical sensor; the light beam carrying the fingerprint information above the vacant unit is received by the photosensitive pixel unit through the inclined light channel.

Optionally, the optical sensor comprises a plurality of dummy cells discretely distributed in the plurality of light-sensitive pixel cells.

Optionally, the shape of the dummy cell is the same as the shape of the light-sensitive pixel cell; and/or the area of the dummy cell is the same as the area of the light-sensitive pixel cell.

Optionally, the number of dummy cells is less than the number of light-sensitive pixel cells.

Optionally, the plurality of photosensitive pixel units and the at least one vacant unit form a photosensitive pixel unit group; and the light channels corresponding to at least part of the photosensitive pixel units in the photosensitive pixel unit group are inclined light channels.

Optionally, the light channel corresponding to at least one photosensitive pixel unit in the photosensitive pixel unit group, which is symmetrical to the center of the vacant unit, is an inclined light channel.

Optionally, the center of the photosensitive pixel unit group is a vacant unit.

Optionally, the light channels corresponding to at least two light-sensitive pixel units symmetric around the empty unit intersect above the center.

Alternatively, a plurality of dummy cells in the photosensitive pixel cell group are included, and a photosensitive pixel cell is disposed between two of the dummy cells.

Alternatively, the light beam above the dummy cell is incident on at least one light-sensitive pixel cell adjacent to the dummy cell through an inclined light channel.

Optionally, in the photosensitive pixel unit group, included angles of the light channels corresponding to a plurality of photosensitive pixel units with the same pitch as the vacant unit are the same.

Alternatively, a plurality of photosensitive pixel cells and dummy cells constituting the photosensitive pixel cell group are arranged and combined in the form of M × N, where M is an integer of 1 or more and N is an integer of 2 or more.

Alternatively, a total area of the plurality of photosensitive pixel cells in the photosensitive pixel cell group is equal to or greater than a total area of the dummy cells.

Optionally, the dummy unit includes a first reserved area for arranging the circuit signal line.

Optionally, the vacancy unit further comprises a second reserved area for setting circuit elements.

Optionally, the back side of the optical sensor is further provided with an insulating layer and a conductive layer in sequence, a via hole is formed through the optical sensor and the insulating layer and communicated with the conductive layer, and the two spaced vacant units are communicated with the conductive layer through the via hole.

In another aspect of the embodiments of the present application, an electronic device is provided, which includes a display screen and a biological information identification module as described in any one of the foregoing items disposed below the display screen.

Optionally, a fingerprint identification area is disposed on the display screen, and light beams from the fingerprint identification area above the vacant unit are received by the corresponding photosensitive pixel unit through the light channel.

The beneficial effect of this application includes:

according to the biological information identification module, the biological information identification module is a fingerprint identification module and comprises a light path guide layer and an optical sensor; the optical path guiding layer comprises a plurality of optical channels, and the optical sensor comprises a plurality of photosensitive pixel units and at least one vacant unit arranged among the photosensitive pixel units; the light beam carrying the fingerprint information above the vacant unit is received by at least one photosensitive pixel unit through the light channel. When the biological information identification module is used, light beams carrying fingerprint information can be transmitted to the optical sensor through a plurality of optical channels, and then are received and identified by a photosensitive pixel unit of the optical sensor; meanwhile, the light beam carrying the fingerprint information above the vacant unit can be received by at least one photosensitive pixel unit through the optical channel, and the normal transmission of the light beam is not influenced. The vacant unit is arranged among the photosensitive pixel units, and the light beams carrying the fingerprint information above the vacant unit are received by at least one photosensitive pixel unit after passing through the optical channel, so that the photosensitive pixel units except the vacant unit can completely receive the light beams carrying the fingerprint information within the fingerprint information acquisition area range of the display screen, the optical signal receiving capacity of the photosensitive pixel units is improved, the biological information identification module can receive more optical signals of the light beams carrying the fingerprint information, more fingerprint information is obtained, and the fingerprint information identification accuracy is facilitated; in addition, under the condition of the fingerprint information acquisition area of unnecessary increase display screen, this application can also improve optical sensor's photosensitive area's effective utilization, reduces optical sensor's photosensitive area to reduce optical sensor's volume, and then save more inner spaces for the electronic equipment who adopts the biological information identification module that this application provided, can reduce the cost of biological information identification module simultaneously.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a biological information recognition module according to an embodiment of the present disclosure;

FIG. 2 is a sectional view A-A of FIG. 1;

FIG. 3 is a schematic structural diagram of an optical sensor in a biological information recognition module according to an embodiment of the present disclosure;

fig. 4 is a second schematic structural diagram of an optical sensor in a biological information identification module according to an embodiment of the present disclosure;

fig. 5 is a third schematic structural diagram of an optical sensor in a biological information identification module according to an embodiment of the present disclosure;

FIG. 6 is a fourth schematic view illustrating a structure of an optical sensor in a biological information recognition module according to an embodiment of the present disclosure;

FIG. 7 is a fifth schematic view illustrating a structure of an optical sensor in a biological information recognition module according to an embodiment of the present disclosure;

FIG. 8 is a sixth schematic view illustrating a structure of an optical sensor in a biological information recognition module according to an embodiment of the present disclosure;

fig. 9 is a schematic view of the structure of a group of photosensitive pixel cells in fig. 8;

FIG. 10 is a seventh schematic view illustrating a structure of an optical sensor in a biological information recognition module according to an embodiment of the present disclosure;

fig. 11 is a schematic view of the structure of a group of photosensitive pixel cells in fig. 10;

FIG. 12 is a cross-sectional view B-B of FIG. 11;

FIG. 13 is an eighth schematic view illustrating a structure of an optical sensor in a biological information recognition module according to an embodiment of the present application;

FIG. 14 is a cross-sectional view C-C of FIG. 13;

fig. 15 is a schematic view of the structure of a group of photosensitive pixel cells in fig. 13;

FIG. 16 is a cross-sectional view D-D of FIG. 15;

FIG. 17 is one of the schematic structural views of another embodiment of FIG. 15;

FIG. 18 is a second schematic structural view of the alternate embodiment of FIG. 15;

FIG. 19 is a cross-sectional view D '-D' of FIG. 18;

fig. 20 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Icon: 100-an optical path guiding layer; 101-an optical channel; 102-oblique light channels; theta, theta₁、θ₂、θ’₁、θ’₂、θ₃、θ’₃-an included angle; 200-an optical sensor; 201-a group of photosensitive pixel cells; 202. 202a, 202b, 202c, 202d, 202e, 202f, 202g, 202h, 202i, 202j, 202 k-photosensitive imageA prime unit; 203. 203A, 203B, 203C-empty cells; 300-a display screen; 301-fingerprint identification area.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

It should also be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Biometric technology has been widely applied to various terminal devices or electronic apparatuses. Biometric identification techniques include, but are not limited to, fingerprint identification, palm print identification, vein identification, iris identification, face identification, biometric identification, anti-counterfeiting identification, and the like. Among them, fingerprint recognition generally includes optical fingerprint recognition, capacitive fingerprint recognition, and ultrasonic fingerprint recognition. With the rise of the full screen technology, the fingerprint identification module can be arranged in a local area or a whole area below the display screen, so that Under-screen (Under-display) optical fingerprint identification is formed; or, can also be with inside partly or the whole display screen that integrates to electronic equipment of optical fingerprint identification module to form the optical fingerprint identification In-screen (In-display). The Display screen may be an Organic Light Emitting Diode (OLED) Display screen or a Liquid Crystal Display (LCD) screen, or the like. Fingerprint identification methods generally include the steps of fingerprint image acquisition, preprocessing, feature extraction, feature matching, and the like. Part or all of the steps can be realized by a traditional Computer Vision (CV) algorithm, and also can be realized by an Artificial Intelligence (AI) -based deep learning algorithm. The fingerprint identification technology can be applied to portable or mobile terminals such as smart phones, tablet computers and game equipment, and other electronic equipment such as smart door locks, automobiles and bank automatic teller machines, and is used for fingerprint unlocking, fingerprint payment, fingerprint attendance, identity authentication and the like.

Be applied to biological information identification module under the display screen, the individual that specific biological information belongs to is realized confirming and discerning through receiving, record or analysis carry specific biological information's reverberation usually, for setting up the display screen on biological information identification module, its self at first needs to realize required display function, therefore, can divide out the collection area that is used for carrying out biological information discernment under the screen very limited, and to biological information's extraction, it needs to have sufficient light beam that carries biological information as the basis again and just can obtain accurate identification information, on this basis, the module can obtain carry biological information's light beam more, its discernment accuracy, interference killing feature, can corresponding obtain the improvement to the identification ability of creating the fake etc.. Therefore, how to sufficiently acquire the reflected light beams carrying the specific biological information in the limited biological information acquisition area and process the reflected light beams to acquire as much specific biological information as possible from the reflected light beams, so as to effectively improve the accuracy of confirmation and identification of people to whom the biological characteristic information belongs, which is an important problem to be solved and improved in the specific application of the biological information identification module.

Of course, the biological information identification module does not necessarily need to be integrated under the display screen of the display device, and in other possible application scenarios, the biological information module may exist as a separate module for biological information identification. For example, a transparent protective glass plate or a protective film layer may be disposed on the biological information module, so that the light beam carrying the biological information is incident to the biological information identification module through the protective glass plate and is then identified by the biological information identification module.

Based on this, the present application provides a biological information identification module, specifically referring to fig. 1 and fig. 2, the biological information identification module is a fingerprint identification module, and the biological information identification module includes an optical path guiding layer 100 and an optical sensor 200; the optical path guiding layer 100 includes a plurality of light channels 101, and the optical sensor 200 includes a plurality of light-sensitive pixel units 202 and at least one empty cell 203 disposed between the plurality of light-sensitive pixel units 202; the light beam carrying the fingerprint information above the vacant cell 203 is received by at least one light-sensitive pixel cell 202 via the light channel 101.

Fig. 2 is a schematic structural diagram of a biological information identification module according to an embodiment of the present disclosure, and as shown in fig. 2, an optical path guiding layer 100 and an optical sensor 200 are sequentially disposed along a transmission direction of a light beam carrying fingerprint information, the optical path guiding layer 100 includes a plurality of optical channels 101, each optical channel 101 enables the light beam carrying fingerprint information to pass through, and the light beam carrying fingerprint information is incident on the optical sensor 200 below through the optical channel 101 of the optical path guiding layer 100 above and is received by at least one photosensitive pixel unit 202 on the optical sensor 200. The shape and size of the optical channel 101 are not particularly limited in this embodiment, as long as the optical channel 101 can receive as many light beams carrying fingerprint information as possible smoothly by the optical sensor 200 through the optical channel 101, for example, the longitudinal section of the optical channel 101 may be a quadrangle, a trapezoid, or the like, and the cross section of the optical channel 101 may be a circle, a square, or the like.

As shown in fig. 1, the optical sensor 200 includes a plurality of photosensitive pixel units 202, and further includes at least one vacant unit 203, where the vacant unit 203 refers to a unit that is obtained by leaving the photosensitive pixel unit 202 that receives the light signal empty at the position of the optical sensor 200, and the vacant unit 203 is located between the plurality of photosensitive pixel units 202, where each photosensitive pixel unit 202 can receive the light beam carrying the fingerprint information via the optical channel 101, and the light beam carrying the fingerprint information above the vacant unit 203 can be received by at least one photosensitive pixel unit 202 of the plurality of photosensitive pixel units 202 after passing through the optical channel 101, so that efficient reception of the incident light beam carrying the fingerprint information can still be ensured in the case where the vacant unit 203 is provided.

Illustratively, as shown in fig. 1, the optical sensor 200 includes one dummy cell 203 and twenty-four photosensitive pixel cells 202, and the one dummy cell 203 and the twenty-four photosensitive pixel cells 202 around the one dummy cell 203 form a 5 × 5 array structure. After the light beam carrying the fingerprint information above the vacant cell 203 passes through the light channel 101 above the vacant cell 203 as shown in fig. 2, the light beam can be received by the light sensing pixel unit 202 adjacent to the vacant cell 203 for fingerprint information identification. The photosensitive pixel units 202 used for receiving the light beams carrying the fingerprint information on the optical sensor 200 are multiple (twenty-four), when a plurality of vacant units 203 are arranged among the photosensitive pixel units 202, or when the light beams above the vacant units 203 corresponding to one photosensitive pixel unit 202 cannot be completely received only through one adjacent photosensitive pixel unit 202, the light beams carrying the fingerprint information above the vacant units 203 can be correspondingly received through the photosensitive pixel units 202, so that more light beams carrying the fingerprint information can be ensured to be received, more fingerprint information can be obtained, omission of the light beams carrying the fingerprint information is avoided, and the fingerprint information identification accuracy is improved.

It should be noted that, in practical applications, the optical sensor 200 is generally divided into tens of thousands of pixel units for disposing the photosensitive pixel unit 202 or the vacant unit 203, and the drawings in the present application cannot fully show such a large number of unit components, so that, here and in the following drawings, a smaller number of the pixel units are exemplarily shown and described, and those skilled in the art should understand that, the practical optical sensor 200 can be exemplarily shown and described as a partial example in the present application, and the practical arrangement of the pixel units of the practical optical sensor 200 is formed by repeated arrangement.

In addition, as can be seen from fig. 1 and fig. 2, in the present embodiment, the optical channels 101 and the photosensitive pixel units 202 are in a one-to-one correspondence relationship, and the light beam carrying the fingerprint information above the vacant unit 203 passes through the corresponding optical channel 101 and is then received by one photosensitive pixel unit 202 adjacent to the vacant unit 203, but this is not necessarily the case, and the correspondence relationship between the optical channel 101 and the pixel units on the optical sensor 200 may also be in a many-to-one or other correspondence manner, as long as the light beam carrying the fingerprint information as much as possible can be received by the photosensitive pixel unit 202 on the optical sensor 200 according to the correspondence relationship.

Of course, fig. 1 is only an alternative implementation of the embodiment of the present application, and the number of the photosensitive pixel units 202 and the vacant units 203 in the optical sensor 200 and the combination form therebetween are not limited to the implementation of fig. 1. The number and arrangement of the dummy cells 203 and the light-sensitive pixel cells 202 may be in various combinations, but there is at least one dummy cell 203.

Illustratively, the optical sensor 200 may also be shown in fig. 3 or 4, which show a combination of two dummy cells 203 and four light-sensitive pixel cells 202 to form a 2 x 3 rectangular array. Furthermore, in fig. 3 and 4, the two dummy cells 203 are distributed differently, and in fig. 3, the two dummy cells 203 are arranged in a dot-connected manner between opposite corners of the two dummy cells 203, as shown in fig. 4, the two dummy cells 203 are completely spaced apart from each other by one photosensitive pixel unit 202. As another example, fig. 5 shows a combination of a 2 × 3 rectangular array of three dummy cells 203 and three photosensitive pixel cells 202, and fig. 6 shows a combination of a 2 × 2 square array of three dummy cells 203 and one photosensitive pixel cell 202. As can be seen from fig. 1 and 6, fig. 1 and 6 each show the arrangement of square arrays having the same number of horizontal rows and vertical columns formed by the dummy unit 203 and the photosensitive pixel unit 202, and fig. 3 to 5 each show the arrangement of rectangular arrays having different numbers of horizontal rows and vertical columns formed by the dummy unit 203 and the photosensitive pixel unit 202. Of course, the number of the dummy cells 203 and the photosensitive pixel cells 202 may also include other arrangement forms, and the dummy cells 203 and the photosensitive pixel cells 202 may also be set to other shapes besides the square in the drawings, and the like, which is not described herein again, and those skilled in the art may design the arrangement forms according to actual situations.

According to the biological information identification module provided by the application, the biological information identification module is a fingerprint identification module and comprises a light path guide layer 100 and an optical sensor 200; the optical path guiding layer 100 includes a plurality of light channels 101, and the optical sensor 200 includes a plurality of light-sensitive pixel units 202 and at least one empty cell 203 disposed between the plurality of light-sensitive pixel units 202; the light beam carrying the fingerprint information above the vacant cell 203 is received by at least one light-sensitive pixel cell 202 via the light channel 101. When the biological information identification module is used, light beams carrying fingerprint information can be transmitted to the optical sensor 200 through the plurality of optical channels 101, so that the light beams are received and identified by the photosensitive pixel units 202 of the optical sensor 200; meanwhile, the light beam carrying the fingerprint information above the vacant cell 203 can be received by the at least one light-sensing pixel unit 202 through the light channel 101, and the normal transmission thereof is not affected. According to the light-sensitive pixel unit 202, the vacant unit 203 is arranged among the light-sensitive pixel units 202, the light beams carrying the fingerprint information above the vacant unit 203 are received by at least one light-sensitive pixel unit 202 after passing through the light channel 101, the light beams carrying the fingerprint information in the fingerprint information acquisition area range of the display screen can be completely received by the light-sensitive pixel units 202 except the vacant unit 203, the light signal receiving capacity of the light-sensitive pixel units 202 is improved, so that a biological information identification module can receive more light signals of the light beams carrying the fingerprint information, more fingerprint information is obtained, and the accuracy of fingerprint information identification is facilitated; in addition, under the condition that needn't increase the fingerprint information collection area of display screen, this application can also improve optical sensor 200's the regional area of sensitization effective utilization, reduces optical sensor 200's the regional area of sensitization to reduce optical sensor 200's volume, and then save more inner spaces for the electronic equipment who adopts the biological information identification module that this application provided, can reduce the cost of biological information identification module simultaneously.

Referring to fig. 2, in an alternative implementation manner of the embodiment of the present application, the optical channel 101 includes an inclined optical channel 102, and an included angle θ is formed between the inclined optical channel 102 and a straight line perpendicular to a surface of the optical sensor 200; the light beam carrying the fingerprint information above the vacant cell 203 is received by the light-sensing pixel cell 202 through the inclined light channel 102.

The plurality of light-sensitive pixel cells 202 of the optical sensor 200 collectively form a light-sensitive area of the optical sensor 200, due to the inclined light channel 102 included in the light channel 101, the guided transmission of the light beam carrying the fingerprint information through the inclined light channel 102 can be realized without changing the photosensitive area of the optical sensor 200, a light beam carrying fingerprint information from outside the upper side of a light-sensitive pixel cell 202 is directed through the slanted light channel 102 onto at least one light-sensitive pixel cell 202, therefore, the light beams carrying fingerprint information can be received by the optical sensor 200 comprehensively and effectively under the condition of reducing the number of the photosensitive pixel units 202 (reducing the area of the photosensitive areas), the effective utilization rate of the area of the photosensitive areas of the optical sensor 200 is improved, the area of the photosensitive areas of the optical sensor 200 is reduced, and the size of the optical sensor 200 is reduced.

It should be noted that the light-receiving surface of the optical sensor 200 may also be configured into a plurality of different surface types as required, including but not limited to a plane, a convex arc, a concave arc, an inclined surface, etc., and in the embodiments of the present application, a surface type of the conventional optical sensor 200, such as a plane, is taken as an example for illustration. Wherein the photosensitive receiving surface is composed of the surfaces of the plurality of photosensitive pixel units 202 and the vacant units 203 of the optical sensor 200.

Illustratively, as shown in fig. 2, the inclined light channel 102 has an angle θ between a straight line perpendicular to the surface of the optical sensor 200, the angle θ is between 0 ° and 60 °, and the angle θ may be set to 0 °, 2 °, 5 °, 10 °, 15 °, 35 °, 40 °, 53 °, 60 °, etc. according to specific arrangementThis is not illustrated here. In an alternative implementation manner of the embodiment of the present application, in the plurality of inclined light channels 102, the included angle θ of the inclined light channels 102 is arranged in a manner of increasing angle from the central inclined light channel 102 to the direction away from the central inclined light channel 102, that is, θ₁＜θ₂，θ’₁＜θ’₂And, the inclined light channels 102 at both sides are symmetrically arranged with the central inclined light channel 102 as the center, and the included angle θ between the two symmetrical inclined light channels 102 is equal, that is, θ in fig. 2₁＝θ’₁，θ₂＝θ’₂。

While fig. 1 and 2 illustrate an example in which the optical sensor 200 includes one dummy cell 203, in an alternative implementation of the embodiment of the present application, as shown in fig. 8, the optical sensor 200 includes a plurality of dummy cells 203, and the plurality of dummy cells 203 are discretely distributed in the plurality of photosensitive pixel cells 202.

When the number of the dummy units 203 is plural, the discrete distribution among the plural dummy units 203 includes: as shown in fig. 13, any two of the dummy cells 203 are completely isolated from each other by the plurality of photosensitive pixel cells 202 and are absolutely not connected to each other; alternatively, as shown in fig. 8, in another case, when the dummy cells 203 and the photosensitive pixel cells 202 are both square, only the corners of the two dummy cells 203 are connected in a theoretical manner, and thus the two dummy cells are not connected to each other. Both cases are discrete distributions among the plurality of empty cells 203 defined in the embodiment of the present application. The plurality of dummy cells 203 are separated by the photosensitive pixel cell 202. The non-contact of the plurality of vacant units 203 means that the plurality of vacant units 203 do not form a surface-to-surface contact, so as to avoid that the mutually connected vacant units 203 form a large area which does not receive the light beam carrying the fingerprint information, so that the peripheral photosensitive pixel units 202 cannot completely and accurately receive the light beam carrying the fingerprint information of the corresponding vacant units 203, and the light beam carrying the fingerprint information is lost.

Taking fig. 3 as an example, four photosensitive pixel units 202, namely, a photosensitive pixel unit 202a, a photosensitive pixel unit 202B, a photosensitive pixel unit 202c and a photosensitive pixel unit 202d, are arranged around the vacant unit 203A, two photosensitive pixel units 202, namely, a photosensitive pixel unit 202a and a photosensitive pixel unit 202c, are arranged around the vacant unit 203B, the vacant units 203A and the vacant units 203B are connected only by diagonal points, the diagonal point connection has been discussed in the foregoing, and does not belong to the category of connection of a plurality of vacant units 203, the vacant units 203A, the photosensitive pixel units 202B and the photosensitive pixel units 202c are connected by planes and surfaces, the vacant units 203A and the photosensitive pixel units 202d are connected by diagonal points, the vacant units 203B and the photosensitive pixel units 202a, 202B and the photosensitive pixel units 202c are connected by planes, the vacant units 203A and the photosensitive pixel units 202d are connected by diagonal points, and the vacant units 203B and the photosensitive pixel units 202a, The photosensitive pixel units 202c are connected with each other through surfaces and faces, so that the light beams carrying the fingerprint information above the vacant units 203A and 203B need to be provided with the light channels 101 with corresponding inclination directions and angles to achieve the result of being received by at least one photosensitive pixel unit 202 around the photosensitive pixel units, and the plurality of vacant units 203 are arranged in a discrete distribution manner, so that the condition that information is lost when the light beams carrying the fingerprint information above the plurality of connected vacant units 203 are received due to the fact that the surfaces of the plurality of vacant units 203 are connected with each other to form a large area incapable of receiving the light beams carrying the fingerprint information is avoided, and therefore, the accuracy of the fingerprint information identification result is improved.

For example, fig. 3 to 5 each show two or three empty cells 203, and as can be seen from fig. 3 to 5, the empty cells 203 are discretely distributed among the photosensitive pixel cells 202, so that each empty cell 203 is adjacent to a larger number of photosensitive pixel cells 202 as much as possible, and then the light beam carrying the fingerprint information above the empty cell 203 can be received by the adjacent photosensitive pixel cells 202, so that the optical sensor 200 receives more light beams carrying the fingerprint information, and obtains more fingerprint information.

Still taking fig. 3 as an example, fig. 3 shows two vacant cells 203 and four photosensitive pixel cells 202, and for the vacant cell 203A, after the light beam carrying fingerprint information above the vacant cell 203A is incident through the inclined light channel 102, the light beam carrying fingerprint information is always received by part or all of the

photosensitive pixel cells

202a, 202b, 202c and 202d around the vacant cell 203A, so that the light beam carrying fingerprint information above the vacant cell 203A is not missed. Similarly, the light beam carrying fingerprint information above the vacant cell 203B is incident through the inclined light channel 102 and is always received by one or both of the

photosensitive pixel cells

202a and 202c around the vacant cell 203B. Then, for the

dummy units

203A and 203B shown in fig. 3, since the two dummy units 203 are discretely distributed between the plurality of photosensitive pixel units 202, as long as the light beam carrying the fingerprint information is located above the dummy units 203, the light beam carrying the fingerprint information can be received by a part of or all of the photosensitive pixel units 202 adjacent to the dummy units 203, and omission of the light beam carrying the fingerprint information is avoided.

In an alternative implementation of the embodiments of the present application, the shape of the dummy cell 203 is the same as the shape of the light-sensitive pixel cell 202; and/or the area of the dummy cell 203 is the same as the area of the light-sensitive pixel cell 202.

The dummy cells 203 and the light-sensing pixel cells 202 are distributed in the light-sensing area of the optical sensor 200, and in order to make full use of the light-sensing area and to make a compact design, the dummy cells 203 and the photosensitive pixel cells 202 may be disposed in the same shape, as shown in the various drawings of the present embodiment, the dummy cells 203 and the photosensitive pixel cells 202 are both square, and for example, the dummy cells 203 and the photosensitive pixel cells 202 may be disposed in the same area, and for the sake of understanding, as shown in fig. 7, fig. 7 includes one dummy cell 203 and two photosensitive pixel cells 202, the dummy cells 203 are arranged in an elliptical shape, the photosensitive pixel cells 202 are arranged in an irregular shape having an arc shape matching and adjoining the elliptical shape, and the area of the elliptical dummy cells 203 and the area of the photosensitive pixel cells 202 in the irregular shape are set to be equal. In this way, even if the light-sensitive pixel unit 202 and the dummy unit 203 are different in shape, the light beam carrying fingerprint information above the dummy unit 203 can be made incident into the other light-sensitive pixel units 202 by the arrangement of the light tunnel 101.

It should be understood that fig. 7 only shows an example in which the areas of the dummy cells 203 and the photosensitive pixel cells 202 are the same, and is not the only limitation or the only scheme that can be supported for the present application in which the areas of the dummy cells 203 and the photosensitive pixel cells 202 are the same. Also included is an alternative embodiment in which the dummy cells 203 and the light-sensitive pixel cells 202 are the same in shape and area, for example, any of fig. 1 and 3-6 are examples in which the dummy cells 203 and the light-sensitive pixel cells 202 are the same in shape and area.

In an alternative implementation of the embodiment of the present application, since the photosensitive pixel units 202 are configured to receive the light beam carrying the fingerprint information above themselves and also receive the light beam carrying the fingerprint information above the dummy units 203, the number of the dummy units 203 in the optical sensor 200 is smaller than that of the photosensitive pixel units 202.

It is to be appreciated that if the number of the dummy cells 203 is greater than the number of the photosensitive pixel cells 202, then the photosensitive pixel cells 202 need to receive more than one light beam carrying fingerprint information above the dummy cells 203 after receiving the light beam carrying fingerprint information above the photosensitive pixel cells 202, and when the receiving requirement of the light beam exceeds the maximum receivable capability of the photosensitive pixel cells 202, a portion of the light beam carrying fingerprint information above the dummy cells 203 may not be received by the photosensitive pixel cells 202, thereby directly causing the loss of the portion of the light beam carrying fingerprint information. Therefore, the number of the dummy cells 203 is smaller than the number of the light-sensitive pixel cells 202, so as to ensure that the light beam carrying the fingerprint information above each of the dummy cells 203 can be received by the light-sensitive pixel cells 202.

In an alternative implementation manner of the embodiment of the present application, a plurality of photosensitive pixel units 202 and at least one dummy unit 203 constitute one photosensitive pixel unit group 201; the light channels 101 corresponding to at least some of the light-sensitive pixel units 202 in one light-sensitive pixel unit group 201 are oblique light channels 102.

A plurality of photosensitive pixel cells 202 and at least one dummy cell 203 form one photosensitive pixel cell group 201, and a plurality of such photosensitive pixel cell groups 201 are divided on the optical sensor 200. For example, as shown in fig. 8, two

empty cells

203A and 203B connected by dots in fig. 8 and seven photosensitive pixel cells 202 around the empty cells form a 3 × 3 photosensitive pixel cell group 201, and referring to fig. 9, it can be seen that a plurality of such 3 × 3 photosensitive pixel cell groups 201 in fig. 8 are regularly arranged to form a photosensitive area of the optical sensor 200.

As an example, the photosensitive pixel cells 202 and the dummy cells 203 in the photosensitive pixel cell group 201 are arranged in the number and manner shown in fig. 9, and a plurality of photosensitive pixel cell groups 201 are arranged in the state shown in fig. 8; for another example, the photosensitive pixel cells 202 and the dummy cells 203 in the photosensitive pixel cell group 201 are arranged in the number and manner shown in fig. 11, that is, in the photosensitive pixel cell group 201 of 3 × 3, three diagonally located

dummy cells

203A, 203B, and 203C and the other six photosensitive pixel cells 202 are respectively arranged, as shown in fig. 10, a plurality of photosensitive pixel cell groups shown in fig. 11 may form an arrangement form of one photosensitive pixel cell group 201 shown in fig. 10, that is, nine photosensitive pixel cell groups 201 shown in fig. 11 are included in fig. 10.

For another example, other combinations of the dummy unit 203 and the photosensitive pixel unit 202 shown in fig. 13 may be formed, and are not described herein again.

In an alternative implementation manner of the embodiment of the present application, the numbers of the dummy cells 203 and the photosensitive pixel cells 202 in each photosensitive pixel cell group 201 on the optical sensor 200, and the arrangement rules of the dummy cells 203 and the photosensitive pixel cells 202 in each photosensitive pixel cell group 201 are the same.

Taking fig. 11 as an example, in one photosensitive pixel unit group 201, the light channel 101 corresponding to at least part of the photosensitive pixel units 202 is the inclined light channel 102, in the photosensitive pixel unit group 201 shown in fig. 11, fig. 12 is obtained by cutting along the direction B-B of the vacant unit 203C, the photosensitive pixel unit 202j and the photosensitive pixel unit 202k, as shown in fig. 12, the light channel 101 corresponding to the photosensitive pixel unit 202j located at the center is the vertical light channel 101, the light beam carrying fingerprint information passing through the light channel 101 enters the corresponding photosensitive pixel unit 202j, and the vacant units 203C and the photosensitive pixel units 202k located at both sides of the photosensitive pixel unit 202j respectively correspond to the inclined light channels 102, so that the light channels 101 in the same photosensitive pixel unit group 201 can be relatively gathered and compact, and the light loss of the light channel 101 in the transmission process of the light beam carrying fingerprint information can be reduced as much as possible, the function and function of the optical channel 101 are described in detail in the foregoing, and will not be described in detail here.

In an alternative implementation manner of the embodiment of the present application, the light channel 101 corresponding to at least one photosensitive pixel unit 202 in the photosensitive pixel unit group 201, which is symmetric with the center of the dummy unit 203, is an inclined light channel 102.

As shown in fig. 11 and 12, the light-sensing pixel unit 202k is symmetric with respect to the center of the empty unit 203C, and as can be seen from fig. 12, the light channel 101 corresponding to the light-sensing pixel unit 202k is the inclined light channel 102. Of course, it should be understood that in other views in the viewing angle direction, it should be understood that the light channel 101 corresponding to the photosensitive pixel cell 202e that is symmetric with respect to the center of the dummy cell 203C should also be an oblique light channel, and if the photosensitive pixel cell group 201 includes only two dummy cells 203 as shown in fig. 9, a photosensitive pixel cell 202j that is symmetric with respect to the center of the dummy cell 203A is also included, and the light channel 101 corresponding to the photosensitive pixel cell 202j is also an oblique light channel.

It should be noted that the symmetry with the center of the dummy cell 203 described herein includes symmetry with respect to the geometric center of the entire photosensitive pixel cell group 201, and also includes symmetry with respect to each center line in the photosensitive pixel cell group 201. Of course, in the following description, if the center of the photosensitive pixel cell group 201 is defined as the dummy cell 203, the center should refer to the geometric center of the entire photosensitive pixel cell group 201, and the array form of the photosensitive pixel cell group 201 should have a condition such that the geometric center can dispose the dummy cell 203, for example, the photosensitive pixel cell group 201 is disposed as a combination of odd rows and odd columns.

In an alternative implementation of the embodiment of the present application, the center of the photosensitive pixel unit group 201 is the vacant unit 203.

As shown in fig. 15, a 3 × 3 photosensitive pixel unit group 201 is provided, in the photosensitive pixel unit group 201, there is a vacant unit 203 and the vacant unit 203 is located at the center of the photosensitive pixel unit group 201, and in a cross-sectional view of the photosensitive pixel unit 202g and the photosensitive pixel unit 202h, which are symmetrical to each other, in a direction D-D shown in fig. 16, the light channels 101 corresponding to the photosensitive pixel unit 202g and the photosensitive pixel unit 202h are the inclined light channels 102.

As shown in fig. 9, 11 or 15, the centers of the photosensitive pixel cell groups 201 are all vacant cells 203, except that the photosensitive pixel cells 202 are all around the vacant cells 203 in the center of fig. 15; the photosensitive pixel cell group 201 in fig. 9 includes a dummy cell 203B at the upper right corner in addition to the dummy cell 203A at the center; the photosensitive pixel cell group 201 in fig. 11 includes a dummy cell 203B located at the upper right corner and a dummy cell 203C located at the lower left corner, in addition to the dummy cell 203A located at the center.

As shown in fig. 16, the light channels 101 corresponding to at least two light-sensitive pixel units 202 symmetric about the empty unit 203 intersect above the center.

Taking one photosensitive pixel unit group 201 in fig. 15 as an example, in the photosensitive pixel unit group 201, the inclined light channels 102 corresponding to the

photosensitive pixel units

202g and 202h intersect above the center in the D-D sectional view direction shown in fig. 16, where the

photosensitive pixel units

202g and 202h are symmetrical about the vacant unit 203.

Still taking fig. 16 as an example, the light beam carrying the fingerprint information above the dummy cell 203 is incident on the photosensitive pixel cell 202h adjacent to the dummy cell 203 through the oblique light channel 102 and received.

For another example, as shown in fig. 9, two dummy cells 203 in the photosensitive pixel cell group 201 are included, which are a dummy cell 203A and a dummy cell 203B, and a photosensitive pixel cell 202f and a photosensitive pixel cell 202h are disposed between the

dummy cells

203A and 203B, so that the

dummy cells

203A and 203B are connected by a connection point.

Referring to fig. 9, the photosensitive pixel unit group 201 includes an empty unit 203A and an empty unit 203B, the empty unit 203A and the empty unit 203B are only connected by a connection point, and a photosensitive pixel unit 202f and a photosensitive pixel unit 202h are disposed between the empty unit 203A and the empty unit 203B, that is, each empty unit 203 is adjacent to each other through a side surface and is a photosensitive pixel unit 202, the empty unit 203A has four photosensitive pixel units 202 adjacent to each other through the side surface, that is, a photosensitive pixel unit 202f, a photosensitive pixel unit 202g, a photosensitive pixel unit 202j, and a photosensitive pixel unit 202h, and also has three photosensitive pixel units 202 connected to opposite corners thereof, that is, a photosensitive pixel unit 202e, a photosensitive pixel unit 202i, and a photosensitive pixel unit 202 k; the dummy cell 203B has two photosensitive pixel cells 202 adjacent to the side surface thereof through which the dummy cell passes, i.e., a photosensitive pixel cell 202f and a photosensitive pixel cell 202 h.

For another example, referring to fig. 11 again, the photosensitive pixel unit group 201 includes three

vacant units

203A, 203B, and 203C, the

vacant units

203A, 203B, and 203C are only connected by connection points, photosensitive pixel units are disposed between the

vacant units

203A, 203B, and 203C, each of the vacant units 203 is adjacent to each of the vacant units 203 through a side surface and is a photosensitive pixel unit 202, the vacant unit 203A has four photosensitive pixel units 202 adjacent to each of the vacant units 203 through a side surface, and is a photosensitive pixel unit 202f, a photosensitive pixel unit 202g, a photosensitive pixel unit 202j, and a photosensitive pixel unit 202h, and has two photosensitive pixel units 202 connected to opposite corners thereof, and is a photosensitive pixel unit 202e and a photosensitive pixel unit 202 k; the dummy cell 203B has two photosensitive pixel cells 202 adjacent to the side surface thereof through which it passes, which are a photosensitive pixel cell 202f and a photosensitive pixel cell 202h, respectively; the dummy cell 203C has two photosensitive pixel cells 202 adjacent to the side surface thereof through which the dummy cell passes, that is, a photosensitive pixel cell 202g and a photosensitive pixel cell 202 j. In this way, the plurality of dummy cells 203 in one photosensitive pixel unit group 201 are separated by the plurality of photosensitive pixel units 202, so that the plurality of dummy cells 203 are discretely distributed among the plurality of photosensitive pixel units 202, and the light beam carrying the fingerprint information above any one of the dummy cells 203 can be received by the adjacent photosensitive pixel unit 202, thereby effectively avoiding the loss of the light beam carrying the fingerprint information during the transmission process.

In one implementation of the embodiment of the present application, as shown in fig. 14, the light beam carrying fingerprint information above the dummy cell 203 is incident on at least one photosensitive pixel cell 202 adjacent to the dummy cell 203 through the inclined light channel 102.

The inclined light channel 102 corresponds to the photosensitive pixel unit 202, and the light beam carrying the fingerprint information above the vacant unit 203 is incident through the inclined light channel 102 and then received by at least one photosensitive pixel unit 202 adjacent to the vacant unit 203.

For example, referring to fig. 16, the dummy unit 203 is located at the center, the two photosensitive pixel units 202 adjacent to the dummy unit 203 are a photosensitive pixel unit 202g and a photosensitive pixel unit 202h, respectively, and the light beam carrying the fingerprint information above the dummy unit 203 is received by the photosensitive pixel unit 202h adjacent to the dummy unit 203 through the inclined light channel 102.

In one embodiment of the present disclosure, in the photosensitive pixel unit group 201, a plurality of photosensitive pixel units 202 having the same pitch as the dummy units 203 are included, and the included angles θ of the light channels 101 corresponding to the plurality of photosensitive pixel units 202 having the same pitch as the dummy units 203 are all the same.

As shown in fig. 16, taking the empty unit 203 as the center, the light-sensitive pixel unit 202g and the light-sensitive pixel unit 202h have the same pitch as the empty unit 203, the light channels 101 corresponding to the light-sensitive pixel unit 202g and the light-sensitive pixel unit 202h are all the inclined light channels 102, and as shown in fig. 16, the included angle θ between the inclined light channels 102 corresponding to the light-sensitive pixel unit 202g is shown₃Angle θ 'of inclined light channel 102 corresponding to light-sensing pixel unit 202 h'₃Are equal.

It should be noted that, the transmission direction of the light beam carrying the fingerprint information in the photosensitive pixel unit group 201 in the light tunnel 101 can also refer to fig. 17, the dotted line with an arrow shown in fig. 17 indicates the transmission direction of the light beam passing through the light tunnel 101, the line beam starts from the direction close to the reader in the view direction, the arrow penetrates in the direction toward the paper surface in the direction shown, that is, the light beam of one photosensitive pixel unit 202 obliquely exits toward the center, and when the oblique angle is large enough, the light beam carrying the fingerprint information above the photosensitive pixel unit 202g is oblique toward the opposite side, and can pass above the vacancy unit 203 and be received by the photosensitive pixel unit 202 h.

For convenience of description and understanding, in fig. 17, at least two light shielding layers are illustrated above the optical sensor 200, light transmission holes are provided in each light shielding layer and the pixel unit of the optical sensor 200, a connection line of the two light shielding layers corresponding to the light transmission holes of the same pixel unit forms at least a part of the light channel 101, and the inclination of the light channel 101 is realized by a positional deviation of the two light shielding layers corresponding to the light transmission holes of the same pixel unit. In fig. 17, the circular holes with larger diameters are corresponding light-transmitting holes on the light-shielding layer far from the optical sensor 200, the circular holes with smaller diameters are corresponding light-transmitting holes on the light-shielding layer close to the optical sensor 200, and the arrow direction is the transmission direction of the light beam carrying the fingerprint information in the light channel 101.

The light beams carrying fingerprint information corresponding to the vacant cells 203 in the photosensitive pixel cell group 201 are transmitted to the photosensitive pixel cells 202 adjacent to the vacant cells 203, the light beams carrying fingerprint information corresponding to the vacant cells 203 shown in fig. 17 are transmitted to the photosensitive pixel cells 202h adjacent to the right side thereof, and the transmission direction of the space can be illustrated by referring to the light path shown in fig. 16; the corresponding light beam carrying fingerprint information on the vacant cell 203 can also be transmitted to the photosensitive pixel unit 202g on the left side thereof, as shown in fig. 18, and this transmission mode forms an optical path transmission schematic as shown in fig. 19; in addition, the corresponding light channel 101 on the vacant cell 203 may be tilted toward the other six light-sensitive pixel units 202 around the vacant cell 203, and when the vacant cell 203 has a plurality of tilted light channels 102 with different light directions, one or more of the light-sensitive pixel units 202 respectively receive the light beams carrying the fingerprint information transmitted above the vacant cell 203.

In one implementation of the embodiment of the present application, the plurality of photosensitive pixel cells 202 and the dummy cells 203 constituting the photosensitive pixel cell group 201 are arranged and combined in the form of M × N, where M is an integer greater than or equal to 1 and N is an integer greater than or equal to 2.

Illustratively, seven photosensitive pixel cells 202 and two dummy cells 203 shown in fig. 9 form one photosensitive pixel cell group 201, and the photosensitive pixel cell group 201 is presented in an arrangement combination of 3 × 3; the six photosensitive pixel cells 202 and the three dummy cells 203 in fig. 11 form one photosensitive pixel cell group 201, and the photosensitive pixel cell group 201 is presented in another 3 × 3 arrangement combination.

Where N is an integer greater than or equal to 2, and M is an integer greater than or equal to 1, that is, in the row-column arrangement of M and N, two cells are arranged in at least one direction of pixel units, that is, M and N cannot be simultaneously 1, and the photosensitive pixel unit group 201 of the embodiment of the present application does not include a 1 × 1 form, that is, does not include the photosensitive pixel unit group 201 having only one pixel unit.

N and M may be equal in value, such as 3 x 3 as exemplified above, although N and M may not be equal. When N and M are not equal, please refer to fig. 3 to 5, as shown in fig. 3, it can be regarded as a photosensitive pixel unit group 201, in the photosensitive pixel unit group 201, the dummy unit 203 and the photosensitive pixel unit 202 are shown in a combination of 2 × 3; referring again to fig. 7, fig. 7 may be viewed as a group 201 of photosensitive pixel cells, wherein the dummy cells 203 and the photosensitive pixel cells 202 are represented in a combination of 1 × 3; in addition, the photosensitive pixel unit groups 201 may be presented in different combinations of 2 × 5, 8 × 10, etc., which are not listed in this application.

It should be noted that, as already detailed in the foregoing description, on the optical sensor 200, the number of the dummy cells 203 is smaller than the number of the photosensitive pixel cells 202, and the number of the dummy cells 203 in one photosensitive pixel cell group 201 should not be generally more than the number of the photosensitive pixel cell groups 201 for the photosensitive pixel cell groups 201. For example, for a 3 × 3 photosensitive pixel cell group 201, the number of pixel cells inside the group is nine, and at most four of the pixel cells are used as the dummy cells 203, which may be represented by a combination of four dummy cells 203 and five photosensitive pixel cells 202; for another example, for a 2 × 3 photosensitive pixel unit group 201, as shown in fig. 5, the total number of internal pixel units is six, and at most three of the internal pixel units are regarded as the vacant units 203.

While the above description is made in terms of the number of pixel cells constituting the photosensitive pixel cell group 201, and the number of dummy cells 203 and photosensitive pixel cells 202 in the photosensitive pixel cell group 201, in an embodiment of the present embodiment, it can also be understood and defined in terms of the dimension of the area of the photosensitive pixel cell group 201, and the total area of the plurality of photosensitive pixel cells 202 in the photosensitive pixel cell group 201 is equal to or greater than the total area of the dummy cells 203.

In one photosensitive pixel unit group 201, the total area of all photosensitive pixel units 202 is greater than or equal to the total area of all vacant units 203, so that light beams carrying fingerprint information above the vacant units 203 can be ensured to be received by the photosensitive pixel units 202 in the group as far as possible, and loss in light beam transmission is reduced. It will also be appreciated that for an optical sensor 200 formed from a plurality of photosensitive pixel cell groups 201, the total area of all photosensitive pixel cells 202 is also equal to or greater than the total area of all vacant cells 203.

Corresponding to the number of the vacant cells 203 in one photosensitive pixel cell group 201 being not more than half of the total number of the cells of the photosensitive pixel cell group 201, the total area of all the vacant cells 203 in the photosensitive pixel cell group 201 is not more than half of the total area of all the photosensitive pixel cells 202, and the purpose is also based on the avoidance of the light beam carrying the fingerprint information above the vacant cells 203 being lost.

In the biological information identification module according to the embodiment of the application, the empty unit 203 is disposed between the plurality of photosensitive pixel units 202 of the optical sensor 200, the empty unit 203 does not need to receive the light beam above the empty unit 203, and the light beam above the empty unit can be received by other photosensitive pixel units 202, so that the position of the empty unit 203 can be used for disposing other corresponding structures to implement other functions on the optical sensor 200, and when other structures for implementing the functions are disposed on the empty unit 203, it can be understood that an area for disposing the structure needs to be additionally disposed on the optical sensor 200, so that the entire optical sensor 200 is compact in structure, and from another perspective, the space saved by removing other areas on the optical sensor 200 can be used for enlarging the photosensitive area, i.e. providing a larger area for arranging the photosensitive pixel units 202, under the condition that the size of the optical sensor 200 is not increased, the light sensing area of the optical sensor 200 is effectively enlarged, the cost of the module is reduced, the structural size utilization rate of the biological information identification module is maximized as far as possible, and more internal spaces are saved for electronic equipment adopting the biological information identification module.

In an implementation manner of the embodiment of the present application, the vacant unit 203 includes a first reserved area for arranging the circuit signal lines, and the electric signals are collected through the circuit signal lines arranged in the first reserved area, so that a routing area does not need to be arranged on the optical sensor 200 outside the original photosensitive area, and the structural size of the optical sensor 200 is saved.

In an implementation manner of the embodiment of the present application, the vacancy unit 203 may further include a second reserved area for disposing circuit elements, that is, the circuit elements are arranged in the vacancy unit 203, so as to implement corresponding functions of the circuit elements.

In the biological information recognition module according to the embodiment of the present invention, since the vacant cells 203 on the optical sensor 200 are usually discretely distributed in the vacant cells 203, the circuit signal lines and/or the circuit elements in the vacant cells 203 are arranged to facilitate electrical connection between the circuit signal lines and the circuit elements in the vacant cells 203, and in one embodiment of the present invention, the circuit signal lines and/or the circuit elements in the plurality of discrete vacant cells 203 may be electrically connected to each other by another conductive layer through vias.

Illustratively, an insulating layer and a conductive layer are further sequentially disposed on the back side of the optical sensor 200, a via hole is disposed through the optical sensor 200 and the insulating layer to communicate with the conductive layer, and two spaced vacant cells 203 communicate with the conductive layer through the via hole. Thus, the electrical connection between the circuit signal line and the circuit element can be achieved by the via hole communicating between the two spaced vacant cells 203.

Referring to fig. 20, the electronic device includes a display 300 and a biometric information recognition module disposed under the display 300.

The electronic device may be a common terminal device, such as a handheld display device like a mobile phone or a tablet computer, or a household liquid crystal display-type appliance like a television, a desktop computer, an air conditioner, or a refrigerator. In addition, this biological information discernment module is used for discerning the light beam that carries fingerprint information, and exemplarily, this light beam that carries fingerprint information can be palm line, palm vein, joint line etc. that come from human palm. For ease of understanding, the example of fingerprint recognition on a handheld display device is illustrated, which is common in real life.

As shown in fig. 20, a fingerprint identification area 301 is provided on the display screen 300, the fingerprint identification area 301 corresponding to the light-sensing area of the optical sensor 200, wherein the light beam from the fingerprint identification area 301 above the vacant cell 203 is received by the corresponding light-sensing pixel cell 202.

During specific operation, the user can place the carrier laminating that possesses individual fingerprint characteristics such as finger, palm in the fingerprint identification district 301 of display screen 300, take finger fingerprint identification under the screen as an example, shine on the finger line and the line characteristic of the finger position that reflects can carry the fingerprint information as with the line characteristic of the finger position of shining, the light beam that carries the fingerprint information is incident optical sensor 200 behind the light channel 101 of light path guide layer 100 in the biological information identification module, received by optical sensor 200's photosensitive pixel unit 202, be used for discerning user information. This application is through the light beam of carrying fingerprint information of vacant unit 203 top, can make the light beam of carrying fingerprint information of bigger area within range incide optical sensor 200, make electronic equipment receive more light signals that come from the fingerprint reflection, in order to acquire more fingerprint information, alright like this under the prerequisite of the fingerprint identification district 301 area that does not increase display screen 300, can effectively increase optical sensor 200's pixel acquisition scope, improve fingerprint information identification's discernment precision, can reduce electronic equipment's manufacturing cost simultaneously, reduce the volume of module, save more inner spaces for electronic equipment.

Besides the biological information identification module is integrated under the display screen 300, the biological information identification module can also be applied to other feasible scenes. For example, the biological information module can be disposed under a transparent protective glass plate or a protective film layer, so that the light beam carrying the fingerprint information is incident to the biological information identification module through the protective glass plate to be identified by the biological information identification module. This process has been described in any of the above embodiments and will not be described further herein.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The biological information identification module is characterized by being a fingerprint identification module, and comprising a light path guide layer and an optical sensor; the optical path guiding layer comprises a plurality of optical channels, and the optical sensor comprises a plurality of photosensitive pixel units and at least one vacant unit arranged among the photosensitive pixel units; and the light beam carrying fingerprint information above the vacant unit is received by the photosensitive pixel unit through the light channel.

2. The biological information recognition module of claim 1, wherein the light channel comprises an inclined light channel having an angle with a line perpendicular to a surface of the optical sensor; and the light beam carrying fingerprint information above the vacant unit is received by the photosensitive pixel unit through the inclined light channel.

3. The module according to claim 1 or 2, wherein the optical sensor comprises a plurality of the dummy cells, and the plurality of the dummy cells are discretely distributed in the plurality of the photosensitive pixel cells.

4. The biological information recognition module of any one of claims 1 to 3, wherein the shape of the dummy unit is the same as the shape of the photosensitive pixel unit; and/or the area of the vacant unit is the same as that of the photosensitive pixel unit.

5. The biological information recognition module of any one of claims 1 to 4, wherein the number of the dummy cells is smaller than the number of the photosensitive pixel cells.

6. The biological information recognition module of claim 2, wherein a plurality of the photosensitive pixel units and at least one of the dummy units constitute a photosensitive pixel unit group; and at least part of the light channels corresponding to the light-sensitive pixel units in the light-sensitive pixel unit group are the inclined light channels.

7. The biological information recognition module of claim 6, wherein the light channel corresponding to at least one of the light-sensitive pixel units in the light-sensitive pixel unit group that is symmetric with the center of the vacant unit is the inclined light channel.

8. The biological information recognition module of claim 6, wherein the center of the photosensitive pixel unit group is the vacant unit.

9. The module of claim 8, wherein the light channels corresponding to at least two of the light-sensitive pixel units symmetric about the empty unit intersect above the center.

10. The biological information recognition module of claim 6, wherein the plurality of dummy cells of the photosensitive pixel cell group are disposed between two of the dummy cells.

11. The module according to any one of claims 6 to 10, wherein the light beam above the vacant cell is incident on at least one photosensitive pixel cell adjacent to the vacant cell through the inclined light channel.

12. The module of claim 6, wherein the light channels corresponding to the light-sensitive pixel units with the same spacing as the empty unit in the light-sensitive pixel unit group have the same angle.

13. The biological information identification module according to any one of claims 6 to 12, wherein the plurality of photosensitive pixel cells and the dummy cells constituting the photosensitive pixel cell group are arranged and combined in a form of M × N, where M is an integer equal to or greater than 1 and N is an integer equal to or greater than 2.

14. The biological information identification module according to any one of claims 6 to 13, wherein a total area of a plurality of the photosensitive pixel cells in the photosensitive pixel cell group is equal to or larger than a total area of the dummy cells.

15. The biological information recognition module of any one of claims 1 to 14, wherein the dummy unit includes a first reserved area for arranging circuit signal lines.

16. The biological information recognition module of claim 15, wherein the vacant unit further comprises a second reserved area for disposing a circuit component.

17. The biological information recognition module of any one of claims 1 to 16, wherein an insulating layer and a conductive layer are sequentially disposed on a back side of the optical sensor, a via hole is disposed through the optical sensor and the insulating layer to communicate with the conductive layer, and two spaced vacant cells communicate with the conductive layer through the via hole.

18. An electronic device, comprising a display screen, and the biological information identification module according to any one of claims 1 to 17 disposed below the display screen.

19. The electronic device of claim 18, wherein a fingerprint identification area is disposed on the display screen, and light beams from the fingerprint identification area above the vacant cells are received by corresponding light-sensitive pixel cells through light channels.