WO2022141607A1

WO2022141607A1 - Optical fingerprint detection apparatus and electronic device

Info

Publication number: WO2022141607A1
Application number: PCT/CN2020/142598
Authority: WO
Inventors: 王仁峰; 郭益平; 黄新利; 刘凯; 龙卫
Original assignee: 深圳市汇顶科技股份有限公司
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-07-07

Abstract

An optical fingerprint detection apparatus (100) and an electronic device, which take into account the performance of the optical fingerprint detection apparatus (100) whilst reducing the space occupied by same in the electronic device. The optical fingerprint detection apparatus (100) is arranged in an accommodating area of the side surface of the electronic device, and comprises: a cover plate (110); an optical assembly (120) and a fingerprint sensor (130), the optical assembly (120) being connected to the fingerprint sensor (130), and being arranged in sequence in a first direction of the cover plate (110), the first direction being toward the inner side of the side surface of the electronic device; a first substrate (140) arranged in the first direction of the fingerprint sensor (130), the first substrate (140) being fixed to a carrier plate (211) at the accommodating area, such that the first substrate (140) is arranged in a second direction of the carrier plate (211), the second direction being toward the outer side of the side surface of the electronic device; a support member (150) connecting the cover plate (110) and the first substrate (140) in order to support the cover plate (110) to be arranged in the second direction of the optical assembly (120); and a light source (160) used for emitting optical signals to a finger at the cover plate (110), the optical signals forming fingerprint optical signals carrying fingerprint information after passing through the finger, and the optical assembly (120) being used for directing the fingerprint optical signals to the fingerprint sensor (130).

Description

Optical fingerprint detection device and electronic equipment

technical field

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

Background technique

With the development of biometric technology, fingerprint detection technology is widely used in mobile terminal design, automotive electronics, smart home and other fields. Consumers have increased functional requirements for various electronic terminal products, and at the same time require the product size to be as light and thin as possible. Therefore, the internal structure of electronic products is becoming more and more compact, and the structural design of the fingerprint detection function device is more difficult. As a result, the fingerprint detection device is miniaturized and combined with other functional devices. The demand for integration is increasingly urgent, requiring fingerprint detection devices to achieve more accurate functions while occupying a smaller volume of electronic products.

At present, the mainstream fingerprint detection devices are mainly capacitive fingerprint detection devices and optical fingerprint detection devices. Among them, the optical fingerprint detection device is generally installed inside the display screen of the electronic device or below the display screen, and integrated inside the display screen will display the display on the display screen. The function will have a certain impact, and setting it under the display screen will occupy a part of the thickness space of the electronic device, which is not conducive to the development of thin and light electronic devices.

Therefore, how to reduce the space occupied by the optical fingerprint detection device on the premise of taking into account the performance of the optical fingerprint detection device is an urgent technical problem to be solved.

SUMMARY OF THE INVENTION

The embodiments of the present application provide an optical fingerprint detection device and an electronic device, which can reduce the space occupied in the electronic device under the premise of taking into account the performance of the optical fingerprint detection device, which is beneficial to the development of miniaturization and thinning of the electronic device.

In a first aspect, an optical fingerprint detection device is provided, which is used to be arranged in an accommodating area on the side of an electronic device, the optical fingerprint detection device includes: a cover plate; an optical component and a fingerprint sensor, the optical component is connected to the fingerprint sensor, The first substrate is arranged in the first direction of the cover plate, and the first direction faces the inner side of the side of the electronic device; the first substrate is arranged in the first direction of the fingerprint sensor and is used to support the fingerprint sensor and the optical component. , the first substrate is used to be fixed to the carrier board at the accommodating area, so that the first substrate is arranged in the second direction of the carrier board, and the second direction faces the outer side of the side of the electronic device; a cover plate and the first substrate to support the cover plate arranged in the second direction of the optical component and the fingerprint sensor; a light source for emitting a light signal to the finger at the cover plate, and the light signal is reflected by the finger Or after transmission, a fingerprint light signal carrying fingerprint information is formed, and the optical component is used to guide the fingerprint light signal to the fingerprint sensor for fingerprint detection.

Through the technical solutions of the embodiments of the present application, optical fingerprint imaging is performed by using an optical component and a fingerprint sensor, the optical component and the fingerprint sensor are connected to each other, and the overall thickness is small. In addition, in the embodiment of the present application, the optical fingerprint detection device is arranged in the accommodating area of the side of the electronic device, and the thickness space of the side of the electronic device is utilized, and the optical fingerprint detection device does not need to be arranged under the display screen, thereby The space under the screen is saved, which is conducive to the development of thin and light electronic devices.

In some possible implementations, the cover plate is an arc surface cover plate, and the arc surface of the arc surface cover plate protrudes toward the outer side of the side surface of the electronic device.

In some possible implementations, the cover plate includes a first surface and a second surface, the first surface is an arc surface, the arc surface is convex toward the outer side of the side surface of the electronic device, the second surface is a flat surface, and the cover The plate is used to condense the fingerprint light signal to the optical assembly.

In the embodiment of the present application, the second surface of the cover plate is designed to be flat, which is convenient for connection with the support member and improves the support stability of the cover plate. In addition, the first surface of the cover plate is designed as an arc surface, and the first surface of the arc surface cover plate is used for contact with the user's finger. What is important is that the arc of the arc cover can be designed according to the curvature of the side of the electronic device, so that the arc cover and the side of the electronic device form a good fit and improve the appearance of the electronic device. In addition, the cover plate is a convex lens structure, which has the function of condensing light, that is, the above-mentioned fingerprint light signal formed with fingerprint information after being reflected or transmitted by the finger is concentrated to the optical component, so as to improve the light intensity of the fingerprint light signal received by the optical component. , thereby further improving the performance of the optical fingerprint detection device.

In this regard, the current capacitive fingerprint detection devices installed on the surface of electronic equipment are generally flat structures, which are relatively simple in appearance, have no three-dimensional sense, and have poor customer experience. This leads to problems such as misjudgment of fingerprint identification, and when the mobile phone is dropped, it will damage the plane of the entire capacitive fingerprint detection device, which affects the performance of the fingerprint detection device. And even if the arc cover is set above the capacitive fingerprint detection device, since the detection principle of the capacitive fingerprint detection device is based on the capacitance detection between the finger and the electrode, the arc cover will affect the capacitance between the finger and the electrode, causing The fingerprint signal detected by the capacitive fingerprint detection device becomes smaller, which affects the performance of fingerprint detection. Further, if the arc of the arc surface cover is too large and the distance between the finger and the capacitive fingerprint device is too far, it may cause the capacitive fingerprint detection device. The detected fingerprint signal is not available, therefore, the radian of the curved cover cannot be designed correspondingly according to the radian of the surface of the electronic device. To sum up, it is not suitable to add a cover plate structure on the surface of the capacitive fingerprint detection device, and the optical fingerprint detection device is superior to the capacitive fingerprint detection device in the aesthetics and adaptability of the electronic equipment.

In some possible implementations, the support is a hollow cylindrical structure, and the optical component and the fingerprint sensor are arranged in the hollow cylindrical structure; the surrounding edges of the cover plate are fixed to the hollow cylindrical structure through an adhesive layer, so that the The cover plate is arranged in the second direction of the optical component and the fingerprint sensor.

In some possible implementations, 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: a light blocking structure disposed in the optical component and the light source. between the fingerprint sensor and the light source.

In some possible implementations, the optical fingerprint detection device includes an optical component and a fingerprint sensor; the length of the optical component along the long side of the side of the electronic device is greater than the length of the optical component along the side of the electronic device and the length of the fingerprint sensor along the long side of the side of the electronic device is greater than the length of the fingerprint sensor along the short side of the side of the electronic device.

In some possible implementations, the optical fingerprint detection device includes a plurality of the optical components and a plurality of the fingerprint sensors, and the plurality of the optical components correspond to the plurality of the fingerprint sensors one-to-one; a plurality of the optical components and a plurality of the fingerprint sensors The fingerprint sensors are all arranged along the long sides of the sides of the electronic device.

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

In some possible implementations, 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 implementations, the cover plate, the optical assembly, the fingerprint sensor and the support are arranged in a first accommodating area on the side of the electronic device, and the light source is arranged on a second side of the electronic device. In the accommodating area, the first accommodating area is adjacent to the second accommodating area.

In some possible implementations, the cover plate, the optical assembly, the fingerprint sensor, the support member and the light source are all disposed in the first accommodating area on the side of the electronic device.

In some possible implementations, the optical component includes: a microlens array; at least one diaphragm layer disposed below the microlens array, and each diaphragm layer of the at least one diaphragm layer is formed with a plurality of light-passing layers A small hole; the microlens array is used for converging the fingerprint light signal into a plurality of light-passing holes in the at least one aperture layer, and the fingerprint light signal is transmitted to the fingerprint sensor through the plurality of light-passing holes for processing. Fingerprint detection.

In some possible implementations, each microlens in the microlens array corresponds to at least one light-passing aperture in each diaphragm layer, and at least one pixel unit in the fingerprint sensor; the fingerprint sensor is used for A fingerprint light signal in at least one direction is received to acquire at least one fingerprint image for fingerprint detection.

In some possible implementations, the optical fingerprint detection device further includes: a light-shielding layer in which a first window is formed, the first window is arranged in the second direction of the fingerprint sensor, and the first window is used for Pass the fingerprint light signal to be received by the fingerprint sensor.

In some possible embodiments, the optical assembly is located in the first fenestration.

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

In some possible implementations, the first lead is covered with lead protection glue, in the second direction, the top region of the lead protection glue is located in the second opening, and the height of the lead protection glue is less than 150 μm .

In some possible implementations, the optical fingerprint detection device further includes: a support layer disposed between the first substrate and the light shielding layer for supporting the light shielding layer;

The support layer is provided with a third window, the fingerprint sensor is arranged in the third window, and in the second direction, the highest point of the support layer is not higher than the highest point of the optical component.

In some possible implementations, the optical fingerprint detection device further includes: a foam layer disposed in the second direction of the light shielding layer, a fourth window is formed in the foam layer, and the fourth window is disposed on the The second direction of the optical component and the fingerprint sensor, the fourth window is used to pass the fingerprint light signal to be received by the optical component and the fingerprint sensor, and the area of the fourth window is not smaller than the area of the light shielding layer. The area of the first window opening.

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 implementations, the cover plate is made of a transparent material, or the cover plate includes a filter material, and the filter material is used to pass the light signal of the target wavelength band and filter the light signal of the non-target wavelength band.

In some possible implementations, the optical fingerprint detection device further includes: a filter layer, disposed in the optical path between the cover plate and the fingerprint sensor, for passing the optical signal of the target wavelength band and filtering the light of the non-target wavelength band Signal.

In some possible implementations, the light source is used to emit light signals in an infrared wavelength band, and the target wavelength band includes an infrared wavelength band.

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

In some possible implementations, the key is only used to implement the fingerprint detection function, or the key is used to implement 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 disposed on a side surface of the electronic device; a carrier plate disposed at the accommodating area; and any one of the first aspect or the first aspect is possible In the optical fingerprint detection device in the embodiment, the optical fingerprint detection device is fixed on the carrier board.

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

In some possible implementations, the carrier board is a mechanical structure or an electrical structure in the electronic device.

Description of drawings

FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the present application.

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

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

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

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

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

FIG. 8 is another schematic structural diagram of an optical fingerprint detection apparatus according to an embodiment of the present application.

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

FIG. 10 is another schematic structural diagram of an optical fingerprint detection apparatus according to an embodiment of the present application.

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

Detailed ways

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 can 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 only take an optical fingerprint detection system as an example for description, but should not constitute any limitation to the embodiments of the present application, and the embodiments of the present application are also applicable to other systems adopting optical imaging technology and the like.

As a common application scenario, the optical fingerprint detection system provided by the embodiments of the present application can be applied to smart phones, tablet computers, smart 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 used for optically imaging the fingerprint, and the processing unit is used for fingerprint detection and identification of the fingerprint image. and other processing to obtain relevant detection results and identification results and provide them to the electronic device, so as to meet the relevant needs of users. In this embodiment of the present application, the optical fingerprint detection device may be disposed on any surface of the electronic device that interacts with the user, including but not limited to the front, back, or side surface of the electronic device.

As an example, as shown in FIG. 1 , the electronic device in which the optical fingerprint detection system provided by the embodiment of the present application is located is a mobile phone, wherein the optical fingerprint detection device may be arranged on the side of the mobile phone. As an example, it may be embedded, raised or flat. It is arranged on the side of the mobile phone, and the present application does not specifically limit the configuration of the arrangement on the side of the mobile phone.

In some embodiments, the optical fingerprint detection device may be an independent component disposed on the side of the mobile phone, and is only used to realize the fingerprint detection function;

In other embodiments, the optical fingerprint detection device can be integrated on a target button on the side of the mobile phone. For example, the target button includes but is not limited to a power button of an electronic device. The power button is used to start/wake up the mobile phone. In addition, it can also be used to realize the function of fingerprint detection. Further, in this embodiment, on the basis of successful fingerprint detection, the mobile phone can be restarted/wake up to improve the security performance of mobile phone authentication.

FIG. 2 shows a schematic structural diagram of an optical fingerprint detection apparatus 100 in an embodiment of the present application. The optical fingerprint detection device 100 can be disposed on the side of the mobile phone in FIG. 1 , optionally, it can be fixedly disposed on the side of the mobile phone, or can also be disposed on the buttons on the side of the mobile phone shown in FIG. 1 . Specifically, the schematic structural diagram shown in FIG. 2 may be a schematic cross-sectional structural diagram along the plane where the XZ axis in FIG. 1 is located. The positive direction of the Z axis is the direction toward the outside of the side surface of the electronic device, and the negative direction of the Z axis is the direction toward the inner side of the side surface 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 , an accommodating area 202 is formed on the side of the outer frame 201 of the electronic device. The accommodating area 202 may be a through hole, a groove or an area in a key. The optical fingerprint detection device 100 is arranged in the accommodating area. area 202.

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

Wherein, the optical component 120 is connected to the fingerprint sensor 130, and is sequentially arranged in the first direction of the cover plate 110, and the first direction faces the inner side of the side surface of the electronic device;

The first substrate 140 is disposed in the first direction of the fingerprint sensor 130 and used to support the fingerprint sensor 130 and the optical component 120 , and the first substrate 140 is used to be fixed to the carrier board 211 at the accommodating area 202 , so that the first substrate 140 is 140 is arranged in the second direction of the carrier board 211, and the second direction faces the outer side of the side surface of the electronic device;

The support member 150 is connected to the cover plate 110 and the first substrate 140 , and is used to support the cover plate 110 in 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 110, the light signal is reflected or transmitted by the finger to form a fingerprint light signal carrying the fingerprint information of the finger, and the optical component 120 is used for guiding the fingerprint light signal into the finger. fingerprint sensor 130 for fingerprint detection and/or fingerprint recognition.

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

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

It can be understood that, in addition to the above-mentioned fingerprint optical signal carrying the fingerprint information of the finger, the optical signal formed by the reflection or transmission of the finger may also carry biometric information such as pulse, blood oxygen, and veins. In other words, in addition to detecting fingerprints, the optical fingerprint detection device of the embodiments of the present application can also be used to detect other biometric information such as pulse, blood oxygen, and veins, so as to perform other functions such as living body detection and human health detection.

It can also be understood that the "first direction" in the above is toward the inner side of the side surface of the electronic device, that is, the "first direction" may be the negative direction of the Z-axis shown in Figures 1 and 2. In Figure 2, "" The first direction" can also be written as "below". Correspondingly, the "second direction" in the above is toward the outside of the side surface of the electronic device, that is, the "second direction" may be the positive direction of the Z-axis shown in Figures 1 and 2. In Figure 2, the "second direction" ” can also be written as “above.” In order to facilitate the description of the relevant embodiments in the present application with reference to the accompanying drawings, except for the description in special cases, hereinafter "upper" refers to the "second direction" toward the outside of the electronic device, and "downward" refers to the direction toward the outer side of the electronic device. Inside "first direction".

Based on the related descriptions in FIGS. 1 and 2 , an embodiment of the present application provides an optical fingerprint detection device, which uses an optical component and a fingerprint sensor to perform optical fingerprint imaging, the optical component and the fingerprint sensor are connected to each other, and the overall thickness is small. In addition, in the embodiment of the present application, the optical fingerprint detection device is arranged in the accommodating area of the side of the electronic device, and the thickness space of the side of the electronic device is utilized, and the optical fingerprint detection device does not need to be arranged under the display screen, thereby The space under the screen is saved, which is conducive to the development of thin and light electronic devices.

Further, the above-mentioned optical fingerprint detection device may be integrated into a button on the side of the electronic device. In this case, the above-mentioned carrier board 211 may be a structural member of the button. Optionally, the key may be a dedicated key for fingerprint detection, or may also be a multifunctional key for fingerprint detection and other target functions of the electronic device. By adopting this embodiment, it is convenient for the user to quickly find the buttons on the surface of the electronic device for fingerprint detection, which can improve user experience. The optical fingerprint detection device of the invention reuses the space of the key, which further improves the space utilization in the electronic equipment.

FIG. 3 shows another schematic structural diagram of the optical fingerprint detection apparatus 100 , and the structural schematic diagram may be a cross-sectional structural schematic diagram along the plane where the XZ axis in FIG. 1 is located.

Optionally, in the embodiment of the present application, the cover plate 110 may be an arc surface cover plate, and the arc surface protrudes 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 an arc surface, the first surface is convex toward the outer side of the side surface of the electronic device, and the second surface is a flat surface, which is convenient for connecting with the supporting member 150 to connect.

Specifically, the first surface of the curved cover is used for contact with the user's finger. Compared with the flat cover, the curved cover can improve the contact experience of the user's finger. More importantly, the curved cover The curvature of the arc surface can be designed according to the curvature of the side surface of the electronic device, so that the arc surface cover plate forms a good fit with the side surface of the electronic device, and improves the appearance of the electronic device.

Continuing to refer to FIG. 3 , optionally, in the optical fingerprint detection device 100 , the optical component 120 may include: a microlens array 121 and a diaphragm layer 122 disposed below the microlens array 121 . The microlens array 121 includes a plurality of microlenses, and each microlens is used for condensing the light signal above it and transmitting it to the diaphragm layer below it. The diaphragm layer 122 is made of a light absorbing material, and is provided with a plurality of light-passing holes, which are used to select the direction of the light signal after the microlens converges, so that the light signal in the target direction passes through the light-passing hole. The light hole enters the fingerprint sensor 130, and the stray light signal in the non-target direction is absorbed by the light absorbing material that does not pass through the area where the small hole is located, thereby preventing the stray light signal from interfering with fingerprint imaging.

The fingerprint sensor 130 includes a pixel array (Pixel Array) formed by a plurality of pixel (Pixel) units, which is used to convert the light signal passing through the diaphragm layer 122 into a corresponding image signal. Specifically, the fingerprint sensor 130 may be a fingerprint sensor chip fabricated 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 layer of diaphragm layers 122 , and optionally, the optical assembly 120 may also include multiple layers of diaphragm layers 122 . The fingerprint sensor 130 includes a pixel array composed of a plurality of pixel units, each microlens in the microlens array 121 corresponds to at least one light-passing aperture in each diaphragm layer 122, and at least one pixel unit in the pixel array , each microlens transmits the concentrated optical signal to the inside of the corresponding light-passing hole and transmits it to the corresponding pixel unit via the light-passing hole to perform optical fingerprint imaging.

Optionally, multiple pixel units in the fingerprint sensor 130 can be used to receive fingerprint light signals in the same direction, for example, multiple pixel units all receive fingerprint light signals perpendicular to the display screen, or multiple pixel units all receive oblique fingerprint signals. The fingerprint light signal in the specific direction of the display screen.

Optionally, the plurality of pixel units in the fingerprint sensor 130 can also be used to receive fingerprint light signals in different directions to form fingerprint image signals of a plurality of fingerprint images. For example, a first part of the pixel units in the plurality of pixel units receives one direction. The fingerprint light signal of the first fingerprint image is formed; the second part of the pixel unit receives the fingerprint light signal of the other direction to form the fingerprint image signal of the second fingerprint image.

In some embodiments, the aperture layer 122 may be grown over the fingerprint sensor 130 by semiconductor process growth or other processes, for example, by atomic layer deposition, sputter coating, electron beam evaporation coating, ion beam coating, etc. on the fingerprint sensor A layer of non-light-transmitting material film is prepared on the top of 130, and then photolithography and etching of the pinhole pattern are performed to form a plurality of light-transmitting pinholes. It can be understood that, in the case where the optical assembly 120 includes a plurality of diaphragm layers 122, a transparent medium layer may be passed between the lowest diaphragm layer 122 and the fingerprint sensor 130, as well as between the adjacent diaphragm layers 122. isolate.

It can be understood that, in addition to the structure shown in FIG. 3 , the optical component 120 can also be other light guiding structures, such as a collimator layer, having a plurality of collimating units or a micro-hole array, etc., The specific structure of the optical assembly 120 is not limited in this embodiment of the present application.

In the embodiment of the present application, the optical assembly 120 adopts the above-mentioned structure. Compared with the optical fingerprint detection device based on optical lens imaging, it is not limited by the imaging optical path of the lens, and the thickness of the optical assembly is reduced, which is beneficial to realize the optical fingerprint detection device. Thinner. In addition, compared with the optical fingerprint detection device based on the imaging of the collimator layer, it uses a microlens array to condense the optical signal, and uses one or more diaphragm layers to guide the direction of the optical signal, which can further improve the fingerprint light intensity. The quality of the signal is improved, thereby improving the fingerprint detection performance of the optical fingerprint detection device.

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

In addition, it can be understood that the cover plate 110 can be a convex lens structure, which has the function of condensing light, that is, the above-mentioned fingerprint light signal formed carrying fingerprint information after being reflected or transmitted by the finger is converged to the optical component 120, so as to improve the optical component 120. The light intensity of the received fingerprint light signal further improves the performance of the optical fingerprint detection device 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 an adhesive layer, which includes but is not limited to a die attach film (Die Attach Film, DAF) adhesive layer. While supporting the fingerprint sensor 130, the first substrate 140 is used for electrical connection with the fingerprint sensor 130, and transmits the photoelectrically converted fingerprint electrical signal of the fingerprint sensor 130 to the processing unit to perform subsequent processing operations such as fingerprint detection.

As an example, the first substrate 140 includes, but is not limited to, a printed circuit board (Printed Circuit Board, PCB), a flexible printed circuit board (Flexible Printed Circuit, FPC), a rigid-flex board, or other types of circuit boards, to which the embodiments of the present application There is no specific limitation. Optionally, the electrical connection method 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 (Flip Chip, FC) ) or other types of electrical connection methods, etc., which are not specifically limited in the embodiments of the present application.

It can be 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 140 to enhance the mechanical strength of the FPC and support the fingerprint sensor 130 above it. As an example, the reinforcing plate 141 includes, but is not limited to, a reinforcing steel plate, and may also be other types of reinforcing plates in the related art, which are not specifically limited in the embodiments of the present application.

Optionally, the fingerprint sensor 130 can be directly disposed above the FPC, or a window can be formed in the FPC, and the fingerprint sensor 130 can be disposed in the window and above the reinforcing plate. Using the former embodiment, the preparation process is simple and the production can be improved. Efficiency, by adopting the latter embodiment, the height of the optical fingerprint detection apparatus 100 can be reduced, thereby reducing the space occupied by the electronic equipment.

In some embodiments, the first substrate 140 may only be used as a circuit board of the fingerprint sensor 130 for transmitting electrical signals of the fingerprint sensor 130 and supporting the fingerprint sensor 130 and the supporting member 150 above it. A processing unit and other types of electrical components may also be disposed on a substrate 140 for performing a complete fingerprint detection function.

In other embodiments, the first substrate 140 can also be a circuit board of other functional modules in the electronic device, and on this basis, it can be multiplexed into a circuit board of the fingerprint sensor 130 at the same time.

In the embodiment of the present application, the optical fingerprint detection device 100 can be fixedly disposed on the side of the electronic device by fixing the reinforcing plate 141 above the carrier board 211 of the electronic device.

Further, as shown in FIG. 3 , the cover plate 110 can be connected to the support member 150 through the adhesive layer 111 , and the support member 150 is fixedly disposed on the first substrate 140 to fix the cover plate 110 on the optical component 120 and the fingerprint sensor 130 . above.

Optionally, the support member 150 may be a hollow cylindrical structure in which the optical component 120 and the fingerprint sensor 130 are disposed, and the surrounding edges of the cover plate 110 are fixed to the hollow cylindrical structure through the adhesive layer 111, so that the cover plate 110 is disposed above the optical component 120 and the fingerprint sensor 130 . The supporting member 150 is also used to protect the optical assembly 120 and the fingerprint sensor 130 while playing a supporting role.

Optionally, if the optical fingerprint detection device 100 in the embodiment of the present application is arranged in a key of an electronic device, the support 150 can be reused as a structural member of the key, in other words, according to the shape and size of the key in the electronic device, The shape and size of the support member 150 and the cover plate 110 are manufactured. As an example, if the keys are circular or waist-shaped keys, the support member 150 may be an annular hollow cylindrical structure, or may also be a frame-shaped hollow cylindrical structure.

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

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 , that is, on the XY plane, the optical assembly 120 and the fingerprint sensor 130 The orthographic projection of the fingerprint sensor 130 is completely located in the orthographic projection of the cover plate 110 .

Optionally, 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 the target wavelength band. It can be 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 light source 160 , and preferably, the wavelength range of the target wavelength band is the wavelength range of the optical signal emitted by the light 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 the 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 Layers can be applied to the inner and/or outer surfaces of the transparent substrate. The cover plate 110 adopts the structure scheme of this embodiment, which can realize the filter function and have strong mechanical strength, and can prevent the external force from causing damage to the optical fingerprint detection device 100 when the electronic device is affected by external force, thereby improving the optical fingerprint detection. reliability of the detection device.

Preferably, in some embodiments, the light source 160 (not shown in the figure) is used to emit infrared light and/or near-infrared light to the finger above the cover plate 110, correspondingly, the infrared light and/or near-infrared light can After being reflected or transmitted by the finger, it is transmitted to the optical assembly 120 through the cover plate 110 . In this case, the cover plate 110 needs to transmit light signals in the infrared and/or near-infrared band, in other words, the target band includes the infrared and/or near-infrared band. As an example, the inner surface and/or the outer surface of the cover plate 110 may be coated with infrared-transmitting ink for transmitting light signals in the infrared band and blocking interfering light signals in the non-infrared band.

Using the solutions of the embodiments of the present application, infrared and/or near-infrared light is emitted through a light source, and the infrared light and/or near-infrared light transmitted by the finger is mainly used for optical fingerprint imaging to perform fingerprint detection. Therefore, the position requirement of the light source is not high, and it only needs to satisfy that the infrared light can reach the finger pressing on the cover plate. Therefore, the position of the light source in the optical fingerprint detection apparatus in the embodiment of the present 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 device 100 may further include: a filter layer, which may be disposed between the optical path from the cover plate 110 to the fingerprint sensor 130 for passing the light of the target wavelength band signal, filter out the optical signal in the non-target band.

Specifically, similar to the filter material layer in the cover plate 110 above, 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 light source 160, preferably, the wavelength of the target wavelength band The range is the wavelength range of the optical signal emitted by the light source 160 .

If the light source 160 is used to emit infrared light and/or near-infrared light to the finger above the cover plate 110, correspondingly, the filter layer can be used to pass the infrared light band and/or the near-infrared light band, and filter the non-infrared light band, such as filtering In addition to the visible light band, prevent ambient visible light or light leakage from the display from interfering with fingerprint detection.

Optionally, the filter layer may specifically be a filter, which is fixed above the fingerprint sensor 130 through an adhesive layer and used to cover the pixel array area of the fingerprint sensor 130 . Alternatively, the filter layer can also be directly coated on the surface of the fingerprint sensor 130 and packaged in the chip together with the fingerprint sensor 130 .

It can be understood that, in this embodiment of the present application, the optical fingerprint detection device 100 may include both the filter material layer and the filter layer in the cover plate 110, or may only include the filter layer in the cover plate 110. One of the material layer and the above-mentioned filter layer.

FIG. 4 shows another schematic structural diagram of the optical fingerprint detection apparatus 100 . The optical fingerprint detection device 100 shown in FIG. 4 may be a schematic cross-sectional structure diagram along the plane of the YZ axis in FIG. 1 .

Optionally, FIG. 3 and FIG. 4 may be a schematic cross-sectional view of the same optical fingerprint detection device 100 along a plane where the XZ axis is located and a schematic cross-sectional view along the plane where the YZ axis is located. It can be seen from FIG. 3 and FIG. 4 that the length of the accommodating area 202 on the side of the electronic device and the optical fingerprint detection device 100 in the Y-axis direction is greater than the length in the X-axis direction.

Specifically, in the embodiment of the present application, the optical fingerprint detection device 100 includes an optical component 120 and a fingerprint sensor 130;

The length of the optical assembly 120 along the long-side direction (i.e., the Y direction) of the side of the electronic device is greater than the length of the optical assembly 120 along the short-side direction (i.e., the X direction) of the side of the electronic device; and

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

As an example, the microlenses in the microlens array 121 in the optical component 120 are circular microlenses or square microlenses, and the microlens array 121 is arranged in M0 rows along the X-axis direction and N0 columns along the Y-axis direction, wherein , M0 and N0 are positive integers, and M0<N0. Similarly, the pixel arrays in the fingerprint sensor 130 are arranged in M1 rows along the X-axis direction and N1 columns along the Y-axis direction, wherein M1 and N1 are positive integers, and M1<N1.

As another example, FIG. 5 shows another schematic structural diagram of the optical fingerprint detection apparatus 100 . 3 and 5 may be a schematic cross-sectional view of another optical fingerprint detection device 100 along a plane where the XZ axis is located and a schematic cross-sectional view along the plane where the YZ axis is located.

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

Optionally, in this embodiment of the present application, the length of each optical component 120 along the long-side direction (ie, the Y direction) of the side of the electronic device is greater than its length along the short-side direction (ie, the X direction) of the side of the electronic device. , and the length of each fingerprint sensor 130 along the long-side direction (ie, the Y direction) of the side of the electronic device is greater than its length along the short-side direction (ie, the X direction) of the side surface of the electronic device.

In the embodiments of the present application, the technical solutions shown in FIGS. 3 and 4 above, or the technical solutions shown in FIGS. 3 and 5 are used to make full use of the side space of the electronic device, and an elongated accommodating area is arranged on the side of the electronic device. , a longer optical assembly 120 and a fingerprint sensor 130, or a larger number of optical assemblies 120 and fingerprint sensors 130 can be set along the long side direction of the electronic device, that is, the Y-axis direction above, to expand fingerprint detection area, so as to improve the fingerprint detection effect.

In addition, in the embodiment shown in FIG. 4 and FIG. 5 , one side of the fingerprint sensor 130 can be connected to the first substrate 140 through the first lead 131 , and the first lead 131 can be covered with lead protection glue 132 . In order to support and protect the first lead 131 . Through the lead protection 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 device 100 can be guaranteed.

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 lead protection glue 132 is not greater than 150 μm, wherein the height of the lead protection glue 132 refers to the height of the highest point in the Z direction and the first A height between substrates 140 .

As shown in FIGS. 4 and 5 , in the embodiment of the present application, 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 and the fingerprint sensor 130 can be disposed in the cylindrical hollow structure of the support member 150 , the cover plate 110 is disposed above the light source 160 , and both the cover plate 110 and the support member 150 are used to protect the light source 160 .

However, in order to prevent interfering light signals such as emitted light signals and/or non-finger reflected light signals from the light source 160 from directly entering the optical assembly 120 and the fingerprint sensor 130 , causing interference to fingerprint detection. The optical fingerprint detection device 100 further includes: a light blocking structure 170 disposed between the optical component 120 and the fingerprint sensor 130 and the light source 160 to block the above-mentioned interfering light signals.

As an example, the light blocking structure 170 includes, but is not limited to, an opaque support structure, which can further support the cover plate 110 while blocking the interference light signal. The light blocking structure 170 can be foam, which is in a compressed state and can play a supporting role.

In other embodiments, the light source 160 may also be disposed outside the cylindrical hollow structure of the support member 150. At this time, the support member 150 is used to block the emitted light signal and/or non-finger reflected light signal from the light source 160 from directly entering the fingerprint The sensor 130 interferes with fingerprint detection.

FIG. 6 shows another schematic structural diagram of the optical fingerprint detection apparatus 100 in this embodiment. The optical fingerprint detection device 100 shown in FIG. 6 can be a schematic cross-sectional structure diagram along the plane of the YZ axis in FIG. 1 . The above-mentioned FIG. 3 and this FIG. 6 may be a schematic cross-sectional view of another optical fingerprint detection device 100 along a plane where the XZ axis is located and a schematic cross-sectional view along the plane where the YZ axis is located.

Optionally, in this 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 (Light Emitting Diode, LED), which are distributed around the fingerprint sensor 130 .

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

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

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

In addition, the light source 160 may be disposed at any position between the support member 150 and the edge of the first substrate 140 in addition to the position shown in (a) or (b) of FIG. 7 , as shown in FIG. 7 Any position between the two dashed boxes shown in (c) in the figure.

In the embodiment of the present application, the light source 160 and the fingerprint sensor 130 are both arranged on the same first substrate 140, which facilitates the installation of the light source 160, and does not need to provide additional electrical connectors for the light source 160. Common control of the light source 160 and the fingerprint sensor 130 .

Optionally, the light source 160 may be disposed in various positions in the following embodiments in addition to the positions shown in the embodiments shown in FIG. 4 to FIG. 7 above.

FIG. 8 and FIG. 9 show two other schematic structural diagrams of the optical fingerprint detection device 100 . The optical fingerprint detection device 100 shown in FIG. 8 and FIG. 9 may be a schematic cross-sectional structure diagram along the plane of the YZ axis in FIG. 1 .

As shown in FIGS. 8 and 9 , in the embodiment of the present application, the light source 160 is not disposed in the first accommodating area 2021 of the outer frame 201 of the electronic device, but is disposed in the second accommodating area in the outer frame 201 of the electronic device In 2022, other components in the optical fingerprint detection device 100, including the cover plate 110, the optical assembly 120, the fingerprint sensor 120, and the support member 150, are all disposed in the first accommodating area 201.

In the case where the first accommodating area 2021 that can be provided in the electronic device has a small space, the embodiment shown in FIG. 8 or FIG. 9 can be used, and the light source 160 is arranged in the second accommodating area 2022, which can be flexibly adapted. Match the needs of different electronic devices. Optionally, the second accommodating area 2022 can also be a groove, a through hole or other types of accommodating spaces.

Optionally, in the embodiment shown in FIG. 8 , the light source 160 may be disposed above the first substrate 140 , and the first substrate 140 may be disposed below the first accommodating area 2021 and the second accommodating area 2022 . In the embodiment shown in FIG. 8 , although the light source 160 and other components in the optical fingerprint detection device 100 are not arranged in the same accommodating area, they are all arranged above the first substrate 140 to facilitate the installation of the light source 160 without any The light source 160 is provided with additional electrical connectors, which facilitates the common control of the light source 160 and the fingerprint sensor 130 while reducing costs.

In the embodiment shown in FIG. 9 , the optical fingerprint detection device 100 further includes: a second substrate 161 , the second substrate 161 is disposed below the light source 160 , and the second substrate 161 and the first substrate 140 can be disposed on the same plane On or close to the same plane, for transmitting control signals 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 under the second substrate. The reinforcing plate 162 and the second substrate 161 are used to jointly support the light source 160. Optionally, in the embodiment shown in FIG. 9 , one end of the second substrate 161 is used to connect to the light source 160 , and the other end of the second substrate 161 can be used to connect to other electrical modules of the electronic device to provide power and control signals to the light source 160 .

In the embodiment shown in FIG. 9 , the second substrate 161 and the light source 160 are provided independently from other components of the optical fingerprint detection device 100 . It is convenient to disassemble and maintain the light source 160 .

It should be noted that the schematic structural diagrams of the optical fingerprint detection device 100 shown in FIG. 7 to FIG. 9 above are only to illustrate the position design of the light source 160 . , the relevant technical solutions of the fingerprint sensor 130 , the first substrate 140 , the support member 150 and the carrier board 211 may refer to the relevant descriptions in FIGS. 2 to 7 above, and will not be repeated here.

It should also be noted that the positions of the light sources 160 shown in FIG. 4 to FIG. 9 above are only schematic descriptions. In addition to the positions shown in the above-mentioned embodiments, the light sources 160 may also be arranged in electronic devices. In other positions, the optical element can then guide the light signal emitted by the light source 160 to the finger position above the cover plate 110 . The specific position of the light source 160 is not limited in this embodiment of the present application.

In the above embodiment, the optical component 120 and the fingerprint sensor 130 are disposed on the surface of the first substrate 140, and no light-shielding structure is provided around the optical component 120 and the fingerprint sensor 130, so they can receive more interfering light signals, which has a certain effect on fingerprint recognition. interference. In order to further improve the performance of the optical fingerprint detection device 100 , on the basis of the above embodiments, FIG. 10 and FIG. 11 show two other structural schematic diagrams of the optical fingerprint detection device 100 , and the two structural schematic diagrams can be respectively shown along the lines of FIG. 1 is a schematic diagram of the cross-sectional structure of the plane where the XZ axis is located and the plane where the YZ axis is located.

Optionally, as shown in FIG. 10 and FIG. 11 , the optical fingerprint detection device 100 may further include:

The light shielding layer 180 has a first window 1801 formed therein. The first window 1801 is located above the fingerprint sensor 130 for passing the fingerprint light signal to be received by the fingerprint sensor 130 . Specifically, the light shielding layer 180 can be used to shield stray light signals from entering the fingerprint sensor 130, thereby reducing the interference of environmental factors on the fingerprint identification process.

In some embodiments of the present application, the light shielding layer 180 may be a shielding glue layer. 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 a range of other preset values, which is not specifically limited in this application.

Of course, in other alternative embodiments, the light shielding layer 180 may also be replaced by a filter. Among them, the filter is used to reduce undesired ambient light in fingerprint sensing to improve the optical sensing of the received light by the fingerprint sensor 130 . The filter can specifically be used to filter out light of a specific wavelength, for example, near-infrared light and part of red light. For example, human fingers absorb most of the energy of light with wavelengths below 580 nm, based on this, filters can be designed to filter light with wavelengths from 580 nm to the infrared to reduce the effect of ambient light on optical detection in fingerprint sensing.

Optionally, in some embodiments, at least a part of the above-mentioned optical assembly 120 is located in the first window 1801 .

For example, as shown in FIG. 10 and FIG. 11 , the microlens array 121 in the optical component 120 is located in the above-mentioned first opening 1801 , and at least one diaphragm layer in the optical component 120 is integrated into the fingerprint sensor chip together with the fingerprint sensor 130 , the surrounding area of the first window 1801 in the light shielding layer 180 is disposed on the surface of the edge area of the fingerprint sensor chip.

Optionally, as shown in FIGS. 10 and 11 , the optical fingerprint detection device 100 may further include: a support layer 190 disposed between the first substrate 140 and the light shielding layer 180 for supporting the light shielding layer 180 .

In the embodiment of the present application, the support layer 190 is provided with a third opening 1901 , and the fingerprint sensor 130 is arranged in the third opening 1901 .

Specifically, the light shielding layer 180 is disposed on the surface of the support 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 support layer 190 supports a part of the light shielding layer 180 , and another part of the light shielding layer 180 is suspended below or supported by the fingerprint sensor 130 .

Optionally, the upper surface of the support 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 support layer 190 in the Z direction is not higher than the optical assembly 120 in the Z direction the highest point on.

Further, as shown in FIG. 10 and FIG. 11 , at least one diaphragm layer in the optical assembly 120 is integrated with the fingerprint sensor 130 in the fingerprint sensor chip, and the upper surface of the support layer 190 is not higher than the upper surface of the fingerprint sensor chip. , in other words, the highest point of the support 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 on the surface of the first substrate 140 by a fixing glue. For example, the material of the support layer 190 includes, but is not limited to, metal, resin, glass fiber composite board, adhesive layer, and the like. For example, the support layer 190 is a polyethylene terephthalate (polyethylene terephthalate, PET) material layer or a polyimide (polyimide, PI) material layer. For another example, the support layer 190 may also be a bracket formed of a foam material. Optionally, the fixing adhesive can be a double-sided adhesive.

According to the solution of the embodiment of the present application, the setting of the support layer 190 will not 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.

Continue to refer to FIG. 10 and FIG. 11 , in order to improve the reliability and stability of the cover plate 110 , optionally, a foam 112 is provided below the cover plate 110 , and the foam can 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 columnar structure of the support member 150 to support the cover plate 110 . Optionally, in some embodiments, the foam 112 can be disposed around the optical component 110 and the fingerprint sensor 120 , specifically, can be disposed around the above-mentioned supporting layer 190 for connecting the first substrate 140 and the cover plate 110 .

Preferably, in other embodiments, as shown in FIG. 10 and FIG. 11 , the foam 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 , the foam layer 112 While playing the role of supporting the cover plate 110, it can further play the role of blocking stray light. Optionally, the foam layer 112 may be connected between the light shielding layer 180 and the cover plate 110 by a tape.

Optionally, as shown in FIGS. 10 and 11 , the foam layer 112 may be provided with a fourth window 1121 penetrating the foam layer 112 . Optionally, the fourth window 1121 is disposed above the optical assembly 120 , specifically, disposed above the microlens array 121 , so as to be received by the optical assembly 120 and the fingerprint sensor 130 through fingerprint light signals. 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, referring to FIG. 11 , the fingerprint sensor 130 is connected to the first substrate 140 through the first lead 131 , and the first lead is disposed on one side of the fingerprint sensor 130 . The support layer 190 is disposed on one side of the first lead 131 and the lead protection glue 132 , and the light shielding layer 180 can directly cover the lead protection glue 132 .

Optionally, the light shielding layer 180 may further be provided with a second opening 1802 , wherein the top area of the first lead 131 and the lead protective adhesive 132 is located in the second opening 1802 .

It should be noted that, as shown in FIG. 11 , a partial light shielding layer 180 is also disposed between the first lead 131 of the fingerprint sensor 130 and the microlens array 121 , and the partial light shielding layer 180 is located at the first opening 1801 and the third opening. between windows 1802. The part of the light shielding layer 180 can not only block stray light, but also block the lead protective adhesive 132 from spreading to the microlens array 121 , so as to prevent the light condensing effect of the microlens array 121 from being affected.

It can be understood that, in the embodiments shown in FIGS. 10 to 11 , the light source 160 is arranged in the hollow cylindrical structure of the support member 150 , and the foam 112 and the light shielding layer between the light source 160 and the optical component 120 and the fingerprint sensor 130 are 180 and the supporting layer 190 are multiplexed into the light blocking structure 170 in FIG. 4 above.

It can also be understood that, in the embodiments shown in FIGS. 10 and 11 , the arrangement of the light source 160 may also adopt any of the above embodiments in FIGS. 6 to 9 , and the relevant design of the light source 160 can be referred to above. Relevant descriptions are not repeated here.

The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the present application is not limited to the specific details of the above-mentioned embodiments. Within the scope of the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application. These simple modifications all belong to the protection scope of the present application.

For example, the specific technical features described in the above-mentioned specific embodiments can be combined in any suitable manner unless they are inconsistent. In order to avoid unnecessary repetition, this application does not describe any possible combination. State otherwise.

For another example, the various embodiments of the present application can also be combined arbitrarily, as long as they do not violate the idea of the present application, they should also be regarded as the content disclosed in the present application.

The embodiment of the present application also provides an electronic device, and the electronic device may include:

An accommodating area arranged on the side of the electronic device;

a carrier plate disposed at the accommodation area; and

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

The accommodating area may be the accommodating area 202 in the above-mentioned embodiments of the application, including: the first accommodating area 20211 and/or the second accommodating area 2022, and the carrier may be the carrier 221 in the above-mentioned embodiments of the application, The optical fingerprint detection device may be the optical fingerprint detection device 100 in any of the above application embodiments.

In the embodiment of the present application, the optical fingerprint detection apparatus 100 is fixed on the carrier board 221 to be disposed on the side of the electronic device.

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

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

It should be understood that the specific examples in the embodiments of the present application are only for helping those skilled in the art to better understand the embodiments of the present application, rather than limiting the scope of the embodiments of the present application.

It should be understood that the terms used in the embodiments of the present application and the appended claims are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. For example, as used in the embodiments of this application and the appended claims, the singular forms "a," "above," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise.

Those of ordinary skill in the art can realize that the units of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two, in order to clearly illustrate the interchangeability of hardware and software In the above description, the components and steps of each example have been generally described in terms of function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

In the several embodiments provided in this application, it should be understood that the disclosed systems and apparatuses may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solutions of the embodiments of the present application.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application are essentially or part of contributions to the prior art, or all or part of the technical solutions can be embodied in the form of software products, and the computer software products are stored in a storage medium , including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalents within the technical scope disclosed in the present application. Modifications or substitutions shall be covered by the protection scope of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

An optical fingerprint detection device, characterized in that it is used to be arranged in an accommodating area on the side of an electronic device, the optical fingerprint detection device comprising:

cover plate;

an optical assembly and a fingerprint sensor, wherein the optical assembly is connected to the fingerprint sensor and is arranged in a first direction of the cover plate in sequence, and the first direction faces the inner side of the side surface of the electronic device;

a first substrate, arranged in the first direction of the fingerprint sensor and used for supporting the fingerprint sensor and the optical assembly, the first substrate is used for being fixed to the carrier board at the accommodating area, so that The first substrate is arranged in a second direction of the carrier board, and the second direction faces the outer side of the side surface of the electronic device;

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

The light source is used for emitting light signals to the finger at the cover plate, the light signal is reflected or transmitted by the finger to form a fingerprint light signal carrying fingerprint information, and the optical component is used for converting the fingerprint light signal Navigate to the fingerprint sensor for fingerprint detection.
The optical fingerprint detection device according to claim 1, wherein the cover plate is an arc surface cover plate, and the arc surface of the arc surface cover plate protrudes toward the outer side of the side surface of the electronic device.
The optical fingerprint detection device according to claim 1 or 2, wherein the cover plate comprises a first surface and a second surface, the first surface is an arc surface, and the first surface faces the electronic device The outer side of the side surface is convex, and the second surface is a plane;

The cover plate is used for condensing the fingerprint light signal to the optical component.
The optical fingerprint detection device according to any one of claims 1 to 3, wherein the support member is a hollow cylindrical structure, and the optical component and the fingerprint sensor are arranged in the hollow cylindrical structure;

The surrounding edges of the cover plate are fixed to the hollow cylindrical structure through an adhesive layer, so that the cover plate is arranged in the second direction of the optical component and the fingerprint sensor.
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: a light blocking structure arranged between the optical component and the fingerprint sensor and the light source.
The optical fingerprint detection device according to any one of claims 1 to 5, wherein the optical fingerprint detection device comprises one of the optical components and one of the fingerprint sensors;

The length of the optical component along the long-side direction of the side of the electronic device is greater than the length of the optical component along the short-side direction of the side surface of the electronic device; and,

The length of the fingerprint sensor along the long-side direction of the side surface of the electronic device is greater than the length of the fingerprint sensor along the short-side direction of the side surface of the electronic device.
The optical fingerprint detection device according to any one of claims 1 to 5, wherein the optical fingerprint detection device comprises a plurality of the optical components and a plurality of the fingerprint sensors, and the plurality of the optical components are connected with the A plurality of the fingerprint sensors are in one-to-one correspondence;

A plurality of the optical assemblies and the plurality of the fingerprint sensors are arranged along the long sides of the side surfaces of the electronic device.
The optical fingerprint detection device according to any one of claims 1 to 7, wherein the light source is disposed in the second direction of the first substrate and connected to the first substrate.
The optical fingerprint detection device according to any one of claims 1 to 7, wherein the optical fingerprint detection device further comprises a second substrate, and the light source is disposed in the first direction of the second substrate , and connected to the second substrate.
The optical fingerprint detection device according to claim 8 or 9, wherein the cover plate, the optical assembly, the fingerprint sensor and the support member are arranged in a first accommodation on a side of the electronic device area, the light source is arranged in a second accommodating area on the side of the electronic device, and the first accommodating area and the second accommodating area are arranged adjacent to each other.
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 all disposed on the side of the electronic device in the first accommodating area.
The optical fingerprint detection device according to any one of claims 1 to 11, wherein the optical component comprises:

microlens array;

At least one diaphragm layer is disposed below the microlens array, and each diaphragm layer in the at least one diaphragm layer is formed with a plurality of light-passing small holes;

The microlens array is used for converging the fingerprint optical signal into a plurality of light-passing holes of the at least one aperture layer, and the fingerprint light signal is transmitted to the fingerprint through the plurality of light-passing holes sensor for fingerprint detection.
The optical fingerprint detection device according to claim 12, wherein each microlens in the microlens array corresponds to at least one light-passing hole in each diaphragm layer, and each microlens in the fingerprint sensor corresponds to at least one pixel unit;

The fingerprint sensor is used for receiving fingerprint light signals in at least one direction to acquire at least one fingerprint image for fingerprint detection.
The optical fingerprint detection device according to any one of claims 1 to 13, wherein the optical fingerprint detection device further comprises:

a light-shielding layer, wherein a first window is formed, the first window is arranged in the second direction of the fingerprint sensor, and the first window is used for passing the fingerprint light signal to be detected by the fingerprint sensor take over.
The optical fingerprint detection device according to claim 14, wherein the optical component is located in the first window.
The optical fingerprint detection device according to claim 14 or 15, wherein a second window is further formed in the light shielding layer, and the top area of the first lead of the fingerprint sensor connected to the first substrate is located at the in the second window.
The optical fingerprint detection device according to claim 16, wherein the first lead is covered with lead protection glue, and in the second direction, the top region of the lead protection glue is located at the second opening. window, and the height of the lead protection glue is less than 150 μm.
The optical fingerprint detection device according to any one of claims 14 to 17, wherein the optical fingerprint detection device further comprises:

a support layer, disposed between the first substrate and the light shielding layer, for supporting the light shielding layer;

The support layer is provided with a third window, the fingerprint sensor is arranged in the third window, and in the second direction, the highest point of the support layer is not higher than the optical component. highest point.
The optical fingerprint detection device according to any one of claims 14 to 18, wherein the optical fingerprint detection device further comprises:

The foam layer is arranged in the second direction of the light-shielding layer, and a fourth window is formed in the foam layer, and the fourth window is arranged on the optical assembly and the fingerprint sensor. In the second direction, the fourth window is used to pass the fingerprint light signal to be received by the optical component and the fingerprint sensor, and the area of the fourth window is not smaller than the first window in the light shielding layer. window area.
The optical fingerprint detection device according to claim 19, wherein the foam layer is used for connecting the cover plate and the light shielding layer to support the cover plate.
The optical fingerprint detection device according to any one of claims 1 to 20, wherein 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 Pass the optical signal of the target band and filter the optical signal of the non-target band.
The optical fingerprint detection device according to any one of claims 1 to 21, characterized in that, the optical fingerprint detection device further comprises: a filter layer disposed in the optical path between the cover plate and the fingerprint sensor , which is used to pass the optical signal of the target band and filter the optical signal of the non-target band.
The optical fingerprint detection device according to claim 21 or 22, wherein the light source is used for emitting an optical signal in an infrared waveband, and the target waveband includes an infrared waveband.
The optical fingerprint detection device according to any one of claims 1 to 23, wherein a key is provided in the accommodating area, and the optical fingerprint detection device is disposed in the key.
The optical fingerprint detection device according to claim 24, wherein the key is only used to realize a fingerprint detection function, or,

The key is used to realize the fingerprint detection function and the target function of the electronic device.
An electronic device, comprising:

an accommodating area arranged on the side of the electronic device;

a carrier plate disposed at the accommodating area; and

The optical fingerprint detection device according to any one of the above claims 1 to 25, wherein the optical fingerprint detection device is fixed to the carrier board.
The electronic device according to claim 26, wherein the carrier board is disposed in the accommodating area, or,

The carrier board is disposed in a first direction of the accommodating area, wherein the first direction faces the inner side of the side surface of the electronic device.
The electronic device according to claim 26 or 27, wherein the carrier board is a mechanical structural member or an electrical structural member in the electronic device.