CN109766829B - Fingerprint identification device and fingerprint identification panel - Google Patents
Fingerprint identification device and fingerprint identification panel Download PDFInfo
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- CN109766829B CN109766829B CN201910019420.7A CN201910019420A CN109766829B CN 109766829 B CN109766829 B CN 109766829B CN 201910019420 A CN201910019420 A CN 201910019420A CN 109766829 B CN109766829 B CN 109766829B
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Abstract
The invention provides a fingerprint identification device and a fingerprint identification panel, relates to the fingerprint identification technology, and can solve the problem that the existing optical fingerprint module has higher requirements on the thickness of a screen body. The invention comprises the following steps: the fingerprint identification device comprises a pressure change layer, a sensing receiving layer and a fingerprint identification module; wherein the compression layer is made of a material which has elasticity and can conduct electricity; the sensing receiving layer is opposite to the pressure-variable layer, a pressure-variable gap is arranged between the sensing receiving layer and the pressure-variable layer, and the pressure-variable gap is used for accommodating the deformation of the pressure-variable layer towards the direction of the sensing receiving layer when the pressure-variable layer is pressed; the sensing receiving layer and the pressure change layer are electrically connected with the fingerprint identification module, and the fingerprint identification module is used for determining the electric field distribution between the sensing receiving layer and the pressure change layer according to the deformation of the pressure change layer when pressed.
Description
Technical Field
The present invention relates to fingerprint identification technologies, and in particular, to a fingerprint identification device and a fingerprint identification panel.
Background
At present, in order to protect information security of a user, a fingerprint identification function is more and more commonly used on an intelligent terminal such as a mobile phone, for example, the fingerprint identification function is used for unlocking the intelligent terminal and performing mobile payment, and great convenience is brought to the user while the information security of the user is protected.
Among the prior art, the back through at the intelligent terminal screen body also deviates from user's surface and sets up the optics fingerprint module, and the light that the organic light emitting unit in the screen body sent is through the different energy reflection back of the crest trough of finger fingerprint, is received by the optics fingerprint module at the screen body back to through the energy difference of crest trough, distinguish the crest trough and form the fingerprint image, finally realize screen body fingerprint identification function through the algorithm.
However, since the light intensity emitted by the organic light emitting unit in the screen body has a certain limitation, and the thickness through which light emitted by the organic light emitting unit can penetrate is generally small, the requirement on the thickness of the screen body is high, and the setting of optical fingerprint identification also affects the pixel distribution in the screen body, which is not beneficial to realizing the high resolution of the screen body.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides a fingerprint identification device and a fingerprint identification panel, which can overcome some problems in the prior art.
The first aspect of the present invention provides a fingerprint recognition apparatus, comprising: the fingerprint identification device comprises a pressure change layer, a sensing receiving layer and a fingerprint identification module; wherein the compression layer is made of a material which has elasticity and can conduct electricity; the sensing receiving layer is opposite to the pressure-variable layer, a pressure-variable gap is arranged between the sensing receiving layer and the pressure-variable layer, and the pressure-variable gap is used for accommodating the deformation of the pressure-variable layer towards the direction of the sensing receiving layer when the pressure-variable layer is pressed; the sensing receiving layer and the pressure change layer are electrically connected with the fingerprint identification module, and the fingerprint identification module is used for determining the electric field distribution between the sensing receiving layer and the pressure change layer according to the deformation of the pressure change layer when pressed.
In one of them possible implementation, the pressure change layer is made by graphite alkene aerogel to make the pressure change layer have good elasticity and sensitivity, can improve fingerprint identification's accuracy, and make fingerprint identification device have longer life.
In one possible implementation, the sensing reception layer has a first surface facing the pressure change layer; the orthographic projection of the pressure change layer on the first surface is positioned in the first surface, so that the accuracy of fingerprint identification is improved.
In one possible implementation manner, the initial pressure change gap between the pressure change layer and the sensing receiving layer is larger than the maximum distance between a fingerprint peak and a fingerprint valley in the fingerprint, so that the pressure change layer is prevented from contacting with the sensing receiving layer, and the accuracy of fingerprint identification is ensured.
In one possible implementation manner, the sensing receiving layer includes a base, a plurality of uniformly distributed acquisition units are disposed on the base, each acquisition unit is configured to acquire an electrical signal of a corresponding region, and the fingerprint identification module is configured to determine the electric field distribution between the sensing receiving layer and the pressure change layer according to the received electrical signals of the plurality of acquisition units, so as to ensure accuracy of fingerprint identification.
In one possible implementation manner, the fingerprint identification device further comprises a connecting portion made of an insulating material and arranged between the pressure-variable layer and the sensing receiving layer, and the pressure-variable gap is located in an area enclosed by the connecting portion, the pressure-variable layer and the sensing receiving layer. So, can realize the fixed of receiving the layer to the sensing, can guarantee again to press the variable gap of pressing between variable layer and the sensing receiving layer.
In one of them possible implementation, connecting portion set up and be close to the border position on pressure change layer, just connecting portion form closed annular to connecting portion interfere the deformation on pressure change layer, guarantee fingerprint identification's accuracy, in addition, can also guarantee the support reliability of connecting portion.
In one possible implementation, the connecting portion is bonded to the voltage transformation layer to simplify the assembly process and ensure connection reliability.
In one possible implementation, the connecting portion is bonded to the sensing reception layer to simplify an assembly process and ensure connection reliability.
In one possible implementation manner, the fingerprint identification module is further configured to match the electric field distribution with a pre-stored electric field distribution, and determine whether the currently identified fingerprint is an authorized fingerprint according to the matching result.
In one possible implementation manner, the fingerprint identification module is further configured to store the electric field distribution of the currently identified fingerprint.
In a second aspect, the present invention provides a fingerprint identification panel, comprising a screen body and a fingerprint identification device as described in any one of the preceding claims, wherein the fingerprint identification device is disposed on the screen body.
In one possible implementation manner, the screen body is provided with a fingerprint identification area, and the fingerprint identification device is bonded in the fingerprint identification area so as to simplify the assembly process and ensure the connection reliability.
According to the fingerprint identification device and the fingerprint identification panel, the pressure-variable layer made of elastic and conductive materials is arranged, the sensing receiving layer opposite to the pressure-variable layer is arranged at intervals, so that the pressure-variable gap for accommodating the deformation of the pressure-variable layer towards the direction of the sensing receiving layer when the pressure-variable layer is pressed is formed between the pressure-variable layer and the sensing receiving layer, the fingerprint identification module is electrically connected with the sensing receiving layer and the pressure-variable layer, the electric field distribution between the sensing receiving layer and the pressure-variable layer can be determined according to the deformation of the pressure-variable layer when the pressure-variable layer is pressed, and then the identification or the collection of the current fingerprint can be realized according to the determined electric field distribution. Therefore, the fingerprint identification device does not need to identify the fingerprint by using the energy difference of the light reflected by the peaks and the troughs of the fingerprint, has no requirement on the light transmittance of the screen body, is not influenced by the thickness of the screen body, can ensure the accuracy of fingerprint identification, does not influence the pixel distribution in the screen body, and is favorable for improving the resolution of the screen body.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a first schematic structural diagram of a fingerprint identification panel according to this embodiment;
FIG. 2 is a schematic diagram of deformation of a piezoelectric layer during a fingerprint pressing process;
fig. 3 is a schematic structural diagram of a sensing receiving layer of a fingerprint identification panel according to this embodiment;
fig. 4 is a schematic structural diagram of a fingerprint identification panel according to the present embodiment.
Description of reference numerals:
100-fingerprint identification panel;
110-screen body; 110 a-fingerprint identification area;
120-fingerprint recognition means; 121-a compression layer; 122-a sensing reception layer; 122 a-a substrate; 122 b-an acquisition unit; 123-a connecting part;
201-fingerprint Peak; 202-fingerprint valley.
With the above figures, certain embodiments of the invention have been illustrated and described in more detail below. The drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it by those skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The terms "upper" and "lower" are used for describing relative positions of the structures in the drawings, and are only for the sake of clarity, but not for limiting the scope of the present invention, and the relative relationship changes or adjustments are also considered to be within the scope of the present invention without substantial technical changes.
Fig. 1 is a first schematic structural diagram of a fingerprint identification panel according to this embodiment; FIG. 2 is a schematic diagram of a fingerprint recognition device during a fingerprint pressing process; fig. 3 is a schematic structural diagram of a sensing receiving layer of a fingerprint identification panel according to this embodiment; fig. 4 is a schematic structural diagram of a fingerprint identification panel according to the present embodiment. Wherein, in FIG. 1, L1Representing an initial buckling gap; in FIG. 2, L2Representing the maximum distance between the fingerprint peak and the fingerprint valley.
Referring to fig. 1 to 4, the present embodiment provides a fingerprint identification panel 100, which includes a screen body 110 and a fingerprint identification device 120 disposed on the screen body 110. Among them, the fingerprint recognition device 120 may include: a pressure changing layer 121, a sensing receiving layer 122 and a fingerprint identification module. The compression layer 121 is made of a material having elasticity and capable of conducting electricity; the sensing receiving layer 122 is arranged opposite to the buckling layer 121, and a buckling gap is formed between the sensing receiving layer 122 and the buckling layer 121 and is used for accommodating the deformation of the buckling layer 121 towards the sensing receiving layer 122 when being pressed; the sensing receiving layer 122 and the pressure changing layer 121 are electrically connected with a fingerprint identification module, and the fingerprint identification module is used for determining the electric field distribution between the sensing receiving layer 122 and the pressure changing layer 121 according to the deformation of the pressure changing layer 121 when being pressed.
Illustratively, the screen body may be an OLED (Organic Light-Emitting diode) screen body. For example: the screen body 110 may include a substrate and an encapsulation layer, the substrate and the encapsulation layer may form an enclosed space, an organic light emitting unit is disposed in the enclosed space, the organic light emitting unit includes an anode, an organic light emitting layer, a cathode, and other film layers, the anode and the cathode are led out by a lead at a non-light emitting region, and are bonded to an Integrated Circuit (IC) or a Flexible Printed Circuit (FPC). In some examples, a touch layer may be further disposed on the encapsulation layer, and the touch layer may be used for performing input by a finger, a stylus pen, or the like, so as to implement human-computer interaction.
The surface of the screen body 110 facing away from the user may be provided with a fingerprint recognition device 120. The pressure-variable layer 121 of the fingerprint identification device 120 may be made of a material having elasticity and being capable of conducting electricity, so that when a fingerprint presses the screen body 110, a pressure applied by a user may be transmitted to the pressure-variable layer 121 through the screen body 110, and the pressure-variable layer 121 is deformed accordingly. Among different fingerprint lines (simply referred to as fingerprints), the distribution of fingerprint peaks 201 and fingerprint valleys 202 is different; that is, the distribution area of the fingerprint ridges 201 and the distribution area of the fingerprint valleys 202 are different among different fingerprints. When the piezoelectric layer 121 is compressed, different fingerprints will also cause the piezoelectric layer 121 to deform differently.
In some examples, the buckling layer 121 may be made of graphene aerogel, that is, the material having elasticity (high rebound elasticity) and capable of conducting electricity may include graphene aerogel, so that the buckling layer 121 has good rebound elasticity, light transmittance and light weight.
Certainly, the material used for the pressure-variable layer 121 is not limited to this, and the elastic and conductive material may also include a polymer material and a conductive material having elasticity, so that not only can the good elasticity of the polymer material be maintained, but also when the pressure-variable layer 121 made of a high-resilience material is deformed under pressure, the electrical signal between the pressure-variable layer 121 and the sensing-receiving layer 122 can be correspondingly changed, that is, the electric field distribution between the sensing-receiving layer 122 and the pressure-variable layer 121 can also be changed.
In some examples, the dilatant layer 121 may be a plate-shaped structure, and the plate-shaped dilatant layer 121 may be fixed to the screen body 110 by bonding with an optical cement; of course, the compressive layer 121 may be formed on the screen body 110 by other processes.
In some examples, dilatant layer 121 may be disposed on at least a portion of a surface of screen body 110; that is, the pressure-change layer 121 may cover at least a portion of the surface of the screen body 110; that is, at least a portion of the surface of the screen body 110 forms a fingerprint recognition area 110a, and the buckling layer 121 is disposed in the fingerprint recognition area 110 a. In this embodiment, the setting position of the fingerprint identification area 110a is not specifically limited, and may be specifically set according to actual needs; for example: the fingerprint recognition area 110a may be disposed in the middle or the lower portion of the screen body 110. In this embodiment, the size of the area of the fingerprint identification area 110a is not specifically limited, and may be specifically set according to actual needs; for example: the area of the fingerprint identification region 110a may be half of the surface area of the screen body 110.
In this embodiment, the shape of the buckling layer 121 may be adapted to the shape of the fingerprint identification area 110 a. In some examples, when the fingerprint identification area 110a is circular, the compression layer 121 may also be a circular plate; the compression layer 121 may also be disposed concentrically with the fingerprint identification region 110 a. In other examples, when the fingerprint identification area 110a is rectangular, the buckling layer 121 may be a rectangular plate body; the center of the pressure changing layer 121 may also coincide with the center of the fingerprint identification area 110a to ensure the accuracy of fingerprint identification. The surface of the pressure variable layer 121 facing the screen body 110 may have an area greater than or equal to the area of the fingerprint identification region 110 a.
The side of the pressure changing layer 121 away from the screen body 110 is provided with a sensing receiving layer 122. Wherein, it can be connected with fingerprint identification module to press change layer 121 and sensing receiving layer 122, and fingerprint identification module can be connected with the power.
The sensing receiving layer 122 is arranged opposite to the pressure variable layer 121, and the shape of the sensing receiving layer 122 can be matched with that of the pressure variable layer 121 so as to ensure the accuracy of fingerprint identification. In some examples, dilatant layer 121 is rectangular, sense receiving layer 122 is also rectangular, and the center of sense receiving layer 122 coincides with the center of dilatant layer 121. In other examples, dilatant layer 121 is circular, sense receiving layer 122 is also circular, and sense receiving layer 122 is disposed concentrically with dilatant layer 121.
The orthographic projection of the pressure variable layer 121 on the screen body 110 is positioned in the orthographic projection of the sensing receiving layer 122 on the screen body 110, so that the accuracy of fingerprint identification is improved. That is, when the surface of the sensing-receiving layer 122 facing the piezoelectric layer 121 is a first surface, the orthographic projection of the piezoelectric layer 121 on the first surface is located within the first surface.
In some examples, the area of the surface of the sense-receiving layer 122 facing the crush-layer 121 is equal to the area of the surface of the crush-layer 121 facing the sense-receiving layer 122, i.e., the sense-receiving layer 122 may have the same size as the crush-layer 121. In other examples, the area of the surface of the sensing-receiving layer 122 facing the crush layer 121 may be larger than the area of the surface of the crush layer 121 facing the sensing-receiving layer 122.
The pressure-variable layer 121 and the sensing receiving layer 122 are further arranged at intervals, so that a certain pressure-variable gap is formed between the sensing receiving layer 122 and the pressure-variable layer 121, and the pressure-variable gap is used for accommodating deformation of the pressure-variable layer 121 towards the sensing receiving layer 122 when being pressed. When the piezoelectric layer 121 is deformed by pressing, the piezoelectric gap between the sensor receiving layer 122 in a partial region of the piezoelectric layer 121 changes, so that an electrical signal between the partial region of the piezoelectric layer 121 and the sensor receiving layer 122 changes, that is, the electric field distribution between the sensor receiving layer 122 and the piezoelectric layer 121 changes.
The distribution areas of the fingerprint peaks 201 and the distribution areas of the fingerprint valleys 202 are different among different fingerprints. When the piezoelectric layer 121 is pressed, different fingerprints also cause different deformations of the piezoelectric layer 121, and thus different areas of changes of electrical signals between the piezoelectric layer 121 and the sensing layer 122, that is, different electric field distributions between the sensing layer 122 and the piezoelectric layer 121. Therefore, by detecting the deformation of the piezoelectric layer 121, the deformation is converted into a corresponding electrical signal, and the subsequent fingerprint identification module acquires or identifies the fingerprint by processing and analyzing the electrical signal.
Wherein the compression layer 12 is not compressed when the compression layer 121 is not compressed, that is, the compression layer 121 is not deformed1 and the sensing reception layer 122 may be arranged in parallel, and at this time, the dilatant gap between the dilatant layer 121 and the sensing reception layer 122 may be an initial dilatant gap L1。
In some examples, an initial buckling gap L between buckling layer 121 and sensing receptive layer 1221May be larger than the maximum distance L between the fingerprint peak 201 and the fingerprint valley 202 in the fingerprint2So that the sensing receiving layer 122 can accurately collect the change of the electrical signal between the sensing receiving layer 122 and the voltage change layer 121, thereby improving the accuracy of fingerprint identification. Wherein the sensing reception layer 122 may be formed of a force-sensitive sensor or a pressure sensor.
For example, the sensing reception layer 122 may include a base 122a, a plurality of uniformly distributed acquisition units 122b are disposed on the base 122a, the acquisition units 122b may be made of a conductive material, and adjacent acquisition units 122b are disposed in an insulating manner; each acquisition unit 122b is used for acquiring an electric signal of a corresponding area, and the fingerprint identification module determines the electric field distribution between the sensing receiving layer 122 and the voltage change layer 121 according to the received electric signals of the plurality of acquisition units 122 b.
For example: when there is the fingerprint to press screen body 110, under the effect of fingerprint peak 201, press and become layer 121 a plurality of regions all can take place corresponding deformation to press and become the clearance also can change to press and become between the region that the deformation takes place for press and become layer 121 and corresponding collection unit 122b, and then lead to press to become the electric signal between the region that deformation takes place for press and become layer 121 and corresponding collection unit 122b and change, also the electric field distribution that also is between sensing receiving layer 122 and press and become layer 121 will change.
For different fingerprints, under the action of the fingerprint peaks 201, deformation areas of the dilatant layer 121 are different, so that areas where the dilatant gap changes are different, that is, areas where electrical signals change are different, that is, electric field distribution between the sensing receiving layer 122 and the dilatant layer 121 is different. From this, fingerprint identification module can realize the collection or the discernment to the fingerprint according to the electric field distribution of the fingerprint of pressing the screen.
The following will not exemplify the functions and implementation processes of the fingerprint recognition module by taking the mobile phone provided with the fingerprint recognition panel 100 as an example.
In some examples, when the mobile phone needs to collect and store a fingerprint, after the fingerprint identification device 120 determines the electric field distribution of the current fingerprint (the fingerprint currently pressing the screen), the fingerprint identification module may be configured to store the electric field distribution of the current fingerprint. The stored fingerprint may be an authorized fingerprint of the mobile phone.
In some examples, when the mobile phone identifies a fingerprint, after the fingerprint identification device 120 determines the electric field distribution of the current fingerprint, the fingerprint identification module may be configured to match the electric field distribution with a pre-stored electric field distribution, and determine whether the currently identified fingerprint is an authorized fingerprint according to a matching result; if the currently identified fingerprint is determined to be an authorized fingerprint, allowing the mobile phone to be further operated; and if the currently identified fingerprint is not the authorized fingerprint, further operation on the mobile phone is forbidden or the mobile phone is warned.
Of course, the function of the fingerprint recognition module is not limited thereto, and the embodiment is only illustrated here.
Optionally, the fingerprint recognition device 120 further includes a connection part 123 made of an insulating material disposed between the pressure-changing layer 121 and the sensing reception layer 122 to connect the pressure-changing layer 121 with the sensing reception layer 122 through the connection part 123; the dilatant gap is located in the region surrounded by the connecting portion 123, the dilatant layer 121, and the sensor receiving layer 122.
In this embodiment, the pressure-changing layer 121 and the sensing receiving layer 122 are connected by the connecting portion 123, so that the pressure-changing layer 121, the sensing receiving layer 122 and the connecting portion 123 can be connected to form an assembly, and then the assembly is assembled with the screen body 110.
Of course, the sensing reception layer 122 may also be fixed by other components, for example, the sensing reception layer 122 may also be fixedly connected with the screen body 110 by other components; it is sufficient that the fixation of the sensing reception layer 122 can be achieved and an initial dilatant gap between the sensing reception layer 122 and the dilatant layer 121 is ensured.
In some examples, the connecting portion 123 is disposed near an edge of the piezoelectric layer 121, and the connecting portion 123 forms a closed ring shape, that is, the connecting portion 123 extends along a circumferential direction of an outer edge of the piezoelectric layer 121, that is, the piezoelectric layer 121, the connecting portion 123 and the sensing-receiving layer 122 enclose a closed space. Of course, the connecting portions 123 may also be a plurality of connecting plates or connecting columns that are spaced and uniformly distributed along the edge of the dilatant layer 121, as long as the purpose of connecting the sensing receiving layer 122 and the dilatant layer 121 can be achieved, and an initial dilatant gap between the sensing receiving layer 122 and the dilatant layer 121 is ensured.
In this embodiment, the connecting portion 123 is disposed at the edge of the pressure-variable layer 121, so that the connecting portion 123 does not interfere with the deformation of the pressure-variable layer 121, and the accuracy of fingerprint identification can be ensured.
Wherein the connection portion 123 may be bonded to the dilatant layer 121, or the connection portion 123 may be formed on the dilatant layer 121 through another process. The connection part 123 may be adhered to the sensing reception layer 122, or the connection part 123 may be formed on the sensing reception layer 122 through another process.
In addition, when the area of the dilatant layer 121 is relatively large, a plurality of support posts may be disposed between the dilatant layer 121 and the sensing reception layer 122 to ensure that the dilatant gap between the dilatant layer 121 and the sensing reception layer 122 is stable when the dilatant layer 121 is not stressed. The connection manner between the supporting column and the pressure-changing layer 121 and the sensing receiving layer 122 can be similar to that of the connection portion 123, and is not described herein again.
The fingerprint identification panel 100 provided by this embodiment, by providing the pressure-variable layer 121 made of a material having elasticity and capable of conducting electricity, by providing the sensing reception layer 122 opposite to the pressure-variable layer 121 and disposed at an interval, so that a pressure-variable gap for accommodating deformation of the pressure-variable layer 121 toward the sensing reception layer 122 when being pressed is provided between the pressure-variable layer 121 and the sensing reception layer 122, and by providing the fingerprint identification module electrically connected to the sensing reception layer 122 and the pressure-variable layer 121, the fingerprint identification module can determine the electric field distribution between the sensing reception layer 122 and the pressure-variable layer 121 according to the deformation of the pressure-variable layer 121 when being pressed, and further realize identification or collection of a current fingerprint according to the determined electric field distribution. Therefore, the fingerprint identification device does not need to identify the fingerprint by using the energy difference of the light reflected by the fingerprint wave crests and the fingerprint wave troughs, has no requirement on the light transmittance of the screen body 110, is not influenced by the thickness of the screen body 110, does not influence the pixel distribution in the screen body 110, and is favorable for improving the resolution of the screen body 110.
In addition, the present embodiment further provides a fingerprint identification device 120, and the structure, function and implementation process of the fingerprint identification device 120 are the same as those described above, and are not described herein again.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In addition, in the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A fingerprint recognition device, comprising: the fingerprint identification device comprises a pressure change layer, a sensing receiving layer and a fingerprint identification module; the pressure change layer is made of elastic and conductive materials, is arranged in a fingerprint identification area, and is matched with the fingerprint identification area in shape, and the pressure change layer is coincided with the center of the fingerprint identification area; the sensing receiving layer is arranged opposite to the pressure-changing layer, a pressure-changing gap is formed between the sensing receiving layer and the pressure-changing layer, a supporting column is arranged between the sensing receiving layer and the pressure-changing layer, the pressure-changing gap is used for accommodating the deformation of the pressure-changing layer towards the direction of the sensing receiving layer when the pressure-changing layer is pressed, the shape of the sensing receiving layer is matched with that of the pressure-changing layer, and the center of the sensing receiving layer is overlapped with that of the pressure-changing layer; the sensing receiving layer and the pressure change layer are electrically connected with the fingerprint identification module, and the fingerprint identification module is used for determining the electric field distribution between the sensing receiving layer and the pressure change layer according to the deformation of the pressure change layer when pressed.
2. The fingerprint recognition device of claim 1, wherein the compression layer is made of graphene aerogel.
3. The fingerprint recognition device of claim 1, wherein the sensing receptive layer has a first surface facing the compression layer; an orthographic projection of the compressive layer on the first surface is located within the first surface.
4. The fingerprint identification device of claim 1, wherein an initial pressure-change gap between the pressure-change layer and the sensing reception layer is greater than a maximum distance between a fingerprint peak and a fingerprint valley in the fingerprint.
5. The fingerprint identification device according to claim 1, wherein the sensing reception layer comprises a base body, a plurality of uniformly distributed acquisition units are arranged on the base body, each acquisition unit is used for acquiring an electric signal of a corresponding area, and the fingerprint identification module is used for determining the electric field distribution between the sensing reception layer and the pressure change layer according to the received electric signals of the plurality of acquisition units.
6. The fingerprint recognition device of claim 1, further comprising a connection portion made of an insulating material disposed between the piezoelectric layer and the sensing reception layer, wherein the piezoelectric gap is located in an area surrounded by the connection portion, the piezoelectric layer, and the sensing reception layer.
7. The fingerprint recognition device of claim 6, wherein the connecting portion is disposed proximate an edge of the compression layer, and the connecting portion forms a closed loop.
8. The fingerprint identification device of claim 6, wherein the connecting portion is bonded to the dilatant layer; and/or the connecting part is bonded with the sensing receiving layer.
9. The fingerprint recognition device according to any one of claims 1-8, wherein the fingerprint recognition module is further configured to match the electric field distribution with a pre-stored electric field distribution, and determine whether the currently recognized fingerprint is an authorized fingerprint according to the matching result; or, the fingerprint identification module is further configured to store the electric field distribution of the current fingerprint.
10. A fingerprint identification panel comprising a screen body and a fingerprint identification device according to any one of claims 1 to 9, said fingerprint identification device being disposed on said screen body;
preferably, the screen body is provided with a fingerprint identification area, and the fingerprint identification device is bonded in the fingerprint identification area.
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| CN105094494B (en) * | 2015-09-15 | 2019-08-23 | 京东方科技集团股份有限公司 | Fingerprint identification method, device and electronic equipment |
| KR102589636B1 (en) * | 2016-08-05 | 2023-10-17 | 삼성전자주식회사 | electronic device including fingerprint sensor |
| CN108108650B (en) * | 2016-11-25 | 2022-08-05 | 敦泰电子有限公司 | Fingerprint recognition module, device and manufacturing method thereof, and electrical equipment |
| CN108256389A (en) * | 2016-12-28 | 2018-07-06 | 南昌欧菲生物识别技术有限公司 | Fingerprint recognition button and electronic device |
| CN107077619B (en) * | 2017-02-16 | 2019-02-12 | 深圳市汇顶科技股份有限公司 | Fingerprint key structure, key pressure detection method and electronic device |
| CN108694364B (en) * | 2017-04-12 | 2021-10-19 | 清华大学 | A fingerprint collection device and preparation method thereof |
| CN107292226A (en) * | 2017-04-24 | 2017-10-24 | 麦克思商务咨询(深圳)有限公司 | Fingerprint identification device and electronic installation |
| CN108731855B (en) * | 2018-05-18 | 2019-07-26 | 京东方科技集团股份有限公司 | A pressure sensing unit, pressure sensor, and pressure sensing device |
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| US7768273B1 (en) * | 1997-09-11 | 2010-08-03 | Upek, Inc. | Electrostatic discharge protection of a capacitive type fingerprint sensing array |
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Application publication date: 20190517 Assignee: Yungu (Gu'an) Technology Co., Ltd.|Bazhou Yungu Electronic Technology Co., Ltd.|Kunshan Institute of technology new flat panel display technology center Co., Ltd Assignor: Kunshan Guo Xian Photoelectric Co., Ltd. Contract record no.: X2019990000156 Denomination of invention: fingerprint identification device and a fingerprint identification panel License type: Common License Record date: 20191030 |
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