CN113705399A - Fingerprint module and electronic equipment - Google Patents

Abstract

The application discloses a fingerprint module and electronic equipment, wherein the fingerprint module comprises an ultrasonic fingerprint detection unit and a protection bag; the protection bag is arranged on the ultrasonic fingerprint detection unit, the interior of the protection bag is hollow to form an accommodating cavity, and a gas is filled in the accommodating cavity; an ultrasonic reflection interface is formed at a position where the protection bag is in contact with the ultrasonic fingerprint detection unit. The utility model discloses a fingerprint module and electronic equipment, structural design is reasonable, protection display screen and ultrasonic fingerprint detecting unit that can be better for fingerprint module and electronic equipment have better fingerprint identification performance.

Description

Fingerprint module and electronic equipment

Technical Field

This application belongs to communication technology field, concretely relates to fingerprint module and electronic equipment.

Background

The fingerprint has uniqueness, and the fingerprint identification is to classify and compare the fingerprints of the identification objects so as to judge. The fingerprint identification technology is gradually mature in the new century as one of the biological characteristic identification technologies, and enters the field of production and living of human beings.

In the related art, the ultrasonic fingerprint detection technology is a new fingerprint identification technology. The ultrasonic fingerprint detection technology sends approximately planar ultrasonic waves to a finger through an ultrasonic fingerprint detection unit, the ultrasonic waves act with valleys and ridges of the finger, different reflectivity occurs at the valleys and the ridges respectively, and therefore echo signals with differences are generated, and the ultrasonic fingerprint detection unit can obtain the fingerprint information of the detected finger by receiving and analyzing the echo signals with the differences.

However, the current ultrasonic fingerprint detection unit is disposed below the display screen. When the finger presses the display screen, the fingerprint can be along with the same deformation of display screen for the display screen drives ultrasonic fingerprint detecting element and removes and contact other parts of complete machine, and the ultrasonic signal characteristic of the position department that ultrasonic fingerprint detecting element and other parts contacted can change, thereby lead to producing unusual pattern at fingerprint identification's in-process, so that ultrasonic fingerprint detecting element's fingerprint identification's performance is impaired, can't detect the fingerprint information of correct user's finger.

Disclosure of Invention

The present application is directed to a fingerprint module and an electronic device, which at least solve one of the problems of the related art.

In order to solve the technical problem, the present application is implemented as follows:

first aspect, this application embodiment provides a fingerprint module, includes:

an ultrasonic fingerprint detection unit;

the protection bag is arranged on the ultrasonic fingerprint detection unit, the protection bag is hollow inside to form an accommodating cavity, and a gas is filled in the accommodating cavity;

an ultrasonic reflection interface is formed at a position where the protection bag is in contact with the ultrasonic fingerprint detection unit.

In a second aspect, an embodiment of the present application provides an electronic device, including:

a display screen and a frame body;

the fingerprint module, the fingerprint module adopts foretell fingerprint module, the fingerprint module set up in the display screen with between the framework, just the protection bag orientation the framework.

In the embodiment of the application, the protection bag is arranged in the ultrasonic fingerprint detection unit, and the protection bag is filled with gas, so that the protection bag can bear pressure. When pressing the screen at the finger, the protection bag will support ultrasonic fingerprint detecting element and screen, prevents screen deformation effectively to make ultrasonic fingerprint detecting element can detect clear and accurate fingerprint information, guaranteed that ultrasonic fingerprint detecting element has better fingerprint identification performance.

In addition, an ultrasonic reflection interface is formed at a position where the protective bag is in contact with the ultrasonic fingerprint detection unit. The ultrasonic reflection interface enables the ultrasonic waves to be reflected, reflected ultrasonic signals are uniform, and the reflected ultrasonic signals can be removed as background noise, so that the ultrasonic fingerprint detection unit is further guaranteed to have better fingerprint identification performance.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

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

FIG. 2 is an ultrasonic propagation diagram of an ultrasonic fingerprint detection unit of an electronic device according to an embodiment of the present application;

fig. 3 is a schematic diagram illustrating a reflection state of ultrasonic waves of an ultrasonic fingerprint detection unit of an electronic device at a finger ridge and a finger valley according to an embodiment of the present application.

Reference numerals:

in the figure: 1. a protective bag; 11. a first inner surface; 12. a second inner surface; 13. a first outer surface; 14. a second outer surface; 101. an accommodating chamber; 2. a chip layer; 3. a layer of piezoelectric material; 4. a silver paste layer; 5. a display screen; 6. a frame body; 7. gluing; 8. an ultrasonic fingerprint detection unit; 9. a finger ridge; 10. a finger valley; 100. a finger.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specified. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

A fingerprint module and an electronic device according to embodiments of the present application are described below with reference to fig. 1-3.

As shown in fig. 1 to 3, the present embodiment provides a fingerprint module, which is applied to an electronic device with a fingerprint identification function, such as a mobile phone, a tablet computer, a game machine, and the like.

Specifically, the fingerprint module comprises an ultrasonic fingerprint detection unit 8 and a protection bag 1; protection bag 1 set up in ultrasonic wave fingerprint detecting element 8, the inside cavity formation of protection bag 1 holds chamber 101 hold the packing body in the chamber 101. Since the housing chamber 101 of the protective bag 1 is filled with gas, so that there is gas pressure inside the protective bag 1, the protective bag 1 can withstand pressure. When user's finger pressed display screen 5, protection bag 1 can support ultrasonic wave fingerprint detecting element 8 and display screen 5, effectively prevents that display screen 5 from taking place deformation, effectively prevents the fingerprint image deformation to make ultrasonic wave fingerprint detecting element 8 can accurately detect user's fingerprint information, thereby realize electronic equipment's fingerprint identification function such as screen fingerprint unblock, APP fingerprint unblock.

Further specifically, an ultrasonic reflection interface is formed at a position where the protective bag 1 is in contact with the ultrasonic fingerprint detection unit 8. A solid-gas interface, which is an ultrasonic reflection interface, is formed at a position where the protective bag 1 contacts the ultrasonic fingerprint detection unit 8, so that uniform reflection of ultrasonic waves can be achieved, so that ultrasonic signals reflected at the ultrasonic reflection interface are removed as noise.

In the present embodiment, the protection bag 1 is disposed in the ultrasonic fingerprint detection unit 8, and the protection bag 1 can bear pressure because the protection bag 1 is filled with gas. When pressing the screen at the finger, protection bag 1 will support ultrasonic fingerprint detecting element 8 and screen, prevents screen deformation effectively to make ultrasonic fingerprint detecting element 8 can detect clear and accurate fingerprint information, guaranteed that ultrasonic fingerprint detecting element 8 has better fingerprint identification performance.

In addition, an ultrasonic reflection interface is formed at a position where the protective bag 1 contacts the ultrasonic fingerprint detection unit 8. The ultrasonic reflection interface enables the ultrasonic waves to be reflected, reflected ultrasonic signals are uniform, and the reflected ultrasonic signals can be removed as background noise, so that the ultrasonic fingerprint detection unit 8 is further guaranteed to have better fingerprint identification performance.

Optionally, the ultrasonic fingerprint detection unit 8 includes a chip layer 2, a piezoelectric material layer 3, and a silver paste layer 4, which are stacked in sequence, and the protection bag 1 is disposed on one side of the silver paste layer 4, which is far away from the piezoelectric material layer 3.

Wherein, chip layer 2 is the core function part of fingerprint module, and it is used for turning into the signal of telecommunication and carry out the operation processing with finger line, and electric connection and communication are realized with the mainboard to rethread flexible circuit board to accomplish electronic equipment's unblock. The piezoelectric material layer 3 is used to realize interconversion of ultrasonic waves and electric signals. The silver paste layer 4 is used as a component of the fingerprint module, the fingerprint identification function is actually to form a capacitor, and the silver paste layer 4 is one of the polar plates of the capacitor.

In this embodiment, display screen 5 is located the one side of keeping away from piezoelectric material layer 3 of chip layer 2, and protection bag 1 is located the one side of keeping away from piezoelectric material layer 3 of silver thick liquid layer 4, can support display screen 5 and ultrasonic fingerprint detecting element 8 better, prevents effectively that screen and ultrasonic fingerprint detecting element 8 from taking place deformation under the condition of pressing of user's finger to help guaranteeing fingerprint identification in-process fingerprint pattern's accuracy.

In addition, in the above embodiment, the ultrasonic fingerprint detection unit 8 and the protection bag 1 have simple structures, which facilitates quick assembly of the electronic device and can ensure better fingerprint identification performance of the ultrasonic fingerprint detection unit 8.

Optionally, the protective bag 1 is cylindrical. This makes the thickness of protection bag more even, is convenient for realize that protection bag 1 supports ultrasonic fingerprint detecting element 8's stability, prevents ultrasonic fingerprint detecting element 8 effectively and presses the deformation of in-process to the ultrasonic fingerprint detecting element 8 of being convenient for discerns user's fingerprint.

In the present embodiment, the accommodating chamber 101 is filled with air, so that the inside of the protection bag 1 has air pressure, and the protection bag 1 can better support the ultrasonic fingerprint detection unit 8 and the display screen 5. The application does not limit the gas filled in the accommodating cavity 101 as long as the protection bag 1 can be ensured to have the performance of bearing pressure.

Optionally, the accommodating chamber 101 is filled with air. First, the air is filled in the accommodating chamber 101, so that the operation is very convenient and the cost is low. Secondly, if the protective bag 1 generates gas leakage, the air cannot be polluted, and the protective bag is more environment-friendly.

Optionally, the accommodating cavity 101 is shaped as a rectangular parallelepiped. After the gas body is filled in the chamber 101, the chamber 101 that holds of cuboid is convenient for keep the stability of the atmospheric pressure of protection bag 1 to be convenient for protection bag 1 to the stable support of ultrasonic fingerprint detecting unit 8 and display screen 5. Meanwhile, the containing cavity 101 of the cuboid facilitates uniform reflection of ultrasonic waves at the interface between the capsule wall of the protection capsule 1 and the gas layer of the containing cavity 101, so that reflected ultrasonic signals can be removed as bottom noise, and the ultrasonic fingerprint detection unit 8 is guaranteed to have better fingerprint identification performance.

Optionally, the protective bag 1 has a first inner surface 11 and a second inner surface 12, the first inner surface 11 and the second inner surface 12 are arranged in parallel, and the first inner surface 11 faces away from the ultrasonic fingerprint detection unit 8; the receiving cavity 101 is located between the first inner surface 11 and the second inner surface 12.

In the above embodiment, the ultrasonic signal can be reflected uniformly, and the ultrasonic signal which is convenient to reflect is removed as noise floor, thereby ensuring that the ultrasonic fingerprint detection unit 8 has better fingerprint identification performance.

According to a second aspect of the present application, the embodiment provides an electronic device, which may be a mobile phone, a tablet computer, a handheld game console, and the like, and the structure that can be unlocked through the fingerprint module is within the protection scope of the present application.

Specifically, this electronic equipment includes display screen 5, framework 6 and fingerprint module.

In this application, the fingerprint module adopts foretell fingerprint module, the fingerprint module set up in display screen 5 with between the framework 6, just the protection bag 1 orientation framework 6.

Set up protection bag 1 between ultrasonic fingerprint detecting element 8 and framework 6, when the finger presses display screen 5, prevent effectively that the partial structure that leads to ultrasonic fingerprint detecting element 8 from contacting the center because of display screen 5 and ultrasonic fingerprint detecting element 8 produce deformation, thereby avoid ultrasonic fingerprint detecting element 8 to change with the ultrasonic signal characteristic of center contact position effectively, thereby make ultrasonic fingerprint detecting element 8 produce accurate fingerprint pattern, guarantee that the fingerprint module has better fingerprint identification performance.

Optionally, the fingerprint module is fixed in display screen 5, this makes the fingerprint module can be connected with display screen 5 steadily, also helps realizing that after the fingerprint is pointed in the input of display screen 5, the fingerprint module can be fast and accurately discerned the fingerprint to guarantee electronic equipment's fingerprint identification performance.

In a specific example, the electronic device further comprises an adhesive 7, and the fingerprint module is adhered to the display screen 5 through the adhesive 7. This makes fingerprint module and display screen 5's connection very simple, is convenient for realize electronic equipment's equipment, also is favorable to guaranteeing that the fingerprint module has better fingerprint identification performance simultaneously.

In the present embodiment, when the user performs fingerprint unlocking, the piezoelectric material layer 3 generates vibration while the display screen 5 side and the center frame side emit ultrasonic waves.

As shown in fig. 2 and 3, the ultrasonic waves emitted to the side of the display screen 5 can penetrate the display screen 5 to reach the finger 100 of the user. At the interface of the finger ridge 9 of the user and the display screen 5, as the finger ridge 9 and the display screen 5 are both solid, the acoustic resistance difference is small, and the reflected signal is weak; on the interface between the finger valley 10 and the display screen 5, since the finger valley 10 is air, the difference between the acoustic resistances of the finger valley 10 and the display screen 5 is large, and the reflected signal is strong. According to the difference of the intensity of the reflected signals of the finger valley 10 and the finger ridge 9, the ultrasonic fingerprint detection unit can obtain the fingerprint grain of the finger 100 of the user, and therefore the collection of the fingerprint grain of the finger 100 of the user is achieved. And ultrasonic signal propagates to center one side, when propagating to ultrasonic fingerprint detecting element 8 and protection bag 1's boundary surface, because ultrasonic fingerprint detecting element 8 is the solid, and protection bag 1's the chamber 101 that holds is gaseous, the acoustic resistance difference between them is big, thereby make the ultrasonic wave take place stronger reflection at the ultrasonic reflection interface, and the reflected signal characteristic is even, it can be got rid of as end noise, does not cause any influence to electronic equipment's fingerprint identification performance, thereby make the fingerprint module have better fingerprint identification performance.

In addition, when user's finger pressed display screen 5, there was atmospheric pressure in the inside of protection bag 1, thereby make protection bag 1 can play better supporting role to display screen 5 and ultrasonic fingerprint detecting unit 8, effectively reduce the deformation of display screen 5 and ultrasonic fingerprint detecting unit 8, avoid ultrasonic fingerprint detecting unit 8 direct contact framework 6, thereby make protection bag 1 and ultrasonic fingerprint detecting unit 8 can form complete solid-gas interface, avoid ultrasonic fingerprint detecting unit 8 direct contact framework 6 and lead to the fingerprint identification performance inefficacy effectively.

In some examples, an opening is provided on a side of the protective bag 1 facing the frame 6, the protective bag 1 is provided on the frame 6, and the frame 6 closes the opening.

In the above embodiment, the accommodating cavity 101 is formed by the protective bag 1 and the frame 6, which helps to reduce the thickness of the protective bag 1, thereby being beneficial to the light and thin electronic device required by the user.

Optionally, the protective bag 1 comprises a first outer surface 13 and a second outer surface 14.

The first outer surface 13 is parallel to the second outer surface 14, the first outer surface 13 is fixed to the ultrasonic fingerprint detection unit 8, and the second outer surface 14 is fixed to the frame 6.

Because the first outer surface 13 is parallel to the second outer surface 14, firstly, the first outer surface 13 of the protection bag 1 is conveniently and stably fixed on the ultrasonic fingerprint detection unit 8, and the second outer surface 14 of the protection bag 1 is also conveniently and stably fixed on the frame body 6, so that the protection bag 1 is more stable in the electronic device, and the protection bag 1 can better support the ultrasonic fingerprint detection unit 8 and the display screen 5.

The utility model discloses a fingerprint module and electronic equipment, structural design is reasonable, protection display screen 5 and ultrasonic fingerprint detecting element 8 that can be better for fingerprint module and electronic equipment have better fingerprint identification performance.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. The utility model provides a fingerprint module which characterized in that includes:

an ultrasonic fingerprint detection unit (8);

the protection bag (1) is arranged on the ultrasonic fingerprint detection unit (8), the protection bag (1) is hollow to form an accommodating cavity (101), and gas is filled in the accommodating cavity (101);

an ultrasonic reflection interface is formed at a position where the protection bag (1) is in contact with the ultrasonic fingerprint detection unit (8).

2. The fingerprint module of claim 1,

ultrasonic wave fingerprint detection unit (8) are including chip layer (2), piezoelectric material layer (3) and silver thick liquid layer (4) of superpose in proper order, protection bag (1) set up in keeping away from of silver thick liquid layer (4) one side of piezoelectric material layer (3).

3. Fingerprint module according to claim 1, wherein the protective pocket (1) is cylindrical.

4. The fingerprint module of claim 1, wherein the receiving cavity (101) is rectangular parallelepiped in shape.

5. The fingerprint module according to claim 1, characterized in that the protective bag (1) has a first inner surface (11) and a second inner surface (12), the first inner surface (11) and the second inner surface (12) being arranged in parallel, the first inner surface (11) facing away from the ultrasonic fingerprint detection unit (8);

the housing cavity (101) is located between the first inner surface (11) and the second inner surface (12).

6. An electronic device, comprising:

a display screen (5) and a frame body (6);

the fingerprint module set of any one of claims 1 to 5, which is disposed between the display screen (5) and the frame body (6), and the protective bag (1) faces the frame body (6).

7. The electronic device of claim 6,

the fingerprint module is fixed on the display screen (5).

8. The electronic device according to claim 6, further comprising an adhesive (7);

the fingerprint module is bonded to the display screen (5) through the bonding glue (7).

9. The electronic device of claim 6,

one side, facing the frame body (6), of the protection bag (1) is provided with an opening, the protection bag (1) is arranged on the frame body (6), and the frame body (6) seals the opening.

10. The electronic device according to claim 6, characterized in that the protective capsule (1) comprises a first outer surface (13) and a second outer surface (14);

the first outer surface (13) is parallel to the second outer surface (14), the first outer surface (13) is fixed on the ultrasonic fingerprint detection unit (8), and the second outer surface (14) is fixed on the frame body (6).

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