CN216014312U - Optical fingerprint identification device and electronic equipment - Google Patents

Abstract

An optical fingerprint recognition device and an electronic apparatus, the optical fingerprint recognition device has a large fingerprint detection area, and has a low cost and a small installation space. The optical fingerprint recognition device includes: the first optical fingerprint identification module comprises an optical lens and a first fingerprint sensor, wherein the optical lens is used for reducing and imaging a first fingerprint in a first fingerprint detection area in the display screen to detect the first fingerprint; second optics fingerprint identification module, including the microlens layer, an at least diaphragm layer and second fingerprint sensor, an at least diaphragm layer sets up between microlens layer and second fingerprint sensor, and each diaphragm layer all is provided with a plurality of logical unthreaded holes in an at least diaphragm layer, and the second finger fingerprint reflection or the scattering of second fingerprint detection area in the display screen is pressed to the process, and the fingerprint light signal after the convergence through the microlens layer conducts to second fingerprint sensor through a plurality of logical unthreaded holes to detect the second finger fingerprint.

Description

Optical fingerprint identification device and electronic equipment

Technical Field

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

Background

With the development of the biometric identification technology, the optical fingerprint identification technology is widely applied to the fields of mobile terminal design, automobile electronics, smart home and the like based on unique advantages of the technology. In the field of mobile terminals, for example, in mobile phones, the performance requirements of fingerprint identification technology are higher and higher, on one hand, the optical fingerprint identification device needs higher performance, for example, has a larger field of view to have a larger fingerprint detection area, and is convenient for users to use; on the other hand, the optical fingerprint recognition device also needs to have the characteristics of low manufacturing cost, miniaturization, lightness, thinness and the like, is suitable for being installed in a miniaturized handheld terminal, and is convenient for the processing and popularization of the optical fingerprint recognition device.

Therefore, how to achieve a larger fingerprint detection area of the optical fingerprint identification device and reduce the occupied space of the optical fingerprint identification device in the electronic device and the cost of the optical fingerprint identification device are both important technical problems to be solved.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an optical fingerprint identification device and electronic equipment, when realizing that optical fingerprint identification device has great fingerprint detection area, compromise and reduce the required space that occupies of optical fingerprint identification device in electronic equipment to and optical fingerprint identification device's cost.

In a first aspect, an optical fingerprint recognition device is provided, which is configured to be disposed below a display screen of an electronic device, and includes: the first optical fingerprint identification module comprises an optical lens and a first fingerprint sensor, wherein the first fingerprint sensor is arranged below the optical lens, the optical lens is used for reducing and imaging a first fingerprint in a first fingerprint detection area in a display screen to the first fingerprint sensor, and the first fingerprint sensor is used for receiving the reduced image of the first fingerprint so as to detect the first fingerprint; second optics fingerprint identification module, with the adjacent setting of first optics fingerprint identification module, this second optics fingerprint identification module includes the microlens layer, an at least diaphragm layer and second fingerprint sensor, wherein, the microlens layer includes a plurality of microlenses, an at least diaphragm layer sets up between microlens layer and second fingerprint sensor, each diaphragm layer all is provided with a plurality of logical unthreaded holes in an at least diaphragm layer, through pressing down the second finger fingerprint reflection or the scattering of second fingerprint detection area in the display screen, and the fingerprint light signal after converging through the microlens layer conducts to second fingerprint sensor through a plurality of logical unthreaded holes, with detect the second finger fingerprint.

Through the technical scheme of this embodiment, be provided with the first optics fingerprint identification module and the second optics fingerprint identification module of two different grade types simultaneously among the optics fingerprint identification device, this first optics fingerprint identification module and the adjacent setting of second optics fingerprint identification module to make the first fingerprint detection area of first optics fingerprint identification module and the adjacent setting of second fingerprint detection area of second optics fingerprint identification module, improve the holistic fingerprint detection area of optics fingerprint identification device. Through this embodiment, not only can make things convenient for pressing of user's finger, can also improve the single under pressing of user's finger, the regional area of fingerprint that optical fingerprint identification device can detect to improve optical fingerprint identification device's detection performance.

Wherein, first optics fingerprint identification module utilizes optical lens imaging principle to form images, can reduce the formation of image in first fingerprint sensor with user's fingerprint in first fingerprint detection area, therefore, compare in first fingerprint detection area, this first fingerprint sensor's area is less, reduces the manufacturing cost of this first fingerprint sensor and the first optics fingerprint identification module in place. In addition, the second optical fingerprint identification module utilizes the microlens layer and the at least one diaphragm layer to image, the overall thickness of the microlens layer and the at least one diaphragm layer is small, and the space under the screen occupied by the second optical fingerprint identification module can be reduced.

To sum up, through the technical scheme of this application embodiment, can combine first optics discernment fingerprint module and second optics fingerprint identification module advantage separately between them, on optics fingerprint identification device has great fingerprint detection area's basis, balanced manufacturing cost and space for it is suitable for and sets up also can not cause manufacturing cost too high in the compact space of display screen, is favorable to optics fingerprint identification device's application popularization and development.

In some possible embodiments, the first optical fingerprint identification module and the second optical fingerprint identification module are both disposed on a middle frame of the electronic device; the middle frame is provided with an opening, and at least part of the first optical fingerprint identification module is positioned in the opening; the second optical fingerprint identification module is located the surface of center towards the display screen.

In some possible embodiments, a surface of the middle frame facing the display screen is provided with a groove, and the second optical fingerprint identification module is located in the groove.

In some possible embodiments, the first optical fingerprint identification module is located on one side of a battery of the electronic device in a direction parallel to the display screen; in the direction of perpendicular to display screen, second optics fingerprint identification module is located the battery towards one side of display screen.

In some possible embodiments, the first optical fingerprint identification module is located on one side of the battery facing the bottom area of the display screen, and the second optical fingerprint identification module is arranged on one side of the first optical fingerprint identification module facing the top area of the display screen.

In some possible embodiments, the first optical fingerprint identification module and the second optical fingerprint identification module are correspondingly disposed below the middle region or the middle-lower region of the display screen.

In some possible embodiments, the first fingerprint detection area of the first optical fingerprint identification module and the second fingerprint detection area of the second optical fingerprint identification module are connected to each other.

In some possible embodiments, the first edge of the first fingerprint detection area is adjacent to the first edge of the second optical fingerprint identification module; the distance between the center of the first fingerprint detection area and the center of the second fingerprint detection area is (W)₁+W₂) 2-1mm to (W)₁+W₂) A/2 +2mm, wherein W₁Is the length of a second edge of the first fingerprint detection area perpendicular to its first edge, W₂Is a secondThe length of a second side of the fingerprint detection area perpendicular to its first side.

In some possible embodiments, the distance between the center of the first fingerprint detection area and the center of the second fingerprint detection area is at (W)₁+W₂) 2-0.5mm to (W)₁+W₂) And/2 +0.5 mm.

In some possible embodiments, the first direction of the first fingerprint sensor has a first angle with the first direction of the display screen, wherein the first direction of the display screen is a direction parallel to a first edge of the display screen, the first direction of the first fingerprint sensor is a direction parallel to the first edge of the first fingerprint sensor, and the first angle is between 3 degrees and 17 degrees, or the first angle is between-3 degrees and-17 degrees.

In some possible embodiments, the first direction of the second fingerprint sensor has a second angle with the first direction of the display screen, wherein the first direction of the display screen is parallel to the first side of the display screen, the first direction of the second fingerprint sensor is parallel to the first side of the second fingerprint sensor, the second angle is between-15 degrees and 15 degrees, and the second angle is not equal to 0 degree.

In some possible embodiments, the optical fingerprint recognition device includes: at least one first optics fingerprint identification module and at least one second optics fingerprint identification module.

In some possible embodiments, the optical fingerprint recognition device includes: two first optics fingerprint identification modules and at least one second optics fingerprint identification module, two first fingerprint detection area mutual noninterference and interconnect of two first optics fingerprint identification modules, at least one second fingerprint detection area of at least one second optics fingerprint identification module connects in the region that two first fingerprint detection area formed.

In some possible embodiments, the optical fingerprint recognition device includes: two second optics fingerprint identification modules and at least one first optics fingerprint identification module, the distance between two second fingerprint detection area of two second optics fingerprint identification modules is within 1mm, and at least one first fingerprint detection area of at least one first optics fingerprint identification module connects in the region that two second fingerprint detection area formed.

In some possible embodiments, the optical fingerprint recognition device includes: two second optics fingerprint identification modules and a first optics fingerprint identification module, two second fingerprint detection area's of two second optics fingerprint identification modules central distance is between 20mm to 30mm, and the first fingerprint detection area of a first optics fingerprint identification module is located between two second fingerprint detection area.

In some possible embodiments, the center of the first fingerprint detection area of one first optical fingerprint identification module is located on a first straight line, and the first straight line is a central axis of a central line connecting the centers of the two second fingerprint detection areas.

In some possible embodiments, the optical fingerprint recognition device includes: three second optics fingerprint identification module and a first optics fingerprint identification module, in three second optics fingerprint identification module, two second optics fingerprint detection area's of two second optics fingerprint identification modules central distance is between 20mm to 30mm, and a second fingerprint detection area of another second optics fingerprint identification module and a first fingerprint detection area of first optics fingerprint identification module are located between two second fingerprint detection areas.

In some possible embodiments, the optical fingerprint recognition device further includes: and the repeater comprises a plurality of input interfaces and an output interface, the input interfaces are used for respectively receiving the electric signals of the first fingerprint sensor and the second fingerprint sensor, and the output interface is used for transmitting the electric signals of the first fingerprint sensor and the second fingerprint sensor to the processing unit of the electronic device.

In some possible embodiments, the first optical fingerprint recognition module further includes: the first flexible circuit board is connected with the first fingerprint sensor and one input interface of the repeater and is used for transmitting the electric signal of the first fingerprint sensor; first optics fingerprint identification module still includes: and the second flexible circuit board is connected to the second fingerprint sensor and the other input interface of the repeater and is used for transmitting the electric signal of the second fingerprint sensor.

In some possible embodiments, the optical fingerprint recognition device includes: two first optical fingerprint identification modules, two first fingerprint sensor in two first optical fingerprint identification modules set up in same flexible circuit board.

In some possible embodiments, the area of the first fingerprint detection area is equal to or larger than 36mm²(ii) a And/or the area of the second fingerprint detection area is 20mm²To 40mm²In the meantime.

In some possible embodiments, in the first optical fingerprint recognition module, the optical lens includes a plurality of optical lenses, and the first optical fingerprint recognition module further includes: the fingerprint sensor comprises a lens barrel and a support, wherein the lens barrel is used for accommodating a plurality of optical lenses, and the support is used for fixing the lens barrel and the first fingerprint sensor.

In some possible embodiments, in the second optical fingerprint identification module, the second fingerprint sensor includes an array of photosensitive cells, and each microlens in the microlens layer corresponds to a plurality of photosensitive cells in the array of photosensitive cells; at least one diaphragm layer is formed between each micro lens and the corresponding multiple photosensitive units, multiple light guide channels in different directions are formed, and the bottom of each light guide channel in the multiple light guide channels is correspondingly provided with one photosensitive unit; and in the fingerprint optical signals after being reflected or scattered by the second finger fingerprint and converged by the micro lens, a plurality of target fingerprint optical signals in different directions are transmitted to the plurality of photosensitive units through a plurality of light guide channels in a one-to-one correspondence manner, and the plurality of target fingerprint optical signals are used for detecting the second finger fingerprint.

In a second aspect, an electronic device is provided, comprising: the optical fingerprint identification device comprises a display screen and the optical fingerprint identification device in the first aspect or any one of the possible embodiments of the first aspect, wherein the optical fingerprint identification device is arranged below the display screen to realize the fingerprint identification under the screen.

Drawings

Fig. 1 is a schematic top view of an electronic device to which embodiments of the present application may be applied.

Fig. 2 is a schematic cross-sectional view of a-a' cross-section of the electronic device shown in fig. 1.

Fig. 3 is a schematic structural diagram of an optical fingerprint identification device according to an embodiment of the present disclosure.

Fig. 4 is a schematic structural diagram of another optical fingerprint identification device according to an embodiment of the present disclosure.

Fig. 5 is a schematic structural diagram of another optical fingerprint identification device provided in an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a first optical fingerprint identification module according to an embodiment of the present disclosure.

Fig. 7 is a schematic structural diagram of two second optical fingerprint identification modules according to an embodiment of the present application.

Fig. 8 is a schematic structural diagram of another optical fingerprint identification device provided in an embodiment of the present application.

Fig. 9 is a schematic structural diagram of another optical fingerprint identification device provided in an embodiment of the present application.

Fig. 10 is a schematic top view of an optical fingerprint identification device provided in an embodiment of the present application, below a display screen.

Fig. 11 is a schematic top view and an enlarged schematic diagram of a first fingerprint sensor and a second fingerprint sensor under a display screen according to an embodiment of the present application.

Fig. 12 is a schematic diagram of a first fingerprint detection area and a second fingerprint detection area according to an embodiment of the present application.

Fig. 13 is a schematic diagram of a finger fingerprint covering a first fingerprint detection area and a second fingerprint detection area according to an embodiment of the present application.

Fig. 14 is a schematic diagram of another first fingerprint detection area and a second fingerprint detection area according to an embodiment of the present application.

FIG. 15 is a schematic diagram of another finger print covering a first fingerprint detection area and a second fingerprint detection area according to an embodiment of the present application.

Fig. 16 is a schematic diagram of another first fingerprint detection area and a second fingerprint detection area according to an embodiment of the present application.

Fig. 17 is a schematic diagram of another first fingerprint detection area and a second fingerprint detection area according to an embodiment of the present application.

Fig. 18 is a schematic diagram of another first fingerprint detection area and a second fingerprint detection area according to an embodiment of the present application.

Fig. 19 is two schematic diagrams illustrating a user's finger pressing the first fingerprint detection area and the second fingerprint detection area shown in fig. 18 according to the embodiment of the present application.

Fig. 20 is a schematic diagram of another first fingerprint detection area and a second fingerprint detection area according to an embodiment of the present application.

Fig. 21 is a schematic diagram of another first fingerprint detection area and a second fingerprint detection area according to an embodiment of the present application.

Fig. 22 is a schematic structural block diagram of an optical fingerprint identification device according to an embodiment of the present application.

Fig. 23 is a schematic block diagram of another optical fingerprint identification device provided in 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.

The technical scheme of the embodiment of the application can be applied to various electronic devices, and is particularly suitable for computers (computers) and peripheral 3C electronic products related to the computers, communication (Communications) and Consumer Electronics (Consumer Electronics), such as smart phones, notebook computers, tablet computers, intelligent wearable devices, household appliances, game devices and the like. In addition, the technical solutions related to the embodiments of the present application also relate to other types of electronic devices such as automotive electronics, and the embodiments of the present application are not particularly limited to this.

The technical scheme of the embodiment of the application can be used for the technology of fingerprint identification under the screen.

The Under-screen (Under Display) fingerprint identification technology is that a fingerprint identification device is installed below a Display screen of an electronic device, so that fingerprint identification operation is performed in a Display area of the Display screen, and a fingerprint acquisition area does not need to be arranged in an area, except the Display area, of the front face of the electronic device.

In particular, the fingerprint recognition device may be an optical fingerprint recognition device that may use light returning from a top surface of a display screen of the electronic device for fingerprint sensing and other sensing operations. This returned light carries information about an object (e.g., a finger) in contact with or in proximity to the top surface of the display screen, and the fingerprint recognition device located below the display screen collects and detects this returned light to perform underscreen fingerprint recognition. Among other things, the fingerprint recognition device may be designed to achieve a desired optical imaging by appropriately configuring optical elements for collecting and detecting the returned light, thereby detecting fingerprint information of the finger.

Fig. 1 and fig. 2 show schematic diagrams of an electronic device 10 to which embodiments of the present application may be applied, where fig. 1 is a schematic top view of the electronic device 10, and fig. 2 is a schematic cross-sectional diagram of a-a' cross section of the electronic arrangement shown in fig. 1. Alternatively, the electronic device 10 may be a mobile phone.

As shown in fig. 1 and 2, the electronic device 10 may include a display screen 120 and an optical fingerprinting device 130.

The display screen 120 may be a self-Emitting display screen, for example, an Organic Light-Emitting Diode (OLED) display screen or a Micro-LED (Micro-LED) display screen. In other alternative embodiments, the Display 120 may also be a Liquid Crystal Display (LCD) or other passive light emitting Display, which is not limited in this embodiment of the present application.

The optical fingerprint recognition device 130 includes a fingerprint sensor 134, and the fingerprint sensor 134 includes an Active Array (AA) area 133, or also called an Active photo-sensing area 133, for sensing a light signal. In a specific implementation, the effective photosensitive area 133 may be a photosensitive cell array (also referred to as a photosensitive pixel array, an optical sensing array, etc.) having a plurality of photosensitive cells (also referred to as pixel cells, optical sensing cells, etc.). In particular, the light sensing unit may include a photodetector (Photo detector), such as a photodiode, and the like, and the light sensing unit array may be a photodetector array including a plurality of photodetectors distributed in an array.

The sensing area of the effective photosensitive area 133 of the fingerprint sensor 134 on the display screen 120 is the fingerprint detection area 103 (also referred to as fingerprint collection area, fingerprint identification area, etc.) of the optical fingerprint identification device 130. In practical application, the finger 140 of the user may be disposed in the fingerprint detection area 103, and after the optical signal of the light source passes through the finger 140, the optical signal carrying the fingerprint information is received by the effective photosensitive area 133, so as to realize fingerprint identification.

Specifically, the fingerprint sensor 134 may further include a reading circuit, a processing circuit, an auxiliary circuit, and the like electrically connected to the effective photosensitive area 133 in addition to the effective photosensitive area 133, for example, in the embodiment shown in fig. 2, the effective photosensitive area 133 and other circuits may be fabricated on a chip (Die) through a semiconductor process, and the fingerprint sensor 134 may also be referred to as a fingerprint sensor chip. In another example, the fingerprint sensor 134 may include only the active photosensitive area 133 and a portion of the auxiliary circuitry integrated in one fingerprint sensor chip, while the processing circuitry may be integrated in another chip (which may be referred to as a processing chip) that is electrically connected to the fingerprint sensor chip to enable signal transmission. Optionally, the processing chip includes, but is not limited to, a Micro Controller Unit (MCU) chip.

As shown in fig. 1, the optical fingerprint recognition device 130 may be disposed at a partial region under the display screen 120. Alternatively, the fingerprint detection area 103 may be located in the display area of the display screen 120, and the optical fingerprint identification device 130 may be correspondingly disposed below the fingerprint detection area 103.

As shown in fig. 2, taking the display screen 120 as an OLED display screen as an example, the optical fingerprint identification device 130 may use a display unit (i.e., an OLED light source) of the OLED display screen 120 located in the fingerprint detection area 103 as an excitation light source for optical fingerprint detection. When the finger 140 is pressed against the fingerprint detection area 103, the display 120 emits a beam of light 111 to the finger 140 above the fingerprint detection area 103, and the light 111 is reflected on the surface of the finger 140 to form reflected light or scattered light (transmitted light) is formed by scattering inside the finger 140. In the present application, the above-described reflected light and scattered light are collectively referred to as reflected light for convenience of description. Since the ridges (ridges) and valleys (valley) of the fingerprint have different light reflection capabilities, the reflected light from the ridges and valleys of the fingerprint have different light intensities, and the reflected light is received by the effective photosensitive area 133 in the fingerprint sensor 134 and converted into corresponding electrical signals, i.e., fingerprint detection signals; based on the fingerprint detection signal, fingerprint image data can be obtained, and fingerprint matching verification can be further performed, so that an optical fingerprint identification function is realized in the electronic device 10.

To optimize the recognition performance of the optical fingerprint recognition device 130, please continue to refer to fig. 2, the optical fingerprint recognition device 130 may further include an optical assembly 132 in addition to the fingerprint sensor 134 described above. Optionally, the optical element 132 may be disposed above the effective photosensitive area 133 of the fingerprint sensor 134, and may specifically include one or more of a filter layer for filtering out ambient light penetrating through the finger, an optical path guiding structure for guiding reflected light reflected from the surface of the finger to the effective photosensitive area 133 for optical detection, and other optical elements.

Fig. 3 shows a schematic structural diagram of an optical fingerprint identification apparatus 130 according to an embodiment of the present application.

As shown in fig. 3, the optical assembly 132 may include an optical Lens (Lens)1321, and the optical Lens 1321 is disposed between the display 120 and the fingerprint sensor 134. In a specific implementation, the optical lens 1321 may be disposed on the bracket 135, and the optical lens 1321 may be suspended between the display screen 120 and the fingerprint sensor 134 through the bracket 135.

The optical lens 1321 may include a convex lens therein. The convex lens can reversely image the fingerprint in the fingerprint detection area 103 in the effective photosensitive area 133 in the fingerprint sensor 134 by using the lens imaging principle, and the image of the fingerprint received by the effective photosensitive area 133 is a real image of the original fingerprint which is reversely reduced.

Since the optical lens 1321 can zoom out and image the original fingerprint in the fingerprint detection area 103, the area of the effective photosensitive area 133 in the fingerprint sensor 134 can be smaller than the area of the fingerprint detection area 103 in the display screen 120, so that the fingerprint identification in the larger fingerprint detection area 103 can be realized by using the smaller-sized fingerprint sensor 134, and the manufacturing cost of the fingerprint sensor 134 is lower.

However, in this embodiment, since the imaging is performed by using the principle of lens imaging, there is a requirement for an imaging distance between the fingerprint sensor 134 and the fingerprint detection area 103. In order to realize a larger fingerprint detection area 103, the Total Thickness of the optical path (TTL) of the entire optical fingerprint identification device 130 is also larger, so that the optical fingerprint identification device 130 occupies a larger under-screen Thickness space. In the present application, the total thickness TTL of the optical path of the optical fingerprint identification device 130 disposed below the display screen refers to the distance from the lower surface of the display screen 120 to the imaging plane of the fingerprint sensor 134.

Fig. 4 shows a schematic structural diagram of another optical fingerprint identification apparatus 130 provided in the embodiment of the present application.

As shown in fig. 4, in this embodiment, the optical element 132 may include a Micro-Lens (Micro-Lens) layer having a Micro-Lens array formed by a plurality of Micro-lenses and at least one aperture layer disposed between the Micro-Lens layer and the fingerprint sensor 134. Alternatively, the microlens array and the at least one aperture layer may be formed over the active photosensitive area 133 of the fingerprint sensor 134 by a semiconductor growth process or other processes. Specifically, in at least one aperture layer, each aperture layer includes: the light blocking layer and the light passing holes disposed in the light blocking layer, the light passing holes in at least one of the diaphragm layers may form a plurality of light guide channels, each of which may correspond to one of the light sensing units in the effective light sensing region 133 and has a specific guiding direction. The light guide channel is used for guiding fingerprint light signals in a specific direction in the light signals which pass through the finger and are converged by the micro lens to the corresponding sensing unit. The guiding directions of the light guide channels corresponding to each light sensing unit in the effective light sensing area 133 are the same.

In the technical solution of this embodiment, the optical fingerprint identification device 130 is not based on the optical lens imaging principle, but cooperates with the light guide channel through the micro-lens, so that each photosensitive unit in the effective photosensitive area 133 of the fingerprint sensor 134 can receive the fingerprint light signal in the same direction to image the fingerprint of the finger located in the fingerprint detection area 103. In this technical scheme, microlens not only can the convergent light signal for light signal intensity that every sensitization unit received is higher, in addition to improving fingerprint image quality of fingerprint sensor 134, cooperates the light signal after the microlens convergence, under the shorter condition of light-directing channel, also can realize better light guide function, thereby can reduce optical assembly 132's whole thickness. Therefore, the optical fingerprint identification device 130 in this embodiment can have a thinner thickness, and only occupies a smaller under-screen thickness space.

However, in this embodiment, since there is no scaling rule between the imaging optical path and the fingerprint detection region 103, the area of the effective photosensitive region 133 in the fingerprint sensor 134 is equivalent to that of the fingerprint detection region 103, and therefore, the area of the fingerprint sensor 134 is larger than that of the fingerprint detection region 103, which results in a larger size of the fingerprint sensor 134, and this results in a higher manufacturing cost of the optical fingerprint identification device 130 as a whole. Especially when the fingerprint detection area 103 required by the user is large, the manufacturing cost of the optical fingerprint identification device 130 in this embodiment is high and cannot be received by the user, thereby hindering the popularization and use of the optical fingerprint identification device 130.

In summary, for the optical fingerprint identification device 130 including the optical Lens (Lens), although the fingerprint sensor 134 with a smaller area may be provided, so that the overall manufacturing cost is lower, if the larger fingerprint detection area 103 needs to be realized, the optical fingerprint identification device 130 will occupy a larger under-screen thickness space.

For the optical fingerprint recognition device 130 including a Micro-Lens (Micro-Lens) layer and at least one diaphragm layer, although the thickness is small, the optical fingerprint recognition device does not occupy a large under-screen thickness space, but if a large fingerprint detection area 103 needs to be realized, the area of the fingerprint sensor 134 is large, which results in high overall manufacturing cost.

Therefore, in both of the above-mentioned schemes, the area of the fingerprint detection area 103 of the optical fingerprint recognition device 130 is about 6mm × 6mm in order to balance space and cost, and a higher fingerprint detection area cannot be realized.

In view of this, the present application provides an optical fingerprint identification device with a large fingerprint detection area, which is low in cost and small in occupied space.

Fig. 5 shows a schematic structure diagram of an optical fingerprint identification apparatus 200 according to an embodiment of the present application. The optical fingerprint identification device 200 is arranged below a display screen 120 of an electronic device to realize the underscreen fingerprint identification.

As shown in fig. 5, the optical fingerprint recognition device 200 includes:

first optical fingerprint identification module 210 includes: the optical lens 211 and the first fingerprint sensor 212, the first fingerprint sensor 212 is disposed below the optical lens 211, the optical lens 211 is configured to reduce the size of the first fingerprint pressed on the first fingerprint detection area 201 in the display screen 120 and image the first fingerprint sensor 212, and the first fingerprint sensor 212 is configured to receive the reduced size of the first fingerprint to detect the first fingerprint;

second optics fingerprint identification module 220, with the adjacent setting of this first optics fingerprint identification module 210, this second optics fingerprint identification module 220 includes: a microlens layer 221, at least one diaphragm layer 222 and a second fingerprint sensor 223, wherein the microlens layer 221 includes a plurality of microlenses; the at least one diaphragm layer 222 is disposed between the microlens layer 221 and the second fingerprint sensor 223, each diaphragm layer 222 in the at least one diaphragm layer 222 is provided with a light through hole, and is reflected or scattered by a second fingerprint pressed in the second fingerprint detection area 202 in the display screen 120, and a fingerprint light signal converged by the microlens layer 221 is transmitted to the second fingerprint sensor 223 through the light through hole to detect the second fingerprint.

Through the technical scheme of this embodiment, be provided with the first optics fingerprint identification module 210 and the second optics fingerprint identification module 220 of two different grade types simultaneously in the optics fingerprint identification device 200, this first optics fingerprint identification module 210 and the adjacent setting of second optics fingerprint identification module 220 to make the first fingerprint detection area 201 of first optics fingerprint identification module 210 and the adjacent setting of second fingerprint detection area 202 of second optics fingerprint identification module 220, can improve the holistic fingerprint detection area of optics fingerprint identification device 200. Through this embodiment, not only can the pressing of user's finger be convenient for, can also improve the fingerprint region area that optical fingerprint identification device 200 can detect under the single of user's finger presses down to improve optical fingerprint identification device 200's detection performance.

Wherein, first optics fingerprint identification module 210 utilizes optical lens imaging principle to form images, can reduce the formation of image in first fingerprint sensor 212 with user's fingerprint in first fingerprint detection area 201, therefore, compare in first fingerprint detection area 201, this first fingerprint sensor 212's area is less, reduces this first fingerprint sensor 212 and the manufacturing cost of the first optics fingerprint identification module 210 that is there.

In addition, the second optical fingerprint identification module 220 utilizes the microlens layer 221 and the at least one aperture layer 222 to perform imaging, and the overall thickness of the microlens layer 221 and the at least one aperture layer 222 is smaller, so that the space under the screen occupied by the second optical fingerprint identification module 210 can be reduced.

To sum up, through the technical scheme of this application embodiment, can combine first optics discernment fingerprint module 210 and second optics fingerprint identification module 220 advantage separately between them, on optics fingerprint identification device 200 has great fingerprint detection area's basis, balanced manufacturing cost and space for it is suitable for and sets up also can not cause manufacturing cost too high in the compact space of display screen, is favorable to optics fingerprint identification device 200's application popularization and development.

Alternatively, fig. 6 shows a schematic structure diagram of the first optical fingerprint identification module 210.

As shown in fig. 6, in the first optical fingerprint identification module 210, the optical lens 211 may include an aspheric lens or an aspheric lens group to reduce the imaging distortion of the fingerprint image.

As an example, the optical lens 211 may include three optical lenses, and the three optical lenses may include at least one convex lens. For example, in the embodiment shown in fig. 6, the three optical lenses are a concave lens, a convex lens and a convex lens respectively from the object side to the image side of the optical lens 211. The first lens close to the object side is a meniscus concave lens with a concave image side, and the middle second lens and the third lens close to the image side are convex lenses with convex object sides and convex image sides.

Through the cooperation design to this three optical lens's optical parameter, can be so that first optics fingerprint identification module 210 can have great Field Of View (FOV), less light path gross thickness TTL, less focus etc. is favorable to improving first optics fingerprint identification module 210's fingerprint identification performance to can promote fingerprint identification's rate Of accuracy and security.

Of course, the optical lens 211 may also include only one or two optical lenses, or a greater number of optical lenses, and the number and specific structure of the optical lenses in the optical lens 211 are not limited in this embodiment, so that the optical lens 211 can perform reduced imaging on the first fingerprint in the first fingerprint detection area 201.

Optionally, in this embodiment, the field angle FOV of the first optical fingerprint identification module 210 may be greater than or equal to 110 °, so as to increase the first fingerprint detection area 201 of the first optical fingerprint identification module 210 in the display screen 120.

Under the condition that the first optical fingerprint identification module 210 has a larger field angle FOV, the area of the first fingerprint detection area 201 of the first optical fingerprint identification module 210 may be greater than or equal to 36mm²For example, the first fingerprint detection area 201 may be equal to or greater than 6mm × 6 mm.

Alternatively, in a specific installation manner, the optical lens 211 may be accommodated in and fixed to a lens barrel, and the lens barrel may be supported and fixed by a bracket. In the embodiment of fig. 6, the holder and lens barrel are shown in their entirety as support assembly 216.

Specifically, in the embodiment of the present application, the first fingerprint sensor 212 may be a sensor chip, and the first fingerprint sensor 212 has a first effective photosensitive area 2121 therein for receiving the reduced image of the first fingerprint at the first fingerprint detection area 201 to detect the first fingerprint. The technical solution of the first fingerprint sensor 212 and the first effective photosensitive area 2121 thereof can be referred to the above description of the fingerprint sensor 134 and the effective photosensitive area 133 thereof, and will not be described in detail herein.

In addition, as shown in fig. 6, in addition to the supporting member 216, the first optical fingerprint identification module 210 further includes: the first circuit board is electrically connected to the first fingerprint sensor 212 and is used for transmitting the electrical signal of the first fingerprint sensor 212.

By way of example and not limitation, as shown in fig. 6, the first Circuit board may be a first Flexible Printed Circuit (FPC) 214, which may be bendable and thus suitable as a connector to connect the first fingerprint sensor 212 to other electrical components. Correspondingly, a first reinforcing plate 215 may be disposed below the first flexible circuit board 214 to support and reinforce the first flexible circuit board 214 and the first fingerprint sensor 212.

Optionally, a support member 216, such as a bracket, may be used to secure the first fingerprint sensor 212. As an example, the first fingerprint sensor 212 is fixed to the first circuit board, and the first circuit board is fixed to the bracket, so that the first fingerprint sensor 212 is fixed to the bracket, and the optical path distance between the optical lens 211 and the first fingerprint sensor 212 in the bracket is stable, which is beneficial to fingerprint imaging. Optionally, a cavity may be formed in the holder, in which the first fingerprint sensor 212 may be located, which may be used to protect the first fingerprint sensor 212 such that it is in a relatively stable working environment.

Optionally, the first optical fingerprint identification module 210 further includes: the optical filter 213, which may be an infrared filter 213, is used to filter infrared light and prevent the infrared light from interfering with fingerprint detection. In the embodiment shown in fig. 6, the filter 213 may be disposed on the surface of the first fingerprint sensor 212.

Alternatively, fig. 7 shows two schematic structural diagrams of the second optical fingerprint identification module 220.

As shown in fig. 7 (a) and (b), the second optical fingerprint identification module 220 includes a microlens layer 211, at least one aperture layer 222, and a second fingerprint sensor 223. The microlens layer 211 may include a microlens array formed of a plurality of microlenses, and the second fingerprint sensor 223 includes a second effective photosensitive area 2231 therein, and the second effective photosensitive area 2231 may include a plurality of photosensitive cells therein.

Alternatively, in some embodiments, as shown in fig. 7 (a), a plurality of microlenses in the microlens layer 211 may correspond one-to-one to a plurality of photosensitive cells in the second fingerprint sensor 223, i.e., each microlens in the microlens layer 211 corresponds to one photosensitive cell in the second fingerprint sensor 223. Each of the at least one aperture layer 222 has a light-passing hole formed therein, and the light-passing hole is correspondingly located between the microlens and the photosensitive unit. Each microlens in the microlens layer 211 focuses the received fingerprint light signal in the target direction to the corresponding photosensitive unit of the same microlens through the light-passing hole of at least one aperture layer 222, while the fingerprint light signal in the non-target direction is blocked or absorbed by other light-blocking areas in at least one aperture layer 222 except the light-passing hole. In a specific implementation, the light blocking region in at least one of the stop layers 222 may have a transmittance of light in a specific wavelength band (such as visible light or a wavelength band above 610 nm) smaller than a predetermined threshold (e.g., 20%) to prevent the corresponding light from passing through. In the above technical solution, the fingerprint light signal of the target angle received by each microlens may be a fingerprint light signal in an approximate single direction, so that the second fingerprint sensor 223 can achieve a good fingerprint detection effect.

Alternatively, in some embodiments, as shown in (b) of fig. 7, each microlens in the microlens layer 211 corresponds to a plurality of photosensitive cells in the second fingerprint sensor 223. As an example, each microlens in the microlens layer 211 may correspond to 2 × 2 photosensitive cells in the second fingerprint sensor 223. Specifically, the at least one aperture layer 222 is formed with a plurality of light guide channels in different directions corresponding to each microlens in the microlens layer 211, and a light sensing unit is disposed at the bottom of each light guide channel in the plurality of light guide channels in different directions. And in the fingerprint optical signals which are reflected or scattered by the second finger fingerprint above the display screen, return and are converged by the micro lens, a plurality of target fingerprint optical signals in different directions are respectively transmitted to the plurality of photosensitive units through the plurality of light guide channels, and the plurality of target fingerprint optical signals are used for detecting the second finger fingerprint.

In this embodiment, the light-sensing units disposed at the bottoms of the light-guiding channels and the light-guiding channels corresponding to each microlens can be regarded as a second optical fingerprint identification unit 2201, and the second optical fingerprint identification module 220 in this embodiment can be regarded as a module formed by a plurality of second optical fingerprint identification units 2201 in an array.

By the technical scheme, the same microlens in the microlens layer 211 can be used for receiving target fingerprint optical signals in multiple directions, and finally multiple fingerprint images can be acquired from the second fingerprint sensor 223, wherein each image is formed by a photosensitive unit which receives the target fingerprint optical signals in the same direction in the second fingerprint sensor 223. By utilizing the optical path structure in the embodiment of the application, the contrast and the brightness of the image formed by the second fingerprint sensor 223 can be greatly improved, and a larger view field can be provided, so that the overall fingerprint identification performance of the optical fingerprint identification device 200 is further improved.

As shown in fig. 7 (a) and (b), the second optical fingerprint recognition module 220 further includes: and a second circuit board electrically connected to the second fingerprint sensor 223 and configured to transmit an electrical signal of the second fingerprint sensor 223.

By way of example and not limitation, the second circuit board may be a second flexible circuit board (FPC)224, which may be bendable and thus suitable as a connector to connect the second fingerprint sensor 223 to other electrical components. Correspondingly, a second stiffener 225 may be disposed under the second flexible circuit board 224 to support and stiffen the second flexible circuit board 224 and the second fingerprint sensor 223.

Optionally, in this embodiment, the second fingerprint detection area 202 of the second optical fingerprint identification module 220May be 20mm in area²To 40mm²For example, the second fingerprint detection area 202 is 6mm × 6mm or less and 5mm × 5mm or more.

It is understood that, in the case that the second optical fingerprint identification module 220 adopts the technical solution of fig. 7 (a), the area of the second fingerprint detection area 202 may be equivalent to the area of the effective photosensitive area 2231 of the second fingerprint sensor 223. In the case that the second optical fingerprint identification module 220 employs the above-mentioned technical solution shown in fig. 7 (b), the area of the second fingerprint detection area 202 may be slightly larger than the area of the effective photosensitive area 2231 of the second fingerprint sensor 223.

Through the technical scheme of the embodiment of the application, the area of the second fingerprint detection area 202 of the second optical fingerprint identification module 220 is controlled to be 20mm²To 40mm²Between, can make second optics fingerprint identification module 220 have sufficient fingerprint detection area in order to detect user's fingerprint, and the area of second fingerprint sensor 223 also can not be too big, causes the rising of optics fingerprint identification device 200's cost.

Because be provided with optical lens 211 in the first optics fingerprint identification module 210, in order to satisfy this optical lens 211's formation of image light path requirement, and make first optics fingerprint identification module 210 have great fingerprint detection area 201, this first optics fingerprint identification module 210 can have module thickness thicker relatively. In order to save the installation space of the first optical fingerprint identification module 210 in the electronic device, the thickness space of other components in the electronic device can be utilized to embed the first optical fingerprint identification module 210 into other components of the electronic device.

As an example, fig. 8 shows a schematic structural diagram of another optical fingerprint identification device 200 provided in the embodiment of the present application. The electronic device in which the optical fingerprint identification apparatus 200 is located includes a middle frame 150 in addition to the display screen 120.

Optionally, in the optical fingerprint recognition device 200, the first optical fingerprint recognition module 210 may be fixedly disposed in the middle frame 150. Specifically, the middle frame 150 is disposed between the display screen 120 and the rear cover of the electronic device, and serves as a frame for carrying various components inside the electronic device, including but not limited to a battery, a main board, a camera, a cable, various sensors, a microphone, an earphone, and other components.

Optionally, an opening 151 is disposed along a thickness direction (a direction perpendicular to the display screen 120) of the middle frame 150, and at least a portion of the first optical fingerprint identification module 210 may be disposed in the opening 151 to reuse the thickness of the middle frame 150, so as to install the first optical fingerprint identification module 210 below the display screen 120, thereby saving an installation space of the first optical fingerprint identification module 210.

As an example, as shown in fig. 8, one end of the opening 151 close to the display screen 120 is provided with a protruding portion protruding toward the inside of the opening 151, and the first optical fingerprint identification module 210 may be fixed to the protruding portion by a fixing member, so as to implement the installation of the first optical fingerprint identification module 210 in the opening 151. Under this mounting means, first optics fingerprint identification module 210 is convenient for install, is dismantled and is convenient for draw forth first flexible circuit board 214 in first optics fingerprint identification module 210, makes it be connected with other electricity parts of electronic equipment, therefore can improve optics fingerprint identification device's production efficiency.

Of course, the first optical fingerprint identification module 210 may also be installed in the opening 151 by other installation methods in the related art, which is not specifically limited in the embodiment of the present application.

In addition, in the embodiment of the present application, besides the opening 151 is disposed in the middle frame 150 to accommodate the first optical fingerprint identification module 210, other accommodating spaces may be disposed in the middle frame 150, which is to be able to accommodate the first optical fingerprint identification module 210 by multiplexing the space of the middle frame 150.

In addition, as shown in fig. 8, in the first optical fingerprint identification module 210, a gap exists between the optical lens 211 and the display screen 120 to ensure an imaging optical path distance of the optical lens 211 on the object side, so as to ensure an imaging effect. And when the display screen 120 is pressed or the electronic device falls or collides, the optical lens 211 does not contact the lower surface of the display screen 120, so that the stability and the fingerprint identification performance of the first optical fingerprint identification module 210 are not affected.

In addition to providing the accommodating space such as the opening 151 in the middle frame 150 to accommodate the first optical fingerprint identification module 210, if the middle frame 150 is thinner, the first optical fingerprint identification module 210 may also be mounted on the lower surface of the middle frame 150, i.e. the surface of the middle frame 150 away from the display screen 120. In this case, in order to ensure that the first optical fingerprint identification module 210 can receive the optical signal after passing through the finger, the opening is also formed in the installation area of the middle frame 150 of the first optical fingerprint identification module 210, and the first optical fingerprint identification module 210 can be disposed below the opening.

Referring to fig. 8, in addition to the first optical fingerprint identification module 220 being disposed on the middle frame 150, the second optical fingerprint identification module 220 may also be disposed on the middle frame 150 to be installed below the display screen 120.

Because the second optical fingerprint identification module 220 does not have the requirement of optical path distance and its own thickness is thinner, thus can be convenient set up in the surface of center 150 towards display screen 120 to the fingerprint light signal of the finger above the display screen 120 is received to the second optical fingerprint identification module, improves light signal detection performance. The surface of the middle frame 150 facing the display screen 120 may also be referred to as the upper surface of the middle frame 150.

As an example, a certain gap may exist between the middle frame 150 and the display screen 120, and the second optical fingerprint identification module 220 may be directly disposed on the upper surface of the middle frame 150 by using the gap.

As another example, as shown in fig. 8, an upper surface of the middle frame 150 may be provided with a groove, and at least a portion of the second optical fingerprint identification module 220 may be disposed in the groove to multiplex a partial thickness of the middle frame 150, and the second optical fingerprint identification module 220 is installed.

Because the second optical fingerprint identification module 220 can be disposed on the surface of the middle frame 150, it does not need to open holes in the middle frame 150, and therefore, the installation of the second optical fingerprint identification module 220 has little or no influence on the middle frame 150, and the partial area of the middle frame 150 corresponding to the second optical fingerprint identification module 220 has sufficient strength and a hanging surface, and can be used for supporting other components in the electronic device.

Therefore, through the technical scheme of this application embodiment, make full use of the space of center 150 among the electronic equipment, all install first optics fingerprint identification module 210 and second optics fingerprint identification module 220 among the optics fingerprint identification device 200 in center 150, satisfying respective imaging demand, on the basis of guaranteeing the fingerprint identification performance, save the installation space at display screen 120 to be favorable to electronic equipment's miniaturization and frivolous development.

As described above, in the optical fingerprint recognition apparatus 200, the partial area of the middle frame 150 corresponding to the second optical fingerprint recognition module 220 has sufficient strength and a sufficient mounting surface for supporting other components mounted on the electronic device, and the partial area can be used for supporting the battery 160 mounted on the electronic device. Or, in another aspect, in the electronic device, a partial area of the middle frame 150 corresponding to the battery 160 may be recycled for installing the second optical fingerprint identification module 220 in the optical fingerprint identification apparatus 200.

Fig. 9 shows a schematic structural diagram of another optical fingerprint identification device 200 provided in the embodiment of the present application. The electronic device in which the optical fingerprint recognition apparatus 200 is located includes a battery 160 in addition to the display screen 120 and the middle frame 150.

As shown in fig. 9, in the embodiment of the present application, in the direction (z direction) perpendicular to the display screen 120, the battery 160 is located on the side of the middle frame 150 away from the display screen 120, and the second optical fingerprint identification module 220 is located on the side of the middle frame 150 facing the display screen 120. Therefore, in the direction perpendicular to the display screen 120 (z direction), the second optical fingerprint identification module 220 is located on the side of the battery 160 facing the display screen 120. The second optical fingerprint identification module 220 is located in the projection of the battery 160 on the plane of the display screen 120, wherein most of the area or all of the area of the projection of the second optical fingerprint identification module 220 on the plane of the display screen 120 is located in the projection of the battery 160 on the plane of the display screen 120.

Generally speaking, if the display screen 120 is disposed along the horizontal plane, the middle frame 150 is disposed below the display screen 120, the second optical fingerprint identification module 220 and the battery 160 are disposed on the upper and lower surfaces of the middle frame 150, respectively, and the second optical fingerprint identification module 220 can be disposed above the battery 160 and between the battery 160 and the display screen 120.

Further, with continued reference to fig. 9, in the embodiment of the present application, the first optical fingerprint identification module 210 is located at one side of the battery 160 in a direction (x direction) parallel to the display screen 120. That is, in the embodiment of the present application, the first optical fingerprint identification module 210 and the battery 160 may be located below the display screen 120 side by side, and projections of the first optical fingerprint identification module and the battery on a plane where the display screen 120 is located do not overlap with each other. Therefore, the middle frame 150 can be provided with the opening 151 in the area where the first optical fingerprint identification module 210 is located, without affecting the installation of the battery 160 in the middle frame 150.

Through the technical scheme of this application embodiment, the peripheral space of battery 160 in the utilization electronic equipment that can be reasonable sets up first optics fingerprint identification module 210 and second optics fingerprint identification module 220 among the optics fingerprint identification device 200 respectively. On the basis of meeting the imaging requirement of the optical fingerprint identification device 200 and ensuring the fingerprint identification performance, the battery 160 and the optical fingerprint identification device 200 can be compactly and reasonably arranged below the display screen 120.

Alternatively, the direction (x direction) parallel to the display screen 120 may be a direction parallel to any one side of the display screen 120. As an example, if the display screen 120 is disposed along a vertical plane, a first side of the display screen 120 is parallel to the vertical direction, and the direction (x direction) parallel to the display screen 120 may be a direction parallel to the first side, that is, the direction (x direction) parallel to the display screen 120 may be a vertical direction, in which case, the first optical fingerprint identification module 210 may be located above or below the battery 160.

Fig. 10 shows a schematic top view of an optical fingerprint recognition device 200 provided by an embodiment of the present application below a display screen 120.

Optionally, in this embodiment of the application, on the basis that the first optical fingerprint identification module 210 and the second optical fingerprint identification module 220 are adjacently disposed, the first optical fingerprint identification module 210 and the second optical fingerprint identification module 220 may be correspondingly disposed below the middle region or the middle-lower region of the display screen 120.

Specifically, in the embodiment of the present application, the middle area or the middle lower area of the display screen 120 refers to the middle area or the middle lower area of the display screen 120 viewed by the user when the display screen 120 faces the user. This partial area is convenient for the user to point the operation, therefore, in order to improve the user experience for the user operation, can set up the first optics fingerprint identification module 210 and the second optics fingerprint identification module 220 the below of this display screen 120's middle part region or middle and lower part region.

Optionally, in the embodiment shown in fig. 10, a battery 160 of the electronic device is further shown, the battery 160 is disposed at a lower position in the middle of the display screen 120, but the battery 160 has a certain distance from the bottom area of the display screen 120, and the corresponding distance between the battery 160 and the bottom area of the display screen can be used for disposing electrical components such as a flat cable of the electronic device.

Therefore, referring to the above position relationship between the first optical fingerprint identification module 210 and the second optical fingerprint identification module 220 and the battery 160, the first optical fingerprint identification module 210 may be disposed on one side of the battery 160 facing the bottom area of the display screen 120, and the second optical fingerprint identification module 220 may be disposed on one side of the first optical fingerprint identification module 210 facing the top area of the display screen 120.

Similar to the middle or middle and lower regions of the display screen 120, the bottom and top regions of the display screen 120 refer to the bottom or top regions of the display screen 120 that are viewed by the user when the display screen 120 is facing the user.

At present, in the prior art, due to the influence of the arrangement of the polaroid and the screen dot matrix in the display screen, the fingerprint image collected by the fingerprint identification device under the screen usually has the problems of clear diagonal angle and local blurring, the influence of the blurring area on fingerprint detection is large, the fingerprint identification failure can be caused seriously, and the user experience is influenced.

Therefore, in order to solve the problem, in the above optical fingerprint identification apparatus 200, the position of the first fingerprint sensor 212 in the first optical fingerprint identification module 210 and/or the position of the second fingerprint sensor 223 in the second optical fingerprint identification module 220 can be adjusted to form a certain angle with the display screen 120, so that the influence of the polarizer in the display screen 120 on the optical signal can be effectively reduced, and meanwhile, the moire fringes can be significantly reduced or eliminated.

Fig. 11 shows a schematic top view and an enlarged schematic view of the first fingerprint sensor 212 and the second fingerprint sensor 223 below the display screen 120 in the optical fingerprint recognition device 200 according to the embodiment of the present application.

As shown in fig. 11, in the first optical fingerprint identification module 210, a first included angle θ is formed between a first direction of the display screen 120 and a first direction of the first fingerprint sensor 212₁Wherein the first direction of the display screen 120 is parallel to the first side of the display screen 120, the first direction of the first fingerprint sensor 212 is parallel to the first side of the first fingerprint sensor 212, and the first included angle θ is₁Between 3 degrees and 17 degrees, or the first included angle theta₁Between-3 degrees and-17 degrees.

In some preferred embodiments, the first included angle θ₁And may be 15 degrees or-15 degrees.

It should be noted that, conventionally, the first fingerprint sensor 212 may be a quadrilateral chip, and the first side of the first fingerprint sensor 212 may be any side of the quadrilateral chip. Similarly, in a conventional case, the display screen 120 is a quadrilateral display screen, and the first side of the display screen 120 may be any side of the quadrilateral display screen.

In addition, conventionally, the display screen 120 includes a display pixel array, and the first side of the display screen 120 is parallel to a row direction or a column direction of the display pixel array, that is, the first direction of the display screen 120 is the row direction or the column direction of the display pixel array; the first fingerprint sensor 212 comprises an array of photosensitive cells, and a first side of the first fingerprint sensor 212 is parallel to a row direction or a column direction of the array of photosensitive cells, i.e. the first direction of the first fingerprint sensor 212 is the row direction or the column direction of the array of photosensitive cells. In the embodiment of the present application, the first direction of the display screen 120 and the first direction of the first fingerprint sensor 212 have a first included angle θ₁The actual angle may be the angle between the display pixel array in the display screen 120 and the sensing unit array in the first fingerprint sensor 212.

For example, as shown in FIG. 11, in one embodiment, the first side of the display 120 may be the short side thereof, and the first direction of the display 120 is the direction O-A in the figure; the first side of the first fingerprint sensor 212 is the upper side or the lower side of the quadrilateral sensor in the figure, the first direction of the first fingerprint sensor 212 is the direction O-B in the figure, and the included angle between the direction O-A and the direction O-B is A first included angle thetA₁。

It should be understood that the embodiment of the present application introduces the concept of the first side only for clearly indicating the position relationship between the first fingerprint sensor 212 and the display screen 120, and does not indicate that the outer shapes of the display screen 120 and the first fingerprint sensor 212 are necessarily a standard quadrilateral, and when the display screen 120 or the first fingerprint sensor 212 is in other irregular shapes, a virtual side or axis such as the central axis of the display screen 120 or the first fingerprint sensor 212 may be used as a reference, which is not limited in the embodiment of the present application as long as the first fingerprint sensor 212 has the first included angle θ with respect to the display screen 120₁Just as the deflection of (2).

In this application embodiment, first fingerprint sensor 212 has certain contained angle with display screen 120, can reduce the interference of the polaroid in display screen 120 to the fingerprint image, reduces or eliminates moire fringe simultaneously to make the fingerprint image of first fingerprint sensor 212 collection more clear, can promote fingerprint identification's performance.

Optionally, as an example, the deflection angle of the first fingerprint sensor 212 in fig. 11 is between 3 degrees and 17 degrees, and after horizontally flipping the mirror image of the first fingerprint sensor 212 in fig. 11, the deflection angle of the first fingerprint sensor 212 may be between-3 degrees and-17 degrees.

In addition to the first fingerprint sensor 212 being disposed under the display screen 120 at an angle, the second fingerprint sensor 223 can also be disposed under the display screen 120 at an angle.

Specifically, the first orientation of the second fingerprint sensor 223 is in contact with the first side of the display screenTo have a second included angle theta₂Wherein the first direction of the display screen 120 is parallel to the first side of the display screen 120, the first direction of the second fingerprint sensor 223 is parallel to the first side of the second fingerprint sensor 223, and the second included angle θ₂Between-15 degrees and 15 degrees, and the second included angle theta₂Not equal to 0 degrees.

In some preferred embodiments, the second included angle θ₂And may be 10 degrees or-10 degrees.

For example, as shown in FIG. 11, in one embodiment, the first side of the display 120 may be the short side thereof, and the first direction of the display 120 is the direction O-A in the figure; the first side of the second fingerprint sensor 223 is the upper side or the lower side of the quadrilateral sensor in the figure, the first direction of the second fingerprint sensor 223 is the O-C direction in the figure, and the included angle between the O-A direction and the O-C direction is A second included angle thetA₂。

Specifically, the scheme for setting the relative position between the second fingerprint sensor 223 and the display screen 120 may refer to the above technical scheme for setting the relative position between the first fingerprint sensor 223 and the display screen 120, which is not described herein in detail.

It is understood that, with the deflection of the first fingerprint sensor 212 and/or the second fingerprint sensor 223, the first fingerprint detection area 201 of the first optical fingerprint identification module 210 and/or the second fingerprint detection area 202 of the second optical fingerprint identification module 220 are deflected accordingly.

In order to optimize the fingerprint identification effect, optionally, but first fingerprint detection area 201 of first optics fingerprint identification module 210 and second fingerprint detection area 202 of second optics fingerprint identification module 220 interconnect, seamless between the two to when making the user finger press, the central zone and the peripheral zone homoenergetic of fingerprint are detected by optics fingerprint device 200, improve the fingerprint identification effect.

Fig. 12 shows a schematic diagram of a first fingerprint detection area 201 and a second fingerprint detection area 202 provided in an embodiment of the present application.

As shown in fig. 12, x₁The direction may be a first direction, x, of the display screen 120₂The orientation may be a second orientation of the display screen 120 that is perpendicular to the first orientation. When the first fingerprint sensor 212 is deflected relative to the display screen 120, the first fingerprint detection area 201 is correspondingly deflected relative to the display screen 120. Specifically, the first fingerprint detection area 201 can also be regarded as a quadrilateral fingerprint detection area, and the first direction of the first fingerprint detection area 201 can also be parallel to the first direction x of the display screen 120₁At a first included angle theta₁Wherein the first direction of the first fingerprint detection area 201 is a direction parallel to the first edge of the first fingerprint detection area 201. As an example, the first side of the first fingerprint detection area 201 may be the lower side of the first fingerprint detection area 201 in fig. 11.

Similarly, when the second fingerprint sensor 223 is deflected relative to the display screen 120, the second fingerprint detection area 202 is correspondingly deflected relative to the display screen 120. Specifically, the second fingerprint detection area 202 can also be regarded as a quadrilateral fingerprint detection area, and the first direction of the second fingerprint detection area 202 can be aligned with the first direction x of the display screen 120₁At a second included angle theta₂Wherein the first direction of the second fingerprint detection area 202 is a direction parallel to the first side of the second fingerprint detection area 202. As an example, the first side of the second fingerprint detection area 202 may be the upper side of the first fingerprint detection area 201 in fig. 12.

Alternatively, as shown in fig. 12, the first side (lower side) of the first fingerprint detection area 201 is adjacent to the first side (upper side) of the second optical fingerprint identification module 202, and the distance D between the center of the first fingerprint detection area 201 and the center of the second fingerprint detection area 202 may be (W)₁+W₂) 2-1mm to (W)₁+W₂) A/2 +2mm, wherein W₁W is the length of the second side (left side or right side) of the first fingerprint detection area 201₂Is the length of the second side (left side or right side) of the second fingerprint detection area 202.

In some preferred embodiments, the distance D between the center of the first fingerprint detection area 201 and the center of the second fingerprint detection area 202 may be (W)₁+W₂) 2-0.5mm to (W)₁+W₂) And/2 +0.5 mm.

If the distance D between the center of the first fingerprint detection area 201 and the center of the second fingerprint detection area 202 is (W)₁+W₂) About 2, then the region of the place on (downside one side) of first fingerprint detection area 201 and the region of the place on first side (upside one side) of second optics fingerprint identification module 202 can just intersect, and the total area of first fingerprint detection area 201 and second fingerprint detection area 202 can be great this moment to form the great field of view of optics fingerprint identification device 200, promote optics fingerprint identification device 200's wholeness ability.

If the distance D between the center of the first fingerprint detection area 201 and the center of the second fingerprint detection area 202 is smaller than (W)₁+W₂) A/2, the first fingerprint detection area 201 and the second fingerprint detection area 202 have a certain overlapping area, whereas if the distance D between the center of the first fingerprint detection area 201 and the center of the second fingerprint detection area 202 is larger than (W)₁+W₂) And/2, there is a certain gap between the first fingerprint detection area 201 and the second fingerprint detection area 202.

Therefore, according to the technical solution of the embodiment of the present application, the distance D between the center of the first fingerprint detection area 201 and the center of the second fingerprint detection area 202 is controlled to be (W)₁+W₂) 2-1mm to (W)₁+W₂) Between 2+2mm, the first fingerprint detection area 201 and the second fingerprint detection area 202 can be prevented from having a large overlapping area to cause loss of the field of view, and the gap between the first fingerprint detection area 201 and the second fingerprint detection area 202 is small, so that the influence on fingerprint identification is small.

Specifically, for example, the first fingerprint detection area 201 has a size of 6.8mm × 8.8mm, and the second fingerprint detection area 202 has a size of 5.5mm × 5.5 mm. If the long side of the first fingerprint detection area 201 is disposed adjacent to the second fingerprint detection area 202, the distance between the center of the first fingerprint detection area 201 and the center of the second fingerprint detection area 202 can be controlled to be about 6mm, so that the first fingerprint detection area 201 and the second fingerprint detection area 202 are connected to each other.

At this time, the total area of the fingerprint detection area of the optical fingerprint recognition device 200, which is the sum of the areas of the first fingerprint detection area 201 and the second fingerprint detection area 202, is about 87mm². Typically, the single finger print 141 formed by the user's finger pressing on the display screen 120 is an ellipse having a length of 20-25mm and a width of 10-15 mm. If the size of the finger-pressed fingerprint is represented by an ellipse of 20mm x 13mm, the area of the ellipse is about 204mm². As shown in fig. 13 (a) and (b), when the user presses the finger from both left and right directions, the finger print 141 covers the entire first and second fingerprint detection areas 201 and 202, so that the optical fingerprint recognition device 200 can obtain about 42% of the area of the user's finger with a single press of the user's single finger, and the fingerprint recognition effect can be improved.

It is understood that, in the embodiment of the present application, the center of the first fingerprint detection area 201 may correspond to the center of the first effective photosensitive area 2121 in the first fingerprint sensor 212, and the center of the second fingerprint detection area 202 may correspond to the center of the second effective photosensitive area 2231 in the second fingerprint sensor 223, that is, the distance between the center of the effective photosensitive area in the first fingerprint sensor 212 and the center of the effective photosensitive area in the second fingerprint sensor 223 may be approximately equal to or equal to the distance between the center of the first fingerprint detection area 201 and the center of the second fingerprint detection area 202.

Optionally, in this embodiment, the optical fingerprint recognition device 200 may include: at least one of the first optical fingerprint identification module 210 and at least one of the second optical fingerprint identification module 220.

For example, in the above-mentioned embodiments, the optical fingerprint identification device 200 may include a first optical fingerprint identification module 210 and a second optical fingerprint identification module 220. Or, in other embodiments, the optical fingerprint recognition device 200 can further include a first optical fingerprint recognition module 210 and a plurality of second optical fingerprint recognition modules 220, a plurality of first optical fingerprint recognition modules 210 and a second optical fingerprint recognition module 220, or a plurality of first optical fingerprint recognition modules 210 and a plurality of second optical fingerprint recognition modules 220, so as to further increase the fingerprint detection area of the optical fingerprint recognition device 200 and improve the fingerprint recognition performance.

Optionally, in the case that the optical fingerprint recognition device 200 includes a plurality of first optical fingerprint recognition modules 210, the structure of the plurality of first optical fingerprint recognition modules 210 may be the same, for example, may be the same as the structure of the first optical fingerprint recognition module 210 shown in fig. 6. The plurality of first optical fingerprint identification modules 210 each have respective supporting components 216, first flexible circuit boards 214, and the like, and the plurality of first optical fingerprint identification modules 210 can be correspondingly disposed in the plurality of openings 151 of the middle frame 150.

To the installation positions of the plurality of first optical fingerprint identification modules 210, optionally, in some embodiments, each of the plurality of first optical fingerprint identification modules 210 may be located on a side of the battery 160 facing the bottom area of the display screen 120.

Optionally, the plurality of first optical fingerprint identification modules 210 may be disposed adjacently. In addition, in order to promote the horizontal fingerprint detection area in the display screen 120, the user's finger can be pressed horizontally, and as an example, the plurality of first optical fingerprint identification modules 210 can be arranged below the display screen 120 horizontally and sequentially.

Optionally, in a case where the optical fingerprint recognition device 200 includes a plurality of second optical fingerprint recognition modules 220, the structures of the plurality of second optical fingerprint recognition modules 220 may also be the same, for example, may be the same as the structure of the second optical fingerprint recognition module 220 shown in fig. 7. Optionally, in order to save the manufacturing cost and facilitate the precise control of the distance between the plurality of second fingerprint sensors 223 in the plurality of second optical fingerprint identification modules 220, the plurality of second fingerprint sensors 223 may be disposed on the same circuit board, for example, on the same flexible circuit board.

To the installation position of the plurality of second optical fingerprint identification modules 220, optionally, in some embodiments, each second optical fingerprint identification module 220 in the second optical fingerprint identification module 220 may be located on a side of the first optical fingerprint identification module 210 facing the bottom area of the display screen 120. Optionally, each of the second optical fingerprint recognition modules 220 may be disposed on one side of the battery 160 facing the display screen.

Optionally, the plurality of second optical fingerprint identification modules 220 may be disposed adjacently. In addition, in order to promote the horizontal fingerprint detection area in the display screen 120, the user's finger can be conveniently pressed horizontally, and as an example, the plurality of second optical fingerprint identification modules 220 can be arranged below the display screen 120 horizontally in sequence.

Optionally, the optical fingerprint recognition device 200 may include: two second optics fingerprint identification modules 220 and at least one first optics fingerprint identification module 210, the distance between two second fingerprint detection area 202 of two second optics fingerprint identification modules 220 is within 1mm, and at least one first fingerprint detection area 201 of at least one first optics fingerprint identification module 210 connects in the region that two second fingerprint detection area 202 formed.

It should be noted that the two second fingerprint detection areas 201 are two discrete areas, and in the embodiment of the present application, the whole of the two discrete areas may be referred to as an area formed by the two second fingerprint detection areas 202.

As an example, fig. 14 shows a schematic diagram of another first fingerprint detection area 201 and a second fingerprint detection area 202 provided in the embodiment of the present application.

As shown in fig. 14, in the embodiment of the present application, the optical fingerprint recognition device 200 may include: two second optics fingerprint identification modules 220 and a first optics fingerprint identification module 210, wherein, a first optics fingerprint identification module 210 corresponds a first fingerprint detection area 201, and two second optics fingerprint identification modules 220 correspond two second fingerprint detection areas 202.

In particular, each of the two second fingerprint detection areas 202 may be adjacent to the first fingerprint detection area 201. Further, each of the second fingerprint detection areas 202 may be interconnected with the first fingerprint detection area 201.

In addition, since the area of the second fingerprint detection area 202 in the second optical fingerprint identification module 220 is only equal to or slightly larger than the area of the effective photosensitive area of the second fingerprint sensor 223, a certain mounting gap may exist between two second fingerprint sensors 223 during the mounting process of the second fingerprint sensor 223, and therefore a certain gap may also be generated between two second fingerprint detection areas 202. In the embodiment of the present application, the distance between the two second fingerprint detection areas 202 can be controlled within 1mm or even within 0.5mm by controlling the installation distance between the two second fingerprint sensors 223, so as to reduce the influence on fingerprint identification and improve the fingerprint identification performance of the optical fingerprint identification apparatus 200.

Specifically, for example, the first fingerprint detection area 201 has a size of 6.8mm × 8.8mm, and the second fingerprint detection area 202 has a size of 5.5mm × 5.5 mm. If the long edge of the first fingerprint detection area 201 is adjacent to two second fingerprint detection areas 202, as shown in fig. 14, the distance between the center of the first fingerprint detection area 201 and the centers of the two second fingerprint detection areas 202 is shown as D in the figure₁₁，D₁₂And D₁₃Shown by the formula D₁₁，D₁₂And D₁₃Respectively about 6.2mm, 6.2mm and 6.9 mm.

At this time, the total fingerprint detection area of the optical fingerprint recognition device 200 is about the sum of the areas of one first fingerprint detection area 201 and two second fingerprint detection areas 202, which is about 117mm²If a certain overlap area is subtracted, the remaining fingerprint detection area is about 115mm². For a 20mm x 13mm finger print, as shown in fig. 15 (a) and (b), when the user's finger is pressed from both left and right directions, the entire fingerprint detection area can cover most of the finger print 141, and therefore, the optical fingerprint identification device 200 can obtain about 56% of the area in the user's finger with a single press of the user's single finger, which can further improve the fingerprint identification effect.

Optionally, the optical fingerprint recognition device 200 may include: two first optics fingerprint identification modules 210 and at least one second optics fingerprint identification module 220, two first fingerprint detection area 201 of two first optics fingerprint identification modules 210 each other's overlap and interconnect, and at least one second fingerprint detection area 202 of at least one second optics fingerprint identification module 220 connects in the region that two first fingerprint detection area 201 formed.

As an example, fig. 16 shows a schematic diagram of another first fingerprint detection area 201 and a second fingerprint detection area 202 provided in the embodiment of the present application.

As shown in fig. 16, in the embodiment of the present application, the optical fingerprint recognition device 200 may include: two first optics fingerprint identification modules 210 and a second optics fingerprint identification module 220, wherein, two first optics fingerprint identification modules 210 correspond two first fingerprint detection area 201, and a second optics fingerprint identification module 220 corresponds a second fingerprint detection area 202.

In particular, each of the two first fingerprint detection areas 201 may be adjacent to the second fingerprint detection area 202. Further, each of the first fingerprint detection areas 201 may be interconnected with a second fingerprint detection area 202.

In addition, since the optical lens 211 is disposed in the first optical fingerprint identification module 220, the area of the first fingerprint detection area 201 of the first optical fingerprint identification module 220 is much larger than the area of the first effective photosensitive area 2121 of the first fingerprint sensor 212. Therefore, the two first fingerprint detection areas 201 can be connected seamlessly, i.e. the two first fingerprint detection areas 201 are not overlapped and connected with each other.

Specifically, for example, the first fingerprint detection area 201 has a size of 6.8mm × 8.8mm, and the second fingerprint detection area 202 has a size of 5.5mm × 5.5 mm. As shown in FIG. 16, the distance between the centers of the two first fingerprint detection areas 201 and the center of the second fingerprint detection area 202 is shown as D₂₁，D₂₂And D₂₃Shown by the formula D₂₁，D₂₂And D₂₃Respectively about 6.4mm, 8.6mm and 7.7 mm.

At this time, the total area of the fingerprint detection areas of the optical fingerprint recognition device 200 is about the sum of the areas of one first fingerprint detection area 201 and two second fingerprint detection areas 202, which is about 143mm². For theIn the 20mm × 13mm finger print, when the user presses the finger from the left and right directions, the entire fingerprint detection area can cover most of the finger print, so that the optical fingerprint identification device 200 can obtain about 65% of the area of the user's finger when the user presses the finger once, and the fingerprint identification effect can be further improved.

Fig. 17 shows a schematic diagram of another first fingerprint detection area 201 and a second fingerprint detection area 202 provided in the embodiment of the present application.

As shown in fig. 17, in the embodiment of the present application, the optical fingerprint recognition device 200 may include: two first optics fingerprint identification modules 210 and two second optics fingerprint identification modules 220, two first optics fingerprint identification modules 210 correspond two first fingerprint detection area 201, and two second optics fingerprint identification modules 220 correspond two second fingerprint detection area 202.

Specifically, in the embodiment of the present application, specific schemes of the two first fingerprint detection areas 201 and the two second fingerprint detection areas 202 can be referred to the related descriptions in the embodiments shown in fig. 12 to fig. 16, and redundant descriptions are not repeated here.

Specifically, for example, the first fingerprint detection area 201 has a size of 6.8mm × 8.8mm, and the second fingerprint detection area 202 has a size of 5.5mm × 5.5 mm. As shown in FIG. 17, the distance between the centers of the two first fingerprint detection areas 201 and the centers of the two second fingerprint detection areas 202 is shown as D₃₁，D₃₂、D₃₃And D₃₄Shown by the formula D₂₁，D₂₂、D₂₃And D₃₄Respectively about 6.4mm, 8.6mm, 6.3mm and 6 mm.

At this time, the total area of the fingerprint detection areas of the optical fingerprint recognition device 200 is about the sum of the areas of the two first fingerprint detection areas 201 and the two second fingerprint detection areas 202, which is about 173mm². For a 20mm x 13mm finger print, the entire fingerprint sensing area may cover most of the finger print when the user's finger is pressed from both the left and right directions, and thus, the optical fingerprint identification device 200 may obtain about 70-80% of the area of the user's finger in a single press of the user's single finger, which may be further processedThe fingerprint identification effect is improved.

In the embodiment shown in fig. 12 to 17 above, the fingerprint detection areas of the plurality of optical fingerprint recognition modules in the optical fingerprint recognition device 200 are connected to each other, and the whole fingerprint detection area of the optical fingerprint recognition device 200 with a small gap is relatively complete and large in area, so that the optical fingerprint recognition device is more suitable for the application scene of the fingerprint recognition of a single finger of a user.

In other application scenarios, such as the fingerprint recognition scenario of two fingers of a user, in order to improve the fingerprint recognition performance of the optical fingerprint recognition device 200, optionally, the optical fingerprint recognition device 200 may include: two second optics fingerprint identification modules 220 and a first optics fingerprint identification module 210, the distance between the second fingerprint detection area 202 of these two second optics fingerprint identification modules 220 is between 20mm to 30mm, and the first fingerprint detection area 201 of this a first optics fingerprint identification module 210 is located between two second fingerprint detection areas 202.

Fig. 18 shows a schematic diagram of another first fingerprint detection area 201 and a second fingerprint detection area 202 provided in the embodiment of the present application. Fig. 19 shows two schematic views of a user's finger pressing on the first fingerprint detection area 201 and the second fingerprint detection area 202 shown in fig. 18.

As shown in fig. 18, in the embodiment of the present application, the optical fingerprint recognition device 200 may include: two second optics fingerprint identification modules 220 and a first optics fingerprint identification module 210, wherein, a first optics fingerprint identification module 210 corresponds a first fingerprint detection area 201, and two second optics fingerprint identification modules 220 correspond two second fingerprint detection areas 202.

Specifically, two second fingerprint detection area 202 that second optics fingerprint identification module 220 corresponds's central distance can be more than or equal to certain threshold value, for example more than or equal to 20mm, is suitable for two fingers of user and presses simultaneously on two second fingerprint detection area, makes things convenient for optics fingerprint identification device 200 to acquire the fingerprint information of two fingers of user simultaneously, strengthens fingerprint identification's the degree of accuracy and improves fingerprint detection's performance. For example, fig. 19 (a) shows a schematic diagram in which two fingers of the user press two second fingerprint detection areas 202 at the same time.

Meanwhile, because the centers of the two second fingerprint detection areas 202 corresponding to the two second optical fingerprint identification modules 220 have a certain distance, a first optical fingerprint identification module 210 can be arranged between the two second optical fingerprint identification modules 220, so that the first fingerprint detection area 201 of the first optical fingerprint identification module 210 is positioned between the two second fingerprint detection areas 202. Optionally, two second fingerprint detection area 202's that two second optics fingerprint identification module 220 correspond central distance can be less than or equal to certain threshold value, for example less than or equal to 30mm, be located first fingerprint detection area 201 between these two second fingerprint detection area 202 can detect user's single finger fingerprint with arbitrary second fingerprint detection area 202 in two second fingerprint detection area 202 jointly, promptly under user's single finger is pressed, optics fingerprint identification device 200 still can have great fingerprint detection area, can improve fingerprint detection performance. For example, fig. 19 (b) shows a schematic diagram in which a single finger of the user presses simultaneously one second fingerprint detection area 202 and one first fingerprint detection area 201.

Through above-mentioned embodiment, in optics fingerprint identification device 200, utilize two second optics fingerprint identification modules 220 and a first optics fingerprint identification module 210 for optics fingerprint identification device 200 can be applicable to the application scene of the fingerprint identification of user's single finger and the application scene of the fingerprint identification of two fingers simultaneously, and under the application scene of the fingerprint identification of single finger, optics fingerprint identification device 200 can have higher fingerprint detection performance. In addition, the space that second optics fingerprint identification module 220 occupy in display screen 120 below is less, and more suitable adoption second optics fingerprint identification module 220 carries out the fingerprint identification of two fingers of user.

Of course, in other embodiments, the optical fingerprint recognition device 200 may also include two first optical fingerprint recognition modules 210 and one second optical fingerprint recognition module 220, and the one second optical fingerprint recognition module 220 is disposed between the two first optical fingerprint recognition modules 210, so as to realize the fingerprint recognition of the single finger and the fingerprint recognition of both fingers of the user.

Optionally, in this embodiment, the center of the first fingerprint detection area 201 of the first optical fingerprint identification module 210 may be located on a first straight line, the first straight line is a central axis of a central connecting line of the two second fingerprint detection areas 202, and the first straight line is parallel to the display screen.

As an example, as shown in fig. 18, a line L 'is a central line of two second fingerprint detection areas 202, and is also referred to as a central line L' hereinafter. Alternatively, the center line L' may be parallel to the bottom edge of the display screen 120, and the two second fingerprint detection areas 202 are arranged laterally in the display screen 120. In other words, the two second optical fingerprint identification modules 220 may be transversely arranged below the display screen 120.

In the example shown in fig. 18, the center of the first fingerprint detection area 201 of the first optical fingerprint identification module 210 may be located at the center point of the central connecting line L'. With the exemplary embodiment, the two second fingerprint detection areas 202 are respectively located on two sides of the first fingerprint detection area 201 at equal distances, so that when a user presses the display screen 120 with a finger in two directions, the first fingerprint detection area 201 and one of the two second fingerprint detection areas 202 are used for receiving the fingerprint of the user.

As another example, fig. 20 shows a schematic diagram of another first fingerprint detection area 201 and a second fingerprint detection area 202 provided in the embodiment of the present application. As shown in fig. 20, the line L is a central axis of the central connecting line L ', i.e. the central connecting line L' is symmetrical with respect to the line L, and the line L passes through the center of the central connecting line L 'and is perpendicular to the central connecting line L', and is parallel to the plane of the display screen 120. This line L is also referred to below as the first straight line L.

In the example shown in fig. 20, the center of the first fingerprint detection area 201 of the first optical fingerprint identification module 210 may be located at a position other than the center point of the center line L' in the first line L.

In some electronic devices, other components of the electronic device, such as a flat cable, may be disposed around the area where the first optical fingerprint identification module 210 is located, and in order to avoid the flat cable, compared to the example shown in fig. 18, in this example, two second optical fingerprint identification modules 220 are slightly distant from the first optical fingerprint identification module 210, which may facilitate the installation and installation of the flat cable in the electronic device.

Optionally, in this example, the first optical fingerprint identification module 210 may be located at a side of the battery 160 of the electronic device facing the bottom area of the display screen 120, and the two second optical fingerprint identification modules 220 may be located at a side of the first optical fingerprint identification module 210 facing the top area of the display screen 120. Optionally, the two second optical fingerprint identification modules 220 may be located on a side of the battery 160 facing the display screen 120 in a direction perpendicular to the display screen 120.

Through the technical scheme of this example, can be on the basis of guaranteeing optical fingerprint identification device 200's fingerprint detection performance, compromise the installation of other parts in the electronic equipment for the overall arrangement of each part is compacter and more reasonable in the electronic equipment.

Based on the embodiments shown in fig. 18 to 20, optionally, the optical fingerprint identification apparatus 200 may further include the first optical fingerprint identification module 210 or the second optical fingerprint identification module 220.

Fig. 21 shows a schematic diagram of another first fingerprint detection area 201 and a second fingerprint detection area 202 provided in the embodiment of the present application.

As shown in fig. 21, in the embodiment of the present application, the optical fingerprint recognition device 200 may include: three second optics fingerprint identification module 220 and a first optics fingerprint identification module 210, in three second optics fingerprint identification module 220, two second fingerprint detection area 202's of two second optics fingerprint identification module 220 central distance is between 20mm to 30mm, and a second fingerprint detection area 202 of another second optics fingerprint identification module 220 and a first fingerprint detection area 201 of a first optics fingerprint identification module 210 are located between two second fingerprint detection areas 202.

Optionally, in the embodiment of the present application, the technical solutions of the two second optical fingerprint identification modules 220 and the first optical fingerprint identification module 210 on two sides can be referred to the related descriptions of the embodiments shown in fig. 18 to fig. 20 above.

To newly-increased third second optics fingerprint identification module 220, it can be located between two second optics fingerprint identification modules 220 equally, when being convenient for increase user's single finger and press, the area of the fingerprint detection region that optics fingerprint identification device 200 corresponds further improves fingerprint detection performance.

Optionally, the third second optical fingerprint identification module 220 may be disposed on a side of the first optical fingerprint identification module 210 facing the top area of the display screen 120.

Optionally, the center of the second fingerprint detection area 202 corresponding to the third second optical fingerprint identification module 220 may also be located on the first straight line L, so that when the user presses the display screen 120 in the left and right directions, the first fingerprint detection area 201 and the third second fingerprint detection area 202 can both be used for receiving the fingerprint of the user. Of course, the embodiment of the present application is only an example and not a limitation, and in the embodiment shown in fig. 18 to 20, the newly added third optical fingerprint identification module may be the first optical fingerprint identification module 210, in addition to the second optical fingerprint identification module 220. Or except that the third optical fingerprint identification module is newly added, the optical fingerprint identification modules with more quantity can be newly added, and the embodiment of the application is not specifically limited to this.

Fig. 22 shows a schematic structural block diagram of an optical fingerprint identification device provided by an embodiment of the present application.

As shown in fig. 22, in the embodiment of the present application, in addition to the first optical fingerprint identification module 210 and the second optical fingerprint identification module 220, the optical fingerprint identification apparatus 200 may further include: a relay 230, the relay 230 comprising a plurality of input interfaces 231 and one output interface 231, the plurality of input interfaces 231 being adapted to receive the electrical signal of the first fingerprint sensor 212 and the electrical signal of the second fingerprint sensor 223, respectively, and the one output interface 231 being adapted to transmit the electrical signal of the first fingerprint sensor 112 and the electrical signal of the second fingerprint sensor 223 to the processing unit 170 of the electronic device.

Specifically, in the embodiment of the present application, since the optical fingerprint identification apparatus 200 includes a plurality of optical fingerprint identification modules, and the first optical fingerprint identification module 210 and the second optical fingerprint identification module 220 are separately disposed, the plurality of optical fingerprint identification modules need to transmit the electrical signals of their respective fingerprint sensors to the processing unit 170 through different interfaces, and optionally, the processing unit 170 includes but is not limited to a main control unit in an electronic device.

In order to simplify the interface design in the electronic device, in the embodiment of the present application, by providing the repeater 230, which includes a plurality of input interfaces 231 and an output interface 232, the electrical signals of a plurality of fingerprint sensors in a plurality of optical fingerprint identification modules can be received through the plurality of input interfaces 231, and connected to the processing unit 170 through the output interface 231 to transmit the electrical signals of the plurality of fingerprint sensors. Optionally, the repeater 230 may include a buffer unit therein, which may be used to buffer the electrical signals of the plurality of fingerprint sensors and transmit the electrical signals of the plurality of fingerprint sensors to the processing unit 170 at a suitable time, so as to improve the processing efficiency of the processing unit 170.

In a specific implementation, referring back to fig. 6 and 7, both the first optical fingerprint identification module 210 and the second optical fingerprint identification module 220 may include a flexible circuit board for electrically connecting the fingerprint sensor.

Fig. 23 shows a schematic structural block diagram of an optical fingerprint identification device provided in an embodiment of the present application.

Alternatively, as shown in fig. 23, the first flexible circuit board 214 in the first optical fingerprint identification module 210 may be connected to the first fingerprint sensor 212 and an input interface 231 of the repeater 230 for transmitting the electrical signal of the first fingerprint sensor 212. The second flexible circuit board 224 of the second optical fingerprint identification module 220 may be connected to the second fingerprint sensor 223 and another input interface 231 of the relay 230 for transmitting the electrical signal of the second fingerprint sensor 223.

Alternatively, in the case that the optical fingerprint identification apparatus 200 includes a plurality of first optical fingerprint identification modules 210 and/or a plurality of second optical fingerprint identification modules 220, for example, as shown in fig. 23, each first fingerprint sensor 212 in the plurality of first optical fingerprint identification modules 210 is connected to one input interface 231 in the repeater 230 through its respective first flexible circuit board 214, that is, the plurality of first fingerprint sensors 212 are connected to the plurality of input interfaces 231 of the repeater 230 through the plurality of first flexible circuit boards 224 in a one-to-one correspondence manner. However, the second fingerprint sensors 223 of the second optical fingerprint identification modules 220 may be disposed on the same second flexible circuit board 224, and the second fingerprint sensors 223 may be connected to the same input interface 231 of the repeater 230 through the same second flexible circuit board 224.

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.

The embodiment of the present application further provides an electronic device, which may include a display screen 120 and the optical fingerprint identification device 200 in any of the above application embodiments, wherein the optical fingerprint identification device 200 is disposed below the display screen 120 to implement optical fingerprint identification under the screen.

The electronic device may be any electronic device having a display screen. For example, the electronic device may be the electronic device 10 shown in fig. 1.

The display screen may be the display screen described above, such as an OLED display screen or other display screens, and for the description of the display screen, reference may be made to the description of the display screen in the above description, and for brevity, no further description is provided here.

In addition, the electronic device may further include a middle frame 150, a battery 160, and a processing unit 170. Specifically, the technical solutions related to the middle frame 150, the battery 160 and the processing unit 170 may refer to the related descriptions in the above embodiments, and are not described herein again.

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 (24)

1. An optical fingerprint recognition apparatus, wherein the optical fingerprint recognition apparatus is configured to be disposed below a display screen of an electronic device, the optical fingerprint recognition apparatus comprising:

the first optical fingerprint identification module comprises an optical lens and a first fingerprint sensor, wherein the first fingerprint sensor is arranged below the optical lens, the optical lens is used for reducing and imaging a first fingerprint pressed in a first fingerprint detection area in the display screen on the first fingerprint sensor, and the first fingerprint sensor is used for receiving the reduced image of the first fingerprint so as to detect the first fingerprint;

the second optical fingerprint identification module is arranged adjacent to the first optical fingerprint identification module and comprises a micro lens layer, at least one diaphragm layer and a second fingerprint sensor, wherein the micro lens layer comprises a plurality of micro lenses, the at least one diaphragm layer is arranged between the micro lens layer and the second fingerprint sensor, each diaphragm layer in the at least one diaphragm layer is provided with a plurality of light through holes, and is reflected or scattered by a second finger fingerprint of a second fingerprint detection area in the display screen through pressing, and a fingerprint optical signal converged by the micro lens layer is transmitted to the second fingerprint sensor through the light through holes so as to detect the second finger fingerprint.

2. The optical fingerprint identification device according to claim 1, wherein the first optical fingerprint identification module and the second optical fingerprint identification module are both disposed on a middle frame of the electronic apparatus;

wherein the middle frame is provided with an opening, and at least part of the first optical fingerprint identification module is positioned in the opening; the second optical fingerprint identification module is located the center is towards the surface of display screen.

3. The optical fingerprint identification device of claim 2, wherein a surface of the middle frame facing the display screen is provided with a groove, and the second optical fingerprint identification module is located in the groove.

4. The optical fingerprint identification device according to claim 1, wherein the first optical fingerprint identification module is located on one side of a battery of the electronic equipment in a direction parallel to the display screen;

in the direction of perpendicular to the display screen, the second optics fingerprint identification module is located the battery orientation one side of display screen.

5. The optical fingerprint identification device of claim 4, wherein the first optical fingerprint identification module is located on a side of the battery facing the bottom area of the display screen, and the second optical fingerprint identification module is disposed on a side of the first optical fingerprint identification module facing the top area of the display screen.

6. The optical fingerprint identification device according to any one of claims 1 to 5, wherein the first optical fingerprint identification module and the second optical fingerprint identification module are correspondingly disposed below a middle region or a middle-lower region of the display screen.

7. The optical fingerprint identification device according to any one of claims 1 to 5, wherein the first fingerprint detection area of the first optical fingerprint identification module and the second fingerprint detection area of the second optical fingerprint identification module are connected to each other.

8. The optical fingerprint identification device according to any one of claims 1 to 5, wherein a first edge of the first fingerprint detection area is adjacent to a first edge of the second optical fingerprint identification module;

a distance between a center of the first fingerprint detection area and a center of the second fingerprint detection area is (W)₁+W₂) 2-1mm to (W)₁+W₂) A/2 +2mm, wherein W₁Is the length of a second edge of the first fingerprint detection area perpendicular to its first edge, W₂Is the length of a second side of the second fingerprint detection area perpendicular to the first side of the second fingerprint detection area.

9. The optical fingerprint recognition device according to any one of claims 1 to 5, wherein the distance between the center of the first fingerprint detection area and the center of the second fingerprint detection area is (W)₁+W₂) 2-0.5mm to (W)₁+W₂) And/2 +0.5 mm.

10. The optical fingerprint recognition device according to any one of claims 1 to 5, wherein the first direction of the first fingerprint sensor has a first angle with the first direction of the display screen, wherein the first direction of the display screen is a direction parallel to the first side of the display screen, the first direction of the first fingerprint sensor is a direction parallel to the first side of the first fingerprint sensor, and the first angle is between 3 degrees and 17 degrees, or the first angle is between-3 degrees and-17 degrees.

11. The optical fingerprint recognition device according to any one of claims 1 to 5, wherein the first direction of the second fingerprint sensor has a second angle with the first direction of the display screen, wherein the first direction of the display screen is parallel to the first side of the display screen, the first direction of the second fingerprint sensor is parallel to the first side of the second fingerprint sensor, the second angle is between-15 degrees and 15 degrees, and the second angle is not equal to 0 degree.

12. The optical fingerprint recognition device according to any one of claims 1 to 5, wherein the optical fingerprint recognition device comprises: at least one first optics fingerprint identification module and at least one second optics fingerprint identification module.

13. The optical fingerprint recognition device of claim 12, wherein the optical fingerprint recognition device comprises: two first optics fingerprint identification module and at least one second optics fingerprint identification module, two of first optics fingerprint identification module first fingerprint detection area mutual noninterference and interconnect, at least one of second optics fingerprint identification module second fingerprint detection area connect in two the region that first fingerprint detection area formed.

14. The optical fingerprint recognition device of claim 12, wherein the optical fingerprint recognition device comprises: two second optics fingerprint identification module and at least one first optics fingerprint identification module, two of second optics fingerprint identification module two distance between the second fingerprint detection area is within 1mm, at least one of first optics fingerprint identification module first fingerprint detection area connect in two the region that second fingerprint detection area formed.

15. The optical fingerprint recognition device of claim 12, wherein the optical fingerprint recognition device comprises: two second optics fingerprint identification module and one first optics fingerprint identification module, two of second optics fingerprint identification module the center distance of second fingerprint detection area is between 20mm to 30mm, one first optics fingerprint identification module first fingerprint detection area is located two between the second fingerprint detection area.

16. The optical fingerprint identification device according to claim 15, wherein a center of the first fingerprint detection area of one of the first optical fingerprint identification modules is located on a first straight line, and the first straight line is a central axis of a central line connecting two of the second fingerprint detection areas.

17. The optical fingerprint recognition device of claim 12, wherein the optical fingerprint recognition device comprises: three second optics fingerprint identification module and one first optics fingerprint identification module is three in the second optics fingerprint identification module, two of second optics fingerprint identification module the central distance of second fingerprint detection area is between 20mm to 30mm, another one of second optics fingerprint identification module the second fingerprint detection area with one first optics fingerprint identification module the first fingerprint detection area is located two between the second fingerprint detection area.

18. The optical fingerprint recognition device according to any one of claims 1 to 5, further comprising:

and the repeater comprises a plurality of input interfaces and an output interface, the plurality of input interfaces are used for respectively receiving the electric signals of the first fingerprint sensor and the second fingerprint sensor, and the output interface is used for transmitting the electric signals of the first fingerprint sensor and the second fingerprint sensor to the processing unit of the electronic equipment.

19. The optical fingerprint identification device of claim 18 wherein the first optical fingerprint identification module further comprises: the first flexible circuit board is connected with the first fingerprint sensor and one input interface of the repeater and is used for transmitting the electric signal of the first fingerprint sensor;

first optics fingerprint identification module still includes: and the second flexible circuit board is connected to the second fingerprint sensor and the other input interface of the repeater and is used for transmitting the electric signal of the second fingerprint sensor.

20. The optical fingerprint recognition device according to any one of claims 1 to 5, wherein the optical fingerprint recognition device comprises: a plurality of the first optical fingerprint identification modules,

a plurality of in the first optics fingerprint identification module first fingerprint sensor sets up in same flexible circuit board.

21. The optical fingerprint recognition device according to any one of claims 1 to 5, wherein the area of the first fingerprint detection area is equal to or larger than 36mm²(ii) a And/or the presence of a gas in the gas,

the area of the second fingerprint detection area is 20mm²To 40mm²In the meantime.

22. The optical fingerprint identification device of any one of claims 1 to 5, wherein in the first optical fingerprint identification module, the optical lens comprises a plurality of optical lenses, the first optical fingerprint identification module further comprising: the lens barrel is used for accommodating the optical lenses, and the support is used for fixing the lens barrel and the first fingerprint sensor.

23. The optical fingerprint identification device according to any one of claims 1 to 5, wherein in the second optical fingerprint identification module, the second fingerprint sensor comprises an array of photosensitive cells, each microlens in the microlens layer corresponds to a plurality of photosensitive cells in the array of photosensitive cells;

between each micro lens and the corresponding multiple photosensitive units, the at least one diaphragm layer forms multiple light guide channels in different directions through light through holes, and the bottom of each light guide channel in the multiple light guide channels is correspondingly provided with one photosensitive unit;

and in the fingerprint optical signals which are reflected or scattered by the second finger fingerprint and converged by the micro lens, a plurality of target fingerprint optical signals in different directions are transmitted to the plurality of photosensitive units through the plurality of light guide channels in a one-to-one correspondence manner, and the plurality of target fingerprint optical signals are used for detecting the second finger fingerprint.

24. An electronic device, comprising: a display screen, and the optical fingerprint recognition device according to any one of claims 1 to 23, wherein said optical fingerprint recognition device is disposed below said display screen to achieve under-screen fingerprint recognition.

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