WO2018152906A1

WO2018152906A1 - Hidden fingerprint identification apparatus, adhesive dispensing method and terminal

Info

Publication number: WO2018152906A1
Application number: PCT/CN2017/077251
Authority: WO
Inventors: 古蒋林; 刘海永
Original assignee: 华为技术有限公司
Priority date: 2017-02-27
Filing date: 2017-03-20
Publication date: 2018-08-30

Abstract

Disclosed is a hidden fingerprint identification apparatus, comprising: a touch screen and a fingerprint identification device; the touch screen comprises a cover glass, the reverse side of which is provided with a first fingerprint blind slot; the fingerprint identification device is provided in the first fingerprint blind slot; the width of the fingerprint identification device is smaller than that of the first fingerprint blind slot, and the height of the fingerprint identification device is larger than the depth of the first fingerprint blind slot; the fingerprint identification device is adhered to the bottom surface of the first fingerprint blind slot by means of a first adhesive; and the fingerprint identification device is adhered to the slot wall of the first fingerprint blind slot by means of a second adhesive. Embodiments of the present invention also provide corresponding adhesive dispensing method and terminal. By means of the technical solution of the present application, the fingerprint identification device is not only adhered to the bottom surface of the first fingerprint blind slot, and is also adhered to the slot wall of the first fingerprint blind slot, so that firm adhesion of the fingerprint identification device is improved, and failure caused by falling off is avoided.

Description

Concealed fingerprint identification device, dispensing method and terminal

This application claims the priority of the Chinese Patent Application, filed on Feb. 27, 2017, the Chinese Patent Application No. PCT Application No. In this application.

Technical field

The present invention relates to the field of terminal technologies, and in particular, to a hidden fingerprint identification device, a dispensing method, and a terminal.

Background technique

Fingerprint recognition technology has been widely used in attendance systems and security systems in recent years. No matter which field the fingerprint recognition technology is applied, it relies on the principle of fingerprint recognition for fingerprint recognition. The principle of fingerprint recognition is to collect the fingerprint of the user in advance, and then compare the newly collected fingerprint with the pre-stored fingerprint when using, and if the newly collected fingerprint matches the pre-stored fingerprint, it passes the verification.

With the rapid development of the terminal, fingerprint recognition technology is applied to the terminal for fingerprint unlocking. At present, the common fingerprint unlocking method is to perform fingerprint unlocking by, for example, the fingerprint unlocking key shown in FIG. 1. The principle of fingerprint unlocking shown in FIG. 1 is as shown in FIG. 2A. The fingerprint unlocking key includes a fingerprint cover, a metal ring and a fingerprint chip. When the finger touches the fingerprint cover, the fingerprint forms a capacitance with the electrode inside the fingerprint chip, and the fingerprint of the valley has a different intensity. The fingerprint image is simulated by signal processing; if the fingerprint detected by the fingerprint sensor matches the pre-stored fingerprint, the fingerprint is triggered. The switch unlocks the phone screen.

The mounting method of the fingerprint sensor shown in FIG. 2A requires a through hole on the cover glass of the touch screen at the bottom of the terminal. The schematic diagram of the structure of the touch screen can be understood by referring to FIG. 2B. As shown in FIG. 2B, the structure of the touch screen is Top to bottom are cover glass, ink layer, Electromagnetic Compatibility (EMC) protective layer and pixel array layer, etc., which are not shown in other layered diagrams 2B. Opening a through hole is to open a through hole in the uppermost cover glass shown in FIG. 2B, so that the installation of the fingerprint sensor can be realized. The installation method of the through hole is complicated to assemble, has the risk of water entering, and has assembly tolerances. Appearance effect. Therefore, the Invisible Fingerprint Sensor (IFS) has appeared. IFS is to stick the fingerprint sensor on the reverse side of the cover glass. It does not need to open a through hole, which can simplify the assembly steps, improve the waterproofness and enhance the appearance. The reliability of the scheme of directly attaching the fingerprint sensor to the cover glass is risky, and the fingerprint chip is easily detached from the cover glass when it is dropped or impacted by a heavy object, resulting in malfunction.

Summary of the invention

In view of the problem that the fingerprint sensor is easily detached from the screen and causes the fingerprint sensor to malfunction, the embodiment of the present application provides a hidden fingerprint recognition device, and the fingerprint recognition device is not only pasted on the bottom surface of the first fingerprint blind groove of the cover glass of the touch screen, It will be stuck in the groove wall of the first fingerprint blind groove, which enhances the firmness of the fingerprint identification device and avoids the malfunction caused by falling off. The embodiment of the present application also provides a corresponding dispensing method and terminal.

The first aspect of the present application provides a hidden fingerprint identification device, including: a touch screen and a fingerprint recognition device, the touch screen includes a cover glass; the first surface of the cover glass is provided with a first fingerprint blind slot; the fingerprint recognition device is disposed at the first In the fingerprint blind slot, the width of the fingerprint recognition device is smaller than the width of the first fingerprint blind slot, and the height of the fingerprint recognition device is greater than the depth of the first fingerprint blind slot; the fingerprint identification device is bonded to the bottom surface of the first fingerprint blind slot by the first partial colloid The fingerprint identification device is bonded to the groove wall of the first fingerprint blind groove by the second partial colloid. Where the cover glass is the upper touch of the touch screen The glass that protects the screen, the reverse side of the cover glass refers to the side facing the inside of the terminal, and the front side of the cover glass is the side facing the user for the user to touch. The first part of the colloid and the second part of the colloid are usually the same kind of colloid, and the two are only different parts of the dispensing, and of course, different colloids can be used as long as the fingerprint identification device can be firmly bonded. It can be seen from the above first aspect that the fingerprint identification device is not only pasted on the bottom surface of the first fingerprint blind groove of the cover glass, but also stuck in the groove wall of the first fingerprint blind groove, thereby enhancing the firmness of the fingerprint identification device. Avoid failure due to shedding.

In conjunction with the first aspect, in a first possible implementation manner, a second fingerprint blind slot is formed in a region of the front surface of the touch screen corresponding to the first fingerprint blind slot. The second fingerprint blind slot refers to an area for the user to input a fingerprint when unlocking, and a second fingerprint blind slot is disposed on the front surface of the touch screen, which not only facilitates the user to directly unlock in the designated area, but also improves the unlocking efficiency, and sets a shallow on the touch screen. The grooves also enhance the aesthetics of the screen and enhance the user's visual and tactile experience. The shape of the second fingerprint blind groove can be designed from an aesthetic point of view without defining a shape.

In conjunction with the first possible implementation of the first aspect, in a second possible implementation, the first fingerprint blind slot is opened on the opposite side of the non-display area in the cover glass. The first fingerprint blind slot can be opened in both the display area and the non-display area, but the difficulty of unlocking the fingerprint in the non-display area is relatively low in the display area.

In conjunction with the first aspect, the first or second possible implementation of the first aspect, in a third possible implementation, the first portion of the colloid has a thickness of less than 20 microns. The first part of the gel is too thick, which will result in poor fingerprint recognition. Less than 20 microns will help to quickly identify the fingerprint.

With reference to the first aspect, the first aspect or the second possible implementation manner of the first aspect, in a fourth possible implementation, the second partial colloid is filled in the first fingerprint blind slot except the fingerprint identification device . The first part of the colloid adheres to the bottom surface of the fingerprint recognition device and the first fingerprint blind groove. Since the width of the first fingerprint blind groove is larger than the fingerprint identification device, the fingerprint identification device is inserted into the first fingerprint blind groove, so the first fingerprint is blind. A part of the slot is not filled, and the second part of the gel is used to fill the area other than the fingerprint identification device, which is more advantageous for fixing the fingerprint identification device in the first fingerprint blind slot, which is beneficial to improving the stability of the fingerprint identification device.

With reference to the first aspect, the first or the second possible implementation manner of the first aspect, in a fifth possible implementation manner, the fingerprint identification device is a capacitive fingerprint identifier or an ultrasonic fingerprint identifier. The capacitive fingerprint recognizer can accurately identify the user's fingerprint under normal circumstances. The ultrasonic fingerprint recognizer can accurately recognize the user's fingerprint in the case of dirty fingers or wet fingers, and the ultrasonic fingerprint recognizer can improve the success rate of fingerprint recognition.

A second aspect of the present application provides a dispensing method for a concealed fingerprint identification device, comprising: first dispensing between a fingerprint identification device and a first fingerprint blind slot, and bonding the first portion through the first point of colloid bonding a fingerprint recognition device and a bottom surface of the first fingerprint blind slot, wherein the first fingerprint blind slot is opened on a reverse side of the cover glass of the touch screen of the terminal, the width of the fingerprint recognition device is smaller than the width of the first fingerprint blind slot, and the height of the fingerprint recognition device a depth greater than a depth of the first fingerprint blind groove; a second dispensing between the fingerprint identification device and the first fingerprint blind groove, and a second portion of the second portion of the gel bonding the fingerprint identification device and the first fingerprint blind groove Slot wall. The cover glass is the glass that protects the touch screen from the upper layer of the touch screen, and the reverse side of the cover glass refers to the side facing the inside of the terminal, and the front surface of the cover glass is the side facing the user for the user to touch. The first part of the colloid and the second part of the colloid are usually the same kind of colloid, and the two are only different parts of the dispensing, and of course, different colloids can be used as long as the fingerprint identification device can be firmly bonded. It can be seen from the above second aspect that, by the first dispensing, the fingerprint identification device is pasted on the bottom surface of the first fingerprint blind groove of the cover glass, After the second dispensing, the fingerprint identification device is also stuck in the groove wall of the first fingerprint blind groove, which enhances the firmness of the fingerprint identification device and avoids the malfunction caused by the falling off.

In conjunction with the second aspect, in a first possible implementation, the second dispensing is to fill the second portion of the gel into the first fingerprint blind slot in addition to the fingerprint recognition device. Because the width of the first fingerprint blind slot is larger than the fingerprint identification device, the fingerprint recognition device is advantageously placed in the first fingerprint blind slot. Therefore, after the first dispensing, a portion of the first fingerprint blind slot is not filled, and the second portion is not filled. Part of the gel fills the area other than the fingerprint recognition device, which is more advantageous for fixing the fingerprint recognition device in the first fingerprint blind slot, which is beneficial to improving the stability of the fingerprint recognition device.

In combination with the second aspect or the first possible implementation of the second aspect, in a second possible implementation, the dispensing speed and the amount of glue dispensed are controlled such that the thickness of the first portion of the colloid is less than 20 microns. The first part of the gel is too thick, which will result in poor fingerprint recognition. Less than 20 microns will help to quickly identify the fingerprint.

A third aspect of the present application provides a terminal, comprising the hidden fingerprint identification device described in the first aspect or any possible implementation manner of the first aspect.

The present invention applies a concealed fingerprint identification device produced by two dispensing methods. The fingerprint identification device is adhered to the bottom surface of the first fingerprint blind groove by the first part of the colloid; the fingerprint identification device passes through the groove of the second partial colloid and the first fingerprint blind groove. Wall bonding. In this way, the fingerprint identification device is not only pasted on the bottom surface of the first fingerprint blind groove, but also stuck in the groove wall of the first fingerprint blind groove, which enhances the firmness of the fingerprint identification device and avoids the malfunction caused by the falling off.

DRAWINGS

1 is a schematic diagram of a terminal including a fingerprint unlocking key;

2A is an exploded perspective view of a fingerprint unlocking key;

2B is a schematic diagram of a layered structure of the touch screen;

3 is a schematic diagram of a terminal interface of a hidden fingerprint unlocking in the embodiment of the present application;

4 is a schematic diagram of another terminal interface of a hidden fingerprint unlocking in the embodiment of the present application;

FIG. 5 is a schematic diagram of another terminal interface of a hidden fingerprint unlocking according to an embodiment of the present application;

6 is a schematic diagram of a touch screen of a device for unlocking a fingerprint in the embodiment of the present application;

7 is a schematic diagram of a concealed fingerprint identification device for dispensing for the first time in the embodiment of the present application;

FIG. 8 is a schematic diagram of a second-time dispensing hidden fingerprint identification device according to an embodiment of the present application; FIG.

FIG. 9 is another schematic diagram of a touch screen of a hidden fingerprint identification device according to an embodiment of the present application; FIG.

FIG. 10 is another schematic diagram of a touch screen of a hidden fingerprint identification device according to an embodiment of the present application; FIG.

11A is a schematic diagram of an embodiment of a method for dispensing a hidden fingerprint identification device according to an embodiment of the present application;

FIG. 11B is a schematic diagram of another embodiment of a dispensing method of a hidden fingerprint identification device according to an embodiment of the present application; FIG.

11C is a schematic diagram of another embodiment of a dispensing method of a hidden fingerprint identification device according to an embodiment of the present application;

FIG. 12 is a schematic diagram of all aspects of a terminal in an embodiment of the present application.

detailed description

The embodiments of the present invention are described below in conjunction with the drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The technical solutions provided by the embodiments of the present invention are applicable to similar technical problems as the terminal is developed.

Embodiments of the present invention provide a hidden fingerprint recognition device, in which a fingerprint recognition device is not only pasted on a cover glass The bottom surface of the first fingerprint blind groove is also stuck in the groove wall of the first fingerprint blind groove, which enhances the firmness of the fingerprint identification device and avoids the malfunction caused by the falling off. The embodiment of the present application also provides a corresponding dispensing method and terminal. The details are described below separately.

A fingerprint is a line created by unevenness on the front surface of a human finger. The lines are regularly arranged to form different patterns. The starting point, end point, joint point and bifurcation point of the line are called minutiae of the fingerprint.

Fingerprint, because of its lifetime immutability, uniqueness and convenience, has become almost synonymous with biometric recognition. At the moment of rapid development of biotechnology, fingerprint recognition technology has been widely used in many fields.

Fingerprint recognition technology generally refers to pre-reading a fingerprint image of a user through a fingerprint recognition device, and then extracting features from the fingerprint image, extracting a plurality of key point information from the fingerprint image, and then saving the key point information. In the process of subsequent fingerprint recognition, the fingerprint image of the user is read again, and then the feature image of the fingerprint image read again is extracted, and the key point information extracted this time is obtained, and the key point information extracted this time is pre-stored. The key point information is compared. If the similarity between the extracted key point information and the pre-stored key point information satisfies the set threshold, the same user can be determined to pass the verification.

After years of development of fingerprint recognition equipment, the accuracy of fingerprint recognition is getting higher and higher. The development of fingerprint identification devices may include the following generations.

The first generation of fingerprint recognition equipment belongs to the fingerprint recognition system relying on optical fingerprint recognition system. Because the light cannot penetrate the surface of the skin, it can only scan the surface of the finger skin, or scan to the dead skin layer, but can not penetrate the dermis layer. . Therefore, in this case, the cleanness of the surface of the finger directly affects the effect of the recognition. If there is more dust on the user's finger, an identification error may occur. Moreover, if people follow a finger and make a fingerprint model, it is also possible to identify the system, which is not very safe and stable for the user.

The second-generation fingerprint identification device relies on capacitive sensor for fingerprint recognition. The capacitive sensor technology uses the principle of capacitance to detect fingerprints. The sensitivity of capacitive fingerprint detection is high, but the identification efficiency is affected when the finger is dirty or the finger is wet.

The second generation fingerprint identification device belongs to the bio-radio fingerprint identification technology, and the ultrasonic fingerprint recognition device belongs to a device in the bio-radio fingerprint identification technology.

Ultrasonic fingerprint reader emits a small amount of radio frequency signal through the sensor itself, penetrates the skin layer of the finger to detect the texture of the dermis layer, and obtains the best fingerprint image. Therefore, the difficulty of fingers such as dry fingers, sweaty fingers, dirty fingers, etc. can be as high as 99%, and the ability of anti-counterfeiting fingerprints is strong, which fundamentally eliminates the problem of artificial fingerprints, and is suitable for areas that are particularly cold or particularly hot.

The fingerprint reader is widely used in terminals such as mobile phones and computers. Taking mobile phones as an example, fingerprint unlocking has been widely used. In order to improve waterproof performance, an Invisible Fingerprint Sensor (IFS) is applied to the terminal. The IFS is to place the fingerprint sensor below the thickness of the touch screen, so that it is not necessary to install the fingerprint sensor by opening a through hole in the cover glass of the touch screen in the manner shown in FIGS. 1 and 2A.

The first fingerprint blind slot can be opened in both the display area and the non-display area, but the difficulty of unlocking the fingerprint in the non-display area is relatively low in the display area. The first fingerprint blind groove is opened on the reverse side of the non-display area of the cover glass in the touch screen, and can be understood by referring to FIGS. 3 to 5. Figure 3 is a schematic diagram of a terminal. A fingerprint sensor may be disposed under the area A shown on the cover glass of the terminal 10 in FIG. 3, and when the user unlocks the fingerprint, as shown in the figure As shown in 4, only the touch on area A is required. At the area A, there will be a fingerprint such as shown in Fig. 5. The fingerprint sensor under the cover glass will collect the fingerprint at the area A for fingerprint identification. If the fingerprint is successfully matched, the fingerprint sensor will trigger the unlock switch. When unlocked, the user can use the terminal normally. The cover glass in Figures 3 to 5 does not need to be provided with a through hole, so it is a whole from the appearance of the terminal, and it is not necessary to provide a stainless steel detection ring. Just mark the touch area in a more aesthetic way.

The relationship between the cover glass in the embodiment of the present application and the fingerprint recognition device disposed under the thickness of the cover glass will be described below with reference to the accompanying drawings.

As shown in FIG. 6 , the first fingerprint blind groove 1011 is opened on the reverse surface of the cover glass 101 of the touch screen of the terminal 10 , and the reverse surface of the cover glass 101 in the embodiment of the present application is below the thickness of the cover glass 101 , first The fingerprint blind groove 1011 includes a bottom surface 10111 and a groove wall 10112.

As shown in FIG. 7, the fingerprint recognition device 102 is disposed in the first fingerprint blind groove 1011, and is bonded to the bottom surface 10111 of the first fingerprint blind groove 1011 through the first partial colloid 103. The width of the fingerprint recognition device 102 is smaller than the width of the first fingerprint blind slot 1011, and the height of the fingerprint recognition device 102 is greater than the depth of the first fingerprint blind slot 1011. The depth of the first fingerprint blind groove 1011 refers to the depth from the notch of the first fingerprint blind groove 1011 to the bottom surface 10111, and may also be referred to as the height of the first fingerprint blind groove.

The fingerprint identification device 102 is adhered to the bottom surface 10111 of the first fingerprint blind slot 1011 through the first partial colloid 103. In order to enhance the adhesion of the fingerprint identification device 102 and the first fingerprint blind slot 1011, as shown in FIG. The device 102 is bonded to the groove wall 10112 of the first fingerprint blind groove 1011 by the second partial colloid 104. Thus, the top surface of the fingerprint recognition device 102 is not only bonded to the bottom surface 10111 of the first fingerprint blind groove 1011, and the faces of the fingerprint recognition device 102 opposite to the groove wall 10112 are adhered to the groove wall 10112 by the second partial colloid 104. In the embodiment of the present application, the second portion of the colloid 104 substantially fills the area of the first fingerprint blind slot except the fingerprint identification device. In this way, the firmness of the fingerprint identification device is further enhanced, and the malfunction caused by the falling off is avoided.

The first part of the colloid and the second part of the colloid are usually the same kind of colloid, and the two are only different parts of the dispensing, and of course, different colloids can be used as long as the fingerprint identification device can be firmly bonded.

In the embodiment of the present application, as shown in FIG. 9, the second fingerprint blind slot 1012 is opened on the front side of the cover glass, that is, the user-facing side, so that the user can directly unlock the second fingerprint blind slot 1012. Setting a shallow groove on the cover glass can also improve the aesthetics of the screen and improve the user's visual and tactile experience. As shown in FIG. 10, the user can directly perform the unlocking operation through the second fingerprint blind slot 1012 on the terminal 10. The second fingerprint blind groove 1012 shown in FIG. 10 is slightly recessed, and may not be imaged as shown in FIG. 10, but the unlocking design as long as it is concave on the cover glass belongs to the concept of the present application.

In the embodiment of the present application, the second fingerprint blind slot is only for the convenience of providing the user to determine the unlocking area, and the design is mainly aesthetic, and only needs to set a shallow depth for the user to recognize, and the shape of the second fingerprint blind slot can be Designed from an aesthetic point of view, there is no need to define a shape.

In the embodiment of the present application, the thickness of the first partial colloid is less than 20 micrometers. Because the first part of the colloid is too thick, the fingerprint is not well recognized, so less than 20 microns is advantageous for quick fingerprint recognition.

In the embodiment of the present application, the fingerprint identification device is a capacitive fingerprint identifier or an ultrasonic fingerprint identifier. Capacitive fingerprint readers can accurately identify user fingerprints under normal conditions. Ultrasonic fingerprint readers are dirty fingers or wet. In the case of a finger, the fingerprint of the user can also be accurately recognized, and the ultrasonic fingerprint reader can improve the success rate of fingerprint recognition.

The above-mentioned FIG. 3 to FIG. 10 illustrate the hidden fingerprint identification device provided by the embodiment of the present application. The cover glass and the fingerprint identification device of the hidden fingerprint identification device provided by the embodiments of the present application are firmly bonded, and the following is attached. The figure describes a dispensing method of the hidden fingerprint recognition device in the embodiment of the present application.

As shown in FIG. 11A, the first dispensing is performed on the bottom surface 10111 of the first fingerprint blind groove 1011 of the cover glass 101, and the colloid to the bottom surface 10111 is referred to as a first partial colloid 103, and then, as shown in FIG. 11B, The fingerprint recognition device 102 is attached to the first partial colloid 103. The fingerprint recognition device 102 and the bottom surface 10111 of the first fingerprint blind groove 1011 are bonded by the first portion of the first portion of the colloid 103, wherein the first fingerprint blind groove 1011 is opened on the opposite side of the cover glass 101 of the terminal 10, and the fingerprint is recognized. The width of the device 102 is smaller than the width of the first fingerprint blind slot 1011, and the height of the fingerprint recognition device 102 is greater than the depth of the first fingerprint blind slot 1011.

Then, as shown in FIG. 11C, in the first fingerprint blind groove 1011, the area other than the fingerprint identifier 102 is subjected to the second dispensing, and the second dispensing of the colloid is referred to as the second partial colloid 104. The fingerprint recognition device 102 and the groove wall 10112 of the first fingerprint blind groove 1011 are bonded by the second partial glue 104 that is inserted a second time.

Wherein, the reverse side of the cover glass refers to the side facing the inside of the terminal, and the front side of the cover glass is the side facing the user for the user to touch. The first part of the colloid and the second part of the colloid are usually the same kind of colloid, and the two are only different parts of the dispensing, and of course, different colloids can be used as long as the fingerprint identification device can be firmly bonded. It can be known from the above second aspect that the fingerprint identification device is pasted on the bottom surface of the first fingerprint blind groove by the first dispensing, and the fingerprint identification device is also pasted on the groove wall of the first fingerprint blind groove by the second dispensing. In the middle, the firmness of the fingerprint identification device is enhanced, and the malfunction caused by falling off is avoided.

In the embodiment of the present application, the dispensing speed and the amount of glue dispensed may be controlled by a dispensing device such that the thickness of the first portion of the colloid is less than 20 microns. The first part of the gel is too thick, which will result in poor fingerprint recognition. Less than 20 microns will help to quickly identify the fingerprint.

In the embodiment of the present application, by using the dispensing method described in FIG. 11A to FIG. 11C, the hidden fingerprint identification device provided by the embodiment of the present application can be dispensed, thereby enhancing the firmness of the fingerprint identification device and avoiding the sticking. Failure due to falling off.

As shown in FIG. 12, the embodiment of the present application further provides a terminal, which includes the hidden fingerprint identification device provided by the embodiment of the present application, such as the hidden fingerprint identification device shown in FIG. 8. Thus, the present application The terminal provided by the embodiment is firmly adhered by the fingerprint recognition device, so the sensitivity of the fingerprint recognition is high, and the fingerprint recognition efficiency is high.

The concealed fingerprint identification device, the dispensing method and the terminal provided by the embodiments of the present invention are described in detail above. The principles and implementation manners of the present invention are described in the specific examples. The description of the above embodiments is only used for To help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in specific embodiments and application scopes. It should not be construed as limiting the invention.

Claims

A hidden fingerprint identification device, comprising:

a touch screen and a fingerprint recognition device, the touch screen comprising a cover glass;

a first fingerprint blind groove is formed on a reverse side of the cover glass;

The fingerprint identification device is disposed in the first fingerprint blind slot, the width of the fingerprint identification device is smaller than the width of the first fingerprint blind slot, and the height of the fingerprint recognition device is greater than the first fingerprint blind slot depth;

The fingerprint identification device is bonded to a bottom surface of the first fingerprint blind groove by a first partial colloid;

The fingerprint identification device is bonded to the groove wall of the first fingerprint blind groove by a second partial colloid.
The concealed fingerprint recognition device according to claim 1, wherein a second fingerprint blind groove is formed in a region of the front surface of the cover glass corresponding to the first fingerprint blind groove.
The concealed fingerprint recognition device according to claim 2, wherein the first fingerprint blind groove is opened on a reverse side of the non-display area in the cover glass.
A concealed fingerprint recognition device according to any of claims 1-3, wherein the first partial colloid has a thickness of less than 20 microns.
The concealed fingerprint identification device according to any one of claims 1 to 3, wherein the second partial colloid is filled in an area of the first fingerprint blind slot other than the fingerprint recognition device.
The concealed fingerprint identification device according to any one of claims 1-3, wherein the fingerprint identification device is a capacitive fingerprint reader or an ultrasonic fingerprint reader.
A dispensing method for a hidden fingerprint identification device, comprising:

Disposing a first time between the fingerprint identification device and the first fingerprint blind slot, bonding the fingerprint identification device and the bottom surface of the first fingerprint blind slot by the first partial glue that is first inserted, wherein The first fingerprint blind slot is opened on the reverse side of the cover glass of the touch screen of the terminal, the width of the fingerprint identification device is smaller than the width of the first fingerprint blind slot, and the height of the fingerprint identification device is greater than the first fingerprint blind slot. depth;

a second dispensing between the fingerprint identification device and the first fingerprint blind slot, and bonding the fingerprint identification device and the slot of the first fingerprint blind slot by a second partial glue that is secondly inserted wall.
The dispensing method according to claim 7, wherein the second dispensing is filling the second partial colloid into an area of the first fingerprint blind slot other than the fingerprint identification device. .
A dispensing method according to claim 7 or 8, wherein

The dispensing speed and the amount of glue dispensed are controlled such that the first portion of the colloid has a thickness of less than 20 microns.
A terminal, comprising: the hidden fingerprint recognition device according to any one of claims 1-6.