CN113553925A

CN113553925A - Biological information identification module and electronic equipment

Info

Publication number: CN113553925A
Application number: CN202110768263.7A
Authority: CN
Inventors: 孙建成
Original assignee: Beijing Jihao Technology Co Ltd
Current assignee: Beijing Jihao Technology Co Ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2021-10-26

Abstract

The application provides a biological information identification module and electronic equipment, relate to electron device technical field, including light path guide layer and the photosensitive pixel array that sets gradually, light path guide layer is including a plurality of light channels, photosensitive pixel array includes a plurality of photosensitive pixel units, the light beam that carries biological information is the photosensitive pixel unit that the incidence corresponds behind the light channel respectively, wherein, light path guide layer includes central zone and the peripheral region around central zone, the contained angle has between peripheral zone's light channel and the first straight line of perpendicular to photosensitive pixel array surface. The biological information identification module can be designed through the module structure of the optical element to enlarge the range of biological information acquisition under the existing structure size, so that the accuracy of biological information identification is ensured and the structure size of the biological information identification module is reduced under the requirement of the existing biological information acquisition area.

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 terminal electronic equipment intellectualization which is mainly based on a handheld mobile terminal, the application of human body biological information identification in the electronic equipment is more and more deep and wide, and the electronic equipment is awakened through biological information identification unlocking in the past, and the identification, the identification authentication and the like of various software programs are gradually developed. With the wider application range of the biological information identification in the electronic equipment, the accuracy of the biological information identification and the identification capability and the identification speed of the electronic equipment, particularly the electronic equipment of the display type, for the fingerprint information are improved.

In the prior art, biological information identification, such as fingerprint identification, applied to electronic devices such as mobile phones and tablet computers, is mainly performed by optical fingerprint identification, in which a light source of a display panel irradiates a fingerprint and reflects the fingerprint, and an optical detection device receives, records or analyzes fingerprint reflected light carrying specific biological information to record the fingerprint or identify the specific fingerprint. In recent years, with the demand for miniaturization of electronic devices such as mobile phones and tablet computers, there has been an increasing demand for thinning and miniaturization of fingerprint recognition modules provided inside the electronic devices.

Usually, be applied to the fingerprint identification module under the display screen and need through receiving, 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, and in order to guarantee to biological information identification's accuracy, should guarantee at least in a less area within range to biological information's collection area on the display screen, use fingerprint identification as an example, should be generally more than 6 mm's scope, this structure that just leads to the fingerprint identification module is difficult to further reduce, thereby very big influence electronic equipment's miniaturization.

Disclosure of Invention

An object of the embodiment of the application is to provide a biological information identification module and electronic equipment, can realize through optical element's module structural design that biological information identification module enlarges the scope of drawing to biological information under current structural dimension to under current biological information acquisition area requirement, guarantee biological information identification's accuracy and reduce biological information identification module's structural dimension.

The embodiment of the application provides a biological information identification module, including light path guide layer and the photosensitive pixel array that sets gradually, light path guide layer is including a plurality of light channels, photosensitive pixel array includes a plurality of photosensitive pixel units, the light beam that carries biological information is the photosensitive pixel unit that the incidence corresponds behind the light channel respectively, wherein, light path guide layer includes central zone and the peripheral region around central zone, the contained angle has between peripheral region's light channel and the first straight line of perpendicular to photosensitive pixel array surface.

Optionally, the included angle of the plurality of optical channels in the peripheral region gradually increases along a direction in which the center of the optical path guiding layer points to the edge.

Optionally, the included angle of the plurality of optical channels in the peripheral region gradually increases with a fixed increase in a direction in which the center of the optical path guiding layer points to the edge.

Optionally, the fixed increase is from 0.05 ° to 2 °.

Optionally, the included angle of the plurality of optical channels in the peripheral region gradually increases with varying increments along the direction in which the center of the optical path guiding layer points to the edge.

Optionally, the increase in variation gradually decreases in a direction in which the center of the optical path guiding layer points to the edge.

Optionally, the plurality of light channels in the central region have the same angle with the first straight line, and/or the plurality of light channels in the peripheral region surrounding the central region have the same angle with the first straight line.

Optionally, the light channels within the width of one peripheral region correspond to 1-10 light-sensitive pixel cells in the light-sensitive pixel array.

Optionally, the center of the central region coincides with the center of the peripheral region; and/or the peripheral area is in a circular ring shape, a square ring shape, a triangular ring shape or a special-shaped ring shape.

Optionally, the plurality of light channels are arranged in a fan-shaped arrangement with the central region as a center on a longitudinal section through the central region.

Optionally, for at least part of the light channel, the channel aperture on the side far away from the photosensitive pixel array is greater than or equal to the channel aperture on the side near the photosensitive pixel array.

Alternatively, the channel aperture of the light channel gradually increases in the direction in which the light beam is incident on the light-sensitive pixel cell.

Optionally, the central axis of the light channel is a second straight line, and in a longitudinal section of the second straight line, the included angle between the two boundaries of at least part of the light channel and the first straight line is different.

Optionally, for at least a part of the light channels, a first boundary included angle of the light channel is smaller than a second boundary included angle, the first boundary included angle is an included angle between a boundary of the light channel close to the central region and the first straight line, and the second boundary included angle is an included angle between a boundary of the light channel far from the central region and the first straight line.

Optionally, the light channel of the central region has an angle with the first line, or the light channel of the central region is parallel to the first line.

Optionally, a plurality of collimating holes are disposed through the optical path guiding layer, and the plurality of collimating holes are respectively used as optical channels.

Optionally, the optical path guiding layer includes a microlens array and at least one diaphragm layer disposed below the microlens array, a plurality of diaphragm holes through which light beams can penetrate are distributed on the diaphragm layer, the microlens array includes a plurality of microlens units, and the microlens units and the diaphragm holes corresponding to the microlens units serve as optical channels.

Optionally, the optical path guiding layer includes a plurality of layers of diaphragm layers disposed at intervals along the optical transmission direction, a plurality of diaphragm holes permeable to light beams are distributed on the diaphragm layers, and the diaphragm holes corresponding to the positions on the plurality of layers of diaphragm layers form at least a part of the optical channel.

Optionally, the distance between two adjacent diaphragm layers is greater than or equal to 5 micrometers.

Optionally, the light passage in the peripheral region has an included angle of 60 ° or less.

Optionally, the light passage in the peripheral region has an included angle of 10 ° to 45 °.

Optionally, the device further comprises an optical sensor, and the photosensitive pixel array is integrated in a photosensitive identification area of the optical sensor.

Optionally, the optical sensor includes a metal structure layer, and the optical path guiding structure further includes a metal light shielding layer, where the metal light shielding layer multiplexes the metal structure layer on the optical sensor; at least one metal shading layer is correspondingly provided with a light transmission part to form a light channel.

Optionally, the multiplexed metallic structural layer comprises 2-5 layers.

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 biological information identification area for acquiring a light beam carrying biological information is preset on the display screen, and the area of the biological information identification area is larger than the light beam receiving area of the light sensing pixel array in the biological information identification module.

The biological information identification module that this application embodiment provided, including light path guide layer and the photosensitive pixel array that sets gradually, the light path guide layer is including a plurality of light channels, photosensitive pixel array includes a plurality of photosensitive pixel units, the light beam that carries biological information is the corresponding photosensitive pixel unit of incidence behind the light channel respectively, wherein, light path guide layer is including central zone and the peripheral region around central zone, the contained angle has between peripheral region's light channel and the first straight line of perpendicular to photosensitive pixel array surface. Through the guide effect with the light channel that has the contained angle between the first straight line, can make the light beam incident photosensitive pixel array of carrying biological information of bigger area within range, under the unchangeable condition of area of photosensitive pixel array promptly, the biological information acquisition area of display screen has been increased for biological information acquisition area is greater than photosensitive pixel array's photosensitive area, and then makes the biological information identification module of this application embodiment can receive more light signals, thereby obtains more biological information. On the other hand, under the condition that need not increase the biological information acquisition area of display screen, the effectual photosensitive region area that has reduced photosensitive pixel array's volume, reduces the cost of module, and the efficient utilizes the structure size of module, and then saves more inner spaces for the electronic equipment who adopts the biological information identification module of this application embodiment.

On the other hand, for fingerprint identification, when a dry finger is placed on the surface of the display screen, the contact area between the dry finger and the surface of the display screen is small, and the pasting effect between the skin of the dry finger and the display screen is relatively poor, which not only results in the contact area being reduced, but also results in that for signals which can only be vertically received, the signals of the vertical reflected light beam carrying fingerprint information received on the photosensitive pixel array are weaker, which results in poor identification effect for the dry finger, and identification failure often occurs, by adopting the biological information identification module of the embodiment of the application, through the guiding effect of the optical channel with an included angle with the first straight line, a part of inclined optical signals from the identification object which is not in contact with the screen can be incident to the photosensitive pixel array to enable the photosensitive pixel array to receive more optical signals carrying biological information, the recognition effect of the dry finger in fingerprint recognition is effectively improved.

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 second schematic structural diagram of a biological information identification module according to an embodiment of the present disclosure;

fig. 3 is a third schematic structural diagram of a biological information identification module according to an embodiment of the present disclosure;

FIG. 4 is a fourth schematic view illustrating a biological information recognition module according to an embodiment of the present disclosure;

fig. 5 is a fifth schematic structural view of a biological information recognition module according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram illustrating an angle relationship between optical channels of the biological information recognition module according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of another view angle of a biological information identification module according to an embodiment of the present disclosure;

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

fig. 9 is a seventh schematic structural diagram of a biological information recognition module according to an embodiment of the present application;

FIG. 10 is a schematic structural diagram of an optical sensor in a biological information identification module according to an embodiment of the present disclosure;

fig. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Icon: 10-an optical path guiding layer; 101-a central region, 102-a peripheral region; 11-an optical channel; 110-a metallic light-shielding layer; 111-a light-transmitting portion; 12-a base structure layer; 121-collimation holes; 13-a microlens array; 131-a microlens unit; 14-a diaphragm layer; 140-diaphragm aperture; 20-an array of photosensitive pixels; 201-light-sensitive pixel cell; 30-a display screen; 301-biological information identification area; a 20-optical sensor; a1-metal structure layer; a-a photosensitive identification area; d, the distance between the upper surface of the display screen and the photosensitive pixel array; h-the distance between two adjacent diaphragm layers; l-the side length of the photosensitive pixel array; w is the area of the biological information identification area; d1 — channel aperture on the side of the light channel away from the array of light-sensitive pixels; d 2-channel aperture on the side of the light channel near the array of photosensitive pixels; the angle between the alpha-light channel and a first line perpendicular to the surface of the light-sensitive pixel cell 2.

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.

Based on this, an embodiment of the present application provides a biological information identification module, fig. 1 is a schematic structural diagram of a biological information identification module provided in an embodiment of the present application, as shown in fig. 1, the biological information identification module includes an optical path guiding layer 10 and a photosensitive pixel array 20 that are sequentially disposed, the optical path guiding layer 10 includes a plurality of optical channels 11, the photosensitive pixel array 20 includes a plurality of photosensitive pixel units 201, and light beams carrying biological information respectively enter the corresponding photosensitive pixel units 201 after passing through the optical channels 11, wherein the optical path guiding layer 10 includes a central region 101 and a peripheral region 102 surrounding the central region 101, and an included angle is formed between the optical channel 11 of the peripheral region 102 and a first straight line perpendicular to a surface of the photosensitive pixel array 20.

As shown in fig. 1, an optical path guiding layer 10 and a photosensitive pixel array 20 are sequentially disposed along a direction of transmission of a light beam carrying biological information, the optical path guiding layer 10 includes a plurality of light channels 11, typically, the plurality of light channels 11 are arranged on the optical path guiding layer 10 in a matrix form, each light channel 11 is capable of allowing the light beam carrying biological information to pass through, the photosensitive pixel array 20 includes a plurality of photosensitive pixel units 201, the plurality of photosensitive pixel units 201 are also arranged in a matrix form, for example, the photosensitive pixel array 20 may be a sensing device such as an optical sensor capable of receiving the light beam and analyzing and processing the biological information carried in the light beam, each photosensitive pixel unit 201 of the photosensitive pixel array 20 is capable of receiving and correspondingly processing the incident light beam carrying biological information, a surface of the photosensitive pixel array 20 is generally a plane, a plane formed by arranging a plurality of photosensitive pixel units 201 in a matrix form serves as a photosensitive area of the photosensitive pixel array 20.

The light beams carrying biological information guided through the plurality of light channels 11 are incident on the light-sensitive pixel cells 201, as shown in figure 1, a central region 101 and a peripheral region 102 surrounding the central region 101 are divided on the optical path guiding layer 10, wherein the light channel 11 in the peripheral region 102 has an angle alpha with a first line perpendicular to the surface of the light-sensitive pixel cell 201, that is, when the biometric information recognition module according to the embodiment of the present application is disposed as shown in fig. 1, the light tunnel 11 located in the peripheral region 102 is inclined, and thus, under the condition that the range of the photosensitive area of the photosensitive pixel array 20 is not changed, because the light channel 11 is in the inclined state, the light incidence range of the light beam carrying the biological information can be increased, that is, the photosensitive pixel array 20 can receive more light beams carrying the biological information.

In the embodiment of the present invention, the optical channel 11 is not limited to the form shown in fig. 1, the optical channel 11 serves as an optical element for transmitting the light beam carrying the biological information to the photosensitive pixel array 20, and the implementation form thereof may be various, and the embodiment of the present invention is not specifically limited herein as long as the light beam carrying the biological information can be transmitted and finally transmitted to the photosensitive pixel array 20. In addition, in order to enable as many light beams carrying biological information as possible to be received by the photosensitive pixel array 20, the light channel 11 of the peripheral region 102 is in a tilted state, so that for the biological information collecting region of the display screen, the boundary of the region can be enlarged according to the tilted angle, and the area of the biological information collecting region can be enlarged to a certain extent.

Wherein, the biological information that the biological information identification module of this application embodiment is used for discernment can include the fingerprint identification on handheld display device such as common cell-phone, panel computer among the relevant technology, still include the palm line, palm vein or the joint line discernment to the human palm that adopt on other electronic equipment, for example again, can also include the discernment to information such as wrist department's vein, line in the wearing equipment. For ease of understanding and explanation, the following description will take the example of fingerprint recognition on a handheld display device, which is common in real life.

In addition, in the embodiment of the present application, the division between the central region 101 and the peripheral region 102 is not specifically limited, the central region 101 at least includes a geometric center position of a solid structure supported by the optical path guiding layer 10, and the peripheral region 102 is disposed around the central region 101, and a person skilled in the art may specifically set parameters of a mutual relationship, such as an area ratio of the central region 101 and the peripheral region 102, according to needs, for example, the central region 101 is reduced to almost include only a geometric center point, or the central region 101 may be expanded, so that a larger region including the geometric center is the central region 101. Similarly, the peripheral region 102 is disposed around the central region, and the surrounding shape and the number of surrounding layers of the peripheral region 102, whether or not other regions are disposed besides the central region 101 and the peripheral region 102, and the like, can be specifically designed and disposed according to actual needs.

It should be noted that, in the biological information identification module according to the embodiment of the present application, how the light path 11 of the central region 101 of the light path guiding layer 10 is disposed, and whether there is an inclination angle is not specifically limited herein, and is not intended to limit the conditions and constraints for implementing the present solution.

The biological information identification module that this application embodiment provided, including light path guide layer 10 and the photosensitive pixel array 20 that sets gradually, light path guide layer 10 is including a plurality of light channels 11, photosensitive pixel array 20 includes a plurality of photosensitive pixel unit 201, the light beam that carries biological information is the corresponding photosensitive pixel unit 201 of incidence after light channel 11 respectively, wherein, light path guide layer 10 is including central zone 101 and the peripheral region 102 that centers on central zone 101, contained angle alpha has between the light channel 11 of peripheral region 102 and the first straight line of perpendicular to photosensitive pixel array 20 surface. Through the guide effect with the light channel that has the contained angle between the first straight line, can make the light beam incident photosensitive pixel array that carries biological information of bigger area within range, under the unchangeable condition of photosensitive pixel array 20's area promptly, the biological information acquisition area of display screen has been increased for biological information acquisition area is greater than photosensitive pixel array 20's area, and then makes the biological information identification module of this application embodiment can receive more light signals, thereby obtains more biological information. On the other hand, under the condition that need not increase the biological information acquisition area of display screen, the effectual photosensitive region area that has reduced photosensitive pixel array 20's volume, reduces the cost of module, and the efficient utilizes the structure size of module, and then saves more inner spaces for the electronic equipment who adopts the biological information identification module of this application embodiment.

On the other hand, for fingerprint identification, when a dry finger is placed on the surface of the display screen, the contact area between the dry finger and the surface of the display screen is small, and the attaching effect between the skin of the dry finger and the display screen is relatively poor, which not only results in the contact area being reduced, but also results in that for signals which can only be vertically received, the signals of the vertical reflected light beam carrying fingerprint information received on the photosensitive pixel array 20 are also weak, which results in poor identification effect for the dry finger, and identification failure often occurs, by adopting the biological information identification module of the embodiment of the present application, through the guiding effect of the optical channel 11 having the included angle α with the first straight line, a part of inclined optical signals from the identification object which is not in contact with the screen can be made to carry biological information to enter the photosensitive pixel array 20, so that more optical signals carrying biological information are received in the photosensitive pixel array 20, the recognition effect of the dry finger in fingerprint recognition is effectively improved.

In an alternative implementation manner of the embodiment of the present application, as shown in fig. 1, the optical path guiding layer 10 is a base structure layer 12, the base structure layer 12 is provided with a plurality of collimating holes 121, and the collimating holes 121 are respectively used as optical channels 11 for guiding the light beam carrying the biological information to the corresponding photosensitive pixel units 201.

As shown in fig. 1, the base structure layer 12 is made of a conventional base material, since the base structure layer 12 is mainly configured to form a structure of the collimating holes 121, and the base structure layer 12 itself does not need to function, in the embodiment of the present invention, the material of the base structure layer 12 is not specifically limited, and in general, the base structure layer 12 itself has a certain thickness, a plurality of through collimating holes 121 are formed on the base structure layer 12, and the light path direction of the light channel 11 (the collimating holes 121) can be determined by the arrangement position and the through arrangement direction angle of the collimating holes 121 on the base structure layer 12, so that, when the biological information identification module of the embodiment is used for fingerprint identification under a display screen, when a finger is placed on a drawing area on the display screen, an outgoing light beam irradiates and reflects on the finger, since fingerprints on human fingers are different, the light beam irradiating the finger and reflecting carries the information of the valley or ridge at a specific position on the fingerprint, or further includes other fingerprint characteristic information for reflection, and the reflected light beam carrying the fingerprint information can be accurately guided to the photosensitive pixel unit 201 corresponding to the light channel where the collimating hole 121 is located on the photosensitive pixel array 20 from the collimating hole 121 after passing through the collimating hole 121.

Since the light beams passing through the alignment holes 121 need to carry biological information for effective identification on the photosensitive pixel array 20, in order to avoid mutual influence of the light beams between the adjacent alignment holes 121, for example, the base structure layer 12 may be made of black or dark material, so that the light beams cannot propagate and influence each other in the base structure layer 12, and the light beams can only be transmitted through the alignment holes 121, for example, the base structure layer 12 itself may also be made of a light-permeable material, but a light-shielding film layer is formed on the inner wall of each alignment hole by coating, deposition or other methods, so as to avoid mutual cross influence of the light beams between the adjacent alignment holes 121.

Thus, as shown in fig. 1, under the condition that the size of the biological information collecting area on the display screen is not changed, the inclined light channel in the peripheral area 102 enables not only the light beam carrying the fingerprint information in the biological information collecting area to vertically enter the light guiding layer 10 and be extracted and recorded with the fingerprint information, but also the outer edge of the biological information collecting area to be expanded properly when collecting the fingerprint, so that a part of the light beam which is not vertically incident but is not far from the biological information collecting area can be incident into the photosensitive area of the photosensitive pixel array 20 to be collected and recorded, and the part of the light beam which is not originally incident and collected can enter the photosensitive pixel array 20 of the biological information identification module according to the embodiment of the present invention, make under the prerequisite that does not increase the regional area of biological information acquisition of display screen, can reduce the photosensitive area of photosensitive pixel array 20 and receive with the light beam that carries biological information of preceding equal quantity, from another angle, also can understand, if do not reduce the photosensitive area of photosensitive pixel array 20, the incident scope and the quantity of the light beam that carries fingerprint information can effectual improvement to the biological information identification module of this application embodiment, and then improve fingerprint identification's accuracy and identification efficiency.

First, the material of the base structure layer 12 is selected to have strong structural stability and will not easily react with other structures, and once the optical channel 11 with the collimating hole 121 is established, the change of the tilt angle will not easily occur, and the deformation of the optical channel 11 due to long time or artificial external factors will not easily occur. The thickness of the base structure layer 12 is utilized to enable the collimating holes 121 to determine the direction of the light beam passing through the collimating holes 121 and the position of the light beam exiting to the specific photosensitive pixel unit 201 according to the position and the inclination angle of the light beam passing through the collimating holes 121 on the base structure layer 12.

Fig. 2 is a second schematic structural diagram of a biological information identification module according to an embodiment of the present disclosure, in an alternative implementation manner of the embodiment of the present disclosure, as shown in fig. 2, the optical path guiding layer 10 includes a microlens array 13 and at least one diaphragm layer 14 disposed below the microlens array 13, a plurality of diaphragm holes 140 capable of transmitting light beams are distributed on the diaphragm layer 14, the microlens array 13 includes a plurality of microlens units 131, and the diaphragm holes 140 corresponding to the microlens units 131 serve as the optical channels 11.

As shown in fig. 2, for each optical channel 11, including the microlens unit 131 for combining to form the microlens array 13 and the diaphragm aperture 140 of at least one layer corresponding to the microlens unit 131 on the light exit side of the microlens unit 131, the light beam carrying the biological information first passes through the microlens unit 131, the microlens unit 131 can converge and guide the light beam to a certain extent, and the light beam is converged itself, so that as many light beams as possible can be converged to be guided into the light-sensitive pixel unit 201. The converged light beam enters the photosensitive pixel unit 201 after passing through the diaphragm aperture 140, and the light beam carrying the biological information needs to pass through the microlens unit 131 and the at least one diaphragm aperture 140 in sequence, so the light channel 11 is formed therein, and the inclination angle of the light channel 11 is the included angle α between the connecting line between the main optical axis of the microlens unit 131 and the center of the diaphragm aperture 140 and the first straight line.

In this embodiment, the adjustment of the included angle α of the optical channel 11 can be realized by adjusting the change of the projection relationship between the microlens unit 131 and the diaphragm aperture 140, and the direction and angle of the included angle α of the optical channel 11 can be changed by adjusting the relative positional relationship between the microlens unit 131 and the diaphragm aperture 140.

Fig. 3 is a third schematic structural diagram of the biological information identification module according to the embodiment of the present application, as shown in fig. 3, in an alternative embodiment, as shown in the schematic structural diagram of fig. 3, the aperture layer 14 is provided with three layers, and the three layers of aperture layers 14 respectively have one aperture hole 140 corresponding to each other and form the optical channel 11 together with the microlens unit 131.

The aperture layer 14 forming the light channel 11 includes three layers, wherein, as a result of the light channel 11 being inclined, the microlens units 131 in the microlens array 13 and the aperture holes 140 of each layer in the multi-layer aperture layer 14 are required, and the inclination angle of the light channel 11, that is, the included angle α between the light channel 11 and the first line perpendicular to the surface of the microlens array 13, is adjusted by adjusting the positional relationship between the microlens units 131 and the aperture holes 140 of each layer, which correspond to each other to form the same light channel 11.

Of course, fig. 3 is only an example of an exemplary nature, and is not to be considered as the only supported implementation form in the present solution and the limitation to the present solution, in the present application, the diaphragm layer 14 may also be provided with one layer, two layers, four layers, five layers, or the like.

It should be noted that in another possible implementation manner of the embodiment of the present application, the central axis of the light tunnel 11 is in the second straight line. For example, as shown in fig. 3, when the optical channel 11 can be formed only if nodes of more than two elements need to be arranged and connected to each other, there is only one straight line between two points, and when there are three or more points, it is difficult to ensure that the second straight line as shown in fig. 3 is formed by connecting in sequence, for example, there is a possibility of a state of a broken line (one straight line between every two nodes, and slopes of the two straight lines are different, thereby forming a broken line), compared with, especially, when the number of the connection nodes of the optical channel 11 is more than three, it is preferable that the central axis of the optical channel 11 formed by a plurality of the connection nodes is a straight line, when the connection line of the nodes forming the central axis of the optical channel 11 is the second straight line, the consumption of the light beam carrying the biological information in the optical channel 11 is minimized, that is, as many light beams carrying the biological information as possible can enter the microlens array 13 and then be received by the photosensitive pixel unit 201.

In an alternative embodiment, the microlens units 131 and the light channels 11 correspond one-to-one. That is, each optical channel 11 corresponds to one microlens unit 131, as shown in fig. 2, one microlens unit 131 is included in the range of one optical channel 11, light beams carrying biological information passing through the same microlens unit 131 correspondingly enter the aperture 140 of one optical channel 11, and correspondingly are guided to one corresponding photosensitive pixel unit 201, so that the photosensitive pixel unit 201 accurately and correspondingly receives the light beams in all angular directions.

In another alternative embodiment, the corresponding relationship in the optical channel 11 may also be set such that a plurality of microlens units 131 correspond to one optical channel 11, or one microlens unit 131 corresponds to a plurality of optical channels 11, respectively. That is, a plurality of microlens units 131 may be included in the range of each light channel 11, and multiple light beams carrying biological information passing through the plurality of microlens units 131 are incident into the aperture hole 140 of one light channel 11 and are guided to the photosensitive pixel units 201 correspondingly, so as to fully utilize the receiving capability of each photosensitive pixel unit 201. Or, it may be that the same microlens unit 131 corresponds to multiple optical channels 11 at the same time, because the microlens unit 131 has a certain light beam converging capability, and the light beams passing through the same microlens unit 131 have a certain difference in outgoing angle due to different incident angles, one microlens unit 131 corresponds to the diaphragm holes 140 of multiple optical channels 11 to guide the light beams carrying biological information to multiple photosensitive pixel units 201 which are the same or different, so as to further improve the collection capability of the optical channels 11 for the light beams carrying biological information, and reduce the loss of the light information in the transmission process.

In addition, the biological information identification module according to the embodiment of the present application does not have a unique limitation on the correspondence relationship between the light channel 11 and the photosensitive pixel unit 201 in the photosensitive pixel array 20, for example, each light channel 11 may be directly corresponding to one photosensitive pixel unit 201 in the photosensitive pixel array 20, and then the light beam carrying the biological information passing through the light channel 11 is uniquely incident on the photosensitive pixel unit 201. Alternatively, the light exit of each light tunnel 11 may correspond to a plurality of light-sensitive pixel units 201, so that the light beams carrying biological information emitted from the light exit of the light tunnel 11 are respectively received by the plurality of light-sensitive pixel units 201 in a matching manner, and for example, a plurality of light tunnels 11 adjacent to each other may correspond to one light-sensitive pixel unit 201, and the one light-sensitive pixel unit 201 simultaneously receives the light beams carrying biological information emitted from the plurality of light tunnels 11, which is an example of some possible embodiments.

Fig. 4 is a fourth schematic structural diagram of a biological information identification module according to an embodiment of the present application, as shown in fig. 4, in an alternative implementation, the optical path guiding layer 10 includes multiple layers of diaphragm layers 14 disposed at intervals along the optical transmission direction, multiple diaphragm holes 140 that can transmit light beams are distributed on the diaphragm layers 14, and the diaphragm holes 140 corresponding to the multiple layers of diaphragm layers 14 form at least a part of the optical channel 11.

It should be noted that the stop holes 140 corresponding to the positions on the multilayer stop layer 14 form at least a part of the optical channel 11, where two schemes are included, one of which represents that the multilayer stop layer 14 itself is a component of the optical channel 11, and the multilayer stop layer 14 forms the optical channel 11 in this embodiment, and does not include any other structure, that is, the structure shown in fig. 4; secondly, the optical channel 11 is formed by the multi-layer aperture layer 14 and other structures such as the combination structure of the microlens array 13 and the aperture layer 14, or the collimating hole 121 of the base structure layer 12, so that the multi-layer aperture layer 14 is only a part of the whole optical channel 11, and fig. 5 is a fifth schematic structural view of the biological information identification module according to the embodiment of the present application, as shown in fig. 5. The following description will be made separately.

First, the diaphragm aperture 140 of the multi-layer diaphragm layer 14 is taken as an example of the whole light channel 11. As shown in fig. 4, the light channel 11 is formed by combining three corresponding diaphragm holes 140 in three diaphragm layers 14, and the connecting lines of the centers of the three corresponding diaphragm holes 140 in the three diaphragm layers 14 are inclined straight lines, so that the formed light channel 11 presents the same inclination state, and light beams carrying biological features sequentially pass through the light channel 11 formed by the three diaphragm holes 140 and then enter the corresponding photosensitive pixel unit 201.

Next, the diaphragm aperture 140 of the multilayer diaphragm layer 14 is only a part of the light path 11. The light channel 11 in this case also includes any one of the aforementioned structures forming the light channel 11, for example, a combination of the collimating hole 121, the microlens unit 131, and the diaphragm layer 14, or a combination thereof, or the like, so as to collectively form the light channel 11. Specifically, as shown in fig. 5, the optical channel 11 is formed by a collimating hole 121 on the base structure layer 12 and three corresponding diaphragm holes 140 in the three diaphragm layers 14, and light beams carrying biological features pass through the optical channel 11 and need to pass through the collimating hole 121 and the three diaphragm holes 140 in sequence, where an inclination angle of the collimating hole 121 is the same as an inclination angle of a central connecting line between the three corresponding diaphragm holes 140 in the three diaphragm layers 14, and the common connecting line forms an included angle α of the optical channel 11.

In addition, the light channel 11 may also be formed by the aforementioned other structures and the plurality of diaphragm holes 140, and the purpose of the composition thereof is the same as that of the aforementioned examples, and will not be described herein again.

In an alternative implementation of the embodiment of the present application, as shown in fig. 4, the distance H between two adjacent diaphragm layers 14 is greater than or equal to 5 μm.

For the embodiment in which the plurality of diaphragm layers 14 are combined to form the light channel 11, the projection position relationship between the diaphragm holes 140 on the diaphragm layers 14 at different levels is adjusted, so that the central line of the diaphragm holes 140 at the different levels forms the central axis of the light channel 11, therefore, if the distance H between two adjacent diaphragm layers 14 is too small, more diaphragm layers 14 need to be further arranged, otherwise, it is difficult to form the light channel 11 with the light path guiding function between two diaphragm layers 14 at a close distance, and therefore, the distance H between two adjacent diaphragm layers 14 is greater than or equal to 5 micrometers, so as to ensure the guiding capability of forming corresponding light beams between the corresponding diaphragm holes 140 in the two diaphragm layers 14.

In an alternative implementation of the embodiment of the present application, the angle of the included angle α of the light channel 11 gradually increases from the central region 101 to the peripheral region 102.

Taking the optical channel 11 formed by three corresponding aperture holes 140 in the three aperture layers 14 as an example, as shown in fig. 4, an included angle α exists between the main optical axis of each optical channel 11 in fig. 4 and a first line perpendicular to the photosensitive pixel array 20, and this included angle α can reflect the inclination angle of the light beam passing through this optical channel 11 to the photosensitive pixel unit 201, where the included angle α of the optical channel 11 corresponding to the central region 101 of the optical path guiding layer 10 is smaller, and the included angle α is gradually increased when the central region 101 points to the peripheral region 102. The smaller the angle of the included angle α, the higher the perpendicularity of the light beam reaching the photosensitive pixel unit 201 through the light channel 11, the higher the perpendicularity of the light beam received by the photosensitive pixel unit 201 corresponding to the central region 101 of the light path guiding layer 10, the better acquisition and analysis value of the received biological characteristic information pointing to the peripheral region 102, the gradually increased angle of the included angle α, although the perpendicularity of the light beam is reduced, the biological information in the biological information acquisition region as large as possible can be included, the acquisition range of the biological information is improved, and the light channel 11 with the structure can enable the photosensitive pixel array 20 to obtain better light beam signals, so that more comprehensive and accurate biological information can be analyzed and acquired.

In an alternative implementation of the embodiment of the present application, the light channel 11 of the central region 101 has an angle α with a first line perpendicular to the surface of the photosensitive pixel array 20, that is, the light channel 11 of the central region 101 has an angle α, for example, 0.1 °, 0.05 °, under the condition that the angle α of the light channel 11 is gradually increased from the central region 101 to the peripheral region 102.

Alternatively, in another alternative implementation of the embodiment of the present application, as shown in fig. 4, the light channel 11 of the central region 101 is parallel to a first straight line perpendicular to the surface of the photosensitive pixel array 20, that is, the light beam carrying the biological information, which reaches the photosensitive pixel unit 201 through the light channel 11 of the central region 101, is incident on the photosensitive pixel unit 201 at a perpendicular angle. In the foregoing description, it has been mentioned that when the light beam carrying the biological information enters the photosensitive pixel unit 201, the higher the perpendicularity between the light beam carrying the biological information and the photosensitive pixel unit 201 is, the more accurate the biological information received by the photosensitive pixel unit 201 is, and the influence of reflection, glare and the like on the light information received and analyzed by the photosensitive pixel unit 201 can be reduced, and details are not described herein. That is to say, in this way, for the central region 101, the light channel 11 adopts the included angle α as small as possible (the included angle α is 0 ° in the limit state, that is, it can be understood that there is no included angle α at this time, and the light channel 11 is parallel to the first straight line), so as to ensure the sufficiency and accuracy of the biometric information acquisition, and for the peripheral region 102, the light channel 11 is set to have the included angle α with a certain angle, so as to effectively enlarge the area of the biometric information acquisition region that can be received by the photosensitive region of the photosensitive pixel array 20, thereby acquiring biometric information in a wider range, and improving the identification accuracy.

In an alternative implementation of the embodiment of the present application, the included angle α of the plurality of light channels 11 of the peripheral region 102 gradually increases along the direction from the center to the edge of the light path guiding layer 10.

Still referring to fig. 4, the light paths 11 corresponding to the peripheral region 102 in fig. 4 include a plurality of light paths 11, the included angles α of the plurality of light paths 11 are different, and the included angles α of the plurality of light paths 11 gradually increase along the direction in which the center of the light path guiding layer 10 points to the edge, that is, the included angle α of the light path 11 closer to the edge is larger.

On the basis, in an alternative implementation manner of the embodiment of the present application, the included angle α of the included angles α of the plurality of light channels 11 in the peripheral region 102 gradually increases with a fixed increase along the direction from the center of the light path guiding layer 10 to the edge.

For example, fig. 6 is a schematic diagram of the relationship between the included angle of the optical channel 11 of the biological information identification module according to the embodiment of the present application, as shown in fig. 6, the included angle α between the optical channel 11 and the first line perpendicular to the surface of the photosensitive pixel array 20 tends to gradually increase along the direction indicated by the double-headed arrow in fig. 6, i.e. along the direction from the center to the edge of the optical path guiding layer 10. For example, when the light channels 11 of the central region 101 are parallel to a first line perpendicular to the surface of the photosensitive pixel array 20, that is, the light channels 11 of the central region 101 have no angle α, it can be understood that the angle α of the light channels 11 of the central region 101 is 0, and assuming an increase of 2 °, the angle α of the first light channel 11 adjacent to the light channel 11 of the central region 101 is 2 °, the angle α of the second light channel 11 is 4 °, the angle α of the third light channel 11 is 6 °, and so on, in the direction indicated by the double-headed arrow, until the angle α of one light channel 11 at the outermost edge of the peripheral region 102 is the largest angle of all the angles. It will also be understood that in this case the light tunnel 11 points in the direction of the edge along the center 10 of the light path guiding layer, the angle a increasing stepwise with a fixed increase.

For example, in one embodiment, the maximum included angle α of the light path 11 at the outermost edge of the peripheral region 102 is 45 °, and the number of photosensitive pixel units on the photosensitive pixel array 20 is 300 × 300, so that the fixed increase of the included angle α of the light path 11 corresponding to each photosensitive pixel unit 201 may be set to 45/150 ═ 0.25, that is, the fixed increase of the included angle α between two adjacent light paths 11 along the direction from the center of the light path guiding layer 10 to the edge is 0.25 °.

Of course, the stepping fixed value in the above example is 2 °, in fact, for a precise biological information identification module, to accurately acquire biological information carried in a light beam and identify and confirm, the number of the optical channels 11 is very large and the arrangement is dense, in an actual arrangement, the stepping angle amplification is obviously much smaller than 2 °, in general, the smaller the stepping angle amplification is, after the light-sensitive pixel array 20 receives the light beam carrying the biological information, the difficulty of splicing and analyzing the biological information received by each light-sensitive pixel unit 201 can be effectively reduced, thereby reducing the loss of the biological information, and improving the integrity of information acquisition and the accuracy of biological information identification. Thus, in an alternative embodiment of the present application, the fixed amplification is chosen between 0.05 ° and 2 °.

In another alternative embodiment of the present application, the included angle α of the plurality of light channels 11 of the peripheral region 102 gradually increases with varying increments along the direction from the center to the edge of the optical path guiding layer 10.

Still taking fig. 6 as an example, in the present embodiment, along the direction of the double-headed arrow in fig. 6, the included angle α of the optical channel 11 gradually increases with a varying increment, that is, the angle difference between the included angles α of two adjacent optical channels 11 is not equal. For example, 0 °, 1 °, 3 °, 6 °, … …, of course, in order to obtain complete and easy-to-splice beam composition images with biological information, even with variable amplification, certain regularity should be satisfied as much as possible, and the information loss of this part caused by too large angle difference between the included angles α of any two adjacent optical channels 11 should be avoided.

Also, as shown in fig. 6, normally, the perpendicularity of the light tunnel 11 near the central region 101 is high, taking fingerprint recognition as an example, in the light beam passing through the light tunnel 11 close to the central area 101, the fingerprint information is carried in the central position of the whole finger, relatively speaking, these beams are rich in fingerprint information to be carried, and the closer to the edge of the peripheral area 102, the fingerprint information carried in the light beam in the light channel 11 is at the position of the edge of the finger, the difficulty of these light beams carrying fingerprint information themselves is high, and the path through the optical channel 11 is also long, this portion of the beam is relatively more prone to problems of less carrying of fingerprint information and loss of fingerprint information, and therefore, when the angle of the included angle alpha of the light tunnel 11 increases gradually with varying increments in the direction of the double arrow in figure 6, the varying amplification may be selected in such a way that it gradually decreases in the direction from the center of the optical path guiding layer 10 toward the edge.

As an example, the included angle α of the light channel 11 in the central area is 1 °, the included angle α of the first light channel 11 in the direction of the double arrow is 4 °, that is, the variation value between the two is 3 °, the included angle α of the next light channel 11 is 2 °, the variation value is 2 °, the included angle α of the next light channel 11 is 1 °, the variation value is 1 °, and so on. Therefore, the closer to the edge of the biological information acquisition area of the display screen, the denser the acquisition light beam for the biological information is, so as to effectively compensate the problem that the fingerprint information carrying amount of the peripheral area 102 edge light beam is small, so that the fingerprint information acquired by the photosensitive area of the photosensitive pixel array 20 has better continuity and integrity. It should be noted that, in an alternative implementation manner of the embodiment of the present application, the included angle α of the optical channel 11 cannot be arbitrarily enlarged, and it has been mentioned in the foregoing description that, when the included angle α of the optical channel 11 is too large, the biological information carried in the light beam passing through the optical channel 11 is subjected to a large loss during transmission, and the optical path length traveled during the light beam transmission is also long, and the amount of information that can be extracted and used for subsequent calculation and identification when received on the photosensitive pixel unit 201 is very small, so that, for example, the included angle α of the optical channel 11 in the peripheral region 102 may be limited to be less than or equal to 60 °. That is, no matter how the plurality of light channels 11 of the entire optical path guiding layer 10 are divided and arranged, the maximum value of the included angle α of the light channels 11 should not exceed 60 ° to ensure an effective receiving rate of the biological information received on the light-sensitive pixel unit 201 after the biological information collecting area is enlarged.

In one implementation of the embodiment of the present application, the maximum value of the included angle α that limits the light channels 11 of the peripheral region 102 should not exceed 10 ° -45 °, for example, the maximum value of the included angle α of the light channels 11 of the peripheral region 102 is 10 °, 25 °, 30 °, 45 °, and so on. The maximum value of the included angle α is limited in this range, so that the effective receiving rate of the biological information received on the photosensitive pixel unit 201 after the biological information acquisition area is enlarged and the biological information identification effect of the biological information identification module in the embodiment of the present application can be better ensured.

Fig. 7 is a schematic structural diagram of another view angle of a biological information identification module according to an embodiment of the present disclosure, in another alternative implementation manner of the embodiment of the present disclosure, angles of the plurality of light channels 11 in the central area 101 are the same, and/or an outer area 102 surrounding the central area 101 includes a plurality of light channels 11 in the same outer area 102.

First, as can be seen from fig. 7, a large number of optical channels 11 are arranged in an array on the optical path guiding layer 10 for respectively transmitting the light beams carrying biological information at each position, the optical path guiding layer 10 includes a central region 101 and three peripheral regions 102 which are nested with each other and surround the central region 101, that is, each peripheral region 102 is a ring, and a plurality of peripheral regions 102 are nested with each other and surround one by one. In the central region 101, a plurality of light channels 11 are included, and all the light channels 11 within the central region 101 have the same angle α, for example, all the light channels 11 within the central region 101 have the same angle α of 1 °, or all the light channels 11 within the central region 101 have the same angle α of 0 °.

When the peripheral region 102 surrounding the central region 101 includes a plurality of peripheral regions 102, the angles of the included angles α of the light channels 11 in different peripheral regions 102 may be set to be different, but the angles of the included angles α of the plurality of light channels 11 for the same peripheral region 102 are the same, which is equivalent to that when the plurality of peripheral regions 102 are included, each peripheral region 102 acts as a gradient of change, and the light channels 11 in each gradient of change maintain the same angle of the included angle α. Three circles of peripheral regions 102 are formed outside the central region 101, and each circle of peripheral regions 102 includes a plurality of light channels 11 therein, which is only schematically shown in fig. 7, in fact, each annular peripheral region 102 has a plurality of circles of regularly arranged light channels 11, for example, for the first circle of peripheral regions 102 closest to the central region 101, all the light channels 11 in the peripheral region 102 have an included angle α of 2 °, for the second circle of peripheral regions 102, all the light channels 11 in the peripheral region 102 have an included angle α of 3 °, and so on.

Thus, on one hand, the angle of the included angle alpha of the optical channel 11 of the whole biological information identification module has a gradient change relationship, and on the other hand, the light path angle can be set by dividing the light path 11 into regions for the central region 101 and the peripheral region 102, dividing the light path into regions and setting the angle, can be quantitatively designed and produced, is convenient for production and processing, simplifies the difficulty and the requirement of the preparation process, is also convenient for the calculation difficulty of the later data processing, furthermore, as can be seen from fig. 7, the size of the photosensitive region of the photosensitive pixel array 20 (i.e., the photosensitive receiving surface of the photosensitive pixel array 20, which can be understood as the range of the view of the photosensitive pixel array 20 in fig. 7) can be set smaller than the size of the optical path guiding layer 10, by the arrangement of the angle α of the light path 11 of each region on the optical path guiding layer 10, a light beam larger than the photosensitive region of the photosensitive pixel array 20 is received. In an alternative implementation of the embodiments of the present application, the center of the central region 101 coincides with the center of the peripheral region 102; and/or, in an alternative implementation of the embodiments of the present application, the peripheral region 102 has a circular ring shape, a square ring shape, a triangular ring shape, or a special-shaped ring shape.

As shown in fig. 7, the center of the central region 101 may be coincident with the center of the peripheral region 102, and when the peripheral region 102 is circular, it is equivalent to the central region 101 being concentric with the peripheral region 102, so that it is convenient to perform quantitative design and production, to facilitate production and processing, to simplify the difficulty and requirements of the preparation process, and to facilitate the calculation difficulty of the post-data processing.

In an alternative implementation manner of the embodiment of the present application, the peripheral region 102 is a circular ring shape with the center of the central region 101 as a center, or, as shown in fig. 7, the peripheral region 102 is a square ring shape with the center of the central region 101 as a center. For another example, the shape may be a square ring, a triangular ring, or a deformed ring.

The outer edge shape of the central region 101 and the annular shape of the peripheral region 102 may be designed and arranged according to actual needs, and are not limited to the above examples, and this is not particularly limited in the embodiments of the present application.

If the peripheral region 102 surrounding the central region 101 is considered as a whole, the peripheral region 102 may include at least two sub-regions, a first sub-region and a second sub-region located at the periphery of the first sub-region, and the included angle α of the light channel 11 of the first sub-region is set to be larger than the included angle α of the light channel 11 of the second sub-region. Furthermore, it is also possible to set the included angle α of the plurality of light channels 11 of the first sub-area to be one same angle, and the included angle α of the plurality of light channels 11 of the second sub-area to be another same angle.

In an alternative embodiment of the present application, the angle α of the light channel 11 is related to the distance between the light channel 11 and the center of the light path guiding layer 10. The larger the distance, i.e., the closer to the edge of the optical path guiding layer 10, the larger the angle α of the light passage 11. If the distance is divided into equal segments, the center of the light path guiding layer 10 points to the edge, the included angle of the light path 11 corresponds to the segment of a distance, and the included angles α of the light paths 11 within the same distance segment are all the same. For example, taking the peripheral region 102 shown in fig. 7 as a square ring shape with the center of the central region 101 as the center, the width of each layer of the peripheral region 102 may be 1pixel, where 1pixel corresponds to one photosensitive pixel cell 201, i.e., the light channel 11 in each layer of the peripheral region 102 corresponds to one ring of photosensitive pixel cells 201 on the photosensitive pixel array 20.

In an alternative embodiment of the present application, on a longitudinal section through the central region 101, the plurality of light channels 11 are arranged in a fan-shaped arrangement with the central region 101 as the center.

Taking fig. 6 as an example, which is a longitudinal sectional view of an over-center area 101 of the biometric information recognition module according to the embodiment of the present application, in the sectional direction, the plurality of optical channels 11 are arranged in a fan shape as a whole with the center area 101 as a center and are inclined in the direction and angle.

In this way, the light beam carrying the biological information reflected by the upper display screen can be received in a larger range and guided to the photosensitive pixel array 20 for receiving, so that the photosensitive pixel array 20 receives as much biological information as possible, thereby facilitating the subsequent calculation processing and improving the accuracy of biological information identification. As long as the arrangement manner of the fan-shaped image capturing area can be presented, the image capturing area corresponding to the photosensitive pixel array 20 is necessarily presented in a fan-shaped divergent expansion state, so as to avoid the situation that the inclination directions of the light channels 11 on the two opposite sides of the central area 101 are the same, thereby forming an overall shift, which is just the situation that the image capturing area is shifted in position relative to the photosensitive area, and the expansion of the image capturing area is not substantially formed.

Fig. 8 is a sixth schematic structural view of a biological information recognition module according to an embodiment of the present disclosure, in an alternative implementation manner of the embodiment of the present disclosure, for at least a portion of the light channel 11, the channel aperture d1 on the side away from the photosensitive pixel array 20 is greater than or equal to the channel aperture d2 on the side close to the photosensitive pixel array 20.

For example, taking the light tunnel 11 as the collimating hole 121 in the basic structure layer 12 for illustration, as shown in fig. 8, the collimating hole 121 is in an inverted trapezoid structure as a whole, and the tunnel aperture d1 of the light tunnel 11 on the side away from the photosensitive pixel array 20 is larger than the tunnel aperture d2 on the side close to the photosensitive pixel array 20, so that when the light beam carrying the biological information is reflected by the display screen and enters the collimating hole 121 from above, since the aperture value of d1 is larger, as much light beam as possible enters the light tunnel 11, and after being guided and transmitted by the light tunnel 11, the exit d2 of the light tunnel 11 has a smaller aperture value, so that the light beam output by the collimating hole 121 can accurately and directly enter the corresponding photosensitive pixel unit 201.

On this basis, in an alternative implementation manner of the embodiment of the present application, the channel aperture of the light channel 11 may be further configured to gradually increase along the direction in which the light beam enters the photosensitive pixel unit 201. I.e. the variation of the channel aperture increases in a uniform manner along the direction of the light beam incident on the light-sensitive pixel unit 201, such a manner that the channel aperture gradually increases has a better light guiding capability and reduces the light loss during light guiding compared to the stepwise increase.

In an alternative embodiment of the present application, the central axis of the light tunnel 11 is a second straight line, and in a longitudinal section of the second straight line, two boundaries of at least a part of the light tunnel 11 have different included angles from the first straight line.

The central axis of the light channel 11 is defined as a second straight line, and on a longitudinal section of the second straight line, for at least a part of the light channel 11, two boundaries of the light channel 11 (i.e. two opposite sides of the light channel 11, which may be respectively defined as a first boundary included angle and a second boundary included angle) are different from an included angle of the first straight line, that is, the longitudinal section of the light channel 11 may be an asymmetric structure, for example, the longitudinal section is a right trapezoid.

On this basis, for at least part of the light channels 11, the first boundary angle of the light channel 11 is smaller than the second boundary angle, the first boundary angle is the angle between the boundary of the light channel 11 close to the central region 101 and the first straight line, and the second boundary angle is the angle between the boundary of the light channel 11 far from the central region 101 and the first straight line. That is, when the first boundary angle is different from the second boundary angle, the direction of the inclination is desirably, as shown in fig. 8, toward the center, that is, the first boundary angle close to the central region 101 is smaller, and the second boundary angle far from the central region 101 is larger, so that the edge light beam for enlarging the image capturing region is collected and incident in the direction inclined when it is satisfied.

Fig. 9 is a seventh schematic structural diagram of a biological information recognition module according to an embodiment of the present disclosure, and in an alternative implementation manner of the embodiment of the present disclosure, as shown in fig. 7, the biological information recognition module according to the embodiment of the present disclosure further includes an optical sensor a20, and the photosensitive pixel array 20 is integrated in the photosensitive recognition area a of the optical sensor a 20.

The optical sensor a20 is a semiconductor package chip, such as a CCD (charge coupled device), a CMOS (complementary metal oxide semiconductor device), a MEMS (micro-electro mechanical system) or the like, which has a light sensing capability of optical signals, can perform photoelectric conversion on the sensed optical signals, and also convert characteristic information carried in the optical signals into optical signals for recording and recognition. Optical sensor A20 is used as a package chip in the biological information identification module of this application embodiment, can integrate sensitization pixel array 20 in optical sensor A20's sensitization discernment district A, and packaging structure's compact structure, and have advantages such as job stabilization nature is strong, sensing ability is good, when guaranteeing the discernment ability, all has better auxiliary action in the aspect of the adaptability of the miniaturized and environment of module structure.

In an optional implementation manner of the embodiment of the present application, the optical sensor a20 includes a metal structure layer a1, the optical path guiding layer 10 further includes a metal light shielding layer 110, and the metal light shielding layer 110 multiplexes the metal structure layer a1 on the optical sensor a 20; at least one metal light shielding layer 110 is correspondingly provided with a light-transmitting portion 111 to form the light channel 11.

Fig. 10 is a schematic structural diagram of an optical sensor in a biological information identification module according to an embodiment of the present application, as shown in fig. 10, in a hierarchical structure of an optical sensor a20, a metal structure layer a1 is included, the metal structure layer a1 is used for preparing a corresponding metal pattern in the optical sensor a20 to implement a function required by the optical sensor a20, in the biological information identification module, the optical path guiding layer 10 includes a metal light shielding layer 110 formed on the metal layer, and since the metal light shielding layer 110 is made of a metal material, the metal light shielding layer 110 can be reused as the metal structure layer a1 on the optical sensor a20, that is, on the metal structure layer a1, a metal pattern required by the metal light shielding layer 110 is further formed on the basis of an existing metal pattern or without affecting an original function implementation, for example, the light-transmitting portion 111 is further formed on the metal structure layer a1 to be used as the metal light shielding layer 110.

Fig. 10 shows a specific implementation of multiplexing two metal structure layers a1 as two metal light shielding layers 110 in the optical path guiding layer 10, and in an optional implementation of the embodiment of the present application, the multiplexed metal structure layer a1 may further include 2 to 5 layers. In this way, most or all of the metal light shielding layers 110 can be provided to multiplex the metal structure layer a1 on the optical sensor a20, thereby further effectively reducing the structure volume.

On the other hand, an electronic device is further provided, and fig. 11 is a schematic structural diagram of the electronic device provided in the embodiment of the present application, and includes a display screen 30 and the biological information identification module set below the display screen 30.

The user places the carrier laminating that possesses individual biological characteristics such as finger, palm in the adoption picture region of display screen 30, takes screen fingerprint identification as an example, shines on the finger line and the line characteristic of finger position that shines can be carried as fingerprint information with the light beam of reflection, and the light beam that carries fingerprint information incides photosensitive pixel array 20 after the guide transmission of light path guide layer 10 in the biological information identification module. Through the guide effect of light path guide layer 10, can make the light beam incident photosensitive pixel array 20 of carrying biological information in the bigger area within range, make the electronic equipment of this application embodiment can receive more light signal that comes from the fingerprint reflection, thereby obtain more fingerprint information, under the condition of the area of adopting the picture that needn't increase display screen 30, the effectual pixel collection scope that increases photosensitive pixel array 20, biological information discernment's identification precision has been improved, simultaneously can reduce electronic equipment's manufacturing cost, the structure size of module is utilized to the efficient, save more inner spaces for electronic equipment.

In an optional implementation manner of the embodiment of the present application, a biological information identification area 301 for acquiring a light beam carrying biological information is preset on the display screen 30, and an area of the biological information identification area 301 is larger than a light beam receiving area of the light sensing pixel array 20 in the biological information identification module.

Taking the direction of one width as an example, W is the area of the biological information identification region 301, and W satisfies:

W＝(L+D*tanα)²； (1)

where L is the side length of the photosensitive pixel array 20, D is the distance between the upper surface of the display screen 30 and the photosensitive pixel array 20, and α is the included angle between the light channel 11 and the first line perpendicular to the surface of the photosensitive pixel unit 201.

As can be seen from equation (1) and by referring to fig. 11, in the width direction, the light beam carrying biological information in a wider width range can be made to enter the photosensitive pixel array 20 by the guiding action of the optical path guiding layer 10, and similarly, in other width directions, the light beam carrying biological information in a wider width range can be made to enter the photosensitive pixel array 20 by the guiding action of the optical path guiding layer 10, and therefore, the area W of the biological information identification area 301 is larger than the light beam receiving area of the photosensitive pixel array 20 in the biological information identification module. That is, when the existing area of the biological information recognition area 301 is not changed, the biological information recognition module according to the embodiment of the present application can reduce the area of the photosensitive recognition area a on the optical sensor a20 while ensuring the acquisition and recognition of the biological information, thereby reducing the cost, contributing to the miniaturization of the electronic device, and leaving a space for the design and planning of the internal structure of the electronic device.

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 utility model provides a biological information identification module, its characterized in that, including light path guiding layer and the photosensitive pixel array that sets gradually, light path guiding layer is including a plurality of light channels, photosensitive pixel array includes a plurality of photosensitive pixel units, and the light beam that carries biological information passes through respectively the incidence corresponds behind the light channel photosensitive pixel unit, wherein, light path guiding layer includes central zone and centers on central zone's peripheral region, peripheral zone's light channel and perpendicular to have the contained angle between the first straight line on photosensitive pixel array surface.

2. The module according to claim 1, wherein the light path guiding layer has a center pointing to an edge, and the plurality of light paths in the peripheral region have an increasing angle.

3. The biological information recognition module of claim 2, wherein the included angles of the plurality of optical channels of the peripheral region gradually increase with a fixed increase in a direction along which the center of the optical path guiding layer points to the edge.

4. The biological information recognition module of claim 3, wherein the fixed increment is 0.05 ° to 2 °.

5. The biological information recognition module of claim 2, wherein the included angles of the plurality of optical channels of the peripheral region gradually increase with varying increments along the direction in which the center of the optical path guiding layer points to the edge.

6. The biological information recognition module of claim 5, wherein the increase of the variation gradually decreases in a direction in which the center of the optical path guiding layer points to the edge.

7. The biological information recognition module of any one of claims 1 to 6, wherein the plurality of light channels in the central region have the same angle with the first straight line, and/or the plurality of light channels in the peripheral region surrounding the central region have the same angle with the first straight line.

8. The biological information recognition module of claim 7, wherein the light channel within the width of one of the peripheral regions corresponds to 1-10 of the photosensitive pixel units in the photosensitive pixel array.

9. The biological information recognition module of any one of claims 1 to 8, wherein a center of the central region coincides with a center of the peripheral region; and/or the peripheral area is in a circular ring shape, a square ring shape, a triangular ring shape or a special-shaped ring shape.

10. The biological information recognition module of any one of claims 1 to 9, wherein the plurality of light channels are arranged in a fan-shaped arrangement with the central region as a center on a longitudinal section passing through the central region.

11. The biological information recognition module of any one of claims 1 to 10, wherein for at least a portion of the light channel, a channel aperture on a side away from the photosensitive pixel array is equal to or greater than a channel aperture on a side close to the photosensitive pixel array.

12. The module of claim 11, wherein the channel aperture of the light channel gradually increases along the direction of the light beam incident on the photosensitive pixel unit.

13. The module according to claim 11, wherein the central axis of the light tunnel is a second straight line, and the two boundaries of at least some of the light tunnels have different angles with respect to the first straight line in the longitudinal section passing through the second straight line.

14. The module according to claim 13, wherein for at least some of the optical channels, a first boundary angle of the optical channel is smaller than a second boundary angle, the first boundary angle is an angle between a boundary of the optical channel close to the central region and the first straight line, and the second boundary angle is an angle between a boundary of the optical channel far from the central region and the first straight line.

15. The module according to any one of claims 1 to 14, wherein the light channel of the central region is at an angle with the first line, or the light channel of the central region is parallel to the first line.

16. The biological information recognition module of claims 1-6, wherein the light path guiding layer has a plurality of collimating holes formed therethrough, and the collimating holes are used as light channels.

17. The biological information recognition module of claims 1-6, wherein the optical path guiding layer comprises a microlens array and at least one diaphragm layer disposed below the microlens array, the diaphragm layer is distributed with a plurality of diaphragm holes that are transparent to light beams, the microlens array comprises a plurality of microlens units, and the microlens units and the diaphragm holes corresponding to the microlens units are used as the optical channels.

18. The biological information recognition module of claims 1-6, wherein the optical path guiding layer comprises a plurality of layers of diaphragms spaced along the optical transmission direction, a plurality of diaphragm holes permeable to light beams are distributed on the diaphragms, and the diaphragm holes corresponding to the positions of the plurality of layers of diaphragms form at least a part of the optical channel.

19. The module according to claim 17 or 18, wherein the distance between two adjacent diaphragm layers is greater than or equal to 5 μm.

20. The module according to any one of claims 1 to 15, wherein the light path in the peripheral region has an angle of 60 ° or less.

21. The module of claim 20, wherein the light channel of the peripheral region has an angle of 10 ° -45 ° or less.

22. The biological information recognition module of any one of claims 1 to 21, further comprising an optical sensor, wherein the photosensitive pixel array is integrated with a photosensitive recognition area of the optical sensor.

23. The module of claim 22, wherein the optical sensor comprises a metal structure layer, the optical path guiding layer further comprises a metal light shielding layer, and the metal light shielding layer multiplexes the metal structure layer on the optical sensor; at least one layer of metal shading layer is correspondingly provided with a light-transmitting part to form a light channel.

24. The module of claim 23, wherein the multiplexed metal structure layer comprises 2-5 layers.

25. An electronic device, comprising a display screen, and the biological information identification module according to any one of claims 1 to 24 disposed below the display screen.

26. The electronic device of claim 25, wherein a biological information identification area for acquiring a light beam carrying biological information is preset on the display screen, and an area of the biological information identification area is larger than a light beam receiving area of a light sensing pixel array in the biological information identification module.