Optical fingerprint module and terminal

Abstract

The present invention discloses an optical fingerprint module and a terminal, wherein the optical fingerprint module comprises an optical lens assembly, an optical fingerprint recognition chip and a shooting chip, wherein the optical fingerprint recognition chip and the shooting chip can alternately pass through the imaging position of the optical lens assembly; and the terminal comprises the optical fingerprint module. The optical fingerprint module and the terminal realize the functional combination of fingerprint recognition and image shooting, enrich the functionality, break through the application scenario limitation of under-screen fingerprint recognition, are applicable to various electronic devices with cameras, and increase the scope of use.

Description

Technical Field

[0001] The present invention relates to the technical field of fingerprint modules, and in particular to an optical fingerprint module and a terminal. Background Art

[0002] As the trend of full-screen phones deepens, optical fingerprint recognition technology has regained attention and is widely used in mobile electronic devices. Existing optical fingerprint recognition technology only has the function of fingerprint collection and recognition, and can generally only be used for under-screen fingerprint recognition. It has a single function and a narrow scope of use. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides an optical fingerprint module and terminal, which realizes the functional combination of fingerprint recognition and image shooting, enriches the functionality, breaks through the application scenario limitations of under-screen fingerprint recognition, is suitable for various electronic devices with cameras, and increases the scope of use.

[0004] The optical fingerprint module provided by the embodiment of the present invention comprises an optical lens assembly, an optical fingerprint recognition chip and a photographing chip. The optical fingerprint recognition chip and the photographing chip can alternately pass through the imaging position of the optical lens assembly.

[0005] In some optional embodiments, the optical fingerprint module further includes a module housing, a lens mounting hole is provided on the module housing, and the optical lens assembly is mounted in the lens mounting hole.

[0006] In some optional embodiments, the optical fingerprint module also includes a switching drive device, which drives at least one of the optical fingerprint recognition chip and the shooting chip to move, so that the optical fingerprint recognition chip and the shooting chip alternately switch at the imaging position of the optical lens assembly.

[0007] In some optional embodiments, when only one of the optical fingerprint recognition chip and the shooting chip is movable, the movable one is connected to the motion output end of the switching drive device, and the stationary one is kept at a distance from the optical lens assembly along the axial direction of the optical lens assembly, and the movable one can be kept between the stationary one and the optical lens assembly or be withdrawn from the stationary one and the optical lens assembly; the optical lens assembly has an optical zoom characteristic.

[0008] In some optional embodiments, when the optical fingerprint recognition chip and the shooting chip move together, the optical fingerprint recognition chip and the shooting chip are respectively connected to the motion output ends of the switching drive device having the same output state.

[0009] In some optional embodiments, when the optical lens assembly has an optical fixed focus characteristic, the photosensitive area of ​​the optical fingerprint recognition chip and the photosensitive area of ​​the shooting chip remain coplanar with the focal plane of the optical lens assembly.

[0010] In some optional embodiments, the optical fingerprint recognition chip and the shooting chip are fixedly soldered on the same circuit board, and the circuit board is connected to the motion output end of the switching drive device.

[0011] In some optional embodiments, the circuit board has a U-shaped plate structure, the module housing has a notch, one end of the U-shaped plate structure is located inside the module housing, and the other end extends from the notch to outside the module housing, and there is a linear reciprocating motion between the U-shaped plate structure and the module housing.

[0012] In some optional embodiments, the motion output by the switching drive device is one of linear reciprocating motion, reciprocating swinging motion and circular motion.

[0013] In some optional embodiments, when the electronic device in which the optical fingerprint module is located remains locked, the optical fingerprint recognition chip remains at the imaging position of the optical lens assembly, and the shooting chip remains at a position other than the imaging position of the optical lens assembly.

[0014] In some optional embodiments, the optical fingerprint module also includes a transparent cover plate, and the transparent cover plate and the optical fingerprint recognition chip are separated on both sides of the optical lens assembly; the transparent cover plate covers a surface of the optical lens assembly away from the optical fingerprint recognition chip.

[0015] In some optional embodiments, the optical lens assembly includes an optical lens and a filter, and the filter is disposed between the optical lens and the imaging position.

[0016] The terminal provided by the embodiment of the present invention includes any one of the optical fingerprint modules described above.

[0017] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0018] An optical fingerprint recognition chip and a camera chip are integrated in the module, and the optical fingerprint recognition chip and the camera chip are configured to alternately pass through the imaging position of the optical lens assembly; when fingerprint recognition is required, the optical fingerprint recognition chip is kept at the imaging position of the optical lens assembly, the optical lens assembly forms an image of the fingerprint light on the optical fingerprint recognition chip, and the optical fingerprint recognition chip performs the fingerprint recognition function; when image capture is required, the camera chip enters the imaging position of the optical lens assembly, the optical lens assembly forms an image of the object light on the camera chip, and the camera chip performs the photography function;

[0019] While maintaining the original basic structure of the module, the above technical solution realizes the functional combination of fingerprint recognition and image shooting, enriches the functionality of the module, breaks through the application scenario limitations of under-screen fingerprint recognition, is suitable for various electronic devices with cameras, increases the scope of use, and the solution is easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic diagram of a first state of a first / third exemplary structure of an optical fingerprint module provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of a second state of the first / third exemplary structure of the optical fingerprint module provided by an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of a first state of a second exemplary structure of an optical fingerprint module provided by an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of a second state of a second exemplary structure of an optical fingerprint module provided by an embodiment of the present invention;

[0025] Figure 5 A schematic diagram of the structure of a terminal provided by an embodiment of the present invention.

[0026] Description of main component symbols:

[0027] T-optical fingerprint module, 11-optical lens, 12-filter, 2-optical fingerprint recognition chip, 3-shooting chip, 41-first bracket, 42-second bracket, 43-lens mounting hole, 44-notch, 5-switching drive device, 6-circuit board, 7-circuit reinforcement plate, 8-transparent cover, U-terminal. DETAILED DESCRIPTION

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention pertains. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Please refer to Figures 1 to 4 This embodiment discloses a specific structure of an optical fingerprint module T, including an optical lens assembly, an optical fingerprint recognition chip 2 and a shooting chip 3, so as to realize the combination of fingerprint recognition and image shooting functions.

[0031] The optical fingerprint recognition chip 2 and the camera chip 3 can alternately pass through the imaging position of the optical lens assembly to respectively perform fingerprint recognition and image capturing functions. In other words, at any time, only one of the optical fingerprint recognition chip 2 and the camera chip 3 is located at the imaging position of the optical lens assembly, so that the image formed by the optical lens 11 falls on the chip located at the imaging position.

[0032] It is understood that the chip located at the aforementioned imaging position (i.e., the optical fingerprint recognition chip 2 or the camera chip 3) is directly opposite to the optical lens assembly at the same time, and can achieve the purpose of light sensing without any obstruction. It is also understood that when the optical lens assembly is optically zoomable, its imaging position can be different at different times.

[0033] When fingerprint identification is required, the optical fingerprint identification chip 2 remains at the imaging position of the optical lens assembly, the optical lens assembly forms an image of the fingerprint light on the optical fingerprint identification chip 2, and the optical fingerprint identification chip 2 performs the fingerprint identification function; when image capture is required, the optical fingerprint identification chip 2 leaves the imaging position of the optical lens assembly, the shooting chip 3 enters the imaging position of the optical lens assembly, the optical lens assembly forms an image of the object light on the shooting chip 3, and the shooting chip 3 performs the photography function.

[0034] It can be understood that the optical fingerprint recognition chip 2 and the shooting chip 3 respectively have a photosensitive area (composed of photosensitive elements), which converts the light image on the photosensitive surface into an electrical signal in a corresponding proportional relationship with the light image, thereby acquiring an image signal.

[0035] Exemplarily, the optical fingerprint module T further includes a module housing for containing the optical lens assembly, the optical fingerprint recognition chip 2 and the camera chip 3. The module housing is provided with a lens mounting hole 43, and the optical lens assembly is mounted in the lens mounting hole 43. External light enters the optical lens assembly from the lens mounting hole 43, and forms an image after passing through the optical lens assembly. Exemplarily, the module housing is formed by bonding a first bracket 41 and a second bracket 42. The lens mounting hole 43 is provided on the first bracket 41.

[0036] Exemplarily, the optical lens assembly includes an optical lens 11 and a filter 12, wherein the filter 12 is disposed between the optical lens 11 and the imaging position. The optical lens 11 may be a fixed-focus lens or a zoom lens.

[0037] Exemplarily, the optical fingerprint module T further includes a switching driving device 5, which drives at least one of the optical fingerprint recognition chip 2 and the camera chip 3 to move, so that the optical fingerprint recognition chip 2 and the camera chip 3 alternately switch at the imaging position of the optical lens assembly. That is, the switching driving device 5 outputs movement to at least one of the optical fingerprint recognition chip 2 and the camera chip 3.

[0038] The motion form output by the switching device is determined according to the actual application configuration. For example, the motion output by the switching drive device 5 is one of linear reciprocating motion, reciprocating swinging motion and circular motion. For example, linear reciprocating motion can be realized by linear guide rails, electric push rods, telescopic cylinders, etc., reciprocating swinging motion can be realized by swinging motors, etc., and circular motion can be realized by rotating motors, hydraulic motors, etc.

[0039] This alternating configuration can be achieved through different structural methods, which are briefly introduced below.

[0040] Please refer to Figures 1-2 In the first exemplary structure, only one of the optical fingerprint recognition chip 2 and the shooting chip 3 is movable to achieve the position alternation between the two. The moving chip is connected to the motion output end of the switching driving device 5, and the stationary chip is arranged to be spaced apart from the optical lens assembly along the axial direction of the optical lens assembly. The moving chip can move with the motion output end of the switching driving device 5, so that it has the following two states: either it is kept between the stationary chip and the optical lens assembly, or it is pulled away from the stationary chip and the optical lens assembly.

[0041] When the stationary object needs to be put into use, the moving object is moved away from between the stationary object and the optical lens assembly, so that the stationary object and the optical lens assembly remain directly opposite to each other, the optical lens assembly is imaged on the stationary object, and image information is obtained by the stationary object sensing light.

[0042] When the mover needs to be put into use, the mover is kept between the stationary object and the optical lens assembly, so that the mover and the optical lens assembly are kept directly opposite, the optical lens assembly is imaged on the mover, and the mover is used to sense light to obtain image information. At this time, the optical lens assembly, the mover and the stationary object are arranged in sequence along the axial direction of the optical lens assembly.

[0043] It can be understood that when the moving object is the optical fingerprint recognition chip 2, the stationary object is the photographing chip 3; conversely, when the stationary object is the optical fingerprint recognition chip 2, the moving object is the photographing chip 3. At any time, the moving object has the ability to move, while the stationary object always remains stationary.

[0044] Exemplarily, in this exemplary configuration, the optical lens assembly has an optical zoom feature to meet the photosensitive needs of the moving person and the stationary person distributed in front and behind. Specifically, when the stationary person needs to be put into use, the optical lens assembly forms an image on the stationary person with a first focal length; when the moving person needs to be put into use, the optical lens assembly zooms from the first focal length to a second focal length and forms an image on the moving person with the second focal length. The first focal length and the second focal length are different focal lengths, corresponding to different zoom multiples.

[0045] Please refer to Figures 3-4 In the second exemplary structure, the optical fingerprint recognition chip 2 and the shooting chip 3 move as one to achieve the position alternation between the two. The optical fingerprint recognition chip 2 and the shooting chip 3 are respectively connected to the motion output ends of the switching drive device 5 with the same output state, ensuring that the optical fingerprint recognition chip 2 and the shooting chip 3 move synchronously in the same motion state. Driven by the switching drive device 5, the optical fingerprint recognition chip 2 and the shooting chip 3 move synchronously, so that at any time, one of the optical fingerprint recognition chip 2 and the shooting chip 3 is in the imaging position of the optical lens assembly.

[0046] Exemplarily, in this exemplary structure: when the optical lens assembly has an optical zoom characteristic, the photosensitive area of ​​the optical fingerprint recognition chip 2 and the photosensitive area of ​​the shooting chip 3 are arranged front and back to adapt to the different focal lengths of the optical lens assembly and achieve different image acquisition purposes; when the optical lens assembly has an optical fixed focus characteristic, the photosensitive area of ​​the optical fingerprint recognition chip 2 and the photosensitive area of ​​the shooting chip 3 remain coplanar with the focal plane of the optical lens assembly.

[0047] For example, in this exemplary structure, the optical fingerprint recognition chip 2 and the camera chip 3 are fixedly soldered on the same circuit board 6, and the circuit board 6 is connected to the motion output end of the switching drive device 5, and the circuit board 6 drives the optical fingerprint recognition chip 2 and the camera chip 3 to move synchronously. This structure has at least the following functions: fully utilizing the internal space of the module, using the circuit board 6 as a transmission part, avoiding the use of additional transmission parts, improving integration and saving material costs.

[0048] Exemplarily, the circuit board 6 has a U-shaped plate structure. Correspondingly, the module housing has a notch 44, one end of the U-shaped plate structure is located inside the module housing, and the other end extends from the notch 44 to the outside of the module housing to achieve external circuit connection, and there is a linear reciprocating motion between the U-shaped plate structure and the module housing, and the optical fingerprint recognition chip 2 and the shooting chip 3 are fixedly welded on the surface of one end of the U-shaped plate structure located inside the module housing. For example, the open end of the U-shaped plate structure is sleeved on one side wall of the notch 44 and slides on the surface of the side wall. Exemplarily, the notch 44 is kept opposite to the wall surface where the lens mounting hole 43 is located. Exemplarily, a circuit reinforcement plate 7 is provided at one end of the U-shaped plate structure located inside the module housing, and the circuit reinforcement plate 7 is in contact with the module housing (which can be specifically the surface of the side wall).

[0049] Please refer to Figures 1-2 In the third exemplary structure, the optical fingerprint recognition chip 2 and the camera chip 3 have independent movements and are distributed according to the following position rules: the optical lens 11 module, the optical fingerprint recognition chip 2 and the camera chip 3 are arranged in sequence along the axial direction of the optical lens 11 module, or the optical lens 11 module, the camera chip 3 and the optical fingerprint recognition chip 2 are arranged in sequence along the axial direction of the optical lens 11 module. The difference between this exemplary structure and the first exemplary structure is that the stationary one is replaced by another moving one, and the other action processes are similar to those of the first exemplary structure, which will not be repeated here.

[0050] Exemplarily, the optical fingerprint module T further includes a transparent cover plate 8. The transparent cover plate 8 and the optical fingerprint recognition chip 2 are separated on both sides of the optical lens assembly, and the transparent cover plate 8 is in direct contact with the user's finger, thereby providing safety protection for the optical lens assembly. Exemplarily, the transparent cover plate 8 covers the surface of one side of the optical lens assembly away from the optical fingerprint recognition chip 2.

[0051] See also Figure 5 This embodiment also discloses a specific structure of a terminal U, including the above optical fingerprint module T. The terminal U can be a mobile phone, a tablet computer, a laptop computer or other electronic devices, and the optical fingerprint module T serves as both optical fingerprint recognition and shooting functions. In electronic devices with only a camera, the optical fingerprint module T can directly replace the camera to achieve composite functions, breaking through the application scenario limitations of under-screen fingerprint recognition.

[0052] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. The optical fingerprint module is characterized by: It includes an optical lens assembly, an optical fingerprint recognition chip and a camera chip, wherein the optical fingerprint recognition chip and the camera chip can alternately pass through the imaging position of the optical lens assembly; The present invention also includes a switching drive device, which drives at least one of the optical fingerprint recognition chip and the shooting chip to move so that the optical fingerprint recognition chip and the shooting chip are alternately switched at the imaging position of the optical lens assembly. The present invention also includes a module housing, on which a lens mounting hole is provided, and the optical lens assembly is mounted in the lens mounting hole.

2. The optical fingerprint module according to claim 1, characterized in that: When only one of the optical fingerprint recognition chip and the shooting chip is movable, the movable one of the two is connected to the motion output end of the switching drive device, and the stationary one is kept apart from the optical lens assembly along the axial direction of the optical lens assembly, and the movable one can be kept between the stationary one and the optical lens assembly or be withdrawn from between the stationary one and the optical lens assembly; the optical lens assembly has an optical zoom characteristic.

3. The optical fingerprint module according to claim 1, characterized in that: When the optical fingerprint recognition chip and the photographing chip move together, the optical fingerprint recognition chip and the photographing chip are respectively connected to the motion output ends of the switching drive device having the same output state.

4. The optical fingerprint module according to claim 3, characterized in that: When the optical lens assembly has an optical fixed focus characteristic, the photosensitive area of ​​the optical fingerprint recognition chip and the photosensitive area of ​​the shooting chip remain coplanar with the focal plane of the optical lens assembly.

5. The optical fingerprint module according to claim 3, characterized in that: The optical fingerprint recognition chip and the camera chip are fixedly soldered on the same circuit board, and the circuit board is connected to the motion output end of the switching drive device; The circuit board has a U-shaped plate structure, and the optical fingerprint module includes a module shell with a notch. One end of the U-shaped plate structure is located inside the module shell, and the other end extends from the notch to the outside of the module shell. There is a linear reciprocating motion between the U-shaped plate structure and the module shell.

6. The optical fingerprint module according to claim 1, characterized in that: The motion output by the switching drive device is one of linear reciprocating motion, reciprocating swinging motion and circular motion.

7. The optical fingerprint module according to claim 1, characterized in that: It also includes a transparent cover plate, which is separated from the optical fingerprint recognition chip on both sides of the optical lens assembly; the transparent cover plate covers a surface of the optical lens assembly away from the optical fingerprint recognition chip.

8. A terminal, characterized in that The optical fingerprint module comprises any one of claims 1 to 7.

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