Fingerprint acquisition device

Abstract

A fingerprint acquisition device comprises: a housing; the first fingerprint acquisition instrument is positioned on the first side surface of the shell; the second fingerprint acquisition instrument is located on the second side face of the shell, and the second side face and the first side face are arranged in a back-to-back mode; and the third fingerprint acquisition instrument is positioned on a third side surface of the shell, and the third side surface is positioned between the first side surface and the second side surface. According to the fingerprint acquisition equipment, the plurality of fingerprint acquisition instruments are arranged on different side surfaces of the shell, fingerprints of two hands can be acquired at the same time, the fingerprint acquisition efficiency can be effectively improved, different fingerprint acquisition instruments acquire fingerprints of different fingers, the area of each fingerprint acquisition instrument does not need to be very large, and the cost of the fingerprint acquisition equipment can be effectively controlled.

Description

Technical Field

[0001] This utility model relates to the field of fingerprint recognition, and in particular to a fingerprint acquisition device. Background Technology

[0002] Fingerprint recognition technology captures images of a person's fingerprints using a fingerprint imaging module, then compares them with existing fingerprint images in the fingerprint recognition system to identify the individual. Due to its ease of use and the uniqueness of human fingerprints, fingerprint recognition technology has been widely applied in various fields, such as security checks in police stations and customs, building access control systems, and consumer products like personal computers and mobile phones.

[0003] Fingerprint recognition technology employs various imaging techniques, including optical, capacitive, and ultrasonic imaging modules. One such technique involves using an optical imaging module to capture the fingerprint image. The working principle of an optical fingerprint imaging module is as follows: When a finger is pressed against the protective cover of the module, light emitted from a light source forms incident light. This incident light passes through the image sensor and the protective cover before being projected onto the interface between the cover and the finger. Reflection and refraction occur at the point of contact between the finger and the cover. The image sensor collects this reflected light, converts the optical signal into an electrical signal, and processes it to obtain the fingerprint image.

[0004] With the widespread application of fingerprint recognition technology, more and more scenarios require the collection of fingerprints from both hands. However, fingerprint collection devices often need to perform multiple collections, resulting in low fingerprint enrollment efficiency. Summary of the Invention

[0005] The problem this invention solves is how to improve the efficiency of fingerprint collection in an economical way during the process of collecting fingerprints from both hands.

[0006] To address the above problems, this utility model provides a fingerprint acquisition device, comprising:

[0007] The housing includes: a first fingerprint scanner located on a first side of the housing; a second fingerprint scanner located on a second side of the housing, the second side being opposite to the first side; and a third fingerprint scanner located on a third side of the housing, the third side being located between the first side and the second side.

[0008] Optionally, the housing further has a top surface and a bottom surface; the side surface of the housing is connected between the top surface and the bottom surface, wherein the side surface of the housing includes: a first side surface, a second side surface and a third side surface.

[0009] Optionally, at least the angle between a portion of the third side of the third fingerprint scanner and the direction of the normal to the bottom surface is set to be in the range of 0° to 45°.

[0010] Optionally, at least the angle between a portion of the third side surface of the third fingerprint scanner and the direction of the normal to the bottom surface is set to be within the range of 10° to 20°.

[0011] Optionally, the fingerprint acquisition window of the third fingerprint acquisition device extends in a direction parallel to the bottom surface.

[0012] Optionally, the size of the acquisition window of the third fingerprint collector is greater than 50mm in the direction parallel to the bottom surface.

[0013] Optionally, in a plane parallel to the bottom surface, the first side and the second side are symmetrically arranged on both sides of the third side.

[0014] Optionally, in a plane parallel to the top surface, the included angle between the first side surface and the third side surface is a first included angle, and the included angle between the second side surface and the third side surface is a second included angle; the first included angle and the second included angle are equal.

[0015] Optionally, at least one of the first included angle and the second included angle is in the range of 45° to 90°.

[0016] Optionally, at least one of the first included angle and the second included angle is in the range of 70° to 80°.

[0017] Optionally, the acquisition window of at least one of the first and second fingerprint acquisition devices extends along the direction of the normal to the bottom surface.

[0018] Optionally, along the direction of the normal to the bottom surface, the size of the acquisition window of at least one of the first and second fingerprint acquisition devices is greater than 80 mm.

[0019] Optionally, at least one of the first fingerprint scanner, the second fingerprint scanner, and the third fingerprint scanner is an ultra-thin fingerprint scanner.

[0020] Optionally, the ultra-thin fingerprint scanner includes a backlight and a sensor, wherein the backlight is located on the side of the sensor facing away from the contact surface.

[0021] Optionally, the backlight and the sensor are stacked.

[0022] Optionally, the light generated by the backlight is reflected and transmitted through the contact surface to form signal light; the sensor receives the signal light.

[0023] Optionally, the ultra-thin fingerprint scanner further includes a collimator located on the side of the sensor facing away from the backlight.

[0024] Optionally, a power supply interface and a data transmission interface are provided on the fourth side of the housing, wherein the fourth side is disposed opposite to the third side.

[0025] Compared with the prior art, the technical solution of this utility model has the following advantages:

[0026] In this utility model's technical solution, a first fingerprint collector, a second fingerprint collector, and a third fingerprint collector are respectively disposed on the first, second, and third sides of the housing. The first and second fingerprint collectors are located on the opposite sides of the first and second sides, respectively, and can be used to collect the fingerprints of four fingers (index, middle, ring, and little fingers) of both hands. The third fingerprint collector is located in the third layer between the first and second sides and can be used to collect the fingerprints of both thumbs. By disposing of multiple fingerprint collectors on different sides of the housing, fingerprints of both hands can be collected simultaneously, effectively improving fingerprint collection efficiency. Moreover, different fingerprint collectors collect fingerprints of different fingers, and the area of ​​each fingerprint collector does not need to be particularly large, effectively controlling the cost of the fingerprint collection device. Attached Figure Description

[0027] Figure 1 This is a three-dimensional schematic diagram from one angle in some embodiments of the fingerprint collection device of this utility model;

[0028] Figure 2 This is a three-dimensional schematic diagram from another angle of some embodiments of the fingerprint acquisition device of this utility model;

[0029] Figure 3 This is a top view schematic diagram of some embodiments of the fingerprint acquisition device of this utility model;

[0030] Figure 4 These are some embodiments of the fingerprint acquisition device of this utility model. Figure 3 Schematic diagram of the structure in direction A;

[0031] Figure 5 These are some embodiments of the fingerprint acquisition device of this utility model. Figure 3 Schematic diagram of the structure in the B direction;

[0032] Figure 6 This is a cross-sectional structural diagram of an ultra-thin fingerprint collector in some embodiments of the fingerprint collection device of this utility model. Detailed Implementation

[0033] As can be seen from the background technology, existing fingerprint collection devices often suffer from problems such as high collection frequency and low input efficiency.

[0034] Specifically, in fingerprint collection devices that collect fingerprints from both hands, the area of ​​the collection window is increased to achieve the one-time collection of fingerprints from multiple fingers (usually four fingers); however, when collecting fingerprints from both hands, it is often necessary to collect fingerprints from all ten fingers of both hands through at least three collections, namely, collecting four fingers of the left hand, four fingers of the right hand, and both thumbs.

[0035] To solve the aforementioned technical problem, this utility model provides a fingerprint acquisition device, comprising:

[0036] The housing includes: a first fingerprint scanner located on a first side of the housing; a second fingerprint scanner located on a second side of the housing, the second side being opposite to the first side; and a third fingerprint scanner located on a third side of the housing, the third side being located between the first side and the second side.

[0037] This utility model's technical solution involves placing multiple fingerprint collectors on different sides of the housing, enabling simultaneous collection of fingerprints from both hands. This effectively improves fingerprint collection efficiency, and since different fingerprint collectors collect fingerprints from different fingers, the area of ​​each fingerprint collector does not need to be particularly large, thus effectively controlling the cost of the fingerprint collection device.

[0038] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0039] refer to Figure 1 and Figure 2 ,in Figure 1 This is a three-dimensional schematic diagram from one angle of some embodiments of the fingerprint collection device of this utility model. Figure 2 This is a three-dimensional schematic diagram from another angle in some embodiments of the fingerprint acquisition device of this utility model.

[0040] The fingerprint acquisition device includes: a housing 10; a first fingerprint collector 111 located on a first side 110 of the housing 10; a second fingerprint collector 121 located on a second side 120 of the housing 10, the second side 120 being disposed opposite to the first side 110; and a third fingerprint collector 133 located on a third side 130 of the housing 10, the third side 130 being situated between the first side 110 and the second side 120.

[0041] The technical solution of the embodiment of the two-handed fingerprint collection device is described in detail below with reference to the accompanying drawings.

[0042] The housing 10 is used to house various components of the fingerprint acquisition device.

[0043] Specifically, the shell 10 is polyhedral. For example... Figure 1 and Figure 2 In some embodiments shown, the housing 10 has a bottom surface, a top surface 101 and a plurality of side surfaces disposed opposite to each other, the plurality of side surfaces being connected between the top surface 101 and the bottom surface.

[0044] Among them, the plurality of said sides include: a first side 110 (e.g. Figure 1 (as shown), second side 120 (as shown) Figure 2 (as shown) and the third side 130. Specifically, as shown... Figure 1 and Figure 2 As shown, in some embodiments, the first side 110 and the second side 120 are disposed opposite to each other, and the third side 130 is located between the first side 110 and the second side 120; for example, the third side 130 is connected between the first side 110 and the second side 120.

[0045] The first fingerprint collector 111 and the second fingerprint collector 121 are used to collect the fingerprints of four fingers of the left and right hands.

[0046] Specifically, the first fingerprint scanner 111 and the second fingerprint scanner 121 are respectively disposed on the first side 110 and the second side 120; therefore, the acquisition window 112 of the first fingerprint scanner 111 (e.g., Figure 1 (as shown) and the acquisition window 122 of the second fingerprint collector 121 (as shown) Figure 2 (As shown) opposite settings.

[0047] In some embodiments of this utility model, at least one of the first fingerprint collector 111 and the second fingerprint collector 121 is a four-fingerprint collector; the collection window of at least one of the first fingerprint collector 111 and the second fingerprint collector 121 extends along the direction z of the normal of the bottom surface, so that the collection window is sufficient to accommodate the fingerprints of four fingers (index finger, middle finger, ring finger, and little finger). Specifically, as follows... Figure 1 and Figure 2 As shown, the acquisition window 112 of the first fingerprint acquisition device 111 and the acquisition window 122 of the second fingerprint acquisition device 121 both extend along the direction z of the normal to the bottom surface.

[0048] In some embodiments, along the direction z of the normal to the bottom surface, the size of the acquisition window of at least one of the fingerprint acquisition devices 111 and 121 is greater than 80 mm. Specifically, along the direction z of the normal to the bottom surface, the size of the acquisition window 112 of the first fingerprint acquisition device 111 and the acquisition window 122 of the second fingerprint acquisition device 121 are both greater than 80 mm.

[0049] It should be noted that at least one of the first fingerprint collector 111 and the second fingerprint collector 121 is a quad fingerprint collector, and the acquisition window of the quad fingerprint collector is at least 76.2mm × 81.28mm.

[0050] The third fingerprint collector 130 is used to collect fingerprints from the thumbs of both hands.

[0051] Specifically, the third fingerprint scanner 133 is disposed on the third side, and the orientation of the scanning window of the third fingerprint scanner 133 is the same as that of the scanning window 112 of the first fingerprint scanner 111 (e.g., ...). Figure 1 The orientation of the fingerprint scanner 121 (as shown), and the acquisition window 122 of the second fingerprint scanner 121 (as shown) Figure 2 The orientations shown are all different.

[0052] In some embodiments of this invention, the collection window 134 of the third fingerprint collector 133 extends in a direction parallel to the bottom surface. Specifically, along the direction of the intersection of the third side surface 130 and the plane parallel to the bottom surface, the collection window 134 of the third fingerprint collector 133 extends to a predetermined length, so that the collection window 134 is sufficient to accommodate the thumbs of both hands.

[0053] In some specific embodiments, the size of the acquisition window 134 of the third fingerprint scanner 133 is greater than 50 mm in the direction parallel to the bottom surface. For example, the size of the acquisition window 134 of the third fingerprint scanner 133 can be 40.64 mm × 50.8 mm.

[0054] The first fingerprint scanner 111, the second fingerprint scanner 121, and the third fingerprint scanner 133 are arranged in a three-dimensional manner around the normal direction z of the bottom surface, which is adapted to the clenched hand posture. All fingers of the left and right hands can simultaneously contact the collection windows of the first fingerprint scanner 110, the second fingerprint scanner 121, and the third fingerprint scanner 130. That is, the four fingers of the left hand, the four fingers of the right hand, and the thumbs of both hands can simultaneously contact the collection windows of the first fingerprint scanner 110, the second fingerprint scanner 121, and the third fingerprint scanner 130, respectively, thereby realizing the one-time collection of fingerprints from both hands, which can effectively improve the fingerprint enrollment efficiency.

[0055] Furthermore, the three-dimensional distribution of the first fingerprint collector 110, the second fingerprint collector 121, and the third fingerprint collector 130 can effectively reduce the bottom area of ​​the fingerprint collection device, which is beneficial for controlling the area of ​​the plane occupied by the fingerprint collection device.

[0056] Furthermore, the first fingerprint scanner 111, the second fingerprint scanner 121, and the third fingerprint scanner 133 each come into contact with different fingers. The areas of the first fingerprint scanner 110, the second fingerprint scanner 121, and the third fingerprint scanner 130 do not need to be particularly large, and the components of the first fingerprint scanner 110, the second fingerprint scanner 121, and the third fingerprint scanner 130 are not expensive, which allows for better control of the overall cost of the fingerprint acquisition device.

[0057] Reference Figure 3 The diagram shows a top view of some embodiments of the fingerprint acquisition device of this utility model.

[0058] In some embodiments of this utility model, in a plane parallel to the bottom surface, the first side surface 110 and the second side surface 120 are symmetrically arranged on both sides of the third side surface 130. The symmetrical arrangement of the first side surface 110 and the second side surface 120 ensures that the collection window 112 of the first fingerprint collector 110 and the collection window 122 of the second fingerprint collector 121 are symmetrically arranged to fit the left and right hand clasping posture.

[0059] In some specific embodiments, within the top surface 101, the included angle between the first side surface 110 and the third side surface (i.e., the first portion 131 of the third side surface 130) is a first included angle β1, and the included angle between the second side surface 120 and the third side surface 130 is a second included angle β2; the first included angle β1 and the second included angle β2 are equal. Setting the first included angle β1 and the second included angle β2 equal makes the first side surface 110 and the second side surface 120 symmetrically arranged.

[0060] In some embodiments of the example, at least one of the first included angle β1 and the second included angle β2 is in the range of 45° to 90°. Preferably, at least one of the first included angle β1 and the second included angle β2 is in the range of 70° to 80°. The appropriate angles of the first included angle β1 and the second included angle β2 can better fit the angle between the four fingers and the thumb when the fingers are clenched, which helps to reduce fingerprint deformation and improve the accuracy of fingerprint acquisition.

[0061] In some embodiments of this invention, the third side surface 130 is a bent surface, and the angle between the direction z of the normal to the bottom surface and different parts of the third side surface 130 is not the same. Specifically, at least some parts of the third side surface 130 of the third fingerprint collector 133 are provided with an angle α between 0° and 45° with the direction z of the normal to the bottom surface.

[0062] Preferably, at least a portion of the third side surface 130 of the third fingerprint scanner 133 is provided with an angle α between 10° and 20° between it and the direction z of the normal to the bottom surface. Properly setting the angle α between the portion of the third side surface 130 of the third fingerprint scanner 133 and the direction z of the normal to the bottom surface allows for better fit of the thumbs when the left and right hands are clenched, which helps reduce fingerprint deformation and improves the accuracy of fingerprint acquisition.

[0063] Reference Figure 4 This illustrates some embodiments of the fingerprint acquisition device of this utility model. Figure 3 A schematic diagram of the structure in direction A.

[0064] Specifically, such as Figure 4 As shown, the third side surface 130 is a folded surface. The third side surface 130 includes a first part 131 and a second part 132. The first part 131 and the second part 132 are respectively planes. The third fingerprint collector 133 is disposed on the first part 131. The angle between the first part 131 and the direction z of the normal of the bottom surface is within a preset range so as to fit the thumbs of the left and right hands when they are clenched together.

[0065] It should be noted that, as Figure 4 As shown, the second portion 132 of the third side surface 130 is located between the first portion 131 and the bottom surface, connecting the first portion 131 and the bottom surface. Specifically, the angle between the second portion 132 of the third side surface 130 and the direction z of the normal to the bottom surface is smaller than the angle α between the third side surface 131 of the first portion 131 and the direction z of the normal to the bottom surface. For example, the second portion 132 of the third side surface 130 is parallel to the direction z of the normal to the bottom surface, that is, the second portion 132 of the third side surface 130 is perpendicular to the bottom surface.

[0066] Reference Figure 5 This illustrates some embodiments of the fingerprint acquisition device of this utility model. Figure 3 A schematic diagram of the structure in the B direction.

[0067] In some embodiments of this invention, the housing 10 further has a fourth side surface 140, which is disposed opposite to the third side surface 130. A power supply interface 141 and a data transmission interface 142 are provided on the fourth side surface 140. Providing interfaces on the side surface (i.e., the fourth side surface 140) in the direction z normal to the bottom surface effectively utilizes the spatial position of the housing and better controls the area occupied by the fingerprint collection device.

[0068] In some embodiments of this utility model, at least one of the first fingerprint collector 111, the second fingerprint collector 121, and the third fingerprint collector 133 is an ultra-thin fingerprint collector. Setting the first fingerprint collector 111, the second fingerprint collector 121, and the third fingerprint collector 133 as ultra-thin fingerprint collectors can better reduce the number of internal components of the fingerprint collection device, which is beneficial for controlling the size of the fingerprint collection device and its integration level.

[0069] Reference Figure 6 The diagram shows a cross-sectional view of an ultra-thin fingerprint scanner in some embodiments of the fingerprint scanner of this invention.

[0070] In some embodiments, the ultra-thin fingerprint scanner is an optical fingerprint scanner, which includes a backlight 601 and a sensor 602, wherein the backlight 601 is located on the side of the sensor 602 that faces away from the contact surface 603.

[0071] In some embodiments, the light generated by the backlight 601 is reflected and transmitted through the contact surface 603 to form signal light; the sensor 602 receives the signal light to perform fingerprint acquisition.

[0072] Specifically, such as Figure 6 As shown, when finger 60 contacts the contact surface 603, the fingerprint ridge directly contacts the contact surface 603, and the total internal reflection condition of the contact surface 603 at the corresponding position is destroyed. The light generated by the backlight 601 is refracted at the corresponding position and emitted from the contact surface 603. The fingerprint valley separates from the contact surface 603, and the total internal reflection condition of the contact surface 603 at the corresponding position is maintained. The light generated by the backlight 601 undergoes total internal reflection at the corresponding position to form signal light. The sensor 602 receives the signal light formed by the reflection at the corresponding positions of the fingerprint ridge and fingerprint valley, performs photoelectric conversion, and converts it into a fingerprint image after subsequent circuitry and image processing for presentation.

[0073] Specifically, such as Figure 6As shown, the backlight 601 and the sensor 602 are stacked to achieve an ultra-thin fingerprint scanner. For example, the backlight 601 is a surface light source, and it is attached to the surface of the sensor 602 facing away from the contact surface 603 using adhesive 608.

[0074] In some embodiments, the ultra-thin fingerprint scanner further includes a collimator 604 located on the side of the sensor 602 facing away from the backlight 601. The surface of the collimator 604 facing away from the sensor 602 is a contact surface 603 for finger contact. Specifically, the collimator 604 is attached to the surface of the sensor 602 facing away from the backlight 601 by an adhesive layer 605 (e.g., optical adhesive or glue).

[0075] It should be noted that the ultra-thin fingerprint scanner also includes a circuit board 606, which is connected to the sensor 602 via a flexible circuit board 607. Specifically, one end of the flexible circuit board 607 is attached to the surface of the sensor 602 facing away from the backlight 601, the flexible circuit board 607 is bent to the side of the backlight 601 facing away from the sensor 602, and the other end of the flexible circuit board 607 is attached to the circuit board 606.

[0076] In summary, by placing multiple fingerprint scanners on different sides of the housing, fingerprints from both hands can be collected simultaneously, effectively improving fingerprint collection efficiency. Moreover, since different fingerprint scanners collect fingerprints from different fingers, the area of ​​each fingerprint scanner does not need to be particularly large, which can effectively control the cost of the fingerprint collection device.

[0077] Although the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A fingerprint acquisition device, characterized by The application relates to a fingerprint collection device. The device comprises: a housing; a first fingerprint collection instrument located on a first side of the housing; a second fingerprint collection instrument located on a second side of the housing, the second side being opposite to the first side; 2. The fingerprint acquisition apparatus of claim 1, wherein, a third fingerprint collection instrument located on a third side of the housing, the third side being between the first side and the second side.

3. The fingerprint acquisition apparatus of claim 2, wherein, The housing further comprises a top surface and a bottom surface, and the sides of the housing are connected between the top surface and the bottom surface, wherein the sides of the housing comprise the first side, the second side and the third side.

4. The fingerprint acquisition apparatus of claim 3, wherein, An included angle between a part of the third side where the third fingerprint collection instrument is located and a normal direction of the bottom surface is within a range of 0-45 degrees.

5. The fingerprint acquisition apparatus of claim 2, wherein, An included angle between a part of the third side where the third fingerprint collection instrument is located and a normal direction of the bottom surface is within a range of 10-20 degrees.

6. The fingerprint acquisition apparatus of claim 5, wherein, A collection window of the third fingerprint collection instrument extends in a direction parallel to the bottom surface.

7. The fingerprint acquisition apparatus of claim 2, wherein, In the direction parallel to the bottom surface, the size of the collection window of the third fingerprint collection instrument is greater than 50 mm.

8. The fingerprint acquisition apparatus of claim 2 or 7, wherein, In a plane parallel to the bottom surface, the first side and the second side are symmetrically arranged on both sides of the third side. In a plane parallel to the top surface, an included angle between the first side and the third side is a first included angle, and an included angle between the second side and the third side is a second included angle.

9. The fingerprint acquisition apparatus of claim 8, wherein, The first included angle is equal to the second included angle.

10. The fingerprint acquisition apparatus of claim 9, wherein, At least one of the first included angle and the second included angle is within a range of 45-90 degrees.

11. The fingerprint acquisition apparatus of claim 2, wherein, At least one of the first included angle and the second included angle is within a range of 70-80 degrees.

12. The fingerprint acquisition apparatus of claim 2, wherein, A collection window of at least one of the first fingerprint collection instrument and the second fingerprint collection instrument extends in a normal direction of the bottom surface.

13. The fingerprint acquisition apparatus of claim 1, wherein, In the normal direction of the bottom surface, the size of the collection window of at least one of the first fingerprint collection instrument and the second fingerprint collection instrument is greater than 80 mm.

14. The fingerprint acquisition apparatus of claim 13, wherein, At least one of the first fingerprint collection instrument, the second fingerprint collection instrument and the third fingerprint collection instrument is an ultra-thin fingerprint collection instrument.

15. The fingerprint acquisition apparatus of claim 14, wherein, The ultra-thin fingerprint collection instrument comprises a backlight source and a sensor, and the backlight source is located on a side of the sensor away from a contact surface.

16. The fingerprint acquisition apparatus of claim 14, wherein, The backlight source and the sensor are arranged in a stack.

17. The fingerprint acquisition apparatus of claim 14, wherein, Light generated by the backlight source is reflected and transmitted at the contact surface to form signal light, and the sensor receives the signal light.

18. The fingerprint acquisition apparatus of claim 1, wherein, The ultra-thin fingerprint collection instrument further comprises a collimator located on a side of the sensor away from the backlight source. A power supply interface and a data transmission interface are arranged on a fourth side of the housing, and the fourth side is opposite to the third side.

Images