CN107451554B - Fingerprint module and mobile terminal - Google Patents
Fingerprint module and mobile terminal Download PDFInfo
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- CN107451554B CN107451554B CN201710624084.XA CN201710624084A CN107451554B CN 107451554 B CN107451554 B CN 107451554B CN 201710624084 A CN201710624084 A CN 201710624084A CN 107451554 B CN107451554 B CN 107451554B
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- fingerprint module
- optical
- optical imaging
- imaging glass
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
Abstract
The invention provides a fingerprint module and a mobile terminal, wherein the fingerprint module comprises optical imaging glass, an optical sensor and a substrate which are sequentially stacked; the optical sensor is provided with an optical sensing area, and the optical imaging glass is provided with a first area and at least one second area; the first area and the optical sensing area are arranged oppositely, each second area is arranged to deviate from the optical sensing area, and at least one supporting block is arranged on the optical imaging glass corresponding to at least one second area; the optical sensor is electrically connected with the substrate. According to the invention, the second area deviating from the optical sensing area is arranged on the optical imaging glass, the supporting block is arranged on the second area, and the top surface of the supporting block can form a stable and flat attaching surface, so that the attaching flatness can be ensured when the fingerprint module is attached to the display screen.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a fingerprint module and a mobile terminal.
Background
At present, the fingerprint module that uses among the mobile terminal is mainly capacitanc fingerprint module, when capacitanc fingerprint module sets up in mobile terminal's front surface, needs to occupy the display area. And optical formula fingerprint module is based on the optical imaging principle, and its penetrability is high, can set up in mobile terminal's the front display area. These advantages of the optical fingerprint module make it gradually become the development trend of the fingerprint module for mobile terminals.
Optical imaging glass in the optical type fingerprint module is inconsistent with the coefficient of expansion of other subassemblies, if there is the unevenness in the fingerprint module when laminating with mobile terminal display module, then in the later stage use, the fingerprint module can produce warpage to influence the normal use of fingerprint module.
It is thus clear that current optical fingerprint module exists because of laminating unevenness and warp's problem.
Disclosure of Invention
The embodiment of the invention provides a fingerprint module and a mobile terminal, and aims to solve the problem that an existing optical fingerprint module is warped and deformed due to uneven fit.
In a first aspect, an embodiment of the present invention provides a fingerprint module, including optical imaging glass, an optical sensor, and a substrate, which are stacked in sequence; the optical sensor is provided with an optical sensing area, and the optical imaging glass is provided with a first area and at least one second area; the first area and the optical sensing area are arranged oppositely, each second area is arranged to deviate from the optical sensing area, and at least one supporting block is arranged on the optical imaging glass corresponding to at least one second area; the optical sensor is electrically connected with the substrate.
In a second aspect, an embodiment of the present invention further provides a mobile terminal, including a display screen and the fingerprint module, where the fingerprint module is disposed corresponding to a light emitting area of the display screen, and the top surface of the supporting block of the fingerprint module is attached to the display screen of the mobile terminal.
Therefore, the second area deviating from the optical sensing area is arranged on the optical imaging glass, the supporting block is arranged on the second area, and the top surface of the supporting block can form a stable and flat bonding surface, so that the bonding flatness of the fingerprint module can be ensured when the fingerprint module is bonded with a display screen, and the problem of warping deformation of the existing optical fingerprint module due to uneven bonding is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a fingerprint module according to an embodiment of the present invention;
fig. 2 is a second schematic structural diagram of a fingerprint module according to an embodiment of the present invention;
fig. 3 is a third schematic structural diagram of a fingerprint module according to an embodiment of the present invention;
FIG. 4 is a fourth schematic structural diagram of a fingerprint module according to an embodiment of the present invention;
FIG. 5 is a top view of the fingerprint module configuration provided in FIG. 4;
fig. 6 is a schematic structural view illustrating a structure of a fingerprint module attached to a display screen according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a fingerprint module, which includes an optical imaging glass 1, an optical sensor 2, and a substrate 3 stacked in sequence; the optical sensor 2 is provided with an optical sensing area 21, and the optical imaging glass 1 is provided with a first area 11 and at least one second area 12; the first area 11 is arranged opposite to the optical sensing area 21, each second area 12 is arranged to deviate from the optical sensing area 21, and at least one supporting block 4 is arranged on the optical imaging glass 1 corresponding to at least one second area 12; the optical sensor 2 is electrically connected to the substrate 3.
The optical sensor 2 is electrically connected to the substrate 3, and the specific electrical connection manner can be implemented by Surface Mount Technology (SMT), a connector, a substrate trace, or soldering. The embodiments of the present invention are not particularly limited.
The fingerprint module of the embodiment of the invention is an optical fingerprint module, the fingerprint module can be applied to a mobile terminal, and the working principle is as follows: the light rays are emitted to the finger, and the light with the fingerprint signal is gathered on the optical imaging glass 1 for imaging; the optical sensor 2 senses and collects optical signals, converts the optical signals into electric signals and finishes the acquisition of fingerprint image information; fingerprint image information that optical sensor 2 gathered transmits to the fingerprint chip through base plate 3, and the fingerprint chip carries out the operation to fingerprint image information to realize fingerprint matching and discernment.
In the embodiment of the invention, the optical sensor 2 is provided with an optical sensing area 21, and the optical imaging glass 1 is provided with a first area 11 and at least one second area 12; the first regions 11 are disposed opposite the photo-sensing regions 21, and each of the second regions 12 is disposed offset from the photo-sensing region 21.
The reason for the above arrangement is explained as follows.
Firstly, based on the fingerprint identification principle of the fingerprint module, the optical imaging glass 1 needs to receive the finger fingerprint signal and image, and therefore, the optical imaging glass 1 needs to be provided with an area (namely, a first area 11) for receiving the finger fingerprint signal and imaging; the optical sensor 2 needs to receive imaging information of a fingerprint generated by the optical imaging glass 1, and therefore, the optical sensor 2 needs to be provided with an effective area (i.e., "optical sensing area 21" in the embodiment of the present invention) for receiving the imaging information. To ensure effective reception of the fingerprint imaging information by the optical sensing area 21, the first area 11 and the optical sensing area 21 should be oppositely disposed.
Secondly, based on the problem of uneven bonding existing in the existing optical fingerprint module, the embodiment of the invention obtains a stable and flat bonding surface by arranging the supporting block 4 on the optical imaging glass 1. The arrangement of the supporting block 4 cannot affect the receiving of the imaging information by the optical sensor 2, therefore, the embodiment of the present invention provides the second region 12 deviated from the optical sensing region 21 on the optical imaging glass 1, and the second region 12 is used for arranging the supporting block 4. Here, the number of the supporting blocks 4 may be one, or two or more, and when the number of the supporting blocks is two or more, the thickness of each supporting block 4 should be equal.
The structures of the optical sensor 2 and the optical imaging glass 1 and the positional relationship therebetween include, but are not limited to, four embodiments shown in fig. 1 to 4.
As shown in fig. 1, the optical sensor 2 includes an optical sensing area 21, and the optical imaging glass 1 includes a first area 11 and a second area 12. Wherein the first region 11 is arranged opposite the optical sensing region 21 (or the entire optical sensor 2) and the second region 12 is arranged beyond the edge of the optical sensor 2.
As shown in fig. 2, the optical sensor 2 includes an optical sensing area 21 and a bonding wire area 22, and the optical imaging glass 1 includes a first area 11 and a second area 12. Wherein the first area 11 is arranged opposite to the optical sensing area 21, the second area 12 is arranged beyond the edge of the optical sensor 2, and the bonding wire area 22 is arranged beyond the edge of the optical imaging glass 1.
As shown in fig. 3, the optical sensor 2 includes a vacant region 23, an optical sensing region 21, and a bonding wire region 22 arranged in this order, and the optical imaging glass 1 includes a first region 11 and a second region 12. The first area is arranged opposite to the optical sensing area 21, the second area 12 is arranged opposite to the vacant area 23, and the bonding wire area 22 is arranged beyond the edge of the optical imaging glass 1.
As shown in fig. 4, the optical sensor 2 includes an optical sensing area 21, a vacant area 23, and a bonding wire area 22 arranged in this order, and the optical imaging glass 1 includes a first area 11 and second areas 12 disposed on both sides of the first area 11. The first area is arranged opposite to the optical sensing area 21, the left second area 12 is arranged beyond the edge of the optical sensor 2, the right second area 12 is arranged opposite to the vacant area 23, and the bonding wire area 22 is arranged beyond the edge of the optical imaging glass 1.
As shown in fig. 6, the fingerprint module according to the embodiment of the present invention may be attached to the display screen 5 of the mobile terminal in a specific manner, but not limited to, as follows: transparent bonding material is filled in the thickness space that 4 supporting blocks propped up, bonds fingerprint module and display screen 5 together. Because the thickness of supporting shoe 4 is stable, even transparent bonding material fills unevenness, because the supporting role of supporting shoe 4, also can guarantee the laminating roughness between optical imaging glass 1 and display screen 5. Because optical imaging glass 1, optical sensor 2 and base plate 3 stack the setting in proper order, consequently, optical sensor 2 and base plate 3 all can keep leveling with display screen 5 to effectively avoid the fingerprint module to produce warpage in the use.
In the embodiment of the invention, because the optical imaging glass 1 has better flatness and thermal stability, the supporting block 4 is used for locking the bonding thickness between the optical imaging glass 1 and the display screen of the mobile terminal, the uniformity and the flatness are better, and the bonding unevenness caused by the bonding process can be eliminated. In addition, use 4 locking joint thickness of supporting shoe for the fingerprint module is when laminating with the mobile terminal display screen, the quantity of control joint glue easily.
Therefore, the second area deviating from the optical sensing area is arranged on the optical imaging glass, the supporting block is arranged on the second area, and the top surface of the supporting block can form a stable and flat bonding surface, so that the bonding flatness of the fingerprint module can be ensured when the fingerprint module is bonded with a display screen, and the problem of warping deformation of the existing optical fingerprint module due to uneven bonding is solved.
Optionally, as shown in fig. 4 to 5, the optical imaging glass 1 is provided with at least two second regions 12, the at least two second regions 12 are respectively disposed on at least two sides of the first region 11, and at least one supporting block 4 is disposed on the optical imaging glass 1 corresponding to each second region 12.
In order to improve the stability of laminating between fingerprint module and the mobile terminal display screen, can set up two at least second regions 12 on optical imaging glass 1, every second region 12 sets up at least one supporting shoe 4. Like this, have two regions at least and have the support of supporting shoe 4, the atress of fingerprint module is more stable, balanced, and the laminating between fingerprint module and the mobile terminal display screen is more stable.
Alternatively, as shown in fig. 5, the optical imaging glass 1 is provided with two second regions 12, two opposite sides of the first region 11 are respectively provided with one second region 12, and two supporting blocks 4 are arranged on the optical imaging glass 1 corresponding to each second region 12.
For the embodiment of providing at least two second areas 12 on the optical imaging glass 1, in order to obtain stable and balanced support and properly simplify the structure of the fingerprint module, the optical imaging glass 1 may be provided with one second area 12 on two opposite sides of the first area 11, and two support blocks 4 are provided for each second area 12. Like this, supporting shoe 4 distributes in the both sides of first region 11, makes the atress of fingerprint module more stable, balanced, and the laminating between fingerprint module and the mobile terminal display screen is more stable.
Alternatively, as shown in fig. 5, two support blocks 4 of each second region 12 are provided at intervals.
In this embodiment, two supporting shoe 4 intervals of every second region 12 set up in two second regions 12, and these four supporting shoes 4 can evenly distributed in four positions of optical imaging glass 1, make the atress of fingerprint module more stable, balanced, and the laminating between fingerprint module and the mobile terminal display screen is more stable.
Optionally, as shown in fig. 2 to 6, the optical sensor 2 is further provided with a wire bonding region 22, the wire bonding region 22 is disposed away from the optical imaging glass 1, and the wire bonding region 22 is provided with a metal lead 7 connected to the substrate 3, so as to electrically connect the optical sensor 2 and the substrate 3.
As a specific embodiment, the optical sensor 2 is electrically connected to the substrate 3 through a metal lead 7.
Alternatively, as shown in fig. 1 to 4 and 6, the optical imaging glass 1 and the optical sensor 2 are bonded by a light-transmitting bonding material 8.
In order to ensure the stability of the relative position between the optical imaging glass 1 and the optical sensor 2, in the present embodiment, the optical imaging glass 1 and the optical sensor 2 may be bonded by a light-transmissive bonding material 8. Wherein, the light-transmitting bonding material 8 can be glue.
Optionally, as shown in fig. 1 to 4 and 6, the fingerprint module further includes an encapsulation layer 9, the fingerprint module is encapsulated into a whole by the encapsulation layer 9, and the encapsulation layer 9 is deposited below the top surface of the supporting block 4.
In this embodiment, the encapsulation layer 9 is sunk below the top surface of the supporting block 4, so that the encapsulation layer 9 does not damage the flatness of the top surface of the supporting block 4.
In addition, as shown in fig. 6, the embodiment of the present invention further relates to a mobile terminal, which includes a display screen 5 and any one of the fingerprint modules, wherein the fingerprint module is disposed corresponding to the light emitting area of the display screen 5, and the top surface of the supporting block 4 of the fingerprint module is attached to the display screen 5 of the mobile terminal.
The light-emitting area of the display screen 5 includes the display area of the display screen 5, or the light-emitting area of the display screen 5 other than the display area, for example, the light-emitting area where the virtual key is located, the light-emitting area where the front flash is located, and the like. Here, the light of the light-emitting region becomes a light source of the fingerprint module.
The attaching mode of the fingerprint module and the mobile terminal display screen 5 may be combined with the mode in the foregoing embodiment of the present invention, and details of this embodiment are not repeated in order to avoid repetition.
Optionally, the fingerprint module corresponds the display area setting of display screen 5.
In the embodiment of the invention, the fingerprint module is arranged corresponding to the display area of the display screen 5, so that the light emitted by the display area becomes the light source of the fingerprint module. To this mode of setting up, the fingerprint module can not occupy the display area of display screen 5, is favorable to enlarging the area in display area.
Optionally, the space intussuseption between optical imaging glass 1 of fingerprint module and display screen 5 is filled with printing opacity bonding material 8, and the fingerprint module bonds through printing opacity bonding material 8 and display screen 5.
Wherein the light-transmissive bonding material 8 may be glue.
The mobile terminal may include: at least one of a cell phone, a tablet computer, an electronic book reader, an MP3 player, an MP4 player, a speaker, a digital camera, a laptop portable computer, a car computer, a desktop computer, a set-top box, a smart television, a wearable device.
Referring to fig. 7, fig. 7 is a block diagram of a mobile terminal provided in the implementation of the present invention.
As shown in fig. 7, the mobile terminal 700 includes a Radio Frequency (RF) circuit 710, a memory 720, an input unit 730, a display unit 740, a processor 750, an audio circuit 760, a communication module 770, a power supply 780, and a fingerprint module 790.
Wherein, fingerprint module 790 includes: the optical imaging glass, the optical sensor and the substrate are sequentially stacked; the optical sensor is provided with an optical sensing area, and the optical imaging glass is provided with a first area and at least one second area; the first area and the optical sensing area are arranged oppositely, each second area is arranged to deviate from the optical sensing area, and at least one supporting block with the same thickness is arranged on the optical imaging glass corresponding to at least one second area; the optical sensor is electrically connected with the substrate.
Optionally, the optical imaging glass is provided with at least two second regions, the at least two second regions are respectively arranged on at least two sides of the first region, and at least one supporting block is arranged on the optical imaging glass corresponding to each second region.
Optionally, the optical imaging glass is provided with two second regions, two opposite sides of the first region are respectively provided with one second region, and two supporting blocks are arranged on the optical imaging glass corresponding to each second region.
Optionally, two support blocks of each second area are arranged at intervals.
Optionally, the optical sensor is further provided with a wire bonding area, the wire bonding area is offset from the optical imaging glass, and a metal lead connected with the substrate is arranged on the wire bonding area to realize the electrical connection between the optical sensor and the substrate.
Optionally, the optical imaging glass and the optical sensor are bonded by a light-transmitting bonding material.
Optionally, the fingerprint module further includes an encapsulation layer, the fingerprint module is encapsulated into a whole through the encapsulation layer, and the encapsulation layer is deposited below the top surface of the supporting block.
Optionally, the fingerprint module corresponds to a light emitting area of a display screen of the mobile terminal, and the top surface of the supporting block of the fingerprint module is attached to the display screen.
Optionally, the fingerprint module corresponds to a display area of the display screen.
Optionally, the fingerprint module the optical imaging glass with the space intussuseption between the display screen is filled with printing opacity bonding material, the fingerprint module passes through printing opacity bonding material with the display screen bonds.
The input unit 730 may be used, among other things, to receive numeric or character information input by a user and to generate signal inputs related to user settings and function control of the mobile terminal 700. Specifically, in the embodiment of the present invention, the input unit 730 may include a touch panel 731. The touch panel 731, also referred to as a touch screen, can collect touch operations of a user (e.g. operations of the user on the touch panel 731 by using a finger, a stylus pen, or any other suitable object or accessory) thereon or nearby, and drive the corresponding connection device according to a preset program. Alternatively, the touch panel 731 may include two portions of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 750, and can receive and execute commands sent by the processor 750. In addition, the touch panel 731 may be implemented by various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 731, the input unit 730 may include other input devices 732, and the other input devices 732 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.
The display unit 740 may include a display panel 741, and optionally, the display panel 741 may be configured in the form of L CD or Organic light Emitting Diode (Organic L light-Emitting Diode, O L ED), etc.
It should be noted that the touch panel 731 can cover the display panel 741 to form a touch display screen, and when the touch display screen detects a touch operation on or near the touch display screen, the touch display screen is transmitted to the processor 750 to determine the type of the touch event, and then the processor 750 provides a corresponding visual output on the touch display screen according to the type of the touch event.
The touch display screen comprises an application program interface display area and a common control display area. The arrangement modes of the application program interface display area and the common control display area are not limited, and can be an arrangement mode which can distinguish two display areas, such as vertical arrangement, left-right arrangement and the like. The application interface display area may be used to display an interface of an application. Each interface may contain at least one interface element such as an icon and/or widget desktop control for an application. The application interface display area may also be an empty interface that does not contain any content. The common control display area is used for displaying controls with high utilization rate, such as application icons like setting buttons, interface numbers, scroll bars, phone book icons and the like.
The processor 750 is a control center of the mobile terminal 700, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal 700 and processes data by operating or executing software programs and/or modules stored in the first memory 721 and calling data stored in the second memory 722, thereby integrally monitoring the mobile terminal 700. Alternatively, processor 750 may include one or more processing units.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The fingerprint module is characterized by comprising optical imaging glass, an optical sensor and a substrate which are sequentially stacked; the optical sensor is provided with an optical sensing area, and the optical imaging glass is provided with a first area and at least two second areas; the first region and the optical sensing region are oppositely arranged, each second region is deviated from the optical sensing region, at least two supporting blocks are arranged on the optical imaging glass corresponding to at least two second regions, and the at least two supporting blocks are symmetrically arranged relative to the central line of the optical imaging glass; the optical sensor is electrically connected with the substrate, the fingerprint module further comprises a packaging layer, the fingerprint module is packaged into a whole through the packaging layer, and the packaging layer is sunk below the top surface of the supporting block.
2. The fingerprint module of claim 1, wherein the at least two second regions are respectively disposed on at least two sides of the first region, and at least one supporting block is disposed on the optical imaging glass corresponding to each second region.
3. The fingerprint module of claim 2, wherein the optical imaging glass is provided with two second areas, one second area is respectively provided on two opposite sides of the first area, and two supporting blocks are provided on the optical imaging glass corresponding to each second area.
4. The fingerprint module of claim 3, wherein the two support blocks of each second area are spaced apart.
5. The fingerprint module of any one of claims 1 to 4, wherein the optical sensor is further provided with a wire bonding area, the wire bonding area is disposed away from the optical imaging glass, and a metal lead connected to the substrate is disposed on the wire bonding area to electrically connect the optical sensor and the substrate.
6. The fingerprint module of any one of claims 1 to 4, wherein the optical imaging glass is bonded to the optical sensor by a light-transmissive bonding material.
7. A mobile terminal, comprising a display screen and the fingerprint module set according to any one of claims 1 to 6, wherein the fingerprint module set is disposed corresponding to a light emitting area of the display screen, and the top surface of the supporting block of the fingerprint module set is attached to the display screen of the mobile terminal.
8. The mobile terminal of claim 7, wherein the fingerprint module is disposed corresponding to a display area of the display screen.
9. The mobile terminal according to claim 7, wherein a space between the optical imaging glass and the display screen of the fingerprint module is filled with a light-transmitting adhesive material, and the fingerprint module is adhered to the display screen through the light-transmitting adhesive material.
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| CN201710624084.XA CN107451554B (en) | 2017-07-27 | 2017-07-27 | Fingerprint module and mobile terminal |
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| CN201710624084.XA CN107451554B (en) | 2017-07-27 | 2017-07-27 | Fingerprint module and mobile terminal |
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| CN107451554B true CN107451554B (en) | 2020-07-21 |
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| CN105303178B (en) * | 2015-10-26 | 2019-06-25 | 苏州科阳光电科技有限公司 | Light conducting plate structure for fingerprint collecting light source |
| CN205264683U (en) * | 2015-11-09 | 2016-05-25 | 华天科技（西安）有限公司 | Cushion adds underfill's fingerprint chip packaging structure |
| CN105912168A (en) * | 2016-04-22 | 2016-08-31 | 上海与德通讯技术有限公司 | Display module, electronic equipment and fingerprint unlock method |
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| CN104537349A (en) * | 2014-12-25 | 2015-04-22 | 上海箩箕技术有限公司 | Optical fingerprint imaging system and electronic product |
| CN105304575A (en) * | 2015-10-23 | 2016-02-03 | 华天科技（西安）有限公司 | Packaging structure adopting cushion block to prevent inclination of fingerprint sensing chip and manufacturing method |
| CN106156584A (en) * | 2016-06-17 | 2016-11-23 | 东莞市纳利光学材料有限公司 | A kind of full screen fingerprint touch-control unlocks display floater and unlocking method |
| CN106295606A (en) * | 2016-08-19 | 2017-01-04 | 维沃移动通信有限公司 | A kind of fingerprint recognition assembly, fingerprint recognition module and mobile terminal |
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