Patent Description:
With development of science and technology, an electronic device has been basically popularized in all aspects of people's living environment. To make it more convenient for the electronic device to serve people, information exchange between the electronic device and people is crucial. An electronic device such as a mobile phone is used as an example. Information exchange between the mobile phone and a human mainly includes keyboard pressing, screen touching, wireless communication, voice input, facial recognition, fingerprint recognition, and the like. Fingerprint recognition has been widely used in operations such as unlocking and payment in the mobile phone for uniqueness and convenience.

The mobile phone is used as an example. An existing fingerprint recognition system is usually disposed at a position at which a front physical button is located, disposed on a back, and disposed below a display screen. Nowadays, full-screen display is an important development direction and a technical selling point for future electronic devices such as a mobile phone, and an in-screen fingerprint recognition technology corresponding to full-screen display can draw more attention for user-friendliness. Currently, common in-screen fingerprint recognition technologies include an optical fingerprint recognition technology, a capacitive fingerprint recognition technology, an ultrasonic fingerprint recognition technology, and the like. To improve competitiveness of electronic devices such as the mobile phone, impact of a fingerprint apparatus on architecture design of the electronic devices such as the mobile phone needs to be minimized, and more attention needs to be paid on impact of a location of the fingerprint apparatus in the electronic device and a thickness and an area of the fingerprint apparatus on the architecture design. An existing fingerprint apparatus cannot receive a fingerprint image at a relatively long distance, and therefore usually needs to be installed through attachment to a screen. It is relatively difficult to implement installation through attachment to the screen, and there is a problem that the display screen is scrapped due to poor attachment. <CIT> discloses a fingerprint identification device which includes a micro- telecentric lens array group, for receiving optical signal reflected from a human finger and a fingerprint sensor set to the lower section of micro- telecentric lens array group. <CIT> discloses an optical fingerprint identification device able that includes a light detection array, a first shading layer formed above the light detection array, wherein the first shading layer is provided with multiple light passing apertures, a first microlens array set to above first shading layer, wherein the first microlens array is used to converge optical signal to the multiple light passing apertures of the first shading layer, and the optical signal is transmitted to the light detection array by the multiple light passing apertures of the first shading layer. <CIT> discloses a fingerprint identification device, to be applied on a electronic equipment, which includes a support plate, at least one fingerprint sensor chip set to the upper surface of the support plate, wherein the support plate is used to be mounted on the center of the electronic equipment.

An installation position is flexible, and therefore a problem that a screen is scrapped due to installation of the fingerprint apparatus through attachment to the screen can be avoided.

<NUM>: Screen; <NUM>: Fastening frame; <NUM>: Battery region; <NUM>: Non-battery region; <NUM>: Fingerprint apparatus; <NUM>: Image sensor; <NUM>: Collimation component; <NUM>: Lens structure; <NUM>: Fingerprint apparatus; <NUM>: Fingerprint image sensor; <NUM>: Collimator; <NUM>: Collimator hole; <NUM>: First microlens group; <NUM>: First microlens unit; <NUM>: Second microlens group; <NUM>: Second microlens unit; <NUM>: Flexible circuit board; <NUM>: Display screen; <NUM>: Middle frame; <NUM>: Groove; <NUM>: Middle frame body; <NUM>: Middle frame support member; <NUM>: Mounting hole; <NUM>: Battery module; <NUM>: Battery region; and <NUM>: Non-battery region.

To facilitate understanding of the solutions, related structure stacking related to installation of a fingerprint apparatus in an electronic device is briefly described herein. <FIG> is a schematic stacking diagram of a typical architecture of an existing electronic device such as a mobile phone. The architecture includes a screen <NUM> and a fastening frame <NUM>. Space below the fastening frame <NUM> may be divided into a battery region <NUM> and a non-battery region <NUM> based on different disposed parts. The battery region <NUM> is used to accommodate a power supply. The non-battery region <NUM> is used to accommodate other optional electronic elements such as a circuit board, a speaker box, a motor, and a camera. Based on the architecture, a fingerprint apparatus is placed below the screen <NUM>. The fingerprint apparatus may be fastened to the screen <NUM> or the fastening frame <NUM>. In addition, the fingerprint apparatus may be located above the battery region <NUM> or the non-battery region <NUM>. Due to a limitation of a structure or the prior art, in the foregoing solution of positions for disposing the fingerprint apparatus, there is a possibility that the fingerprint apparatus cannot be disposed at some of the positions, or there may be some problems after implementation. For example, when the fingerprint apparatus is attached to the screen <NUM> for assembly, there is a problem of relatively high costs due to poor attachment, and a limited thickness of the fingerprint apparatus affects a battery capacity or results in an increase in a thickness of the entire device. When the fingerprint apparatus is relatively thick, the fingerprint apparatus can be disposed only above the non-battery region <NUM>. However, a requirement for a large-area in-screen fingerprint cannot be met due to a limited area of the non-battery region <NUM>. In a thickness direction of the electronic device, a direction from the fastening frame to the screen is an upward direction, and a direction from the screen to the fastening frame is a downward direction. The fingerprint apparatus may be located above the battery region <NUM>. It may be understood that the fingerprint apparatus is located above the battery region in the thickness direction of the electronic device, and an orthographic projection of the fingerprint apparatus on the fastening frame is located in a region of an orthographic projection of the battery region on the fastening frame. Correspondingly, the fingerprint apparatus may be located above the non-battery region <NUM>. It may be understood that the fingerprint apparatus is located above the non-battery region in the thickness direction of the electronic device, and an orthographic projection of the fingerprint apparatus on the fastening frame is located in a region of an orthographic projection of the battery region on the fastening frame.

For example, there are usually the following two implementations for an in-screen fingerprint in the prior art:
<FIG> shows an internal structure of a first fingerprint apparatus <NUM> in the prior art. The fingerprint apparatus <NUM> is installed below a screen <NUM>, and includes an image sensor <NUM> and a collimation component <NUM>. When a human finger presses the screen <NUM>, fingerprint information light of the finger passes through the screen <NUM>, is integrated by the collimation component <NUM>, and then is transmitted to the image sensor <NUM>. The image sensor <NUM> may recognize fingerprint information. <FIG> is a schematic structural diagram in which the fingerprint apparatus <NUM> in this solution is installed in an electronic device architecture. Only the collimation component <NUM> with a relatively small size is disposed in the fingerprint apparatus <NUM> in this solution to fit with the image sensor <NUM>, and therefore the fingerprint apparatus <NUM> is relatively thin, and may be installed in a battery region <NUM> or a non-battery region <NUM>. However, in a solution of attaching the fingerprint apparatus <NUM> to the screen <NUM>, there is a problem that the screen <NUM> is scrapped due to poor attachment. In addition, if the collimation component <NUM> of the fingerprint apparatus <NUM> in this solution is relatively far away from the screen <NUM>, there is relatively low light transmittance, an optical fingerprint image is distorted, and recognition cannot be performed well. Consequently, fingerprint information cannot be normally collected, and normal operation is affected.

<FIG> shows an internal structure of a second fingerprint apparatus <NUM> in the prior art. The fingerprint apparatus <NUM> is installed below a screen <NUM>, and includes an image sensor <NUM> and a lens structure <NUM> located between the image sensor <NUM> and the screen <NUM>. When a human finger presses the screen <NUM>, fingerprint information light of the finger passes through the screen <NUM>, is focused by the lens structure <NUM> for reverse imaging, and then is transmitted to the image sensor <NUM>. The image sensor <NUM> may recognize fingerprint information. <FIG> is a schematic structural diagram in which the fingerprint apparatus <NUM> in this solution is installed in an electronic device architecture. The lens structure <NUM> is disposed in the fingerprint apparatus <NUM> in this solution to fit with the image sensor <NUM>, and therefore a specific distance is required for optical path propagation of the fingerprint apparatus <NUM> to ensure reverse imaging, that is, the fingerprint apparatus <NUM> is relatively thick. Therefore the fingerprint apparatus <NUM> can be installed only in a non-battery region <NUM>.

An embodiment of this application provides a fingerprint apparatus <NUM>. Referring to <FIG>, the fingerprint apparatus <NUM> is disposed below a display screen <NUM> of an electronic device, and includes a fingerprint image sensor <NUM>, and further includes a collimator <NUM> disposed between the fingerprint image sensor <NUM> and the display screen <NUM>. A first microlens group <NUM> is disposed between the collimator <NUM> and the display screen <NUM>. The first microlens group <NUM> includes at least one first microlens unit <NUM>. The first microlens unit <NUM> corresponds to a collimator hole <NUM> of the collimator <NUM>, and is disposed above the collimator <NUM>. The first microlens unit <NUM> is configured to converge fingerprint image light information above the display screen <NUM> to the collimator hole <NUM> of the collimator <NUM>.

In the fingerprint apparatus <NUM> provided in this embodiment of this application, referring to <FIG>, the first microlens group <NUM> is disposed on a side of the collimator <NUM> that is away from the fingerprint image sensor <NUM>, the first microlens group <NUM> includes at least one first microlens unit <NUM>, and the first microlens unit <NUM> is disposed corresponding to the collimator hole <NUM> of the collimator <NUM>. In this way, when the fingerprint apparatus <NUM> is relatively far away from the display screen <NUM>, the fingerprint image light information can still be smoothly transmitted to the fingerprint image sensor <NUM>, thereby removing a limitation that the fingerprint apparatus <NUM> can be installed only through attachment to the screen. In addition, the fingerprint apparatus <NUM> may be installed at another position without being attached to the screen. An installation position is flexible, and therefore a problem that the screen is scrapped due to installation of the fingerprint apparatus through attachment to the screen can be avoided. In addition, a microlens structure with a relatively small size is used to integrate light, which is different from a reflection imaging solution of a convex lens with a relatively large size of a camera in the solution shown in <FIG>. Therefore, the entire fingerprint apparatus <NUM> is relatively thin, and may be flexibly installed at a plurality of positions in small space.

It should be noted that the collimator (collimator) may be made of a material such as a silicon material, glass fiber, or plastic. The collimator is disposed on a surface on a side of the fingerprint sensor, and may be used to block incident light at an angle, to a surface of the fingerprint sensor, that exceeds a specific angle threshold, to ensure that incident light perpendicular to or approximately perpendicular to the surface of the fingerprint sensor is incident on the surface of the fingerprint sensor, so as to improve light utilization and reduce interference from stray light.

To clearly describe an effect of the fingerprint apparatus <NUM> provided in this embodiment of this application, referring to <FIG>, when a finger presses the display screen <NUM>, fingerprint light information is transmitted downward through the collimator hole <NUM>. A structure of the collimator hole <NUM> disposed on the collimator <NUM> is shown in <FIG>. For example, further referring to <FIG>, the fingerprint light information includes light a and light b in the figure. The first microlens unit <NUM> is disposed for a collimator hole <NUM> to which the light a points, and no first microlens unit <NUM> is disposed for a collimator hole <NUM> to which the light b points. In this case, the light a is transmitted more efficiently than the light b. Specifically, referring to <FIG>, when no first microlens unit <NUM> is disposed above the collimator hole <NUM>, in four beams of light e, f, g, and h shown in the figure, light in a range of f and g can be smoothly transmitted from one side of the collimator hole <NUM> to the other side, and light outside the range of f and g, for example, the light e and h, cannot be correctly transmitted from one side of the collimator hole <NUM> to the other side. In comparison with <FIG>, referring to <FIG>, when the first microlens unit <NUM> is disposed corresponding to the collimator hole <NUM>, light (including light f and g) in a range of light e and h is refracted and integrated by the first microlens unit <NUM>, and can be smoothly transmitted from one side of the collimator hole <NUM> to the other side. It may be clearly learned that in comparison with a fingerprint apparatus in which no first microlens unit <NUM> is disposed, in the fingerprint apparatus <NUM> in which the first microlens unit <NUM> is disposed, light transmittance is clearly improved. Therefore, when the fingerprint apparatus <NUM> provided in this embodiment of this application is relatively far away from the display screen <NUM>, the fingerprint apparatus <NUM> can still normally recognize fingerprint information, and may not need to be attached to the display screen <NUM> for installation in this case. An installation position is flexible, and therefore a problem that the screen is scrapped due to installation of the fingerprint apparatus through attachment to the screen can be avoided.

To implement better transmission and imaging of light emitted from the collimator hole <NUM>, a second microlens group <NUM> is further disposed between the collimator hole <NUM> and the fingerprint image sensor <NUM>. As shown in <FIG>, the second microlens group <NUM> includes at least one second microlens unit <NUM>. The second microlens unit <NUM> is disposed corresponding to the collimator hole <NUM> of the collimator <NUM>. The second microlens unit <NUM> is configured to converge light that passes through the collimator hole <NUM> of the collimator <NUM> to the fingerprint image sensor <NUM>. The first microlens group <NUM> may converge light that cannot be incident into the collimator hole <NUM> or that cannot be transmitted in a straight line into the collimator hole <NUM>, thereby increasing light transmittance. The second microlens group <NUM> may converge the light that passes through the collimator hole <NUM> to the fingerprint image sensor <NUM>, thereby improving a fingerprint recognition effect.

Referring to <FIG>, the collimator <NUM> includes a plurality of collimator holes <NUM>. To increase light transmittance of each collimator hole <NUM>, there may be a plurality of first microlens units <NUM>. Specifically, as shown in <FIG>, there are a plurality of first microlens units <NUM>, and the plurality of first microlens units <NUM> are disposed in a one-to-one correspondence with the plurality of collimator holes <NUM> of the collimator <NUM>.

Similarly, to further converge fingerprint image light information that passes through each collimator hole <NUM> to the fingerprint image sensor, there may be a plurality of second microlens units <NUM>. As shown in <FIG>, there are a plurality of second microlens units <NUM>, and the plurality of second microlens units <NUM> are disposed in a one-to-one correspondence with the plurality of collimator holes <NUM> of the collimator <NUM>.

The first microlens unit <NUM> is a convex lens with a light convergence function, and a specific shape and structure of the convex lens may be flexibly adjusted based on an actual optical path requirement and an assembly requirement. As shown in <FIG>, a side, of the convex lens, that faces the collimator hole is relatively flat to facilitate assembly.

Similarly, the second microlens unit <NUM> is a convex lens. The second microlens unit <NUM> is a convex lens with a light convergence function, and a specific shape and structure of the convex lens may be flexibly adjusted based on an actual optical path requirement and an assembly requirement. As shown in <FIG>, a side, of the convex lens, that faces the collimator hole is relatively flat to facilitate assembly.

It should be noted that referring to <FIG>, the convex lenses, namely, the first microlens unit <NUM> and the second microlens unit <NUM> herein, are disposed corresponding to the collimator hole <NUM> of the collimator <NUM>, and are different from the lens structure <NUM> in the prior art shown in <FIG>. In comparison with the lens structure <NUM> for implementing reverse imaging through light focusing in <FIG>, the first microlens unit <NUM> and the second microlens unit <NUM> are smaller in size, and are used only to integrate light. Therefore, less impact is exerted on a thickness of the entire fingerprint apparatus <NUM>.

To supply power and transmit a signal to the fingerprint image sensor <NUM>, a corresponding connection structure circuit is usually required, for example, a wire, a signal cable, or a printed circuit board. To facilitate installation and assembly, as shown in <FIG>, the fingerprint apparatus <NUM> further includes a flexible circuit board <NUM> configured to transmit a current and a signal. The fingerprint image sensor <NUM> is fastened on the flexible circuit board <NUM>. The flexible circuit board <NUM> may have a relatively large deformation rate, to facilitate assembly on the premise of ensuring power supply and signal transmission.

According to a second aspect, an embodiment of this application further provides an electronic device. As shown in <FIG>, the electronic device includes a display screen <NUM>. The fingerprint apparatus <NUM> according to any one of the foregoing technical solutions is disposed at an interval below the display screen <NUM>.

As shown in <FIG>, the electronic device provided in this embodiment of this application includes the display screen <NUM>. The fingerprint apparatus <NUM> according to any one of the foregoing technical solutions is disposed at an interval below the display screen <NUM>, and therefore the fingerprint apparatus <NUM> is not attached to the display screen <NUM>. In this way, a problem that the screen is scrapped due to installation of the fingerprint apparatus through attachment to the screen can be avoided.

To prevent the fingerprint apparatus <NUM> from coming into contact with the display screen <NUM> to damage the display screen <NUM>, the fingerprint apparatus <NUM> and the display screen <NUM> are usually disposed at an interval during assembly and installation. After testing and calculation, a gap between the display screen <NUM> and the fingerprint apparatus <NUM> may be greater than or equal to <NUM>.

A corresponding installation support structure such as a middle frame is usually required for fastening the display screen <NUM> and a plurality of other parts of the electronic device. Therefore, as shown in <FIG>, the electronic device in this embodiment of this application includes a middle frame <NUM> located below the display screen <NUM>. The fingerprint apparatus <NUM> may be fastened to the middle frame <NUM>.

To facilitate fastening of the fingerprint apparatus <NUM> to the middle frame <NUM>, the fingerprint apparatus <NUM> is fastened to the middle frame <NUM> through attachment and bonding.

It should be noted that in the electronic device in this embodiment of this application, for ease of description, based on a use habit of the electronic device, the display screen <NUM> is usually located in an upward direction, to facilitate operation for a user. Therefore, two directions, namely, the upward direction and a downward direction, are determined. Specifically, referring to <FIG> and <FIG>, in a thickness direction of the electronic device, a direction from the middle frame <NUM> to the display screen <NUM> is the upward direction, and a direction from the display screen <NUM> to the middle frame <NUM> is the downward direction. It may be understood that the display screen <NUM> includes a light emitting surface and a backlight surface. The light emitting surface may display an image, and the backlight surface is opposite to the light emitting surface. A side close to the backlight surface is below the display screen.

The fingerprint apparatus <NUM> may be relatively thin, and therefore may be disposed above a battery region or a non-battery region of the electronic device. When the fingerprint apparatus <NUM> is located above the battery region of the electronic device, if a lower surface of the fingerprint apparatus <NUM> is lower than a lower surface of the middle frame <NUM>, a battery may be punctured, resulting in a serious consequence of burning the entire device. Therefore, to prevent the fingerprint apparatus <NUM> from puncturing the battery, referring to <FIG>, optionally, the lower surface of the middle frame <NUM> is lower than the lower surface of the fingerprint apparatus <NUM>. Certainly, if a process error can be ensured, the lower surface of the middle frame <NUM> may be coplanar with the lower surface of the fingerprint apparatus <NUM>.

The fingerprint apparatus <NUM> and the display screen <NUM> are disposed at an interval. In addition, during assembly of the display screen <NUM> and the middle frame <NUM>, to prevent the middle frame <NUM> from squeezing a display region of the display screen <NUM>, a side edge of the middle frame <NUM> or another intermediate structure (for example, a plastic frame) is usually connected to a side edge of the display screen <NUM>, to fasten the display screen <NUM>. Therefore, a specific safety gap also needs to be ensured between the middle frame <NUM> and the display region of the display screen <NUM>. Optionally, the gap is also greater than or equal to <NUM>. The fingerprint apparatus <NUM> is smaller in size relative to the middle frame <NUM>, and is installed on the middle frame <NUM>, and then the middle frame <NUM> is assembled with the display screen <NUM>. In this way, it is not easy to control the gap between the fingerprint apparatus <NUM> and the display screen <NUM>. Therefore, this can be easily implemented by using a distance between the middle frame <NUM> and the display screen <NUM> as a reference standard during installation. On this basis, as shown in <FIG>, provided that it is ensured that an upper surface of the middle frame <NUM> is higher than an upper surface of the fingerprint apparatus <NUM>, it can be ensured, by considering only the distance between the middle frame <NUM> and the display screen <NUM> during installation, that there is a sufficient gap between the display screen <NUM> and each of the middle frame <NUM> and the fingerprint apparatus <NUM>. As shown in <FIG>, to reduce a thickness of the entire electronic device, a groove <NUM> is disposed downward at a position, on the upper surface of the middle frame <NUM>, corresponding to the fingerprint apparatus <NUM>. The fingerprint apparatus <NUM> is fastened in the groove <NUM>.

Assembly of a plurality of electrical elements needs to be considered in the middle frame <NUM>, and therefore a plurality of structures need to be considered in structure design and layout of the middle frame <NUM>. To facilitate manufacturing of the middle frame <NUM>, some installation positions are usually reserved, and then adapted installation parts are manufactured separately to install the electrical elements. For example, as shown in <FIG>, the middle frame <NUM> includes a middle frame body <NUM> and a middle frame support member <NUM>. The groove <NUM> is disposed on the middle frame support member <NUM>. A mounting hole <NUM> is disposed on the middle frame body <NUM>. The middle frame support member <NUM> is disposed in the mounting hole <NUM>.

To prevent the middle frame support member <NUM> from falling from the mounting hole <NUM>, as shown in <FIG>, the mounting hole <NUM> is a stepped hole disposed downward along the middle frame body <NUM>, and an outer profile of a lower surface of the middle frame support member <NUM> matches the stepped hole. Fitting with the stepped hole may play a limiting role to prevent the middle frame support member <NUM> from falling from the mounting hole <NUM>.

As shown in <FIG>, the electronic device in this embodiment of this application includes a battery module <NUM> disposed below the middle frame <NUM>. There are a battery region <NUM> and a non-battery region <NUM> below the middle frame <NUM>. The battery module <NUM> is disposed in the battery region <NUM>. The fingerprint apparatus <NUM> is located above the battery region <NUM>, or the fingerprint apparatus <NUM> is located above the non-battery region <NUM>, or the fingerprint apparatus <NUM> is located above the battery region <NUM> and the non-battery region.

That the fingerprint apparatus is disposed above the battery region <NUM> may be understood as follows: The fingerprint apparatus is located above the non-battery region in the thickness direction of the electronic device, and an orthographic projection of the fingerprint apparatus on the middle frame <NUM> is located in a region of an orthographic projection of the battery region <NUM> on the middle frame <NUM>. Correspondingly, that the fingerprint apparatus is disposed above the non-battery region <NUM> may be understood as follows: The fingerprint apparatus is located above the non-battery region in the thickness direction of the electronic device, and an orthographic projection of the fingerprint apparatus on the middle frame <NUM> is located in a region of an orthographic projection of the non-battery region <NUM> on the middle frame <NUM>. Correspondingly, that the fingerprint apparatus is disposed above the battery region <NUM> and the non-battery region <NUM> may be understood as follows: The fingerprint apparatus is located above the battery region <NUM> and the non-battery region <NUM> in the thickness direction of the electronic device, and an orthographic projection of the fingerprint apparatus on the middle frame <NUM> is located in a region of an orthographic projection of the battery region on the middle frame <NUM> and a region of an orthographic projection of the non-battery region on the middle frame <NUM>.

As shown in <FIG>, a bottom surface of the fingerprint apparatus <NUM> is fastened to a bottom surface of the groove <NUM> through attachment. To prevent a side wall of the groove <NUM> from damaging the fingerprint apparatus <NUM> in an installation process, there is an avoidance gap between a side wall of the fingerprint apparatus <NUM> and the side wall of the groove <NUM>.

Optionally, the avoidance gap is greater than or equal to <NUM>.

The middle frame body <NUM> and the middle frame support member <NUM> may fit with each other in a manner of using the mounting hole <NUM> in the foregoing solution. Certainly, there may be another manner based on a space requirement and a structural requirement. For example, a manner of slotting the middle frame body <NUM> is used. In the manner of slotting the middle frame body <NUM>, the fingerprint apparatus <NUM> is located in a slot, that is, the middle frame body <NUM> is not penetrated through by the slot. For the middle frame body <NUM>, there is a slotting manner for receiving a structure of the fingerprint apparatus <NUM>. Specifically, the middle frame <NUM> includes the middle frame body <NUM> and the middle frame support member <NUM>. The groove <NUM> is disposed on the middle frame support member <NUM>, an assembly slot is disposed on the middle frame body <NUM>, and the middle frame support member <NUM> is disposed in the assembly slot. Optionally, the middle frame body <NUM> may be punctured, and a peripheral wall of the fingerprint apparatus <NUM> is fastened to a side wall of a hole through attachment. When a thickness of the middle frame body is the same as a thickness of the fingerprint apparatus <NUM>, the thickness of the electronic device may be reduced.

It should be noted that the middle frame body <NUM> is usually made of an aluminum alloy material, and the middle frame support member <NUM> may be made of any one of an aluminum alloy material, a steel sheet, an FR4 resin material whose strength meets a requirement, or the like.

According to a third aspect, an embodiment of this application further provides a manufacturing method. The method is used to manufacture the electronic device according to any one of the foregoing technical solutions, and includes the following steps:.

The manufacturing method provided in this embodiment of this application is used to manufacture the electronic device according to any one of the foregoing technical solutions. The fingerprint apparatus <NUM> is fastened to the middle frame <NUM>, and therefore a problem that the screen is scrapped due to installation of the fingerprint apparatus through attachment to the screen can be avoided.

Referring to <FIG> and <FIG>, when the electronic device includes a battery module <NUM> disposed below the middle frame <NUM>, there are a battery region <NUM> and a non-battery region <NUM> below the middle frame <NUM>. The battery module <NUM> is disposed in the battery region <NUM>. The fastening a fingerprint apparatus <NUM> to a middle frame <NUM> includes:.

Referring to <FIG> and <FIG>, the fingerprint apparatus <NUM> is fastened to the middle frame <NUM>, and the middle frame <NUM> includes a middle frame body <NUM> and a middle frame support member <NUM>. In this way, the fingerprint apparatus <NUM> may be fastened to the middle frame <NUM> in different assembly sequences.

The fastening a fingerprint apparatus <NUM> to a middle frame <NUM> includes:.

In the solution in which the middle frame body <NUM>, the middle frame support member <NUM>, and the fingerprint apparatus <NUM> are separately and sequentially assembled and fastened, the fingerprint apparatus <NUM>, the middle frame support member <NUM>, and the middle frame body <NUM> are independent of each other, and the fingerprint apparatus <NUM>, the middle frame support member <NUM>, and the middle frame body <NUM> need to be sequentially assembled. The middle frame support member <NUM> may be made of a same material as the middle frame body <NUM>, for example, a stainless steel material. A specific shape may be formed through stamping or CNC (Computerized Numerical Control, computer numerical control) processing based on a process requirement. In this solution, the components are independent and easy to process, but there are many process and assembly steps.

In the solution in which the middle frame support member <NUM> and the fingerprint apparatus <NUM> are assembled as a whole, and then the middle frame body <NUM> is fastened to the middle frame support member <NUM>, the fingerprint apparatus <NUM> and the middle frame support member <NUM> are combined as an integrated component. In this way, in a manufacturing process procedure, the fingerprint apparatus <NUM> and the middle frame support member <NUM> are first assembled into an integrated component, and then are directly assembled with the paired middle frame body <NUM>. The middle frame support member <NUM> may be used as a steel stiffener of the fingerprint apparatus <NUM>, and may be pressed with the fingerprint apparatus <NUM> to form an integrated component, and then the display screen <NUM> is assembled. In this solution, process and assembly steps are reduced, and module reliability is improved by using the middle frame support member <NUM>.

In the solution in which the middle frame body <NUM> and the middle frame support member <NUM> are assembled as a whole, and then the fingerprint apparatus <NUM> is fastened to the middle frame support member <NUM>, the middle frame support member <NUM> and the middle frame body <NUM> are combined as an integrated incoming material, the middle frame body <NUM> may be partially etched or stamped in a fingerprint attachment region to reduce a thickness, then the fingerprint apparatus <NUM> is directly attached to the integrated middle frame <NUM> for assembly, and finally the display screen <NUM> is assembled. In this solution, process and assembly steps are also reduced, but it is relatively difficult to process the middle frame <NUM>.

Claim 1:
A fingerprint apparatus, comprising a fingerprint image sensor and a collimator located on a side of the fingerprint image sensor, wherein a first microlens group is disposed on a side of the collimator that is away from the fingerprint image sensor, the first microlens group comprises at least one first microlens unit, the first microlens unit is disposed corresponding to a collimator hole of the collimator, and the first microlens unit is configured to converge light on the side of the collimator that is away from the fingerprint image sensor to the collimator hole of the collimator;
wherein a second microlens group is further disposed between the collimator and the fingerprint image sensor, the second microlens group comprises at least one second microlens unit, the second microlens unit is disposed corresponding to the collimator hole of the collimator, and the second microlens unit is configured to converge light that passes through the collimator hole of the collimator to the fingerprint image sensor;
wherein the first microlens unit is a convex lens with a light convergence function, the side of the first microlens unit facing the collimator hole being flat;
wherein the second microlens unit is a convex lens with a light convergence function, the side of the second microlens unit facing the collimator hole being flat.