CN207965907U - A kind of fingerprint recognition module, touching display screen and mobile terminal - Google Patents

Abstract

The embodiment of the utility model provides a fingerprint identification module, a touch display screen and a mobile terminal, including a metal installation ring, and a fingerprint cover plate, a fingerprint identification chip and a flexible circuit board sequentially fixed in the metal installation ring. The metal mounting ring is also provided with a step structure and a skirt structure, the thickness of the metal mounting ring is less than or equal to the sum of the thicknesses of the fingerprint cover, the fingerprint recognition chip and the flexible circuit board, and the fingerprint recognition is realized by using the metal mounting ring The assembly of the module reduces the overall thickness of the fingerprint recognition module, and the thickness just meets the height of the gap space formed between the touch panel and the display component. The fingerprint recognition module can be placed in the gap, thereby shortening the display. The distance between the area and the fingerprint identification module increases the screen-to-body ratio, and realizes that under the limitation of ultra-thin terminals, the layout of the full screen of the terminal can be easily completed, thereby enhancing the overall competitiveness of the product.

Description

A fingerprint identification module, touch display screen and mobile terminal

technical field

The utility model relates to the field of fingerprint module design of terminal equipment, in particular to a fingerprint recognition module, a touch display screen and a mobile terminal.

Background technique

With the rapid development of mobile smart terminal technology, users have an increasing demand for mobile smart terminals, and at the same time have higher and higher requirements for mobile smart terminal experience. Biometric technology is also being continuously applied to mobile smart terminals. Among them, fingerprint identification technology is one of the technologies that manufacturers and consumers are most concerned about in the current terminal authentication technology. Moreover, with the continuous improvement of mobile payment security requirements, fingerprint recognition modules will become an essential device for mobile intelligent communication terminals, mobile payment terminals and other equipment.

However, based on the development trend of ultra-thin terminals, in the prior art, due to the thickness, the fingerprint recognition module needs to be arranged side by side with the display module chip along the direction perpendicular to the thickness of the display screen, which will make the fingerprint recognition module and the display If the non-display area between areas is too large, the user experience is not good, and it is also not conducive to the layout of the full screen. In order to highlight the full-screen effect, the existing full-screen product layout has to place the fingerprint recognition module on the back cover, which is not conducive to improving the overall competitiveness of the product, especially for high-end flagship phones with standard front fingerprint recognition. , it is even more difficult to require further ultra-thinning.

At present, there are two main ways to reduce the distance between the fingerprint module and the display area:

Solution 1. The display chip is reversed to the back of the display through the COF method. This method has no mass production experience at present, the process is immature, and the mass production conditions are not available. The existing ones are in COB form.

Solution 2. The display screen is inverted, and the display chip is placed above the display area. This way makes the fingerprint module and the display chip staggered, effectively reducing the distance between the fingerprint module and the display area. However, if the display is upside down, the IC position of the display and the single-layer glass area will coincide with the position of the rear camera. When it falls, it will cause the display to break and affect the display effect.

Utility model content

The fingerprint recognition module, the touch display screen and the mobile terminal provided by the embodiment of the utility model mainly solve the technical problem: because the overall thickness of the existing fingerprint recognition module is too large, under the limitation of ultra-thinning of the terminal, It is difficult to realize the layout of the full screen of the terminal, thereby reducing the overall competitiveness of the product.

In order to solve the above technical problems, the embodiment of the present invention provides a fingerprint recognition module, including: a metal mounting ring, and a fingerprint cover, a fingerprint recognition chip and a flexible circuit board sequentially fixed in the metal mounting ring, the The thickness of the metal mounting ring is less than or equal to the sum of the thicknesses of the fingerprint cover, the fingerprint identification chip and the flexible circuit board; the metal mounting ring includes a step structure and a skirt structure, wherein the step structure is arranged on the metal mounting ring. On the inner side of the ring, the skirt structure is arranged on the side of the outer side of the metal mounting ring away from the display component.

The embodiment of the utility model also provides a touch display screen, including: a touch panel, a display component, and the above-mentioned fingerprint identification module;

The display component is arranged on the back of the touch panel, and a gap space is formed at the lower end between the display component and the touch panel, and the height of the gap space is greater than or equal to the fingerprint cover , the sum of the thicknesses of the fingerprint recognition chip and the flexible circuit board; the fingerprint recognition module is arranged on the gap space.

The embodiment of the present utility model also provides a mobile terminal, including: the above-mentioned touch display screen.

The beneficial effects of the utility model are:

According to the fingerprint recognition module, the touch display screen and the mobile terminal provided by the embodiments of the present utility model, the fingerprint recognition module includes a metal installation ring, and a fingerprint cover plate, a fingerprint recognition chip and a fingerprint recognition chip sequentially fixed in the metal installation ring. A flexible circuit board, the thickness of the metal mounting ring is less than or equal to the sum of the thicknesses of the fingerprint cover, the fingerprint identification chip and the flexible circuit board, and a step structure and a skirt structure are also provided on the metal mounting ring, The overall thickness of the fingerprint recognition module is reduced by assembling with a metal mounting ring whose thickness is less than or equal to the sum of the thickness of the fingerprint cover, the fingerprint recognition chip and the flexible circuit board, and the thickness just satisfies the formation between the touch panel and the display component. The height of the gap space, the fingerprint recognition module can be set in the gap, thereby shortening the distance between the display area and the fingerprint recognition module, increasing the screen-to-body ratio, and realizing the ultra-thin terminal limit. , and can also easily complete the layout of the full screen of the terminal, thereby improving the overall competitiveness of the product and the user experience.

Description of drawings

FIG. 1 is a schematic structural view of a touch display sheet provided in an embodiment of the present invention;

Fig. 2 is the enlarged schematic diagram of part A in Fig. 1;

3 is a schematic structural diagram of a touch panel provided by an embodiment of the present invention;

Fig. 4 is the structural schematic diagram of the fingerprint identification module provided by the embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a flexible circuit board provided by an embodiment of the present invention;

Fig. 6 is a schematic structural diagram of a fingerprint identification component provided by an embodiment of the present invention;

Fig. 7 is a schematic structural view of the metal mounting ring provided by the embodiment of the present invention;

Figure 8 is an overall schematic diagram of the assembled fingerprint recognition module provided by the embodiment of the present invention;

Fig. 9 is a schematic structural diagram of the fingerprint identification module assembled on the touch panel according to the embodiment of the present invention;

FIG. 10 is a structural schematic diagram of the prior art after the fingerprint identification module is assembled on the touch panel;

Fig. 11 is another structural schematic diagram of the metal mounting ring provided by the embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the embodiments of the utility model will be further described in detail below through the specific implementation modes combined with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Embodiment one:

In order to solve the problem that the full screen can also use the front fingerprint, the utility model mainly provides a fingerprint recognition module that can meet the front matching of the full screen by changing the design of some fingerprint modules, and combines the fingerprint recognition module with the display screen The chips are placed at intervals along the thickness direction of the display screen, thereby shortening the distance between the display area and the fingerprint identification module, increasing the screen-to-body ratio, and highlighting the advantages of the full screen.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a touch display screen provided by an embodiment of the present invention. The touch display screen 100 includes a touch panel 10, a display assembly 20 and a fingerprint recognition module 30, wherein the display assembly 20 It is arranged on the back of the touch panel 10, and forms a gap space 40 between the display assembly 20 and the lower end of the touch panel 10, the height of the gap space 40 is greater than or equal to the fingerprint recognition The overall thickness of the module 30, the fingerprint identification module 30 is disposed in the gap space 40, and is in contact with the touch panel 10, as shown in FIG. 2 .

As shown in FIG. 3 , the touch panel 10 includes: a display area 101, and a non-display area 102 arranged around the display area; the gap space 40 is located below the non-display area 102, and in the A fingerprint positioning through hole 105 is also provided in the non-display area 102 at a position corresponding to the gap space 40 . The display area 101 refers to the middle area of the touch panel 10, while the non-display area 102 refers to the area surrounding the display area 101, wherein the touch panel 10 needs to be made of a material with higher hardness, which can be made of glass, The front surface 103 of the touch panel 10 can also be pasted with a protective film to prevent the panel from being broken or scratched when dropped, and the rear surface 104 is used to set the display assembly 20 .

In practical applications, a fingerprint positioning through hole 105 is provided at the lower end of the touch panel 10, mainly for the convenience of installing the fingerprint identification module 30. Preferably, the fingerprint positioning through hole 105 is disposed on the On the non-display area 102 at the lower end of the touch panel 10 , the position of the fingerprint positioning through hole 105 on the non-display area 102 corresponds to the position of the gap space 40 .

In this embodiment, the display component 20 includes a display screen 201 and a display chip 202, the display screen 201 is pasted on the display area 101 through a transparent optical glue 203, and the display chip 202 is arranged on the display screen 201 and the non-display area 102 of the touch panel 10 in the gap space 40 .

In practical applications, the display screen chip 202 can transmit information to the display screen 201 through a line, so that the display screen 201 displays corresponding images or text information. The display area 101 corresponds to the display screen assembly 20 , through which the user can check the information displayed on the display screen 201 .

In practical applications, an adhesive layer is also provided between the touch panel 10 and the skirt of the fingerprint identification module 30, that is to say, the fingerprint identification module 30 is fixed on the touch panel 10. When the lower end position of the lower end position, specifically, the adhesive fixation is realized through the adhesive glue layer.

As shown in Figure 4, the fingerprint recognition module 30 includes a fingerprint cover 301, a fingerprint recognition chip 302, a flexible circuit board 303 and a metal mounting ring 304, wherein the thickness of the metal mounting ring 304 is less than or equal to that of the fingerprint cover. The sum of the thicknesses of the board 301, the fingerprint recognition chip 302 and the flexible circuit board 303;

The fingerprint cover 301, the fingerprint identification chip 302 and the flexible circuit board 303 are sequentially superimposed on the inner ring of the metal installation ring 304, and the inner ring of the metal installation ring 304 is connected to the fingerprint cover 301 or the inner ring of the metal installation ring 304. The back side of the fingerprint identification chip 302 is contacted and connected; the fingerprint cover 301 and the fingerprint identification chip 302 are fixed to each other by transparent optical glue 203; on one side of the flexible circuit board 303, at least two connections The pad 305, as shown in FIG. 5, the fingerprint recognition chip 302 is electrically connected to the connection pad 305 through its pins.

In order to facilitate the installation and fixing of the fingerprint cover 301, the fingerprint identification chip 302, and the flexible circuit board 303, a step structure 309 and a skirt structure 308 are also provided in the metal mounting ring 304 provided in this embodiment, wherein the step structure 308 It is arranged on the inner side of the metal installation ring 304, and the skirt structure 309 is arranged on the side of the outer side of the metal installation ring 304 away from the display assembly 20. In practical applications, the step The structure 309 is arranged around the inner side of the metal installation ring 304 , and may also be arranged only at four symmetrical positions on the inner side of the metal installation ring 304 .

In this practical application, the metal mounting ring 304 can be made of aluminum alloy, stainless steel and other materials. Compared with the previous metal mounting ring design, the utility model has been improved, and the metal mounting ring 304 near the side of the display screen 201 has been trimmed deal with. The fingerprint cover 301 can be made of glass, ceramics, sapphire and other materials, and ink is usually printed on the back of the fingerprint cover 301 to form different ID effects. A fingerprint recognition chip 302 is placed under the fingerprint cover 301, and the fingerprint recognition chip 302 has a sensing pixel array facing the surface of the user's finger for collecting user fingerprint information. The light-transmitting optical glue 203 is mainly used to paste the fingerprint cover 301 and the fingerprint identification chip 302, which can be OCA glue or UV water glue. The fingerprint recognition chip 302 is connected to the flexible circuit board 303 through the pad 305 .

In practical application, since the hardness of the flexible circuit board 303 is very small, it is difficult to realize support only by the fingerprint cover plate 301 and the fingerprint identification chip 302. Therefore, the fingerprint identification module 30 provided by the utility model is also provided with a reinforcement panel 306 , the reinforcing panel 306 is arranged on the back of the flexible circuit board 303, and is fixed to each other by double-sided adhesive tape. Preferably, the reinforcing panel 306 is required to be made of a hard conductive material, which may be stainless steel.

In order to control the overall thickness of the fingerprint recognition module 30, the fingerprint recognition chip 302 used in this embodiment is an ultra-thin fingerprint recognition chip with a sensing pixel array arranged on the side facing the user's finger.

In this embodiment, an elliptical mounting hole 307 is provided in the middle of the metal mounting ring 304 , and the stepped structure 309 is provided at the middle and lower edge of the side of the elliptical mounting hole 307 .

In this embodiment, the metal mounting ring 304 includes an oval mounting hole 307 disposed in the middle of the metal mounting ring 304, and a skirt 308 disposed outside the oval mounting hole 307, the skirt The edge 308 is used to install the fingerprint identification module 30 on the touch panel 10 of the mobile terminal.

In practical applications, the metal mounting ring 304 is arranged in an elliptical structure, at this time, the skirt structure 308 extends outward along the long side of the elliptical structure, or it can also be arranged only on the short side of the elliptical structure. on both sides of the edge, as shown in Figure 11.

Preferably, the stepped structure 309 is a protrusion formed by extending the inner edge of the elliptical mounting hole 307 toward the center of the circle, and is in contact with the fingerprint cover 301 or the back of the fingerprint recognition chip 302 , That is, the step structure 309 and the inner side of the metal mounting ring 304 form a step-shaped structure, and the fingerprint recognition chip 302 is just installed on the step. Specifically, by dispensing glue on the inner step structure 309 of the metal mounting ring 304 and pasting the fingerprint identification chip 302 or the fingerprint cover 301, as shown in Figure 3, and then dotting the sealant along the edge of the reinforcing panel 306 to achieve sealing and waterproofing effect.

In this embodiment, the above-mentioned assembly design of the touch display screen and the fingerprint identification module is specifically implemented in the following manner:

First, the fingerprint recognition chip 302 and the flexible circuit board 303 are fixed through the pad 305, the fingerprint recognition chip 302 and the fingerprint cover 301 are fixed through the transparent optical glue 203, and the reinforcing panel 306 is connected to the flexible circuit board 302 through the conductive glue. Thus, a fingerprint identification component 50 is obtained, as shown in FIG. 6 .

Then, the skirt structure 308 of the metal mounting ring 304 is trimmed, specifically, the skirt on the side close to the display assembly 20 is cut off, and the skirt on the side away from the display assembly 20 is reserved, finally obtaining a structure similar to "convex" The metal mounting ring 304 with a ""-shaped structure, dispensing glue on the inner edge step of the oval mounting hole 307 in the metal mounting ring 304, as shown in the shaded part of Fig. Fixed in the oval mounting hole 307.

In another embodiment of the present utility model, for the fixed setting of the fingerprint identification module 30, in addition to the above-mentioned skirt structure setting, it can also be fixed by screws, specifically through the fingerprint identification module. Threaded holes are provided on the reinforcement panel, and the fingerprint identification module is fixed on the touch panel through the cooperation of the threaded holes and the screws.

Further, after the assembly is completed, to enhance the waterproof effect of the module, it is necessary to apply a circle of waterproof glue along the periphery of the reinforcement panel 306 to seal and waterproof 310, so far the assembly of the entire fingerprint recognition module 30 is completed, as shown in FIG. 8 .

Further, paste the outer skirt 308 of the metal mounting ring 304 on the rear surface 104 of the touch panel 10 with glue, and put the fingerprint recognition module 30 into the fingerprint positioning through hole 105 of the touch panel 10. The fingerprint recognition module 30 and the touch panel 10 is fixed by adhesive glue, and after fixing, a circle of sealant is applied along the outer skirt structure 308 of the metal installation ring 30 to play a waterproof role, as shown in FIG. 9 .

Finally, the display assembly 20 is bonded to the rear surface of the touch panel 10 through the transparent optical adhesive 203, as shown in FIG. The gap space 40, and the fingerprint identification module 30 provided in this embodiment is installed in the gap space 40, the fingerprint identification module 300 and the display chip 202 are placed at intervals, which is different from the previous vertical distribution, which can effectively reduce the display The distance between the area 101 and the non-display area 102 of the fingerprint identification module 30 .

By adopting the fingerprint recognition module provided by the utility model to carry out the layout of the full screen, the proportion of the screen can be effectively increased, and the display effect of the full screen can be improved. In the prior art, as shown in Figure 10, in the conventional fingerprint design scheme, the thickness of the fingerprint module is relatively thick, and it needs to be designed side by side with the fingerprint recognition module and the display chip along the direction perpendicular to the thickness of the display screen, so that the fingerprint module The distance between the display area and the display area will be relatively large, and the whole machine will be lengthened. By adopting the fingerprint identification module of this embodiment, it can be assembled in the gap space between the touch panel and the display chip, which not only does not affect the touch screen. The overall thickness can also save the occupied space of the non-display area, thereby reducing the length of the non-display area of the whole machine, and the shortened length is used to increase the length of the display area, which further improves the screen ratio. In the test Among them, the length of the reduced non-display area can reach 4.9mm, that is, the non-display area between the fingerprint identification module and the display area can be reduced by 4.9mm.

The utility model also provides a mobile terminal, the mobile terminal includes the touch display screen provided above, and the touch display screen includes the fingerprint identification module provided above, since the mobile terminal adopts the touch screen The display screen, therefore, also solves the technical problem that it is difficult to realize the layout of the terminal's full screen due to the excessive overall thickness of the existing fingerprint identification module and the limitation of ultra-thin terminals.

To sum up, the fingerprint recognition module, the touch display screen and the mobile terminal provided by the embodiments of the present utility model, the fingerprint recognition module includes a fingerprint cover, a fingerprint recognition chip arranged under the fingerprint cover, and a fingerprint recognition chip arranged under the fingerprint recognition The flexible circuit board under the chip, and the metal mounting ring used to sequentially install the above-mentioned fingerprint cover, fingerprint recognition chip and flexible circuit board, adopt a thickness less than or equal to the sum of the thickness of the fingerprint cover, fingerprint recognition chip and flexible circuit board Assembled with a metal mounting ring, the overall thickness of the fingerprint recognition module is reduced, and the thickness just meets the height of the gap space formed between the touch panel and the display component, and the fingerprint recognition module can be placed in the gap, thereby shortening the The distance between the display area and the fingerprint identification module increases the screen-to-body ratio, and realizes that under the limitation of ultra-thin terminals, the layout of the full screen of the terminal can be easily completed, thereby improving the overall competitiveness of the product, and users use experience.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned utility model embodiment can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed among multiple computing devices. Optionally, they can be implemented with program codes executable by a computing device, so that they can be stored in a computer storage medium (ROM/RAM, magnetic disk, optical disk) to be executed by a computing device, and in In some cases, the steps shown or described may be performed in a different order than here, or they may be fabricated separately as individual integrated circuit modules, or multiple modules or steps thereof may be fabricated as a single integrated circuit module. accomplish. Therefore, the invention is not limited to any specific combination of hardware and software.

The above content is a further detailed description of the embodiments of the utility model in combination with specific implementation modes, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For a person of ordinary skill in the technical field to which the utility model belongs, without departing from the concept of the utility model, some simple deduction or substitutions can also be made, which should be regarded as belonging to the protection scope of the utility model.

Claims (10)

1. a kind of fingerprint recognition module, which is characterized in that including：Metal mounting ring, and it is in turn secured to the metal installation The thickness of fingerprint cover board, fingerprint recognition chip in ring and flexible PCB, the metal mounting ring is less than or equal to the finger The sum of the thickness of line cover board, fingerprint recognition chip and flexible PCB；The metal mounting ring includes step structure and shirt rim knot Structure, wherein the step structure is set on the inner side edge of the metal mounting ring, the skirt border structure is set to the metal The outer side edges of mounting ring are away from the side of display module.

2. fingerprint recognition module according to claim 1, which is characterized in that the fingerprint recognition chip is towards user The ultra-thin fingerprint recognition chip of sensor pixel array is provided on the side of finger.

3. fingerprint recognition module according to claim 2, which is characterized in that the fingerprint recognition module further includes reinforcement face Plate, the reinforcement panel is set to the back side of the flexible PCB, and is fixed to each other by double faced adhesive tape.

4. fingerprint recognition module according to any one of claims 1 to 3, which is characterized in that in the metal mounting ring Oval mounting hole is additionally provided on centre position, the step structure is set to following in the oval mounting hole side Edge position.

5. fingerprint recognition module according to claim 4, which is characterized in that the step structure is to be pacified by the ellipse The inner edge for filling hole is formed by protrusion to center location extension, and with the fingerprint cover board or the back of the body of the fingerprint recognition chip Face connects.

6. a kind of touching display screen, which is characterized in that including：Touch panel, display module and any one of such as claim 1 to 5 The fingerprint recognition module；

The display module is set to the back side of the touch panel, and between the display module and the touch panel Lower end position forms a gap space, and the height of the gap space is greater than or equal to the fingerprint cover board, fingerprint recognition core The sum of the thickness of piece and flexible PCB；The fingerprint recognition module is set on the gap space.

7. touching display screen according to claim 6, which is characterized in that the touch panel includes：Display area, and It is arranged and the non-display area of the display area peripheral position；The gap space is located at below the non-display area, and In the non-display area fingerprint location through-hole is additionally provided on position corresponding with the gap space.

8. touching display screen according to claim 7, which is characterized in that the display module includes display screen and display core Piece, the display screen are pasted onto by transparent optical cement on the display area, and the display chip is set to the display screen In gap space between the non-display area of the touch panel.

9. touching display screen according to claim 8, which is characterized in that in the touch panel and the fingerprint recognition mould It is additionally provided with bonding glue-line between the shirt rim of group.

10. a kind of mobile terminal, which is characterized in that including：Such as claim 6 to 9 any one of them touching display screen.