WO2017080416A1

WO2017080416A1 - Fingerprint sensing apparatus and terminal device

Info

Publication number: WO2017080416A1
Application number: PCT/CN2016/104842
Authority: WO
Inventors: 郝奇毅
Original assignee: 深圳市汇顶科技股份有限公司
Priority date: 2015-11-09
Filing date: 2016-11-07
Publication date: 2017-05-18
Also published as: CN205121587U

Abstract

A fingerprint sensing apparatus and a terminal device. The fingerprint sensing apparatus comprises a fingerprint identification chip (10), a printed circuit board (20) and a metal outer ring (30). The fingerprint identification chip (10) is provided with a capacitive button channel pin (11). The printed circuit board (20) is provided with a welding pad area (C). The welding pad area (C) is electrically connected to the capacitive button channel pin (11).

Description

Fingerprint sensing device and terminal device

Technical field

The present patent application relates to the field of fingerprint recognition technology, and in particular to a fingerprint sensing device and a terminal device.

Background technique

With the popularity of fingerprint sensing devices on mobile phones, fingerprint sensing devices are also integrated with many functions. One of the most basic functions is to implement touch button functions on the fingerprint sensing device. The conventional solution relies on the fingerprint detection capability of the sensing area of the fingerprint sensing device to implement the touch button function, but other exposed areas outside the sensing area have no touch operation response capability.

The touch response area of the existing fingerprint sensing device is small, which affects the user experience.

Summary of the invention

The main purpose of some embodiments of the present patent application is to provide a fingerprint sensing device and a terminal device, which are intended to expand the touch response area of the fingerprint sensing device.

To achieve the above objective, some embodiments of the present patent application provide a fingerprint sensing device including a fingerprint identification chip, a printed circuit board and a metal outer ring, the fingerprint identification chip having a capacitive button channel pin, and the printed circuit board Having a pad area, the pad area Electrically connecting the capacitive button channel pins.

Wherein, the fingerprint identification chip has a capacitive button channel pin, and the printed circuit board has a pad area.

The fingerprint identification chip has at least two capacitive button channel pins, and the printed circuit board has a pad area, and the pad area is electrically connected to each of the capacitor button channel pins.

The at least two capacitive button channel pins are evenly distributed.

The pad area is distributed around the periphery of the fingerprint identification chip.

The fingerprint identification chip has at least two capacitive button channel pins, and the printed circuit board has at least two pad regions, and each pad region is electrically connected to a capacitor button channel pin.

Wherein the fingerprint identification chip comprises a core portion and a peripheral portion, the capacitive button channel pin extends from the core portion, the peripheral portion has a pad region, the pad region and the capacitive button channel tube The foot is electrically connected.

Wherein, when there are at least two pad regions of the capacitor button channel pin and the peripheral portion, the pad region of each peripheral portion is electrically connected to a capacitor button channel pin.

Wherein the metal outer ring is electrically connected to the pad region.

Some embodiments of the present patent application provide a terminal device including a fingerprint sensing device, the fingerprint sensing device including a fingerprint identification chip, a printed circuit board and a metal outer ring, the fingerprint identification chip having a capacitive button channel pin The printed circuit board has a pad area electrically connected to the capacitor button channel pin.

A fingerprint sensing device provided by some embodiments of the present patent application is characterized in that a capacitor button channel pin is added to a fingerprint identification chip thereof, and a pad region is added to a peripheral portion of the printed circuit board or/and the fingerprint identification chip. The pad area is electrically connected to the capacitor button channel pin, so that the pad area also has a touch operation response capability, and the touch response area of the fingerprint sensing device is extended from the sensing area of the core portion of the fingerprint identification chip to The peripheral portion of the printed circuit board or/and the fingerprint identification chip, even extending to the metal outer ring of the fingerprint sensing device, greatly expands the touch response area of the fingerprint recognition device, thereby expanding more shortcut key operation functions and improving the function. user experience.

DRAWINGS

1 is a schematic structural view of a general fingerprint sensing device;

2 is a schematic structural view of a first embodiment of a fingerprint sensing device of the present patent application;

3 is a schematic structural view of a second embodiment of a fingerprint sensing device of the present patent application;

4 is another schematic structural view of a second embodiment of the fingerprint sensing device of the present patent application;

FIG. 5 is still another schematic structural view of a second embodiment of the fingerprint sensing device of the present patent application; FIG.

6 is a schematic structural view of a third embodiment of a fingerprint sensing device of the present patent application;

7 is another schematic structural view of a third embodiment of the fingerprint sensing device of the present patent application;

8 is a schematic structural view of a fourth embodiment of a fingerprint sensing device of the present patent application;

9 is a schematic structural diagram of a fingerprint identification chip in the prior art;

10 is a schematic structural diagram of a fingerprint identification chip in a fifth embodiment of the fingerprint sensing device of the present patent application;

11 is another schematic structural diagram of a fingerprint identification chip in a fifth embodiment of the fingerprint sensing device of the present patent application;

The implementation, functional features, and advantages of the present invention will be further described with reference to the accompanying drawings.

detailed description

It is understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to be limiting.

As shown in FIG. 1, a conventional fingerprint sensing device includes a fingerprint recognition chip 1, a printed circuit board (PCB) 2, and a metal bezel 3. The fingerprint recognition chip 1 includes a sensor area a and a peripheral area b. When the fingerprint sensing device operates as the touch button mode, the finger is placed in the sensing area a, and the fingerprint sensing function of the fingerprint recognition chip 1 can be used to detect the finger touch and respond to the touch operation. However, the peripheral area b, the metal outer ring 3, and the entire printed circuit board 2 are generally difficult to respond to the touch operation of the finger.

Embodiment 1

Referring to FIG. 2, it is a schematic structural diagram of a first embodiment of a fingerprint sensing device provided by the present patent application. The fingerprint sensing device includes a fingerprint identification chip 10, a printed circuit board 20 and a metal outer ring 30. The fingerprint identification chip 10 is located at a central portion of the fingerprint sensing device, and the metal outer ring 30 is located at the periphery of the fingerprint sensing device. Partially and surround the fingerprint sensor chip 10. The printed circuit board 20 is located between the fingerprint identification chip 10 and the metal outer ring 30. The printed circuit board 20 has a pad region C, which is usually copper. Pad area. The printed circuit board 20 can be, for example, a flexible printed circuit board (FPCB).

The fingerprint recognition chip 10 includes a sensing area A and a peripheral area B. Generally, only the sensing area A of the fingerprint sensing device can respond to the touch operation, and the peripheral area B, the metal outer ring 30, and the entire printed circuit board 20 cannot respond to the touch operation. In order to expand the touch operation response area of the fingerprint sensing device, a fingerprint button channel pin 11 is added to the fingerprint recognition chip 10 of the embodiment, and a pad area C on the printed circuit board 20 is electrically connected to the capacitor button channel pin 11 Therefore, the pad region C also has a touch operation responsiveness. When the fingerprint sensing device operates as the touch button mode, the finger is placed in the sensing area A, and the fingerprint sensing function of the fingerprint recognition chip 10 can be used to detect the finger touch, in response to the touch operation; when the finger is located on the printed circuit board 20 In the pad area C, the touch detection operation can be responded to by the capacitance detecting capability of the pad area C.

Therefore, the touch response area of the fingerprint sensing device is enlarged from the previous sensing area A to the sensing area A and the pad area C of the printed circuit board 20, since these two areas occupy most of the area of the fingerprint sensing device, Equivalent to the entire fingerprint sensing device can respond to touch operations. At this time, the sensing area A of the fingerprint recognition chip 10 and the pad area C of the printed circuit board 10 can be used as independent touch buttons, respectively, and various functions can be realized by the two independent touch buttons and a combination of the two.

Embodiment 2

Referring to FIG. 3 to FIG. 5, the difference between this embodiment and the first embodiment is that there are at least two capacitive button channel pins 11 of the fingerprint identification chip 10, and the pad area C of the printed circuit board 20 and each of the capacitive button channels. Pin 11 is electrically connected, and the pad of printed circuit board 20 is The area C is electrically connected to the plurality of capacitive button channel pins 11 to enhance signal response capability, and the plurality of capacitive button channel pins 11 are evenly distributed on the fingerprint recognition chip 10, for example.

As shown in FIG. 3, there are two capacitor button channel pins 11 respectively located on opposite sides of the fingerprint identification chip 10, and electrically connected to the pad region C of the brush circuit board 20, respectively. Both the sensing area A of the fingerprint identification chip 10 and the pad area C of the printed circuit board 20 can respond to the touch operation and can be used as touch buttons, respectively.

As shown in FIG. 4, there are three capacitor button channel pins 11 respectively located on three sides of the fingerprint identification chip 10, and electrically connected to the pad regions C of the brush circuit board 20, respectively. Both the sensing area A of the fingerprint identification chip 10 and the pad area C of the printed circuit board 20 can respond to the touch operation and can be used as touch buttons, respectively.

As shown in FIG. 5, there are four capacitor button channel pins 11 respectively located on the four sides of the fingerprint identification chip 10, and electrically connected to the pad regions C of the brush circuit board 20, respectively. Both the sensing area A of the fingerprint identification chip 10 and the pad area C of the printed circuit board 20 can respond to the touch operation and can be used as touch buttons, respectively.

Embodiment 3

Referring to FIG. 6 and FIG. 7, the difference between the first embodiment and the second embodiment is that the metal outer ring 30 is also electrically connected to the pad region C of the printed circuit board 20. Specifically, the metal outer ring 30 can be The lower portion is bonded to the exposed copper region of the pad region C of the printed circuit board 20 to effect connection. Therefore, the metal outer ring 30 also has the ability to respond to the touch operation, and the user can touch the metal outer ring 30 to perform the touch operation, thereby further expanding the touch area of the fingerprint sensing device. At this time, the sensing area A of the fingerprint identification chip 10 and the pad area C and the metal outer ring 30 of the printed circuit board 20 can be used as independent touch buttons, respectively. Various functions can be realized by these two independent touch buttons and a combination of the two.

As shown in FIG. 6, the pad region C of the printed circuit board 20 is electrically connected to a capacitive button channel pin 11 of the fingerprint recognition chip 10, while the upper and lower sides 31 of the metal outer ring 30 and the pad region C of the printed circuit board 20 are electrically connected. connection. The sensing area A of the fingerprint identification chip 10, the pad area C of the printed circuit board 20, and the metal outer ring 30 can all be used as touch buttons in response to a touch operation.

As shown in FIG. 7, the pad region C of the printed circuit board 20 is electrically connected to the two capacitive button channel pins 11 of the fingerprint identification chip 10, respectively, while the upper and lower sides 31 of the metal outer ring 30 and the pad region of the printed circuit board 20 are formed. C is electrically connected. The sensing area A of the fingerprint identification chip 10, the pad area C of the printed circuit board 20, and the metal outer ring 30 can all be used as touch buttons in response to a touch operation.

Embodiment 4

Referring to FIG. 8, the difference between the present embodiment and the second embodiment is that the capacitive button channel pin 11 of the fingerprint identification chip 10 and the pad region C on the printed circuit board 20 are at least two, and each pad region C is mutually Independently, each pad area C is electrically connected to a capacitor button channel pin 11, so that each pad area C has a touch operation response capability and can be used as an independent touch button.

As shown in FIG. 8, two pad regions C on the printed circuit board 20 are respectively located on both sides of the fingerprint identification chip 10, and the two pad regions C can independently respond to respective touch button events. Two pad regions C can be used to independently respond to different functions or actions, such as touching the pad region C on the right side to realize the "return" function, and touching the pad region C on the left side to realize the "menu". Function, both left and right The touch pad area C responds to the "desktop" function and the like. In addition, it is also possible to directly respond to a corresponding application, such as touching the pad area C on the left side or the pad area C on the right side or a combination of the two to directly activate the camera, WeChat, speed dial a number, and the like. In addition, the above functions and other combined functions can also be implemented in cooperation with the sensing area A of the fingerprint recognition chip 10.

In some embodiments, the metal outer ring 30 can be electrically connected to any pad region C of the printed circuit board 20 as in the third embodiment, so that the metal outer ring 30 also has the ability to respond to touch operations. The metal outer ring 30 can be touched to perform a touch operation to further expand the touch area of the fingerprint sensing device.

Embodiment 5

The foregoing first to fourth embodiments implement the expansion of the touch response area on the printed circuit board 20 of the fingerprint sensing device. In this embodiment, the touch response area is extended on the fingerprint recognition chip 10, and the fingerprint recognition is performed. The packaging phase of the chip 10 is implemented. That is, the present embodiment improves the touch response area of the fingerprint sensing device by improving the fingerprint identification chip 10. This embodiment is particularly suitable for the case where the fingerprint recognition chip 10 occupies a large area in the entire fingerprint sensing device.

As shown in FIG. 9, the conventional fingerprint identification chip is formed by molding a package substrate and a chip core, and includes a central portion 101 and a peripheral portion 102 (ie, a peripheral portion B). The core portion 101 has a sensing area A. The sensing area A can respond to the touch operation of the finger.

As shown in FIG. 10 and FIG. 11 , in the embodiment, a capacitive button channel pin 11 is added to the core portion 101 of the fingerprint identification chip 10 , and the capacitor button channel pin 11 can be Externally extending, the peripheral portion 102 has a pad region D, and the pad region D is electrically connected to the capacitive button channel pin 11 to extend the touch response region to the peripheral portion 102 such that the pad region D of the peripheral portion 102 also has Touch operation response capability. There may be only one pad area D of the peripheral portion 102. At this time, the capacitor button channel pin 11 of the core portion 101 may have one or more, and each of the capacitor button channel pins 11 is electrically connected to the pad region D. There may be a plurality of pad regions D of the peripheral portion 102, and each pad region D is independent of each other. There are also a plurality of capacitive button channel pins 11 of the corresponding core portion 101, and each pad region D is electrically connected to a capacitive button channel. The pin 11, each pad area D can be used as a separate button in response to a finger touch operation.

As shown in FIG. 10, the peripheral portion 102 of the fingerprint identification chip 10 has two pad regions D, which are respectively located at two sides of the core portion 101, and a capacitor button channel pin 11 is respectively disposed on both sides of the core portion 101, and each soldering is performed. The pad area D is electrically connected to a capacitor button channel pin 11, so that the left and right pad areas D have a touch operation response capability, and can serve as two independent buttons in response to the user's touch operation.

The user can cut the fingerprint recognition chip 10 into an arbitrary shape as needed, and as shown in FIG. 11, the both ends of the fingerprint recognition chip 10 are cut into an arc shape.

In some embodiments, the capacitive button channel pin 11 of the core portion 101 of the fingerprint recognition chip 10 can be extended to the outside of the fingerprint identification chip 10, and this embodiment and any of the foregoing first to fourth embodiments are used. Together, a new embodiment is formed. Thereby, the touch response area of the fingerprint sensing device is extended from the sensing area A of the core portion 101 of the fingerprint recognition chip 10 to the peripheral portion 102 of the fingerprint recognition chip 10, the printed circuit board 20, and even the metal outer ring 30.

The fingerprint sensing device of the present patent application adds a capacitor button channel 11 to the fingerprint recognition chip 10 and a pad region (C, for the printed circuit board 20 or/and the peripheral portion 102 of the fingerprint recognition chip 10; D), electrically connecting the pad area (C, D) and the capacitor button channel pin 11, so that the pad area (C, D) also has the touch operation response capability, and realizes the touch of the fingerprint sensing device. The control response area extends from the sensing area A of the core portion 101 of the fingerprint recognition chip 10 to the printed circuit board 20 or/and the peripheral portion 102 of the fingerprint recognition chip 10, and even extends to the metal outer ring 30 of the fingerprint sensing device, greatly expanding the fingerprint The touch response area of the device is recognized, thereby further expanding the shortcut key operation function and improving the user experience.

Some embodiments of the present patent application provide a terminal device, which may be a mobile terminal such as a mobile phone or a tablet computer, or may be another non-mobile terminal device. The terminal device includes a fingerprint sensing device, the fingerprint sensing device includes a fingerprint identification chip, a printed circuit board and a metal outer ring, the fingerprint identification chip has a capacitive button channel pin, and the printed circuit board has a solder a pad area, the pad area electrically connecting the capacitive button channel pins. The fingerprint sensing device described in this embodiment is a fingerprint sensing device according to the above embodiment of the present application, and details are not described herein again.

The fingerprint sensing device of the embodiment adds a capacitor button channel pin to the fingerprint identification chip of the fingerprint sensing device, and adds a pad region to the peripheral portion of the printed circuit board of the fingerprint sensing device or/and the fingerprint identification chip. The pad area is electrically connected to the capacitor button channel pin, so that the pad area also has a touch operation response capability, and the touch response area of the fingerprint sensing device is expanded from the sensing area of the core portion of the fingerprint identification chip. To the periphery of the printed circuit board or / and fingerprint identification chip, even to fingerprint sensing The metal outer ring of the device greatly expands the touch response area of the fingerprint recognition device, thereby expanding more shortcut key operation functions and improving the user experience.

It should be understood that the above is only a part of the embodiments of the present patent application, and the scope of the patent application is not limited thereby, and the equivalent structure or equivalent process transformation using the content of the patent application and the drawings is directly or Indirect use in other related technical fields is equally included in the scope of patent protection of this patent application.

Claims

A fingerprint sensing device, comprising: a fingerprint identification chip, a printed circuit board and a metal outer ring, the fingerprint identification chip having a capacitive button channel pin, the printed circuit board having a pad area, the pad area Electrically connecting the capacitive button channel pins.
The fingerprint sensing device of claim 1 wherein said fingerprint identification chip has a capacitive button channel pin and said printed circuit board has a pad region.
The fingerprint sensing device of claim 1 wherein: said fingerprint identification chip has at least two capacitive button channel pins, said printed circuit board having a pad region, said pad regions electrically connecting each Capacitor button channel pin.
The fingerprint sensing device of claim 3 wherein said at least two capacitive button channel pins are evenly distributed.
The fingerprint sensing device of claim 3 wherein: said pad region is distributed around said periphery of said fingerprint identification chip.
The fingerprint sensing device according to claim 1, wherein: said fingerprint identification chip has at least two capacitive button channel pins, said printed circuit board having at least two pad regions, each pad region being electrically connected A capacitor button channel pin.
The fingerprint sensing device according to any one of claims 1 to 6, wherein the fingerprint recognition chip comprises a core portion and a peripheral portion, and the capacitive button channel pin extends from the core portion, the periphery The portion has a pad area electrically connected to the capacitor button channel pin.
The fingerprint sensing device according to claim 7, wherein when the capacitive button channel pin and the peripheral portion have at least two pad regions, each pad portion of the peripheral portion is electrically connected to a capacitor Button channel pin.
The fingerprint sensing device according to any one of claims 1 to 6, wherein the metal outer ring is electrically connected to the pad region.
A terminal device, comprising: the fingerprint sensing device according to any one of claims 1-9.