JP2020107344A - Under-screen biometric authentication apparatus, biometric authentication unit, and terminal device - Google Patents

Abstract

To provide an under-screen biometric authentication apparatus, a biometric authentication unit, and a terminal device.SOLUTION: A terminal device 100 to which an under-screen biometric authentication apparatus can be applied includes: a display screen 120 and a biometric authentication module 140. The biometric authentication module is fixedly disposed under the display screen, and there is a gap between the biometric authentication module and the display screen. The biometric authentication module and a lower surface of the display screen are designed to be separated, which can reduce difficulty of disassembling of the biometric authentication module, thereby improving maintainability of the terminal device. Further, complexity when manufacturing the under-screen biometric authentication module is reduced and a yield is enhanced, and thus production cost is reduced.SELECTED DRAWING: Figure 1

Description

Embodiments of the present invention relate to the field of biometrics authentication technology, and more specifically, to an underscreen biometrics authentication device, a biometrics authentication unit, and a terminal device.

The conventional under-screen fingerprint authentication means is to bond an optical or ultrasonic fingerprint authentication module to the bottom of an organic light-emitting diode (OLED) screen, that is, even if it is an optical fingerprint authentication module. Even the sonic fingerprint authentication module must be in close contact with the light emitting layer at the bottom of the screen.

As a fixed form of such a conventional fingerprint authentication module, although under-screen fingerprint authentication is realized, there is usually the following problem because the fingerprint authentication module and the OLED screen are required to be fastened.

1. Since the OLED screen is expensive and very fragile, the OLED screen can be easily broken by attaching the fingerprint authentication module.

2. If the fingerprint authentication module is directly attached to the OLED screen, it is difficult to replace the fingerprint authentication module, and the OLED screen is likely to be damaged when the fingerprint authentication module is replaced. That is, since the fingerprint authentication module and the OLED screen are adhered together, if the fingerprint authentication module is damaged, the OLED screen is easily broken when the fingerprint authentication module is removed.

3. The process of attaching the fingerprint authentication module directly to the OLED screen is complicated.

From the above problems, in the conventional underscreen fingerprint authentication module, the yield is low, the cost is high, and the problems such as the complicated bonding process cannot be avoided, so that the cost and complexity of the terminal device increase, Reduce maintainability.

An underscreen biometrics authentication device, a biometrics authentication unit, and a terminal device are provided. The technical problem to be solved is that the underscreen biometrics authentication module and the OLED screen are integrally fixed, which makes maintenance difficult, the screen is easily broken, and the cost of the bonding process is high. is there.

According to the first aspect, a display screen and a biometrics authentication module are provided, the biometrics authentication module is fixedly installed below the display screen, and a gap is provided between the biometrics authentication module and the display screen. An existing underscreen biometrics authentication device is provided.

In the embodiment of the present application, by designing the biometrics authentication module and the lower surface of the display screen separately, the ease of removal of the biometrics authentication module is reduced and the maintainability of the terminal device is improved. You can Further, when producing the underscreen biometrics authentication device, the complexity of mounting the biometrics authentication module below the display screen is reduced, and the yield of the underscreen biometrics authentication device is improved, and the production cost is further improved. To reduce. In addition, the biometrics authentication stability and characteristics of the biometrics authentication module are not adversely affected.

In some embodiments, the underscreen biometrics authentication device further comprises a fixed frame for fixedly installing the biometrics authentication module below the display screen.

In some embodiments, the fixed frame includes an intermediate frame, a lower surface edge of the display screen is attached to an upper surface of the intermediate frame, and the biometrics authentication module is fixed to the intermediate frame. It

In some embodiments, the intermediate frame has a hole formed in a mounting area of the biometrics authentication module, and the biometrics authentication module is fixedly installed directly under the hole.

In some embodiments, the size of the holes is less than or equal to the size of the biometrics authentication module.

In some embodiments, the side surface of the biometrics authentication module is fixedly connected to the hole wall of the hole, or the edge of the top surface of the biometrics authentication module is on the bottom surface of the intermediate frame. It is fixedly connected.
In some embodiments, the stationary frame further comprises:
A module bracket is provided to secure the biometrics authentication module to the intermediate frame.

In some embodiments, a side surface of the biometrics authentication module is fixedly connected to an inner surface of the module bracket, or an upper surface of the biometrics authentication module is fixed to a lower surface of the module bracket. And the outer surface of the module bracket is fixedly connected to the hole wall of the hole, or the upper surface of the module bracket is fixed to the lower surface of the intermediate frame with a hole opening edge. Connected.

In some embodiments, an upper surface of the module bracket is higher than an upper surface of the biometrics authentication module, and the gap defines a height difference between an upper surface of the module bracket and an upper surface of the biometrics authentication module. Including.

In some embodiments, the module bracket is provided with a hollow structure and the biometrics authentication module is at least partially housed and secured within the hollow structure.

In some embodiments, a top edge of the hollow structure extends inwardly to form an annular fixing part, and an upper surface of the biometrics authentication module is fixedly connected to a lower surface of the annular fixing part.

In some embodiments, the fixed connection is
Fixing with screws, fixing with double-sided tape, fixing with an adhesive, fixing with welding, and fixing with bonding is performed.

In some embodiments, the underscreen biometrics authenticator further comprises a foam tape, wherein an edge of a lower surface of the display screen is affixed to the upper surface of the intermediate frame by the foam tape, and a width of the gap. Includes the thickness of the foam tape.

In some embodiments, a step structure is formed on an upper surface of the intermediate frame in an outer peripheral region of the hole, and a width of the gap includes a height difference of the step structure.

In some embodiments, on the upper surface of the intermediate frame, a tilt angle is formed by a chamfering process at a hole opening edge facing the display screen.

In some embodiments, the tilt angle extends to a hole opening edge on the lower surface of the intermediate frame that is directed away from the display screen, and the gap is in a direction perpendicular to the display screen in a plane in which the tilt angle is located. Including the projection height at.

In some embodiments, on the lower surface of the intermediate frame, a projecting structure extends down at the hole opening edge, which faces away from the display screen.

In some embodiments, a convex ring surrounding the protrusion structure is formed in a peripheral region of the lower surface of the intermediate frame adjacent to the protrusion structure, and the lower surface of the convex ring is the lower surface of the protrusion structure. Higher, the biometrics authentication module is fixed within the convex ring.

In some embodiments, on the lower surface of the intermediate frame, a groove structure extends upward at a hole opening edge facing the display screen, and the biometrics authentication module is provided in the groove structure. It is fixed to.

In some embodiments, the fixed frame includes a back lid to which the biometrics authentication module is fixed.

In some embodiments, the width of the gap is greater than or equal to a first distance that is a minimum distance that the biometrics authentication module does not touch the display screen when the terminal device is in a vibrating state.

In some embodiments, the width range of the gap is 0.5 mm-1 mm.

According to a second aspect, a module bracket and a biometrics authentication module are provided, and when the biometrics authentication module is fixed below the display screen by the module bracket, a gap is provided between the biometrics authentication module and the display screen. To provide a biometrics authentication unit that exists.

In some embodiments, a side surface of the biometrics authentication module is fixedly connected to an inner surface of the module bracket, or an upper surface of the biometrics authentication module is fixed to a lower surface of the module bracket. And the outer surface of the module bracket is fixedly connected to the hole wall of the hole, or the upper surface of the module bracket is fixed to the lower surface of the intermediate frame with a hole opening edge. Connected.

In some embodiments, the upper surface of the module bracket is higher than the upper surface of the biometrics authentication module, and when the biometrics authentication module is fixed below the display screen by the module bracket, the gap is The height difference between the upper surface of the module bracket and the upper surface of the biometrics authentication module is included.

In some embodiments, the module bracket is provided with a hollow structure and the biometrics authentication module is at least partially housed and secured within the hollow structure.

In some embodiments, a top edge of the hollow structure extends inwardly to form an annular fixing part, and an upper surface of the biometrics authentication module is fixedly connected to a lower surface of the annular fixing part.

In some embodiments, the fixed connection is performed by screw fixing, double-sided tape fixing, adhesive fixing, welding fixing, and fixing by coupling.

In some embodiments, the width of the gap is a first distance that is a minimum distance that the optical fingerprint module and the display screen do not touch when the terminal device including the display screen and the biometrics authentication unit is in a vibrating state. That is all.
In some embodiments, the width range of the gap is 0.5 mm-1 mm.

According to the third aspect, the underscreen biometrics authentication device according to the embodiment of the first aspect and the first aspect, or the biometrics according to the embodiment of the second aspect and the second aspect. Provided is a terminal device including an authentication unit.

It is a schematic plan view of a mobile terminal to which the present invention can be applied. FIG. 2 is a schematic partial cross-sectional view taken along the arrow A′-A′ of the mobile terminal shown in FIG. 1. It is a plane schematic diagram of the typical example of the under-screen biometrics authentication apparatus which stuck the biometrics authentication module on the lower surface of a display screen by a dispensing system. FIG. 7 is a schematic side sectional view of a representative example of another underscreen biometrics authentication device in which a biometrics authentication module is attached to the lower surface of a display screen. 1 is a schematic design diagram of an underscreen biometrics authentication device according to an embodiment of the present invention. FIG. 7 is a schematic design view of another underscreen biometrics authentication device according to an embodiment of the present invention. FIG. 3 is a schematic block diagram of a biometrics authentication unit according to an embodiment of the present invention.

Hereinafter, a technical solution in an embodiment of the present invention will be described with reference to the drawings.

Under-screen (Under-screen or Under-screen) biometrics authentication technology is attracting attention as the space for fingerprint buttons on the front of smart devices will be reduced in full screen as intelligent devices enter the full screen era. Collecting. The so-called under-screen biometrics authentication device allows a biometrics authentication operation to be performed inside the display area of the display screen by attaching a biometrics authentication module (for example, a fingerprint authentication module) below the display screen.

As a general application, the underscreen biometrics authentication device according to the embodiment of the present invention can be applied to any terminal device equipped with a display screen and a biometrics authentication module. Examples thereof include smartphones, tablet PCs, and other small personal portable devices such as personal digital assistants (PDAs) and electronic books (electronic books, E-books). In the terminal device, the biometrics authentication module is installed below the display screen, and can perform optical biometrics authentication, ultrasonic biometrics authentication or other type of finger biometrics authentication, and the user can use the display screen. In operation, the biometrics (eg fingerprints) of the user can be detected and authenticated.

In order to facilitate understanding, the underscreen biometrics authentication device according to the present application will be described below by taking an application scene in which a smartphone is the terminal device and an optical fingerprint module is the biometrics authentication module, but is not limited thereto. ..

As shown in FIGS. 1 and 2, FIG. 1 is a schematic front view of a terminal device 100 to which an underscreen biometrics authentication device is applicable, and FIG. 2 is an A′-A′ arrow of the terminal device 100 shown in FIG. 1. It is a schematic partial cross-section structure figure. Specifically, the terminal device 100 is a smartphone, includes a display screen 120 and a biometrics authentication module 140, the display screen 120 has a display area 102, and the biometrics authentication module 140 is below the display screen 120. Is installed in.

The display screen 120 may be a self-luminous display screen, and a self-luminous display unit as a display pixel, for example, an organic light-emitting diode (OLED) display screen or a micro-light-emitting diode (Micro-LED) display screen. As mentioned, in another alternative embodiment, the display screen 120 may be a Liquid Crystal Display (LCD) or other passive light emitting display screen, without limitation thereto. On the other hand, the display screen 120 is specifically a touch display screen, and provides a man-machine interface to the user by detecting not only screen display but also touch or pressing operation by the user. For example, in one embodiment, the terminal device 100 may include a touch sensor, and specifically, the touch sensor may be a touch panel (Touch Panel, TP) and may be installed on the surface of the display screen 120. The touch display screen may be integrated with the display screen 120 partially or wholly.

The biometrics authentication module 140 is specifically an optical biometrics authentication module, for example, an optical fingerprint module, and mainly plays a role of collecting biometrics information (for example, fingerprint image information) of a user. The biometrics authentication module 140 is installed at least in a local area below the display screen 120, and the biometrics collection area (or sensing area) 130 of the biometrics authentication module 140 is at least partially in the display screen 120. Are located in the display area 102 of.

As an example, specifically, the biometrics authentication module 140 includes an optical biometrics sensor including a light detection array, for example, an optical fingerprint sensor, and the light detection array includes a plurality of light detection units, and The area where the light detection array is located is the biometrics collection area 130 of the biometrics authentication module 140. As shown in FIG. 1, since the biometrics collection area 130 is located in the display area 102 of the display screen 120, when the user unlocks the terminal device or performs other biometrics authentication, The biometrics input operation can be performed by simply pressing the biometrics collection area 130 located on the display screen 120 with a finger. Since biometrics collection and detection can be performed inside the display area 102 of the display screen 120, the terminal device 100 having the above structure does not need to arrange a space for installing a fingerprint button (for example, a Home button) on the front side. Therefore, the display area 120 of the display screen 120 can be substantially the entire front surface of the terminal device 100 because it can take the form of a full screen.

1 and 2, the biometrics authentication module is an underscreen optical biometrics authentication module, but in another embodiment, the biometrics authentication of the terminal device 100 is performed. As a module, an ultrasonic wave or other type of biometrics authentication module can also be used, and when it is used in a fingerprint authentication scene, the optical biometrics sensor also corresponds to the ultrasonic fingerprint sensor or other type of biometrics sensor. It may be replaced. In the present application, the type and specific structure of the fingerprint sensor are not particularly limited, and the fingerprint sensor only needs to satisfy the characteristic requirement that fingerprint authentication can be performed inside the display screen of the terminal device.

In the present embodiment, the case where an OLED display screen is used as the display screen 120 is taken as an example, the display screen 120 includes an array of OLED display units, and the biometrics authentication module 140 includes the biometrics authentication module 140. An OLED display unit (that is, an OLED light source) located in the biometrics collection area 130 of the OLED display screen 120 may be an excitation light source for biometrics detection authentication. Of course, in yet another alternative embodiment, the biometrics authentication module 140 may use an internal light source or an external light source to provide the optical signal for biometrics detection authentication. In such a case, the underscreen biometrics authentication device can be applied not only to self-luminous display screens such as OLED display screens, but also to non-self-luminous display screens such as liquid crystal display screens or other passive light emitting display screens. In addition, the photodetection array of the biometrics authentication module 140 is specifically a photodetector array, and includes a plurality of photodetectors distributed in an array, and the photodetector is the photodetector array. It may be a detection unit.

When the finger touches, presses or approaches the biometrics collection area 130 (collectively referred to as pressing in the present application for convenience of description), light from the display unit of the biometrics collection area 130 is reflected by the finger and reflected light. And the reflected light has biometric information of the user's finger. For example, after the light is reflected by the fingerprint on the surface of the user's finger, the reflected light due to the mountain line and the valley line of the fingerprint of the finger is different, so the reflected light has the fingerprint information of the user. The reflected light returns to the display screen 120, is received by the photodetector array of the biometrics authentication module 140 below the display screen 120, and is converted into a corresponding electrical signal, a biometrics detection signal. The terminal device 100 acquires the biometrics information of the user based on the biometrics detection signal, and further performs biometrics matching authentication, thereby completing the identity authentication of the current user and the user of the terminal device 100. Check whether or not you have the authority to perform the corresponding operation.

In another alternative embodiment, the biometrics authentication module 140 is installed over the entire area below the display screen 120 so that the biometrics collection area 130 covers the entire display area 102 of the entire display screen 120. Extends across to enable full-screen biometrics authentication.

In addition, specifically, the terminal device 100 further includes a protective cover plate 110. Specifically, the protective cover plate 110 may be a transparent cover plate such as a glass cover plate or a sapphire cover plate, and is located above the display screen 120 and covers the front surface of the terminal device 100. Further, a protective layer is further installed on the surface of the protective cover plate 110. Therefore, in this embodiment, pressing the display screen 120 with a finger essentially means pressing the surface of the cover plate 110 on the display screen 120 or the protective layer covered by the cover plate 110 with the finger. May also mean.

Meanwhile, a circuit board 150, for example, a flexible printed circuit board (FPC) is further installed under the biometrics authentication module 140, and the biometrics authentication module 140 is welded to the circuit board 150 with a bonding pad. The circuit board 150 electrically connects to other peripheral circuits or other elements of the terminal device 100 to transmit signals. For example, in the biometrics authentication module 140, the circuit board 150 receives a control signal from the processing unit of the terminal device 100, or the circuit board 150 outputs the biometrics detection signal to the processing unit of the terminal device 100. It outputs to a control unit etc.

In one embodiment, a biometrics authentication module is typically adhered to the lower surface of the display screen in a typical underscreen biometrics authentication device. For example, as shown in FIG. 3, the biometrics authentication module 140 is completely fixed to the lower surface of the display screen 120 using an adhesive material 160 in a dispensing manner.

As shown in FIG. 4, in another representative example of the underscreen biometrics authentication device, the lower surface of the protective cover plate 210 is attached to the upper surface of the OLED display screen 220, and the biometrics authentication module 240 includes the adhesive material 230. Is attached to the lower surface of the OLED display screen 220 by a dispensing method, and the lower surface of the biometrics authentication module 240 is fixed to the circuit board 250 by welding. Specifically, the adhesive material 230 is formed on the outer wall of the biometrics authentication module 240 to securely bond and fix the outer wall of the biometrics authentication module 240 and the lower surface of the display screen 220. Further, the lower surface edge of the OLED display screen 220 is attached to the upper surface of the intermediate frame 270 with the foam tape 260, and the intermediate frame 270 has a groove structure in the area where the biometrics authentication module 240 is present. The groove structure provides a clearance space for the biometrics authentication module 240 and the circuit board 250 below the biometrics authentication module 240. Further, the battery 280 may be installed between the intermediate frame 270 and the rear lid 290.

As is clear from the above, although the design structure shown in FIG. 4 realizes the under-display fingerprint authentication, it requires the fastening of the biometrics authentication module and the display screen, and therefore has the following problems.

1. Since the OLED display screen 220 is expensive and very fragile, the OLED display screen 220 is fragile during the process of bonding the biometrics authentication module 240 and the OLED display screen 220 together.

2. If the biometrics authentication module 240 is directly attached to the OLED display screen 220, it is difficult to replace the biometrics authentication module 240, and further, the OLED display screen 220 is easily damaged when the biometrics authentication module 240 is replaced. That is, since the biometrics authentication module 240 and the OLED display screen 220 are integrally bonded, if the biometrics authentication module 240 is damaged, the OLED display is removed when the biometrics authentication module 240 is removed from the lower surface of the OLED display screen 220. Easy to break the screen.

3. The process of attaching the biometrics authentication module 240 directly to the lower surface of the OLED display screen 220 is complicated.

From the above problems, in the production process of the underscreen biometrics authentication device having the above structure, since the yield is low, the cost is high, and the bonding process is complicated, the cost of the terminal device and the complexity are complicated. And maintainability is reduced.

Therefore, in order to solve the above problems, the embodiment of the present invention, in the conventional underscreen biometrics authentication device, the process of bonding the biometrics authentication module and the display screen is complicated, the bonding cost is high, and (EN) Provided is an underscreen biometrics authentication device that can solve problems such as display screen breakage during the matching process and maintenance process.

5 and 6 are schematic configuration diagrams of an underscreen biometrics authentication device according to an embodiment of the present invention. Specifically, as shown in FIG. 5 or 6, the underscreen biometrics authentication device includes a display screen 320 and a biometrics authentication module 340. The display screen 320 may be the OLED display screen 120 shown in FIGS. 1 and 2, and the biometrics authentication module 340 may be the biometrics authentication module 140 shown in FIGS. 1 and 2. .. The biometrics authentication module 340 is fixedly installed below the display screen 220, and a gap 390 exists between the biometrics authentication module 340 and the display screen 320. The biometrics authentication module 340 collects fingerprints or other biometrics, and the biometrics collection area is at least partially located in the display area of the display screen 320 shown. The detailed structure, function, and biometrics detection and authentication process of the display screen 320 and the biometrics authentication module 340 may be referred to the description of the OLED display screen 120 and the biometrics authentication module 140. The description is omitted.

In an embodiment of the present invention, the biometrics authentication module 340 does not directly contact the display screen 320, that is, the biometrics authentication module 340 and the display screen 320 are designed separately, which is a preferred embodiment. As a form, the biometrics authentication module 340 is attached below the display screen 320 by being fixedly connected to an easily removable device inside the terminal device, and the biometrics authentication module 340 and the display screen are attached. There may be a gap 390 between 320 and the easily removable device may be a fixed frame between the biometrics authentication module 340 and the display screen 320. In other words, the biometrics authentication module 340 may be fixedly installed below the display screen 320 in a non-contact manner via another auxiliary element. For example, the biometrics authentication module 340 is fixed to the fixed frame and fixedly installed below the display screen 320 via the fixed frame. As a result, the biometrics authentication module 340 and the display screen 320 do not completely interfere with each other, and the display screen 320 is prevented from being damaged when the biometrics authentication module 340 is attached or detached.

The width of the gap may be greater than or equal to a first distance that is a minimum distance at which the biometrics authentication module 340 and the display screen 320 do not come into contact with each other when the terminal device is in a vibration state such as a drop or a shock. For example, the range of the width of the gap may be 0.5 mm-1 mm. The range is merely an example range of the gap, and the present embodiment is not limited thereto.

As a specific embodiment, when the underscreen biometrics authentication device is used in a mobile terminal (for example, a smartphone), the biometrics authentication module 340 and the display screen 320 may be used in the mobile terminal as shown in FIG. It is fixed below the display screen 320 by an intermediate frame 370 or other member to form a gap 390 between the biometrics authentication module 340 and the display screen 320. In this embodiment, taking the intermediate frame 370 shown in FIG. 5 as an example, the intermediate frame 370 is a fixed frame between the biometrics authentication module 340 and the display screen 320. The intermediate frame 370 is installed between the display screen 320 and the rear lid, and mounts the frames of various internal units therein. The various internal units include batteries, motherboards, cameras, flat cables, various sensors, Includes, but is not limited to, microphones, handsets, and other parts. In the present embodiment, the biometrics authentication module 340 is fixed by the intermediate frame 370, and the gap 390 exists between the biometrics authentication module 340 and the display screen 320. The display screen 320 is completely non-interfering, avoiding damage to the display screen 320 when attaching or detaching the biometrics authentication module 340.

Specifically, the intermediate frame 370 may be made of a metal or alloy material, or may be made of a plastic material. In such a case, the intermediate frame 370 can be integrally molded with the frame of the mobile terminal. So-called integral molding means that the inner intermediate frame and the frame are integrated. For example, the frame may be a simple metal picture frame, or the intermediate frame may be painted with a paint similar to metal. Further, the intermediate frame 370 may be, for example, a composite intermediate frame including an inner intermediate frame 1 and an outer intermediate frame 2, the inner intermediate frame 1 mounting components of a mobile phone, and the outer intermediate frame 2 being an inner intermediate frame. 1 is arranged outside and is equipped with a cell phone button on the outer edge, and the inner intermediate frame 1 and the outer intermediate frame 2 are integrated. The middle frame of the mobile phone is designed as an inner middle frame and an outer middle frame, and the inner middle frame and the outer middle frame are integrated so that when the mobile phone is impacted, the outer middle frame is worn first and then the outer middle frame. The middle frame has only buttons, and the outer middle frame can be easily replaced, which is low cost, and more elastic material may be installed between the inner and outer middle frames, and the inner and outer middle frames are pushed by the elastic force of the elastic layer. Since they are tightened and fixed relative to each other, the impact on the inner intermediate frame is mitigated by the elastic layer when the impact force is applied to the outer intermediate frame.

In the above embodiment, the case where the intermediate frame 370 is a fixed frame is taken as an example, but in another embodiment, the biometrics authentication module 340 is an arbitrary device inside the terminal device that is easily removable. By being fixedly connected, it is attached below the display screen 320 so that a gap 390 exists between the biometrics authentication module 340 and the display screen 320. The biometrics authentication module 340 may be fixedly installed below the display screen 320 in a non-contact manner. In another embodiment, the biometrics authentication module 340 is fixedly mounted on a device such as a back cover of the mobile terminal, a mother board, and a battery, which is easy to remove, and further fixedly installed below the display screen 320.

In an embodiment of the present invention, the biometrics authentication module 340 is installed below the display screen 320 in a contactless manner and does not contact the lower surface of the display screen 320. That is, since the biometrics authentication module 340 and the display screen 320 do not completely interfere with each other, the display screen 320 is prevented from being damaged when the biometrics authentication module 340 is removed. Further, since the biometrics authentication module 340 and the lower surface of the display screen 320 do not come into contact with each other, a constant gap 390 is maintained therebetween, and the gap 390 is an air gap (unfilled with any auxiliary material). the biometrics authentication module 340 contacts the lower surface of the display screen 320 when the display screen 320 is pressed or the terminal device is dropped or shocked. While avoiding this, the biometrics authentication stability and characteristics of the biometrics authentication module 340 are not adversely affected. That is, in this embodiment, by designing the biometrics authentication module 340 and the lower surface of the display screen 320 separately, the difficulty in removing the biometrics authentication module 340 is reduced and the terminal device Maintainability can be improved. Furthermore, in the process of manufacturing the underscreen biometrics authentication device, the complexity of mounting the biometrics authentication module 340 below the display screen 320 is reduced, and the yield of the underscreen biometrics authentication device is improved. , Further reduce the production cost. In addition, the biometrics authentication stability and characteristics of the biometrics authentication module 340 are not adversely affected.

In this embodiment, the biometrics authentication module 340 is fixed to the lower surface of the intermediate frame 370. The biometrics authentication module 340 is installed on the lower surface of the intermediate frame 370, and the intermediate frame 370 allows a gap 390 to exist between the biometrics authentication module 340 and the display screen 320.

As shown in FIG. 5, the edge of the lower surface of the display screen 320 is attached to the upper surface of the intermediate frame 370, and the biometrics authentication module 340 is installed below the display screen 320 and the middle portion. There is a gap 390 fixed to the frame 370 and between the biometrics authentication module 340 and the display screen 320. The edge of the lower surface of the display screen 320 is bonded to the upper surface of the intermediate frame 370, which means that the edge of the lower surface of the display screen 320 and the intermediate frame 370 is the intermediate frame 370. It is meant to be fixedly connected to each other so that it can be attached to the upper surface.

In another alternative embodiment, the biometrics authentication module 340 may be installed on the upper surface of the intermediate frame 370 to maintain a predetermined gap with the display screen 320. In a specific embodiment, a groove structure is formed in a mounting area of the biometrics authentication module 340 of the intermediate frame 370, the intermediate frame 370 is fixed in the groove structure, and the groove structure is biometrics certified. A space for accommodating the module 340 is provided.

Hereinafter, a case where the biometrics authentication module 340 is installed on the lower surface of the intermediate frame 370 will be described as an example. Note that when the biometrics authentication module 340 performs biometrics detection by an optical method, for example, when an optical fingerprint authentication module is used, the biometrics authentication module 340 causes the optical signal from the display screen 320 to be reflected by a finger. It is necessary to detect the reflected light. Therefore, further, when the biometrics authentication module 340 is installed on the lower surface of the intermediate frame 370, the biometrics authentication module 340 can receive the reflected light, in one preferred embodiment, the intermediate frame 370. Has a hole 371 formed in a mounting area of the biometrics authentication module 340, the biometrics authentication module 340 is installed below the hole 371, and the light detection array thereof is provided through the hole 371 to the display screen 320. It is installed facing the lower surface of the. In this embodiment, the size of the hole 371 of the intermediate frame 370 is less than or equal to the size of the biometrics authentication module 340.

With such a structural design, the biometrics authentication module 340 can be directly fixedly connected to the intermediate frame 370. Specifically, the side surface of the biometrics authentication module 340 is fixedly connected to the hole wall of the hole 371, or the upper surface edge of the biometrics authentication module 340 is the lower surface of the intermediate frame 370. Is fixedly connected to a region around the hole 371. In the embodiment of the present invention, the method in which the biometrics authentication module 340 and the intermediate frame 370 are directly fixed and connected is merely an example, and the embodiment of the present invention is not limited thereto. In another embodiment, the biometrics authentication module 340 may be fixedly connected to the intermediate frame 370 by a connecting piece. For example, as shown in FIG. 5, the underscreen biometrics authentication device further includes a module bracket 330 for fixing and connecting both the biometrics authentication module 340 and the intermediate frame 370 as a connection component. For example, the side surface of the biometrics authentication module 340 is fixedly connected to the inner surface of the module bracket 330, or the upper surface edge of the biometrics authentication module 340 is fixed to the lower surface of the module bracket 330. Or the outer surface of the module bracket 330 is fixedly connected to the hole wall of the hole 371, or the upper surface of the module bracket 330 is around the hole 371 on the lower surface of the intermediate frame 370. Is fixedly connected to the region (that is, at the hole opening edge). Alternatively, as shown in FIG. 5, the side surface of the biometrics authentication module 340 is fixed to the inner surface of the module bracket 330, and the top surface edge of the biometrics authentication module 340 and the top surface of the module bracket 330. Is simultaneously fixed to the lower surface of the intermediate frame 370 in the region around the hole 371 (that is, at the hole opening edge). The above-mentioned fixed connection includes, but is not limited to, connection methods such as fixing with screws, fixing with a double-sided tape, fixing with an adhesive, fixing with welding and fixing with bonding.

In this embodiment, the upper surface of the module bracket 330 is higher than the upper surface of the biometrics authentication module 340 to further ensure that there is a gap between the biometrics authentication module 340 and the display screen 320. .. Further, since the upper surface of the module bracket 330 is higher than the upper surface of the biometrics authentication module 340, the biometrics authentication module 340 is fixedly connected to at least one surface of the module bracket 330. As described above, the contact area between the biometrics authentication module 340 and the module bracket 330 is increased, and the biometrics authentication module 340 and the module bracket 330 are fixed by a method of fixing with a double-sided tape or an adhesive. The stability of the fixed connection is enhanced when the connection is made by connecting.

In another embodiment, the module bracket 330 is further provided with a hollow structure in order to increase stability when the biometrics authentication module 340 and the module bracket 330 are fixedly connected. The hollow structure is installed in alignment with the hole 371 of the intermediate frame 370 to provide a storage space for the biometrics authentication module 340, and the biometrics authentication module 340 is at least partially housed in the hollow structure. And then fixed. For example, the side surface of the biometrics authentication module 340 is fixedly connected to the inner surface of the module bracket 330 by the hollow structure. Further, in order to provide a predetermined stability when the biometrics authentication module 340 is fixedly connected to the module bracket 330 by the hollow structure, as an example, the shape of the hollow structure may be the shape of the biometrics module. This is the shape of the metrics authentication module 340. As another example, the cavity structure can be further optimized. For example, the uppermost edge of the hollow structure of the module bracket 330 extends inward to form an annular fixing part, and the upper surface edge of the biometrics authentication module 340 is fixed to the lower surface of the annular fixing part. The upper surface of the fixing portion and the upper surface of the main body of the module bracket 330 are flush with each other. The annular fixing portion of the module bracket 330 allows the biometrics authentication module 340 to be stably connected to the module bracket 330 inside the hollow structure, and in this case, the upper surface of the module bracket 330 is The width of the gap between the display screen 320 and the biometrics authentication module 340 is increased because the height of the biometrics authentication module 340 is higher than the upper surface of the biometrics authentication module 340. In the embodiment of the present invention, the module bracket 330 mainly connects and fixes the biometrics authentication module 340 to the intermediate frame 370, and a gap exists between the biometrics authentication module 340 and the display screen 320. Play a role of In the embodiment of the present invention, the specific structure of the module bracket 330 is not particularly limited.

Further, as the intermediate frame 370 of the terminal device, a metal intermediate frame or an aluminum intermediate frame can be used, and the width of the gap between the display screen 320 and the biometrics authentication module 340 can be reduced due to the thickness excess or deficiency. I cannot meet the requirements. Therefore, in order to ensure a sufficient width of the gap between the biometrics authentication module 340 and the display screen 320 of the embodiment of the present invention, the structure design of the intermediate frame 370 is further optimized in the embodiment of the present invention. Can be converted.

In an actual product, when the thickness of the intermediate frame 370 is thin, as an example, the region where the biometrics authentication module 340 is attached in the intermediate frame 370 is subjected to a thickness increasing process. For example, as shown in FIG. 5, in the intermediate frame 370, a hole 371 is formed at the mounting position, and the edge of the hole 371 of the intermediate frame 370 extends downward to form a protrusion structure. The authentication module 340 is fixed to the lower surface of the protruding structure directly or by the module bracket 330. Further, because of the ease of mounting the biometrics authentication module 340, in a preferred embodiment of the present invention, the outer peripheral region adjacent to the protruding structure is surrounded by the protruding structure on the lower surface of the intermediate frame. A convex ring is formed, the lower surface of the convex ring is higher than the lower surface of the protruding structure, and the biometrics authentication module is fixed in the convex ring. For example, in the embodiment shown in FIG. 5, on the lower surface of the intermediate frame 370, a convex ring surrounding the hole 371 is further installed in the region of the step structure, and the biometrics authentication module 340 includes the intermediate ring 370. Located inside the convex ring after being attached to the frame 370. The convex ring ensures high strength even after thinning the intermediate frame 370 in the outer peripheral region of the hole 371, while protecting the biometrics authentication module 340 inside thereof. In a preferred embodiment, the biometrics authentication module 340 is secured to the convex ring by the module bracket 330. On the other hand, in another embodiment, when the thickness of the intermediate frame 370 is thick, as an example, the attachment area of the biometrics authentication module 340 in the intermediate frame 370 is thinned. For example, as shown in FIG. 6, a groove structure may be installed directly on the lower surface of the intermediate frame 370, and the hole is installed in the groove structure. In other words, on the lower surface of the intermediate frame, at the hole opening edge facing the display screen, the groove structure extends upward, and the biometrics authentication module is fixed to the groove structure.

Further, as shown in FIG. 5, the underscreen biometrics authentication device further includes a cover plate 310, a circuit board 350, and a foam tape 360 when used in a terminal device. The cover plate 310 may be a transparent protective cover plate, such as a glass cover plate or a sapphire cover plate, covering the display screen 320, and the lower surface of the cover plate 310 is the upper surface of the display screen 320 (ie It is attached to the display surface). The circuit board 350 is a printed circuit board or a flexible circuit board and supports the biometrics authentication module 340, and the biometrics authentication module 340 is connected to peripheral elements or external circuits by the circuit board 350. To be done. The lower surface edge of the display screen 320 is attached to the upper surface of the intermediate frame 370 with the foam tape 360. In the present embodiment, the foam tape 360 provides a predetermined distance between the lower surface of the display screen 320 and the upper surface of the intermediate frame 370, except for bonding the display screen 320 and the intermediate frame 370. And has a predetermined thickness of, the distance is part of a gap 390 between the display screen 320 and the biometrics authentication module 340.

On the other hand, when the intermediate frame 370 has a predetermined thickness, in order to utilize the thickness of the intermediate frame 370, the outer peripheral region of the hole 371 should be thinned on the upper surface of the intermediate frame 370. Then, a step structure is formed in the outer peripheral region of the hole, that is, the thickness of the intermediate frame 370 in the outer peripheral region of the hole 371 is made less than the thickness of the main body of the intermediate frame 370. The height difference of the step structure also becomes part of the gap 390 between the display screen 320 and the biometrics authentication module 340. In addition, the hole opening edge of the hole 371 of the intermediate frame 370 facing the display screen 320 can be formed as a tilt angle by a chamfering process, and the tilt angle allows reflected light to pass through the hole 371 of the intermediate frame 370. Helps to enter the biometrics authentication module 340, thereby improving the biometrics detection characteristics and detection efficiency of the underscreen biometrics authentication device. Further, the tilt angle extends to the hole opening edge on the lower surface of the intermediate frame, which is directed away from the display screen, and thus the gap is in a direction perpendicular to the display screen in the plane where the tilt angle is located. Includes projection height.

In the embodiment of the present invention, the biometrics authentication module 340 is fixedly connected to the intermediate frame 370, and it is ensured that a gap exists between the biometrics authentication module 340 and the display screen 320. It In another alternative embodiment, the biometrics authentication module 340 is mounted below the display screen 320 by being fixedly connected to any device that is easily removable inside the terminal device, and A gap 390 may exist between the biometrics authentication module 340 and the display screen 320. For example, in another example, instead of the embodiment of attaching to the intermediate frame 370 shown in FIG. 5, the terminal device using the underscreen biometrics authentication module further comprises a back cover, the biometrics authentication module 340. Are directly or fixedly connected to the rear lid by the module bracket 330.

As can be seen from the above analysis, in the embodiment of the present invention, the biometrics authentication module 340 and the display screen 320 are separately designed, and, for example, the biometrics authentication module 340 is fixed to the intermediate frame 370 or the back cover structural member. As a result, in the conventional under-screen biometrics authentication device, it is difficult to remove the biometrics authentication module 340 by directly bonding the biometrics authentication module 340 to the display screen 320, the display screen 320 is easily broken, and the bonding process is difficult to perform. To do. Further, in the embodiment of the present invention, a gap is formed between the biometrics authentication module 340 and the lower surface of the display screen 320, and the display screen 320 is pressed by the gap or the terminal device. It is ensured that the biometrics authentication module 340 does not come into contact with the lower surface of the display screen 320 under conditions where the display screen 320 is dropped or impacted, and the display screen 320 is prevented from being broken.

The structure of the underscreen biometrics authentication device in the embodiments shown in FIGS. 5 and 6 is merely an example. Specifically, the underscreen biometrics authentication device shown in FIG. 5 or 6 can be similarly applied to a smartphone or other terminal device, and the underscreen biometrics authentication device can be similarly used for the display screen 320 and the biometrics device. An authentication module 340 is provided. The biometrics authentication module 340 can be installed below the display screen 320 in a contactless manner by an intermediate frame 370 inside the terminal device. The cover plate 310 covers the upper surface of the display screen 320, the lower surface edge of the display screen 320 is attached to the upper surface of the intermediate frame 370 with foam tape 360, and the biometrics authentication module is mounted on the circuit board 350. The circuit board 350 is connected to a peripheral element or an external circuit. Further, the intermediate frame 370 is provided with a hole 371, and the biometrics authentication module 340 is provided below the hole 371 so that reflected light returning from the display screen 320 through the hole 371 can be received. .. In the embodiment shown in FIG. 6, the size of the hole 371 of the intermediate frame 370 is larger than the size of the biometrics authentication module 340, and thus the biometrics authentication module 340 is configured by the module bracket 330 to the intermediate frame 370. Need to be fixed to.

Further, as shown in FIG. 6, the biometrics authentication module 340 is attached to the lower surface of the module bracket 330, and the module bracket 330 has an opening 331 (hollow structure). The openings 331 align with each other in the holes 371 of the intermediate frame 370 so that the reflected light passes through the holes 371 of the intermediate frame 370 and the openings 331 of the module bracket 330 and is received by the biometrics authentication module 340. It The distance between the module bracket 330 having the opening 331, the intermediate frame 370 having the hole 371 and the upper surface of the intermediate frame 370 and the lower surface of the display screen 320 is the display screen 320 and the biometrics authentication module 340. Make up the gap between. Alternatively, the biometrics authentication module 340 is mounted inside the opening 331 of the module bracket 330, for example the outer surface of the biometrics authentication module 340 is secured to the inside surface of the opening 331. In addition, the lower surface of the intermediate frame 370 has a groove structure in the peripheral area of the hole 371, the groove structure accommodates the module bracket 330, and the upper surface edge of the module bracket 330 has an intermediate portion. It is fixed to the surface of the groove structure of the frame 370.

The embodiment of the present invention further provides a biometrics authentication unit including a biometrics authentication module and a module bracket, and the biometrics authentication unit, when used in the underscreen biometrics authentication device or the terminal device, directly When the underscreen biometrics authentication device or the biometrics authentication module of the terminal device is damaged when attached to the intermediate frame or the fixed frame of the terminal device, the damaged biometrics authentication unit can be replaced, whereby the underscreen biometrics authentication unit can be replaced. It reduces the complexity of metric authenticator replacement/maintenance and device replacement and reduces damage to the display screen.

FIG. 7 is a schematic block diagram of a biometrics authentication unit according to an embodiment of the present invention. As shown in FIG. 7, the biometrics authentication unit includes a module bracket 330 and a biometrics authentication module 340. Regarding specific structures of the module bracket 330 and the biometrics authentication module 340 and their structural relationships, Since the related description of FIGS. 5 and 6 may be referred to, the redundant description will be omitted here.

It should be noted that the terms used in the embodiments of the present invention and the appended claims are for the purpose of describing the specific embodiments and are not intended to limit the embodiments of the present invention. For example, unless the context clearly indicates otherwise, the singular forms “a”, “above” and “a” used in the embodiments of the invention and the appended claims also include the plural. Including.

It will be apparent to those skilled in the art that each of the exemplary components described based on the embodiments disclosed herein can be implemented as electronic hardware or computer software or a combination of electronic hardware. Whether these functions are executed by hardware or software depends on the specific application of the technical proposal and design restriction conditions. Those skilled in the art can implement the functions described in different methods for specific applications without departing from the scope of the embodiments of the present invention. Those skilled in the art will appreciate that, for convenience of description, the devices and components described above may or may not be physically separate. The objects of the embodiments of the present invention can be realized by using some or all of these members as needed. The above contents are merely the embodiments of the present invention, the protection scope of the embodiments of the present invention is not limited thereto, and those skilled in the art can understand the technical scope disclosed in the embodiments of the present invention. Modifications and substitutions that can be easily conceived without departing from the invention should be included in the protection scope of the embodiments of the present invention. Therefore, the protection scope of the embodiments of the present invention is based on the protection scope of the claims.

Claims (20)

An underscreen biometrics authentication device applicable to a terminal device having a display screen for performing underscreen biometrics detection,
Above the display screen, which is attached to an intermediate frame of the terminal device, is configured to be arranged below the display screen by the intermediate frame, is generated when a finger is illuminated, and has fingerprint information of the finger. A biometrics authentication module including an optical biometrics sensor having a light sensing array for receiving light from a finger and converting the light into an electrical signal,
The biometrics collection area of the biometrics authentication module is in the display area of the display screen, the intermediate frame is formed with holes in the attachment area of the biometrics authentication module, the biometrics authentication module, Removably fixed to the lower surface of the intermediate frame adjacent to the holes to form a gap between the biometrics authentication module and the display screen without contacting the display screen, An underscreen biometrics authentication device, wherein the holes are configured to allow light from a finger on the display screen to pass through the intermediate frame and be received by an optical biometrics sensor. The underscreen bio according to claim 1, wherein the width of the gap is equal to or larger than a first distance that is a minimum distance at which the biometrics authentication module and the display screen do not touch when the terminal device is dropped or impacted. Metric authentication device. The underscreen biometrics authentication device according to claim 2, wherein the range of the width of the gap is 0.5 mm to 1 mm. The underscreen biometrics authentication device of claim 2, wherein the edge of the lower surface of the display screen is attached to the upper surface of the intermediate frame by foam, and the width of the gap comprises the thickness of the foam. On the upper surface of the intermediate frame, the edge of the hole is provided with an inclination angle,
The underscreen biometrics authentication device according to claim 1, wherein a width of a hole on an upper surface of the intermediate frame can be made larger than a width of a hole on a lower surface of the intermediate frame by the inclination angle. The under-screen biometrics of claim 5, wherein the tilt angle is configured to increase a field of view of the biometrics authentication module light so that the biometrics authentication module receives more light from a finger. Authentication device. A lower surface of the intermediate frame extends downward in a peripheral region of the hole to form a protrusion structure, the biometrics authentication module is attached to a lower surface of the protrusion structure, and the protrusion structure is the biometrics authentication. The underscreen biometrics authentication device of claim 5, configured to increase the distance between a module and the display screen. The underscreen biometrics authentication device according to claim 7, wherein a step structure is provided in a peripheral region of the hole on an upper surface of the intermediate frame. The step structure reduces the thickness of the intermediate frame in the peripheral region of the hole to make at least a part of the peripheral region of the hole thinner than the main body of the intermediate frame. The underscreen biometrics authentication device according to claim 8, wherein the underscreen biometrics authentication device has a range that covers the protruding structure on the lower surface of the frame. A convex ring that incorporates the protruding structure is formed on the lower surface of the intermediate frame, the convex ring is located within the range of the step structure, and the biometrics authentication module is fixed in the convex ring. The underscreen biometrics authentication device of claim 8, wherein the lower surface of the convex ring exceeds the lower surface of the protruding structure. The underscreen biometrics of claim 5, wherein a lower surface of the intermediate frame extends upward in a peripheral region of the hole to form a groove structure, and the biometrics authentication module is attached to the groove structure. Authentication device. The underscreen biometrics authentication device according to claim 1, further comprising a module support, wherein the module support functions as a connector for making a fixed connection between the biometrics authentication module and the intermediate frame. .. 13. The underscreen biometrics authentication device according to claim 12, wherein an upper surface of the module support is fixedly connected to a region of a lower surface of the intermediate frame around the hole. The module support is provided on a side surface of the biometrics authentication module, and the upper surface of the module support and the upper surface of the biometrics authentication module are both areas of the lower surface of the intermediate frame around the hole. The underscreen biometrics authentication device according to claim 13, wherein the underscreen biometrics authentication device is fixed to the. A terminal device capable of performing underscreen biometrics detection,
Display screen,
An intermediate frame disposed below the display screen for supporting the display screen;
From the object on the display screen, attached to the intermediate frame of the terminal device, configured to be separated from the display screen, generated when the object is illuminated, and having biometric information of the object. A biometrics authentication module including an optical biometrics sensor having a light sensing array for receiving light and converting the light into an electrical signal,
The intermediate frame has a hole formed in a mounting area of the biometrics authentication module, the biometrics authentication module is provided between the biometrics authentication module and the display screen without contacting the display screen. Removably secured to the lower surface of the intermediate frame adjacent to the hole to form a gap, the hole in the intermediate frame allowing light from an object on the display screen to pass through the intermediate frame. A terminal device configured to allow light to be received by the optical biometrics sensor. The terminal device according to claim 15, wherein the width of the gap is equal to or larger than a first distance that is a minimum distance that the biometrics authentication module and the display screen do not touch when the terminal device is dropped or impacted. On the upper surface of the intermediate frame, the edge of the hole is provided with an inclination angle,
The tilt angle causes a width of a hole on an upper surface of the intermediate frame to be larger than a width of a hole on a lower surface of the intermediate frame to enable the biometrics authentication module to receive more light from an object. 15. The terminal device according to 15. A lower surface of the intermediate frame extends downward in a peripheral region of the hole to form a protrusion structure, the biometrics authentication module is attached to a lower surface of the protrusion structure, and the protrusion structure includes the biometrics authentication. 18. The terminal device according to claim 17, configured to increase the distance between a module and the display screen. The step structure is provided in the peripheral region of the hole on the upper surface of the intermediate frame, and the step structure has a range that covers the protrusion structure on the lower surface of the intermediate frame. Terminal device. A biometrics authentication unit applicable to a terminal device having a display screen and an intermediate frame,
Optical biometrics having a light sensing array for receiving light from an object on the display screen, which is generated when the object is illuminated and has biometrics information of the object, and converting this light into an electrical signal. Equipped with biometrics authentication module including sensor,
The biometrics authentication module is attached to the intermediate frame of the terminal device and is configured to be separated from the display screen, and the intermediate frame is formed with a hole in an attachment area of the biometrics authentication module. , The biometrics authentication module is removable on a lower surface of the intermediate frame adjacent to the hole so as to form a gap between the biometrics authentication module and the display screen without contacting the display screen. Fixed to, and the hole in the intermediate frame configured to allow light from an object on the display screen to pass through the intermediate frame and be received by the optical biometrics sensor. Metric authentication unit.