CN214225937U

CN214225937U - Optical fingerprint detection device and electronic equipment

Info

Publication number: CN214225937U
Application number: CN202023344278.0U
Authority: CN
Inventors: 王仁峰; 郭益平; 黄新利; 刘凯; 龙卫
Original assignee: Shenzhen Goodix Technology Co Ltd
Current assignee: Shenzhen Goodix Technology Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-09-17
Anticipated expiration: 2030-12-31

Abstract

An optical fingerprint detection device and an electronic device are provided, which take the performance of the optical fingerprint detection device into consideration and reduce the occupied space of the optical fingerprint detection device in the electronic device. Optical fingerprint detection device is used for setting up the holding area in electronic equipment's side, includes: a cover plate; the optical assembly is connected with the fingerprint sensor and sequentially arranged in a first direction of the cover plate, and the first direction faces the inner side of the side face of the electronic equipment; the first substrate is arranged in the first direction of the fingerprint sensor and used for being fixed to the carrier plate at the containing area, so that the first substrate is arranged in the second direction of the carrier plate, and the second direction faces the outer side of the side face of the electronic equipment; the support piece is connected with the cover plate and the first substrate so as to support the cover plate to be arranged in the second direction of the optical assembly; the light source is used for emitting optical signal to the finger of apron department, and optical signal forms the fingerprint light signal who carries fingerprint information behind the finger, and optical assembly is used for leading fingerprint light signal to fingerprint sensor.

Description

Optical fingerprint detection device and electronic equipment

Technical Field

The present application relates to the field of biometric detection technology, and more particularly, to an optical fingerprint detection apparatus and an electronic device.

Background

With the development of biometric technology, fingerprint detection technology is widely applied to the fields of mobile terminal design, automotive electronics, smart home and the like. The consumer requires the product size frivolous as far as possible when increasing to various electronic terminal product's functional demand, and consequently electronic product inner structure is compacter day by day, and the fingerprint detection function device structural design degree of difficulty increases, and the demand that integrates is more urgent from this fingerprint detection device miniaturization and other functional device, requires that the fingerprint detection device realizes more accurate function under the condition that occupies the littleer volume space of electronic product.

At present, the fingerprint detection device of mainstream mainly is electric capacity fingerprint detection device and optics fingerprint detection device, and wherein, optics fingerprint detection device generally sets up in the inside or display screen below of electronic equipment's display screen, and integrated inside can cause certain influence to the demonstration function of display screen in the display screen, and set up and then can occupy electronic equipment's partly thickness space in the display screen below, is unfavorable for electronic equipment's frivolous development.

Therefore, how to reduce the occupied space in the electronic device while considering the performance of the optical fingerprint detection device is an urgent technical problem to be solved.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an optical fingerprint detection device and electronic equipment, can compromise under the prerequisite of optical fingerprint detection device's performance, reduce its occupation space in electronic equipment, be favorable to electronic equipment's miniaturization and frivolous development.

In a first aspect, an optical fingerprint detection device is provided for being disposed in an accommodating area on a side surface of an electronic device, the optical fingerprint detection device including: a cover plate; the optical assembly is connected to the fingerprint sensor and sequentially arranged in a first direction of the cover plate, and the first direction faces to the inner side of the side face of the electronic equipment; the first substrate is arranged in the first direction of the fingerprint sensor and used for supporting the fingerprint sensor and the optical assembly, and the first substrate is used for being fixed to the carrier plate at the containing area, so that the first substrate is arranged in a second direction of the carrier plate, and the second direction faces to the outer side of the side face of the electronic equipment; a support member connecting the cover plate and the first substrate to support the cover plate to be disposed in the second direction of the optical assembly and the fingerprint sensor; the optical assembly is used for guiding the fingerprint optical signal to the fingerprint sensor so as to perform fingerprint detection.

Through the technical scheme of this application embodiment, utilize optical assembly and fingerprint sensor to carry out optics fingerprint formation of image, optical assembly and fingerprint sensor interconnect, whole thickness is less. In addition, in the embodiment of the application, the optical fingerprint detection device is arranged in the accommodating area of the side face of the electronic equipment, and the side face thickness space of the electronic equipment is utilized, so that the optical fingerprint detection device is not required to be arranged below a display screen, the space under the screen is saved, and the light and thin development of the electronic equipment is facilitated.

In some possible embodiments, the cover is a cambered cover, and the cambered surface of the cambered cover is convex towards the outer side of the side surface of the electronic device.

In some possible embodiments, the cover plate includes a first surface and a second surface, the first surface is an arc surface protruding toward an outer side of the electronic device side surface, and the second surface is a plane surface, and the cover plate is configured to converge the fingerprint light signal to the optical component.

In the embodiment of the application, the second surface of the cover plate is designed to be a plane, so that the connection with the supporting piece is facilitated, and the supporting stability of the cover plate is improved. In addition, the first surface of the cover plate is designed into an arc surface, the first surface of the arc cover plate is used for being in contact with fingers of a user, the arc cover plate is compared with a plane cover plate, the contact experience of the fingers of the user can be improved through the arc surface cover plate, more importantly, the arc surface radian of the arc cover plate can be correspondingly designed according to the radian of the side surface of the electronic equipment, the arc cover plate is well matched with the side surface of the electronic equipment, and the attractiveness of the appearance of the electronic equipment is improved. In addition, the cover plate is of a convex lens structure and has the function of converging light, namely, the fingerprint optical signal carrying fingerprint information is formed after the fingerprint optical signal is reflected or transmitted by a finger and converged to the optical component, so that the light intensity of the fingerprint optical signal received by the optical component is improved, and the performance of the optical fingerprint detection device is further improved.

At this point, set up at present in the surperficial electric capacity fingerprint detection device of electronic equipment then generally be planar structure, and is more single in the outward appearance, does not have the third dimension, and customer experience is not good, and in addition, materials such as dust can adsorb on the plane very easily, leads to fingerprint identification to appear the erroneous judgement scheduling problem, and the cell-phone when dropping, can cause the damage to whole electric capacity fingerprint detection device's plane, influences fingerprint detection device's performance. Even if the arc cover plate is arranged above the capacitance fingerprint detection device, the detection principle of the capacitance fingerprint detection device is based on capacitance detection between a finger and an electrode, so that the arc cover plate can influence capacitance between the finger and the electrode, and fingerprint signals detected by the capacitance fingerprint detection device become small, so that the performance of fingerprint detection is influenced. In conclusion, the capacitance fingerprint detection device is not suitable for adding the cover plate structure on the surface, and the optical fingerprint detection device is superior to the capacitance fingerprint detection device in the aspects of attractiveness and adaptability of the electronic equipment.

In some possible embodiments, the support is a hollow cylindrical structure, the optical assembly and the fingerprint sensor being disposed in the hollow cylindrical structure; the peripheral edge of the cover plate is fixed to the hollow columnar structure through a glue layer, so that the cover plate is arranged in the second direction of the optical assembly and the fingerprint sensor.

In some possible embodiments, the light source is disposed in the hollow cylindrical structure, and the cover plate is disposed in the second direction of the light source; the optical fingerprint detection device further includes: the light blocking structure is arranged between the optical assembly and the light source and between the fingerprint sensor and the light source.

In some possible embodiments, the optical fingerprint detection device comprises one of the optical components and one of the fingerprint sensors; the length of the optical assembly along the long side direction of the side face of the electronic equipment is greater than the length of the optical assembly along the short side direction of the side face of the electronic equipment; and the length of the fingerprint sensor along the long side direction of the side face of the electronic equipment is greater than the length of the fingerprint sensor along the short side direction of the side face of the electronic equipment.

In some possible embodiments, the optical fingerprint detection device comprises a plurality of the optical assemblies and a plurality of the fingerprint sensors, and the plurality of the optical assemblies correspond to the plurality of the fingerprint sensors one by one; the optical components and the fingerprint sensors are arranged along the long edge of the side face of the electronic device.

In some possible embodiments, the light source is disposed in the second direction of the first substrate and connected to the first substrate.

In some possible embodiments, the optical fingerprint detection device further includes a second substrate, and the light source is disposed in the first direction of the second substrate and connected to the second substrate.

In some possible embodiments, the cover plate, the optical assembly, the fingerprint sensor and the support are disposed in a first accommodation region of a side of the electronic device, and the light source is disposed in a second accommodation region of the side of the electronic device, the first accommodation region and the second accommodation region being disposed adjacent to each other.

In some possible embodiments, the cover plate, the optical assembly, the fingerprint sensor, the support and the light source are disposed in a first accommodation area of a side of the electronic device.

In some possible embodiments, the optical assembly comprises: a microlens array; at least one diaphragm layer arranged below the micro lens array, wherein a plurality of light-passing small holes are formed in each diaphragm layer in the at least one diaphragm layer; the micro lens array is used for converging the fingerprint optical signal into a plurality of light through holes of the at least one diaphragm layer, and the fingerprint optical signal is transmitted to the fingerprint sensor through the plurality of light through holes to be subjected to fingerprint detection.

In some possible embodiments, each microlens in the microlens array corresponds to at least one light-passing aperture in each layer of the diaphragm layer, and at least one pixel element in the fingerprint sensor; the fingerprint sensor is used for receiving fingerprint light signals in at least one direction so as to acquire at least one fingerprint image for fingerprint detection.

In some possible embodiments, the optical fingerprint detection apparatus further includes: and the shading layer is provided with a first window, the first window is arranged in the second direction of the fingerprint sensor, and the first window is used for receiving the fingerprint sensor through the fingerprint optical signal.

In some possible embodiments, the optical component is located in the first window.

In some possible embodiments, a second window is further formed in the light shielding layer, and a top region of the first lead of the fingerprint sensor connected to the first substrate is located in the second window.

In some possible embodiments, the first lead is covered with a lead protection paste, in the second direction, a top region of the lead protection paste is located in the second window, and a height of the lead protection paste is less than 150 μm.

In some possible embodiments, the optical fingerprint detection apparatus further includes: a supporting layer disposed between the first substrate and the light-shielding layer for supporting the light-shielding layer;

the supporting layer is provided with a third opening window, the fingerprint sensor is arranged in the third opening window, and in the second direction, the highest point of the supporting layer is not higher than that of the optical assembly.

In some possible embodiments, the optical fingerprint detection apparatus further includes: the cotton layer of bubble sets up in this second direction of this light shield layer, is formed with the fourth windowing in this cotton layer of bubble, and this fourth windowing sets up in this second direction of this optical component and this fingerprint sensor, and this fourth windowing is used for passing through this fingerprint optical signal in order to be received by this optical component and this fingerprint sensor, and the area of this fourth windowing is not less than the area of this first windowing in this light shield layer.

In some possible embodiments, the foam layer is used to connect the cover plate and the light shielding layer to support the cover plate.

In some possible embodiments, the material of the cover plate is a transparent material, or the cover plate includes a filter material, and the filter material is used for passing the optical signal in the target wavelength band and filtering the optical signal in the non-target wavelength band.

In some possible embodiments, the optical fingerprint detection apparatus further includes: and the filter layer is arranged in a light path between the cover plate and the fingerprint sensor and is used for filtering the optical signals of the non-target wave bands through the optical signals of the target wave bands.

In some possible embodiments, the light source is configured to emit light signals in an infrared band, and the target band includes the infrared band.

In some possible embodiments, a key is disposed in the accommodating area, and the optical fingerprint detection device is disposed in the key.

In some possible embodiments, the key is used only for implementing the fingerprint detection function, or the key is used for implementing the fingerprint detection function and the target function of the electronic device.

In a second aspect, an electronic device is provided, comprising: an accommodating area arranged on the side surface of the electronic equipment; a carrier plate arranged at the accommodating area; and the optical fingerprint detection device in the first aspect or any one of the possible embodiments of the first aspect, wherein the optical fingerprint detection device is fixed to the carrier plate.

In some possible embodiments, the carrier is disposed in the accommodating area, or the carrier is disposed in a first direction of the accommodating area, wherein the first direction faces an inner side of a side surface of the electronic device.

In some possible embodiments, the carrier board is a mechanical or electrical structural component in the electronic device.

Drawings

Fig. 1 is a schematic view of an electronic device according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of an optical fingerprint detection device according to an embodiment of the present application.

Fig. 3 is another structural diagram of an optical fingerprint detection device according to an embodiment of the present application.

Fig. 4 is another structural diagram of an optical fingerprint detection device according to an embodiment of the present application.

Fig. 5 is another structural diagram of an optical fingerprint detection device according to an embodiment of the present application.

Fig. 6 is another structural diagram of an optical fingerprint detection device according to an embodiment of the present application.

FIG. 7 is a schematic diagram of several designs of positions of a light source according to an embodiment of the present application.

Fig. 8 is another structural diagram of an optical fingerprint detection device according to an embodiment of the present application.

Fig. 9 is another structural diagram of an optical fingerprint detection device according to an embodiment of the present application.

Fig. 10 is another structural diagram of an optical fingerprint detection device according to an embodiment of the present application.

Fig. 11 is another structural diagram of an optical fingerprint detection device according to an embodiment of the present application.

Detailed Description

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

It should be understood that the embodiments of the present application may be applied to optical biometric identification systems, including but not limited to optical fingerprint detection systems and products based on optical fingerprint imaging. The embodiments of the present application are described only by taking an optical fingerprint detection system as an example, but the embodiments of the present application should not be limited to this.

As a common application scenario, the optical fingerprint detection system provided by the embodiment of the application can be applied to smart phones, tablet computers, intelligent wearable devices and other types of mobile terminals or other electronic devices. More specifically, in the above electronic device, the optical fingerprint detection system may include an optical fingerprint detection device and a processing unit, wherein the optical fingerprint detection device is configured to optically image a fingerprint, and the processing unit is configured to perform fingerprint detection, fingerprint identification and other processing on a fingerprint image to obtain a relevant detection result and identification result, and provide the relevant detection result and identification result to the electronic device, so as to meet relevant requirements of users. In the embodiment of the present application, the optical fingerprint detection device may be disposed on any side of the electronic device that interacts with the user, including but not limited to the front, the back, or the side of the electronic device.

As an example, as shown in fig. 1, the electronic device where the optical fingerprint detection system provided in the embodiment of the present application is located is a mobile phone, where the optical fingerprint detection device may be disposed on a side surface of the mobile phone, and as an example, the optical fingerprint detection device may be embedded, protruded, or flatly disposed on the side surface of the mobile phone.

In some embodiments, the optical fingerprint detection device can be a separate component arranged on the side surface of the mobile phone and is only used for realizing the fingerprint detection function;

in other embodiments, the optical fingerprint detection device may be integrated with a target key disposed on a side of the mobile phone, for example, the target key includes but is not limited to a power key of the electronic device, and the power key may be used for implementing a fingerprint detection function in addition to the function of activating/waking up the mobile phone. Further, in the embodiment, the mobile phone can be restarted/awakened on the basis of successful fingerprint detection, so that the safety performance of mobile phone authentication is improved.

Fig. 2 shows a schematic structural diagram of the optical fingerprint detection apparatus 100 in the embodiment of the present application. The optical fingerprint detection device 100 may be disposed at the side of the mobile phone in fig. 1, alternatively, it may be disposed at the side of the mobile phone, or may be disposed at the keys at the side of the mobile phone shown in fig. 1. Specifically, the structural diagram shown in fig. 2 may be a cross-sectional structural diagram along a plane where the XZ axis is located in fig. 1. The positive direction of the Z axis is a direction toward the outer side of the side face of the electronic device, and the negative direction of the Z axis is a direction toward the inner side of the side face of the electronic device. The X-axis is the short side direction of the side of the electronic device, and the Y-axis is the long side direction of the side of the electronic device.

As shown in fig. 2, a receiving area 202 is formed on a side surface of a housing 201 of the electronic device, the receiving area 202 may be a through hole, a groove, or an area in a key, and the optical fingerprint detection apparatus 100 is disposed in the receiving area 202.

The optical fingerprint detection apparatus 100 includes: a cover plate 110, an optical assembly 120, a fingerprint sensor 130, a first substrate 140, a support 150, and a light source 160.

The optical assembly 120 is connected to the fingerprint sensor 130 and sequentially disposed in a first direction of the cover plate 110, where the first direction faces an inner side of a side of the electronic device;

the first substrate 140 is disposed in a first direction of the fingerprint sensor 130 and is used for supporting the fingerprint sensor 130 and the optical component 120, the first substrate 140 is used for being fixed to the carrier 211 at the accommodating area 202, so that the first substrate 140 is disposed in a second direction of the carrier 211, the second direction facing to the outside of the side of the electronic device;

the supporting member 150 connects the cover plate 110 and the first substrate 140, and is used for supporting the cover plate 110 to be disposed at the second direction of the optical assembly 120 and the fingerprint sensor 130.

The light source 160 is used for emitting a light signal to the finger at the cover plate 110, the light signal forms a fingerprint light signal carrying fingerprint information of the finger after being reflected or transmitted by the finger, and the optical component 120 is used for guiding the fingerprint light signal into the fingerprint sensor 130 for fingerprint detection and/or fingerprint identification.

Specifically, the carrier plate 211 is a structural member inside the electronic device, has a certain mechanical strength and a supporting function, and can be disposed inside the accommodating area 202, and the cross-sectional area of the carrier plate 211 is smaller than that of the accommodating area 202 on the same plane, or the carrier plate 211 can also be disposed on one side of the accommodating area 202 close to the inside of the electronic device, and the cross-sectional area of the carrier plate 211 is larger than that of the accommodating area 202 on the same plane.

The carrier 211 includes, but is not limited to, a mechanical structure in an electronic device, or may also be an electrical structure, and the embodiment of the present application does not limit the specific type and the specific structure of the carrier.

It can be understood that the optical signal formed after the reflection or transmission of the finger may also carry biometric information such as pulse, blood oxygen, vein, etc. in addition to the fingerprint optical signal carrying the fingerprint information. In other words, the optical fingerprint detection device of the embodiment of the present application can be used for detecting other biometric information such as pulse, blood oxygen, vein, etc. in addition to detecting fingerprints, so as to perform other functions such as living body detection, human health detection, etc.

It will also be understood that the above "first direction" is towards the inside of the side of the electronic device, i.e. the "first direction" may be the negative direction of the Z-axis shown in fig. 1 and 2, and in fig. 2 the "first direction" may also be written as "below". Correspondingly, the "second direction" in the above is toward the outside of the side of the electronic device, i.e., the "second direction" may be a positive direction of the Z axis shown in fig. 1 and 2, and in fig. 2, the "second direction" may also be written as "above". For convenience of description of the related embodiments in the present application with reference to the drawings, except for the description in a special case, "upper" in the following refers to a "second direction" toward the outside of the electronic apparatus, and "lower" refers to a "first direction" toward the inside of the electronic apparatus.

Based on the related description of fig. 1 and fig. 2, the embodiment of the present application provides an optical fingerprint detection apparatus, which performs optical fingerprint imaging by using an optical assembly and a fingerprint sensor, wherein the optical assembly and the fingerprint sensor are connected with each other, and the overall thickness is small. In addition, in the embodiment of the application, the optical fingerprint detection device is arranged in the accommodating area of the side face of the electronic equipment, and the side face thickness space of the electronic equipment is utilized, so that the optical fingerprint detection device is not required to be arranged below a display screen, the space under the screen is saved, and the light and thin development of the electronic equipment is facilitated.

Further, the optical fingerprint detection device may be integrated into a key disposed on a side surface of the electronic device, in which case, the carrier 211 may be a structural member of the key. Alternatively, the key may be a dedicated key for fingerprint detection, or may also be a multi-function key for fingerprint detection and performing other target functions of the electronic device. By adopting the embodiment, a user can conveniently and quickly find the keys on the surface of the electronic equipment to perform fingerprint detection, so that the user experience can be improved, and further, if the keys are keys for executing other target functions in the electronic equipment, the optical fingerprint detection device in the embodiment of the application reuses the space of the keys, so that the space utilization rate in the electronic equipment is further improved.

Fig. 3 shows another schematic structural diagram of the optical fingerprint detection device 100, which may be a schematic structural cross-sectional diagram along the plane of the XZ axis in fig. 1.

Optionally, in this embodiment, the cover plate 110 may be a cambered cover plate, and the cambered surface is convex toward the outer side of the side surface of the electronic device.

In some embodiments, the cover plate 110 includes a first surface and a second surface, wherein the first surface is a cambered surface, the first surface protrudes toward the outside of the side of the electronic device, and the second surface is a plane surface for facilitating the connection with the support member 150.

Specifically, this arc surface cover's first face is used for contacting with user's finger, compares in the plane apron, and this arc surface cover can improve the contact experience that the user pointed, and more importantly, the corresponding design can be carried out according to the radian of electronic equipment's side to the arc surface radian of this arc surface cover for this arc surface cover forms good cooperation with electronic equipment's side, promotes the pleasing to the eye degree of electronic equipment's outward appearance.

With continued reference to fig. 3, optionally, in the optical fingerprint detection apparatus 100, the optical assembly 120 may include: a microlens array 121 and a stop layer 122 disposed below the microlens array 121. The microlens array 121 includes a plurality of microlenses, each microlens is used for converging an optical signal above the microlens and transmitting the converged optical signal to a diaphragm layer below the microlens. The diaphragm layer 122 is made of a light absorbing material, and a plurality of light-passing small holes are formed in the diaphragm layer, and are used for selecting the direction of the light signal converged by the microlens, so that the light signal in the target direction enters the fingerprint sensor 130 through the light-passing small holes, and the stray light signal in the non-target direction is absorbed by the light absorbing material in the region where the non-passing small holes are located, thereby preventing the stray light signal from interfering with fingerprint imaging.

The fingerprint sensor 130 includes a Pixel Array (Pixel Array) formed of a plurality of Pixel (Pixel) units for converting light signals passing through the aperture layer 122 into corresponding image signals. Specifically, the fingerprint sensor 130 may be a fingerprint sensor chip manufactured by a semiconductor process, and the optical component 120 may be integrally packaged in the fingerprint sensor chip or may be independently disposed above the fingerprint sensor chip.

It should be noted that fig. 3 only shows the case where the optical assembly 120 includes one stop layer 122, and optionally, the optical assembly 120 may also include multiple stop layers 122. The fingerprint sensor 130 comprises a pixel array consisting of a plurality of pixel units, each microlens in the microlens array 121 corresponds to at least one light-passing aperture in each layer of the diaphragm layer 122, and at least one pixel unit in the pixel array, and each microlens transmits a converged light signal to the inside of the corresponding light-passing aperture and transmits the converged light signal to the corresponding pixel unit through the light-passing aperture to perform optical fingerprint imaging.

Alternatively, a plurality of pixel cells in the fingerprint sensor 130 may be used to receive fingerprint light signals in the same direction, for example, a plurality of pixel cells each receive fingerprint light signals perpendicular to the display screen, or a plurality of pixel cells each receive fingerprint light signals oblique to a particular direction of the display screen.

Optionally, the plurality of pixel units in the fingerprint sensor 130 may also be configured to receive fingerprint light signals of different directions to form fingerprint image signals of a plurality of fingerprint images, for example, a first portion of the plurality of pixel units receives a fingerprint light signal of one direction to form a fingerprint image signal of a first fingerprint image; the second part of pixel units receive the fingerprint light signals in the other direction to form fingerprint image signals of a second fingerprint image.

In some embodiments, the stop layer 122 may be formed on the fingerprint sensor 130 by semiconductor process growth or other processes, for example, a non-transparent material film is prepared on the fingerprint sensor 130 by atomic layer deposition, sputtering, electron beam evaporation, ion beam deposition, etc., and then the aperture pattern is etched and etched to form a plurality of light-passing apertures. It will be appreciated that where the optical assembly 120 includes multiple layers of the diaphragm layer 122, the lowermost diaphragm layer 122 may be isolated from the fingerprint sensor 130, as well as adjacent diaphragm layers 122, by transparent dielectric layers.

It is understood that the optical assembly 120 may be other light guiding structures besides the structure shown in fig. 3, such as a collimator (collimator) layer, having a plurality of collimating units or a micro-hole array, and the embodiment of the present invention does not limit the specific structure of the optical assembly 120.

In the embodiment of the present application, the optical component 120 with the above structure is not limited by the imaging optical path of the lens, and reduces the thickness of the optical component, compared with an optical fingerprint detection device based on optical lens imaging, which is beneficial to realizing the lightness and thinness of the optical fingerprint detection device. In addition, compared with an optical fingerprint detection device based on collimator layer imaging, the optical fingerprint detection device utilizes the micro-lens array to converge optical signals, and utilizes one or more layers of diaphragm layers to guide the direction of the optical signals, so that the quality of the fingerprint optical signals can be further improved, and the fingerprint detection performance of the optical fingerprint detection device can be improved.

Alternatively, in order to ensure the detection performance of the optical assembly 120 and the fingerprint sensor 130, the distance between the optical assembly 120 and the cover plate 110 in the Z direction should be less than 600 μm.

In addition, it can be understood that the cover plate 110 may be a convex lens structure, which has a function of converging light, that is, the light signals of the fingerprint carrying the fingerprint information, which are formed after being reflected or transmitted by the finger, are converged to the optical component 120, so as to increase the light intensity of the fingerprint light signals received by the optical component 120, thereby further improving the performance of the optical fingerprint detection apparatus 100.

Further, in the embodiment shown in fig. 3, the first substrate 140 may be a circuit board, and the fingerprint sensor 130 may be disposed on the first substrate 140 through a glue layer, including but not limited to a Die Attach Film (DAF) glue layer. The first substrate 140 is used for supporting the fingerprint sensor 130 and simultaneously electrically connecting with the fingerprint sensor 130, and transmitting the fingerprint electrical signal after the photoelectric conversion of the fingerprint sensor 130 to the processing unit, so as to perform subsequent processing actions such as fingerprint detection.

By way of example, the first substrate 140 includes, but is not limited to, a Printed Circuit Board (PCB), a Flexible Printed Circuit Board (FPC), a rigid-flex Circuit Board, or other types of Circuit boards, and this is not particularly limited in this embodiment. Optionally, the electrical connection between the fingerprint sensor 130 and the first substrate 140 includes, but is not limited to: wire Bonding (Wire Bonding), Tape Automated Bonding (TAB), Flip Chip (FC), or other types of electrical connection, which is not limited in this embodiment of the present application.

It is understood that, as shown in fig. 3, if the first substrate 140 is an FPC, a reinforcing plate 141 may be further disposed below the first substrate to reinforce the mechanical strength of the FPC and support the fingerprint sensor 130 above the first substrate. The stiffening plate 141 includes, but is not limited to, a stiffening steel plate, and may also be other types of stiffening plates in the related art, which is not specifically limited in the embodiments of the present application.

Optionally, the fingerprint sensor 130 may be directly disposed above the FPC, or a window may be formed in the FPC, and the fingerprint sensor 130 is disposed in the window and located above the stiffener, and the former embodiment is adopted, so that the manufacturing process is simple, the production efficiency can be improved, and the latter embodiment is adopted, so that the height of the optical fingerprint detection apparatus 100 can be reduced, and the space of the electronic device occupied by the same can be reduced.

In some embodiments, the first substrate 140 may be a circuit board of the fingerprint sensor 130, and is used for transmitting an electrical signal of the fingerprint sensor 130 and supporting the fingerprint sensor 130 and the supporting member 150 thereon, and further, a processing unit and other types of electrical components may be disposed on the first substrate 140 for performing a complete fingerprint detection function.

In other embodiments, the first substrate 140 may also be a circuit board of other functional modules in the electronic device, and on the basis, the circuit board is multiplexed as the circuit board of the fingerprint sensor 130.

In the embodiment of the present application, the reinforcing plate 141 is fixed above the carrier 211 of the electronic device, so that the optical fingerprint detection device 100 is fixedly disposed on a side surface of the electronic device.

Further, as shown in fig. 3, the cover plate 110 may be connected to the supporting member 150 through a glue layer 111, and the supporting member 150 is fixedly disposed on the first substrate 140 to fixedly dispose the cover plate 110 above the optical assembly 120 and the fingerprint sensor 130.

Alternatively, the supporting member 150 may be a hollow cylindrical structure in which the optical assembly 120 and the fingerprint sensor 130 are disposed, and the peripheral edge of the cover plate 110 is fixed to the hollow cylindrical structure through the adhesive layer 111, so that the cover plate 110 is disposed above the optical assembly 120 and the fingerprint sensor 130. The support 150 serves to protect the optical assembly 120 and the fingerprint sensor 130 while serving as a support.

Alternatively, if the optical fingerprint detection apparatus 100 of the embodiment of the present application is disposed in a key of an electronic device, the supporting member 150 can be reused as a structural member of the key, in other words, the supporting member 150 and the cover plate 110 can be manufactured according to the size of the key in the electronic device. As an example, if the key is a circular or oval key, the support 150 may be a hollow cylindrical structure having a ring shape, or may also be a hollow cylindrical structure having a frame shape.

As some examples, in the embodiment of the present application, the material of the supporting member 150 may be an organic plastic or a metal material, which has high mechanical strength and can play a role of stable support, so as to improve the reliability of the use of the optical fingerprint detection apparatus 100.

Specifically, in the embodiment of the present application, the cover plate 110 may be disposed over the optical assembly 120 and the fingerprint sensor 130, in other words, on a plane perpendicular to the Z direction in fig. 3, i.e., on the XY plane, the orthographic projection of the optical assembly 120 and the fingerprint sensor 130 is completely located in the orthographic projection of the cover plate 110.

Alternatively, the material of the cover plate 110 may be a transparent material, or the material of the cover plate 110 may also include a filter material for passing a target wavelength band. It is understood that the wavelength range of the target wavelength band should include at least part of the wavelength range of the optical signal emitted by the optical source 160, and preferably, the wavelength range of the target wavelength band is the wavelength range of the optical signal emitted by the optical source 160.

As an example, if the material of the cover plate 110 is a transparent material, the transparent material includes, but is not limited to, glass or resin.

As another example, if the material of the cover plate 110 includes a filter material for passing a target wavelength band, the cover plate 110 may be a cover plate structure formed by coating a filter material layer on a transparent substrate, the filter material layer may be coated on an inner surface and/or an outer surface of the transparent substrate. The cover plate 110 with the structure of this embodiment has a strong mechanical strength while achieving a light filtering function, and when the electronic device is affected by an external force, the cover plate can prevent the optical fingerprint detection device 100 from being damaged by the external force, thereby improving the reliability of the optical fingerprint detection device.

Preferably, in some embodiments, the light source 160 (not shown) is used to emit infrared light and/or near-infrared light to the finger above the cover plate 110, and accordingly, the infrared light and/or near-infrared light can be transmitted to the optical assembly 120 through the cover plate 110 after being reflected or transmitted by the finger. In this case, the cover 110 is required to transmit optical signals in infrared and/or near-infrared bands, in other words, the target bands include infrared and/or near-infrared bands. As an example, the inner and/or outer surfaces of the cover plate 110 may be coated with infrared-transmissive ink for transmitting light signals in an infrared band while blocking interfering light signals in a non-infrared band.

By adopting the scheme of the embodiment of the application, the infrared and/or near-infrared light is emitted by the light source, and the infrared light and/or near-infrared light transmitted by the finger is mainly utilized for optical fingerprint imaging so as to detect the fingerprint. Therefore, the requirement on the position of the light source is not high, and only the requirement that infrared light can reach the finger pressed on the cover plate is met. Therefore, the light source position in the optical fingerprint detection device in the embodiment of the application can be flexibly set according to the space conditions of different electronic devices.

Optionally, in the embodiment shown in fig. 3, the optical fingerprint detection apparatus 100 may further include: and the filter layer may be disposed between the cover plate 110 and the optical path of the fingerprint sensor 130, and is configured to filter the optical signals in the non-target wavelength band through the optical signals in the target wavelength band.

Specifically, similar to the filter material layer in the cover plate 110, the wavelength range of the target wavelength band passed by the filter layer should include at least part of the wavelength range of the optical signal emitted by the optical source 160, and preferably, the wavelength range of the target wavelength band is the wavelength range of the optical signal emitted by the optical source 160.

If the light source 160 is used to emit infrared light and/or near infrared light to a finger above the cover plate 110, correspondingly, the filter layer may be used to pass through an infrared band and/or a near infrared band, and filter a non-infrared band, for example, a visible band, so as to prevent the interference of ambient visible light or light leakage from the display screen to fingerprint detection.

Optionally, the filter layer may be an optical filter, which is fixed above the fingerprint sensor 130 through an adhesive layer and is used to cover the pixel array area of the fingerprint sensor 130. Alternatively, the filter layer may be formed on the surface of the fingerprint sensor 130 by direct coating, and packaged together with the fingerprint sensor 130 in a chip.

It is understood that, in the embodiment of the present application, the optical fingerprint detection apparatus 100 may include both the filter material layer in the cover plate 110 and the filter layer, or may include only one of the filter material layer in the cover plate 110 and the filter layer.

Fig. 4 shows another schematic structure of the optical fingerprint detection apparatus 100. The optical fingerprint sensing device 100 shown in fig. 4 may be a schematic cross-sectional structure along the YZ axis in fig. 1.

Alternatively, fig. 3 and 4 can be a schematic cross-sectional view of the same optical fingerprint detection device 100 along the XZ axis and a schematic cross-sectional view along the YZ axis, respectively. As can be seen from fig. 3 and 4, the length of the accommodating area 202 on the side of the electronic device and the optical fingerprint detection apparatus 100 in the Y-axis direction is greater than that in the X-axis direction.

Specifically, in the present embodiment, the optical fingerprint detection apparatus 100 includes an optical assembly 120 and a fingerprint sensor 130;

the length of the optical component 120 in the long side direction (i.e., Y direction) of the side surface of the electronic apparatus is greater than the length of the optical component 120 in the short side direction (i.e., X direction) of the side surface of the electronic apparatus; and is

The length of the fingerprint sensor 130 in the long side direction (i.e., Y direction) of the side of the electronic device is greater than the length of the fingerprint sensor 130 in the short side direction (i.e., X direction) of the side of the electronic device.

As an example, the microlenses in the microlens array 121 in the optical assembly 120 are circular microlenses or square microlenses, and the microlens array 121 is arranged in M arrangement along the X-axis direction₀Rows arranged in the Y-axis direction as N₀Column in which M₀、N₀Is a positive integer, and M₀＜N₀. Similarly, the pixel array in the fingerprint sensor 130 is arranged as M in the X-axis direction₁Rows arranged in the Y-axis direction as N₁Column in which M₁、N₁Is a positive integer, and M₁＜N₁。

As another example, fig. 5 shows another schematic structural diagram of the optical fingerprint detection apparatus 100. Fig. 3 and 5 are a schematic cross-sectional view of another optical fingerprint detection apparatus 100 along the XZ axis and a schematic cross-sectional view along the YZ axis, respectively.

As shown in fig. 3 and 5, the optical fingerprint detection device 100 includes: the plurality of optical assemblies 120 and the plurality of fingerprint sensors 130, the plurality of optical assemblies 120 are disposed above the plurality of fingerprint sensors 130 in a one-to-one correspondence, and the plurality of optical assemblies 120 and the plurality of fingerprint sensors 130 are all arranged along a long side of a side surface of the electronic device.

Optionally, in the embodiment of the present application, the length of each optical assembly 120 in the long side direction (i.e., Y direction) of the side of the electronic device is greater than the length thereof in the short side direction (i.e., X direction) of the side of the electronic device, and the length of each fingerprint sensor 130 in the long side direction (i.e., Y direction) of the side of the electronic device is greater than the length thereof in the short side direction (i.e., X direction) of the side of the electronic device.

In the embodiment of the present application, the technical solutions shown in fig. 3 and 4 or fig. 3 and 5 are adopted, the side space of the electronic device is fully utilized, the long strip-shaped accommodating area is disposed on the side of the electronic device in a matching manner, and the long optical assembly 120 and the fingerprint sensor 130 can be disposed along the long side direction of the electronic device, i.e., the Y-axis direction in the foregoing, or the large number of optical assemblies 120 and the fingerprint sensor 130 are disposed, so as to enlarge the fingerprint detection area, and improve the fingerprint detection effect.

In addition, in the embodiment shown in fig. 4 and 5, one side of the fingerprint sensor 130 may be connected to the first substrate 140 through the first lead 131, and the first lead 131 may be covered with the lead protection adhesive 132 around the first lead 131 to support and protect the first lead 131. Through the lead protective adhesive 132, the stability of the electrical connection between the first substrate 140 and the fingerprint sensor 130 can be ensured, and further, the performance of the optical fingerprint detection apparatus 100 can be ensured.

In the embodiment of the present application, in order to limit the thickness of the entire optical fingerprint detection device 100, the height of the wire protection paste 132 is not greater than 150 μm, wherein the height of the wire protection paste 132 refers to the height between the highest point in the Z direction and the first substrate 140.

As shown in fig. 4 and 5, in the embodiment of the present invention, the light source 160 may be disposed above the first substrate 140 and electrically connected to the first substrate 140.

In some embodiments, the light source 160 may be disposed together with the fingerprint sensor 130 in the cylindrical hollow structure of the support 150, the cover plate 110 is disposed over the light source 160, and both the cover plate 110 and the support 150 are used to protect the light source 160.

But to prevent interfering light signals, such as the emitted light signal of the light source 160 and/or non-finger reflected light signal, from directly entering the optical assembly 120 and the fingerprint sensor 130, interfering with fingerprint detection. The optical fingerprint detection apparatus 100 further includes: the light blocking structure 170 is disposed between the optical assembly 120 and the fingerprint sensor 130 and the light source 160 to block the interference light signal.

By way of example, the light blocking structure 170 includes, but is not limited to, a light-tight support structure that can further support the cover plate 110 while blocking interfering light signals. The light blocking structure 170 may be a foam, which is in a compressed state and may serve as a support.

In other embodiments, the light source 160 may be disposed outside the cylindrical hollow structure of the supporting member 150, and in this case, the supporting member 150 is used to block the light-emitting signal and/or the non-finger-reflected light signal of the light source 160 from directly entering the fingerprint sensor 130, which may interfere with fingerprint detection.

Fig. 6 shows another schematic configuration of the optical fingerprint detection device 100 in this embodiment. The optical fingerprint sensing device 100 shown in fig. 6 may be a schematic cross-sectional structure along the YZ axis in fig. 1. Fig. 3 and fig. 6 are a schematic cross-sectional view of another optical fingerprint detection apparatus 100 along an XZ axis and a schematic cross-sectional view along a YZ axis, respectively.

Alternatively, in the embodiment of the present application, the light source 160 may be a point light source, a line light source, or a surface light source. As an example, the Light source 160 may include one or more Light Emitting Diodes (LEDs) distributed around the fingerprint sensor 130.

Fig. 7 shows several schematic position designs of the light source in the embodiment of the present application, which may be a schematic cross-sectional structure along the plane of XY axis in fig. 1. Fig. 3, 6 and 7 are schematic cross-sectional views of another optical fingerprint detection device 100 along the XZ axis, the YZ axis and the XY axis, respectively.

As shown in fig. 7 (a), the support 150 has a hollow frame shape in cross section in the plane of the XY axis, and a plurality of LEDs are aligned in a row along the X axis direction and located on one side of the hollow frame shape. As shown in fig. 7 (b), the cross-section of the support 150 in the plane of the XY axis is a hollow frame, and the LEDs are distributed at four corners of the hollow frame.

Of course, the light source 160 may be other forms of light sources, such as a line light source, besides the plurality of LEDs shown in fig. 7 (a) or (b).

In addition, the light source 160 may be disposed at any position between the support 150 and the edge of the first substrate 140, that is, any position between two dotted frames as shown in fig. 7 (c), in addition to the position shown in fig. 7 (a) or (b).

In the embodiment of the present application, the light source 160 and the fingerprint sensor 130 are both disposed on the same first substrate 140, which facilitates the installation of the light source 160, and does not need to provide an additional electrical connection component for the light source 160, thereby facilitating the common control of the light source 160 and the fingerprint sensor 130 while reducing the cost.

Alternatively, the light source 160 may be provided in various positions in the following embodiments in addition to the positions of the embodiments shown in fig. 4 to 7 above.

Fig. 8 and 9 show two other schematic structural diagrams of the optical fingerprint detection device 100. The optical fingerprint sensing device 100 shown in fig. 8 and 9 may have a cross-sectional structure along the YZ axis in fig. 1.

As shown in fig. 8 and 9, in the embodiment of the present application, the light source 160 is not disposed in the first receiving area 2021 of the electronic device housing 201, but is disposed in the second receiving area 2022 of the electronic device housing 201, and other components of the optical fingerprint detection apparatus 100, including the cover plate 110, the optical assembly 120, the fingerprint sensor 120 and the supporting member 150, are disposed in the first receiving area 201.

In the case that the space available in the electronic device in the first receiving area 2021 is small, the embodiment shown in fig. 8 or fig. 9 can be selected, and the light source 160 is disposed in the second receiving area 2022, so as to flexibly adapt to the requirements of different electronic devices. Alternatively, the second receiving area 2022 may also be a groove, a through hole, or other types of receiving spaces.

Alternatively, in the embodiment shown in fig. 8, the light source 160 may be disposed above the first substrate 140, and the first substrate 140 is disposed below the first receiving area 2021 and the second receiving area 2022. In the embodiment shown in fig. 8, although the light source 160 and other components of the optical fingerprint detection apparatus 100 are not disposed in the same accommodation region, they are disposed above the first substrate 140, so as to facilitate the installation of the light source 160, and no additional electrical connection is required to be disposed on the light source 160, thereby facilitating the common control of the light source 160 and the fingerprint sensor 130 while reducing the cost.

In the embodiment shown in fig. 9, the optical fingerprint detection apparatus 100 further includes: a second substrate 161, wherein the second substrate 161 is disposed below the light source 160, and the second substrate 161 and the first substrate 140 may be disposed on the same plane or close to the same plane for transmitting a control signal to the light source 160 to control the light source 160 to emit light. As an example, the second substrate may be a flexible circuit board FPC, and a reinforcing plate 162 may be disposed thereunder, the reinforcing plate 162 and the second substrate 161 being used to support the light source 160 together. Alternatively, in the embodiment shown in fig. 9, one end of the second substrate 161 is used for connecting the light source 160, and the other end thereof can be used for connecting to other electrical modules of the electronic device to provide power and control signals for the light source 160.

In the embodiment shown in fig. 9, the second substrate 161 and the light source 160 are separately provided from other components of the optical fingerprint detection device 100. Facilitating removal and maintenance of the light source 160.

It should be noted that the structural schematic diagrams of the optical fingerprint detection device 100 shown in fig. 7 to 9 are only for illustrating the position design of the light source 160, and except for the design scheme of the light source 160, the related technical schemes of the cover plate 110, the optical assembly 120, the fingerprint sensor 130, the first substrate 140, the support 150, and the carrier 211 may refer to the related descriptions in fig. 2 to 7, and are not repeated herein.

It should be noted that the positions of the light sources 160 shown in fig. 4 to fig. 9 are only schematic illustrations, and besides the positions shown in the above embodiments, the light sources 160 may be disposed at other positions in the electronic device, and the optical element guides the optical signal emitted by the light sources 160 to the finger portion above the cover plate 110.

In the above embodiment, the optical assembly 120 and the fingerprint sensor 130 are disposed on the surface of the first substrate 140, and no light shielding structure is disposed around the optical assembly 120 and the fingerprint sensor 130, so that more interference light signals can be received, and certain interference is caused to fingerprint identification. In order to further improve the performance of the optical fingerprint sensing device 100, fig. 10 and 11 show two other schematic structural diagrams of the optical fingerprint sensing device 100, which are respectively schematic sectional structural diagrams along the plane of the XZ axis and the plane of the YZ axis in fig. 1, based on the above embodiments.

Alternatively, as shown in fig. 10 and 11, the optical fingerprint detection apparatus 100 may further include:

the light-shielding layer 180 has a first window 1801 formed therein, and the first window 1801 is located above the fingerprint sensor 130 and is configured to pass through the fingerprint light signal to be received by the fingerprint sensor 130. Specifically, the light shielding layer 180 may be used to shield stray light signals from entering the fingerprint sensor 130, so as to reduce interference of environmental factors on the fingerprint identification process.

In some embodiments of the present application, the light shielding layer 180 may be a light shielding glue layer, and optionally, the thickness of the light shielding layer 180 is 10-30 μm, for example, 20 μm. Of course, the thickness of the light shielding layer 180 may also be other specific values or within another preset value range, which is not specifically limited in this application.

Of course, in other alternative embodiments, a filter may be used instead of the light-shielding layer 180. Wherein the optical filter is used to reduce undesired ambient light in the fingerprint sensing to improve the optical sensing of the received light by the fingerprint sensor 130. The filter may specifically be used to filter out light of a particular wavelength, e.g., near infrared light and portions of red light, etc. For example, a human finger absorbs most of the energy of light with a wavelength below 580nm, based on which the filter can be designed to filter light with a wavelength from 580nm to the infrared to reduce the influence of ambient light on the optical detection in fingerprint sensing.

Optionally, in some embodiments, at least a portion of the optical assembly 120 is located in the first window 1801.

For example, as shown in fig. 10 and 11, the microlens array 121 of the optical assembly 120 is located in the first window 1801, at least one aperture layer of the optical assembly 120 is integrated with the fingerprint sensor 130 in the fingerprint sensor chip, and the peripheral region of the first window 1801 of the light shielding layer 180 is disposed on the surface of the edge region of the fingerprint sensor chip.

Alternatively, as shown in fig. 10 and 11, the optical fingerprint detection apparatus 100 may further include: the support layer 190 is disposed between the first substrate 140 and the light-shielding layer 180, and is used for supporting the light-shielding layer 180.

In the embodiment of the present application, a third opening window 1901 is disposed in the supporting layer 190, and the fingerprint sensor 130 is disposed in the third opening window 1901.

Specifically, the light shielding layer 180 is disposed on the surface of the supporting layer 190 and extends toward the fingerprint sensor 130, and a first window 1801 is formed around the microlens array 121. In other words, the supporting layer 190 supports a portion of the light shielding layer 180, and another portion of the light shielding layer 180 is suspended below or supported by the fingerprint sensor 130.

Optionally, the upper surface of the supporting layer 190 is not higher than the highest point of the upper surface of the microlens array 121 in the optical assembly 120, in other words, the highest point of the supporting layer 190 in the Z direction is not higher than the highest point of the optical assembly 120 in the Z direction.

Further, as shown in fig. 10 and 11, at least one diaphragm layer of the optical assembly 120 is integrated with the fingerprint sensor 130 in the fingerprint sensor chip, and the upper surface of the supporting layer 190 is not higher than the upper surface of the fingerprint sensor chip, in other words, the highest point of the supporting layer 190 in the Z direction is not higher than the highest point of the fingerprint sensor chip in the Z direction.

In some embodiments, the support layer 190 is fixed to the surface of the first substrate 140 by fixing glue. For example, the material of the support layer 190 includes, but is not limited to, metal, resin, glass fiber composite board, glue layer, and the like. For example, the support layer 190 is a polyethylene terephthalate (PET) material layer or a Polyimide (PI) material layer. For another example, the support layer 190 may be a scaffold formed from a foam material. Alternatively, the fixing glue may be a double-sided glue.

By the solution of the embodiment of the application, the supporting layer 190 does not additionally increase the thickness of the optical fingerprint detection device 100, but only supports the light shielding layer 180, so as to improve the stability of the light shielding layer 180.

With continued reference to fig. 10 and 11, to improve the reliability and stability of the cover plate 110, optionally, a foam 112 may be provided under the cover plate 110, which may be in a compressed state to further support the cover plate 110.

In the embodiment of the present application, the foam 112 may be disposed at any position in the hollow cylindrical structure of the supporting member 150 to support the cover plate 110. Optionally, in some embodiments, the foam 112 may be disposed around the optical assembly 110 and the fingerprint sensor 120, and particularly, may be disposed around the support layer 190 for connecting the first substrate 140 and the cover plate 110.

Preferably, in other embodiments, as shown in fig. 10 and 11, the foam layer 112 is disposed above the support layer 190 and the light shielding layer 180 for connecting the light shielding layer 180 and the cover plate 110, and the foam layer 112 can further function to block stray light while functioning to support the cover plate 110. Alternatively, the foam layer 112 may be connected between the light shielding layer 180 and the cover plate 110 by a tape (tape).

Alternatively, as shown in fig. 10 and 11, the foam layer 112 may be provided with a fourth window 1121 penetrating through the foam layer 112. Optionally, the fourth window 1121 is disposed above the optical assembly 120, specifically, above the microlens array 121, so as to receive the optical signal of the fingerprint through the optical assembly 120 and the fingerprint sensor 130. Optionally, the area of the fourth opening 1121 is not smaller than the area of the first opening 1801 in the light-shielding layer 180.

Further, with continued reference to fig. 11, the fingerprint sensor 130 is connected to the first substrate 140 by a first lead 131 disposed on one side of the fingerprint sensor 130. The supporting layer 190 is disposed on one side of the first lead 131 and the lead protection paste 132, and the light shielding layer 180 can directly cover the lead protection paste 132.

Optionally, a second window 1802 may be further disposed in the light shielding layer 180, wherein the top areas of the first lead 131 and the lead protection adhesive 132 are located in the second window 1802.

As shown in fig. 11, a partial light shielding layer 180 is also provided between the first lead wire 131 of the fingerprint sensor 130 and the microlens array 121, and the partial light shielding layer 180 is located between the first window 1801 and the third window 1802. The light shielding layer 180 can block stray light and also block the lead protection adhesive 132 from spreading to the microlens array 121, so as to prevent the light converging effect of the microlens array 121 from being affected.

It is understood that in the embodiment shown in fig. 10 to 11, the light source 160 is disposed in the hollow cylindrical structure of the support 150, and the foam 112, the light shielding layer 180 and the support layer 190 between the light source 160 and the optical assembly 120 and the fingerprint sensor 130 are multiplexed into the light blocking structure 170 in fig. 4 above.

It is further understood that, in the embodiments shown in fig. 10 and 11, the arrangement manner of the light source 160 may also adopt any one of the embodiments in fig. 6 to 9, and the related design of the light source 160 may refer to the above related description, which is not described in detail herein.

The preferred embodiments of the present application have been described in detail with reference to the accompanying drawings, however, the present application is not limited to the details of the above embodiments, and various simple modifications can be made to the technical solution of the present application within the technical idea of the present application, and these simple modifications are all within the protection scope of the present application.

For example, the various features described in the foregoing detailed description may be combined in any suitable manner without contradiction, and various combinations that may be possible are not described in this application in order to avoid unnecessary repetition.

For example, various embodiments of the present application may be arbitrarily combined with each other, and the same should be considered as the disclosure of the present application as long as the concept of the present application is not violated.

An embodiment of the present application further provides an electronic device, which may include:

the accommodating area is arranged on the side surface of the electronic equipment;

the carrier plate is arranged at the accommodating area; and

the optical fingerprint detection device of any one of the above application embodiments.

The accommodating area may be the accommodating area 202 in the embodiment of the above application, and includes: the first receiving area 20211 and/or the second receiving area 2022 may be the carrier 221 in any of the embodiments described above, and the optical fingerprint detection apparatus may be the optical fingerprint detection apparatus 100 in any of the embodiments described above.

In the embodiment of the present application, the optical fingerprint detection device 100 is fixed on the carrier 221 and disposed on a side surface of the electronic apparatus.

Optionally, the carrier 221 may be disposed in the accommodating area, or the carrier 221 is disposed in a first direction of the accommodating area, wherein the first direction faces an inner side of the electronic device.

Optionally, the carrier board 221 is a mechanical structure or an electrical structure in the electronic device.

It should be understood that the specific examples in the embodiments of the present application are for the purpose of promoting a better understanding of the embodiments of the present application and are not intended to limit the scope of the embodiments of the present application.

It is to be understood that the terminology used in the embodiments of the present application and the appended claims is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. For example, as used in the examples of this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Those of ordinary skill in the art will appreciate that the elements of the examples described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described above generally in terms of their functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed system and apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present application.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially or partially contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An optical fingerprint detection device, for setting up the holding area in the side of electronic equipment, optical fingerprint detection device includes:

a cover plate;

the optical assembly is connected to the fingerprint sensor and sequentially arranged in a first direction of the cover plate, and the first direction faces to the inner side of the side face of the electronic equipment;

a first substrate disposed in the first direction of the fingerprint sensor and configured to support the fingerprint sensor and the optical component, the first substrate being configured to be fixed to a carrier board at the accommodating area, so that the first substrate is disposed in a second direction of the carrier board, the second direction facing an outer side of a side surface of the electronic device;

a support connecting the cover plate and the first base plate to support the cover plate disposed in the second direction of the optical assembly and the fingerprint sensor;

the optical assembly is used for guiding the fingerprint optical signal to the fingerprint sensor so as to perform fingerprint detection.

2. The optical fingerprint detection device according to claim 1, wherein the cover plate is an arc cover plate, and an arc surface of the arc cover plate protrudes toward an outer side of the side surface of the electronic apparatus.

3. The optical fingerprint detection device according to claim 1, wherein the cover plate comprises a first surface and a second surface, the first surface is an arc surface, the first surface is convex toward the outer side of the side surface of the electronic apparatus, and the second surface is a plane;

the cover plate is used for converging the fingerprint optical signal to the optical assembly.

4. The optical fingerprint sensing device of claim 1, wherein the support member is a hollow cylindrical structure, the optical assembly and the fingerprint sensor being disposed in the hollow cylindrical structure;

the peripheral edge of the cover plate is fixed to the hollow columnar structure through a glue layer, so that the cover plate is arranged in the second direction of the optical assembly and the fingerprint sensor.

5. The optical fingerprint detection device according to claim 4, wherein the light source is disposed in the hollow cylindrical structure, and the cover plate is disposed in the second direction of the light source;

the optical fingerprint detection device further includes: and the light blocking structure is arranged between the optical assembly and the light source and between the fingerprint sensor and the light source.

6. The optical fingerprint sensing device of claim 1, wherein the optical fingerprint sensing device comprises one of the optical assemblies and one of the fingerprint sensors;

the length of the optical assembly along the long side direction of the side face of the electronic equipment is greater than the length of the optical assembly along the short side direction of the side face of the electronic equipment; and the number of the first and second electrodes,

the length of the fingerprint sensor along the long side direction of the side face of the electronic equipment is larger than the length of the fingerprint sensor along the short side direction of the side face of the electronic equipment.

7. The optical fingerprint sensing device of claim 1, wherein the optical fingerprint sensing device comprises a plurality of the optical components and a plurality of the fingerprint sensors, the plurality of the optical components corresponding to the plurality of the fingerprint sensors one-to-one;

the plurality of optical components and the plurality of fingerprint sensors are arranged along a long edge of a side face of the electronic device.

8. The optical fingerprint sensing device of claim 1, wherein the light source is disposed in the second direction of the first substrate and connected to the first substrate.

9. The optical fingerprint sensing device of claim 1, further comprising a second substrate, wherein the light source is disposed in the first direction of the second substrate and is connected to the second substrate.

10. The optical fingerprint detection device according to claim 8 or 9, wherein the cover plate, the optical assembly, the fingerprint sensor and the support are disposed in a first receiving area of a side of the electronic apparatus, the light source is disposed in a second receiving area of the side of the electronic apparatus, and the first receiving area is disposed adjacent to the second receiving area.

11. The optical fingerprint detection device according to claim 8 or 9, wherein the cover plate, the optical assembly, the fingerprint sensor, the support member and the light source are disposed in a first accommodation area of a side of the electronic apparatus.

12. The optical fingerprint detection device of any one of claims 1 to 9, wherein the optical assembly comprises:

a microlens array;

the at least one diaphragm layer is arranged below the micro lens array, and a plurality of light passing small holes are formed in each diaphragm layer in the at least one diaphragm layer;

the micro lens array is used for converging the fingerprint optical signal into the plurality of light-passing small holes of the at least one diaphragm layer, and the fingerprint optical signal is transmitted to the fingerprint sensor through the plurality of light-passing small holes to perform fingerprint detection.

13. The optical fingerprint sensing device of claim 12, wherein each microlens in the microlens array corresponds to at least one light passing aperture in each aperture layer, and at least one pixel element in the fingerprint sensor;

the fingerprint sensor is used for receiving fingerprint light signals in at least one direction so as to acquire at least one fingerprint image for fingerprint detection.

14. The optical fingerprint detection device according to any one of claims 1 to 9, further comprising:

a light shield layer, wherein a first window is formed, the first window is disposed in the second direction of the fingerprint sensor, and the first window is used for passing the fingerprint light signal to be received by the fingerprint sensor.

15. The optical fingerprint sensing device of claim 14, wherein the optical assembly is located in the first window.

16. The optical fingerprint sensing device of claim 14 wherein the light blocking layer further has a second window formed therein, wherein a top region of the first lead of the fingerprint sensor connected to the first substrate is located in the second window.

17. The optical fingerprint detection device of claim 16, wherein the first lead is coated with a lead protection paste, a top area of the lead protection paste is located in the second window in the second direction, and a height of the lead protection paste is less than 150 μm.

18. The optical fingerprint sensing device of claim 14, further comprising:

the supporting layer is arranged between the first substrate and the shading layer and is used for supporting the shading layer;

the fingerprint sensor is arranged in the third opening window, and in the second direction, the highest point of the supporting layer is not higher than that of the optical assembly.

19. The optical fingerprint sensing device of claim 14, further comprising:

the cotton layer of bubble, set up in the light shield layer the second direction, be formed with the fourth windowing in the cotton layer of bubble, the fourth windowing set up in optical component with fingerprint sensor the second direction, the fourth windowing is used for passing through fingerprint light signal with quilt optical component with fingerprint sensor receives, the area of fourth windowing is not less than in the light shield layer the area of first windowing.

20. The optical fingerprint sensing device of claim 19, wherein the foam layer is configured to couple the cover plate and the light shielding layer to support the cover plate.

21. The optical fingerprint detection device according to any one of claims 1 to 9, wherein the material of the cover plate is a transparent material, or the cover plate comprises a filter material, and the filter material is used for passing optical signals of a target wavelength band and filtering optical signals of a non-target wavelength band.

22. The optical fingerprint detection device according to any one of claims 1 to 9, further comprising: and the filter layer is arranged in a light path between the cover plate and the fingerprint sensor and is used for filtering the optical signals of the non-target wave bands through the optical signals of the target wave bands.

23. The optical fingerprint sensing device of claim 21, wherein the light source is configured to emit light signals in an infrared band, and the target band comprises the infrared band.

24. The optical fingerprint detection device according to any one of claims 1 to 9, wherein a key is disposed in the accommodation area, and the optical fingerprint detection device is disposed in the key.

25. The optical fingerprint sensing device of claim 24, wherein the key is used only for fingerprint sensing, or,

the key is used for realizing a fingerprint detection function and a target function of the electronic equipment.

26. An electronic device, comprising:

the carrier plate is arranged at the accommodating area; and

the optical fingerprint sensing device according to any one of claims 1 to 25, wherein said optical fingerprint sensing device is fixed to said carrier plate.

27. The electronic device of claim 26, wherein the carrier is disposed in the receiving area, or,

the carrier plate is arranged in a first direction of the accommodating area, wherein the first direction faces the inner side of the side face of the electronic equipment.

28. The electronic device of claim 26, wherein the carrier board is a mechanical structure or an electrical structure in the electronic device.