WO2020073281A1

WO2020073281A1 - Fingerprint module, touch wake-up module and door lock

Info

Publication number: WO2020073281A1
Application number: PCT/CN2018/109861
Authority: WO
Inventors: 梁晓明; 李健
Original assignee: 深圳市汇顶科技股份有限公司
Priority date: 2018-10-11
Filing date: 2018-10-11
Publication date: 2020-04-16
Also published as: CN109416742A; CN109416742B

Abstract

A fingerprint module (302), a touch wake-up module (312) and a door lock. The fingerprint module (302) comprises: a cover plate, the touch wake-up module (312) and a fingerprint chip (322). The touch wake-up module (312) comprises: a touch detection unit (3121) and a wake-up capacitor (3122), which is composed of a first electrode (3122A) and a second electrode (3122B), wherein the first electrode (3122A) or the second electrode (3122B) serves as a touch detection electrode, and the touch detection electrode is hidden in the fingerprint module (302). The touch detection unit (3121) is used for detecting the amount of a capacitance change of the wake-up capacitor (3122) before and after being touched by a finger; and the fingerprint chip (322) is used for being powered on and started when the amount of a capacitance change of the wake-up capacitor (3122) matches a set wake-up condition, so as to perform fingerprint recognition on the finger. The fingerprint module (302) prevents the short circuiting with a lock body in the prior art caused by exposing a metal key to wake up the fingerprint chip (322).

Description

Fingerprint module, touch wake module, door lock

Technical field

The embodiments of the present application relate to the technical field of security, and in particular to a fingerprint module, a touch-wake module, and a door lock.

Background technique

The uneven lines on the finger skin are referred to as fingerprints. These lines are different in patterns, breakpoints, and intersections. These characteristics are different for each finger, and these characteristics are unique and permanent, so Correspondence between users and their fingerprints can be established. By comparing the user's fingerprint characteristics with pre-stored fingerprint characteristics, the legitimacy of the user's identity can be verified. Therefore, the above-mentioned characteristics of fingerprints ensure that it is widely used in identity recognition scenarios. For example, the above-mentioned characteristics of fingerprints are applied to access control to open / close the door.

In specific applications, a fingerprint module is generally installed on the door panel or handle to control the opening / closing of the door through fingerprint recognition. In actual application scenarios, the switching frequency of the door is not very high, that is, the fingerprint module is more in a non-use state. Therefore, in order to save power, the fingerprint module needs to be powered off to enter the power-down state when it is not in use. In order to achieve the purpose of power saving, when the identity recognition control is to be turned on / off, it needs to be powered on to wake up from the power-off state for fingerprint recognition.

In the prior art, in order to wake up the fingerprint module from a power-off state, an exposed metal key is used. After the assembly, the exposed metal key must be partially exposed to facilitate user's finger contact, which in turn triggers the fingerprint module to power off Was awakened in the state for fingerprint recognition.

However, the above solution in the prior art has the following problem: when the above fingerprint module is assembled on the door, the exposed metal button usually directly contacts the metal of the lock body, which may cause the short circuit of the exposed metal button and the lock body Achieve the above wake-up.

Summary of the invention

In view of this, one of the technical problems solved by the embodiments of the present application is to provide a fingerprint module, a touch wake-up module, and a door lock to overcome the above-mentioned defects in the prior art.

An embodiment of the present application provides a fingerprint module, which includes a cover plate, a touch wake-up module, and a fingerprint chip. The touch wake-up module includes: a touch detection unit and a wake-up capacitor composed of a first electrode and a second electrode. The first electrode or the second electrode is used as a touch detection electrode, the touch detection electrode is hidden in the fingerprint module; the touch detection unit is used to detect the amount of capacitance change of the wake-up capacitor before and after a finger touch; The fingerprint chip is used to power on and start fingerprint recognition for the finger when the capacitance change amount of the wake-up capacitor matches the set wake-up condition.

Optionally, in an embodiment of the present application, the touch detection electrode is a conductive pad or a conductive ink layer.

Optionally, in an embodiment of the present application, the second electrode and the first electrode form a self-capacitance, and the self-capacitance serves as the wake-up capacitance.

Optionally, in an embodiment of the present application, the second electrode is systematically, correspondingly, the first electrode serves as the touch detection electrode and is provided on the fingerprint chip together with the fingerprint chip On the substrate; or, the first electrode is provided on the lower surface of the cover plate, and the fingerprint chip is provided on the substrate of the fingerprint chip.

Optionally, in an embodiment of the present application, the first electrode is systematically, correspondingly, the second electrode serves as the touch detection electrode and is provided on the fingerprint chip together with the fingerprint chip On the substrate; or, the second electrode serves as the touch detection electrode and is provided on the lower surface of the cover plate, and the fingerprint chip is provided on the substrate of the fingerprint chip.

Optionally, in an embodiment of the present application, the first electrode is a ring electrode.

Optionally, in an embodiment of the present application, the second electrode and the first electrode form a mutual capacitance, and the mutual capacitance serves as the wake-up capacitance.

Optionally, in an embodiment of the present application, the second electrode is provided on the upper surface of the cover plate, and correspondingly, the first electrode serves as the touch detection electrode and is combined with the fingerprint chip It is provided on the substrate of the fingerprint chip; or, the first electrode is provided on the lower surface of the cover plate, and the fingerprint chip is provided on the substrate of the fingerprint chip.

Optionally, in an embodiment of the present application, the first electrode is provided on the upper surface of the cover plate, and correspondingly, the second electrode serves as the touch detection electrode and is the same as the fingerprint chip And is provided on the substrate of the fingerprint chip; or, the second electrode is provided on the lower surface of the cover plate, and the fingerprint chip is provided on the substrate of the fingerprint chip.

Optionally, in an embodiment of the present application, the second electrode is a ring electrode.

Optionally, in an embodiment of the present application, the fingerprint chip is further used to be in a power-down state when the capacitance change amount of the wake-up capacitor does not match the set wake-up condition.

An embodiment of the present application further provides a touch wake-up module, which includes a touch detection unit and a wake-up capacitor composed of a first electrode and a second electrode. The first electrode or the second electrode serves as a touch detection electrode. The touch detection electrode is hidden in the fingerprint module; the touch detection unit is used to detect the capacitance change amount of the wake-up capacitor before and after a finger touch, so that when the capacitance change amount of the wake-up capacitor matches the set wake-up condition After power-on, the fingerprint chip is activated to perform fingerprint identification on the finger.

An embodiment of the present application also provides a door lock, which includes a microprocessor and the fingerprint module described in any embodiment of the present application, the touch detection electrode faces the direction of being touched by a finger, and the capacitance of the wake-up capacitor When the change amount matches the set wake-up condition, the microprocessor is used to activate the fingerprint chip to perform fingerprint identification on the finger and perform an unlocking action after the fingerprint identification is successful.

Optionally, in an embodiment of the present application, when the amount of change in the capacitance of the wake-up capacitor matches the set wake-up condition, the touch detection unit generates an interrupt signal and transmits it through the touch detection electrode to cause all The microprocessor activates the fingerprint chip.

In the embodiment of the present application, since the fingerprint module includes: a cover plate, a touch wake-up module, and a fingerprint chip, the touch wake-up module includes: a touch detection unit and a wake-up capacitor composed of a first electrode and a second electrode, the first The electrode or the second electrode is used as a touch detection electrode, and the touch detection electrode is hidden in the fingerprint module; the touch detection unit is used to detect the capacitance change amount of the wake-up capacitor before and after a finger touch; the fingerprint chip It is used to start the power on when the capacitance change amount of the wake-up capacitor matches the set wake-up condition to perform fingerprint recognition on the finger, thereby avoiding the wake-up of the fingerprint chip caused by the exposed metal buttons in the prior art The exposed metal key is short-circuited with the lock body.

BRIEF DESCRIPTION

Hereinafter, some specific embodiments of the embodiments of the present application will be described in detail in an exemplary but non-limiting manner with reference to the drawings. The same reference numerals in the drawings indicate the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

1 is a schematic diagram of the assembly position of the fingerprint module on the door lock in Embodiment 1 of the present application;

2 is a schematic diagram of the assembly position of the fingerprint module on the door lock in the second embodiment of the present application;

3 is a schematic diagram of a control principle of using a fingerprint module to implement a door lock in Embodiment 3 of the present application;

4 is a schematic diagram of a control principle of using a fingerprint module to implement a door lock in Embodiment 4 of the present application;

5 is a schematic structural diagram of a fingerprint module in Embodiment 5 of the present application;

6 is a schematic structural diagram of a fingerprint module in Embodiment 6 of the present application;

7 is a schematic structural diagram of a fingerprint module in Embodiment 7 of the present application;

8 is a schematic structural diagram of a fingerprint module in Embodiment 8 of the present application;

9 is a schematic structural diagram of a fingerprint module in Embodiment 9 of the present application;

10 is a schematic structural diagram of a fingerprint module according to Example 10 of the present application;

11 is a schematic diagram of the external form of the fingerprint module in the eleventh embodiment of the present application;

12 is a schematic diagram of the external form of the fingerprint module in the prior art;

FIG. 13 is a schematic diagram of a touch detection electrode on a lower surface of a cover plate in a fingerprint module according to Embodiment 12 of the present application.

detailed description

It is not necessary for all technical solutions of the embodiments of the present application to achieve all the above advantages at the same time.

In the embodiment of the present application, since the fingerprint module includes: a cover plate, a touch wake-up module, and a fingerprint chip, the touch wake-up module includes: a touch detection unit and a wake-up capacitor composed of a first electrode and a second electrode, the first The electrode or the second electrode is used as a touch detection electrode, and the touch detection electrode is hidden in the fingerprint module; the touch detection unit is used to detect the capacitance change amount of the wake-up capacitor before and after a finger touch; the fingerprint chip It is used to start the power on when the capacitance change amount of the wake-up capacitor matches the set wake-up condition to perform fingerprint recognition on the finger, thereby avoiding the wake-up of the fingerprint chip caused by the exposed metal buttons in the prior art The short circuit of the exposed metal button and the lock body makes it impossible to wake up.

FIG. 1 is a schematic diagram of the assembly position of the fingerprint module on the door lock in Embodiment 1 of the present application; as shown in FIG. 1, the fingerprint module 101 is specifically assembled on the door panel 102.

2 is a schematic diagram of the assembly position of the fingerprint module on the door lock in the second embodiment of the present application; as shown in FIG. 2A, the fingerprint module 101 is specifically assembled to the handle 103, compared with FIG. 1, compared with FIG. 1 described above Due to the small size of the handle, when the fingerprint module is assembled to the handle, the fingerprint module is required to have a more compact structure.

Specifically, in the embodiment of FIG. 1 or FIG. 2 described above, a mounting hole may be opened in the handle or door panel, and the fingerprint module is installed in the mounting hole. At the same time, when the fingerprint module is assembled to After the installation hole, the touch detection electrode is insulated from the lock body.

Of course, for those of ordinary skill in the art, the fingerprint module that satisfies the assembly position of FIG. 2 can also be applied to satisfy the assembly position of FIG. 1, and the fingerprint module that satisfies the assembly position of FIG. 1 can also be applied to satisfy the assembly position of FIG. 2. Assembly position.

FIG. 3 is a schematic diagram of a control principle for implementing a door lock using a fingerprint module in Embodiment 3 of the present application; as shown in FIG. 3, the fingerprint door lock includes: a microprocessor 301 (or door lock MCU) and a fingerprint module 302, The fingerprint module 302 includes a touch wake module 312 and a fingerprint chip 322. The touch wake module 312 includes a touch detection unit 3121 and a wake capacitor 3122; the touch detection unit 3121 is used to detect the wake capacitor before and after a finger touch The capacitance change amount of 3122; the fingerprint chip 322 is used to start the power on when the capacitance change amount of the wake-up capacitor 3122 matches a set wake-up condition (such as the capacitance change amount exceeds a set threshold) Perform fingerprint recognition; when the capacitance change amount of the wake-up capacitor 3122 matches the set wake-up condition, the microprocessor 301 is used to activate the fingerprint chip 322 to perform fingerprint recognition on the finger and the fingerprint recognition succeeds Afterwards, an unlocking action is performed, such as controlling the motor drive to start the motor to drive the lock body away from the lock hole. When the amount of capacitance change of the wake-up capacitor 3122 does not match the set wake-up condition, the fingerprint chip 322 is in a power-down state, so that the fingerprint module is in a power-saving mode.

Further, the wake-up capacitor 3122 includes a first electrode (not shown in FIG. 3) and a second electrode (not shown in FIG. 3). The first electrode or the second electrode serves as a touch detection electrode, along the The touch detection electrode is provided on the substrate of the fingerprint chip 322 or the horizontal direction of the cover plate to hide the touch detection electrode in the fingerprint module 302, thereby avoiding the exposure of metal keys in the prior art to realize the fingerprint chip The wake-up of 322 caused a short circuit with the lock body.

It should be noted that when the amount of change in the capacitance of the wake-up capacitor 3122 does not match the set wake-up condition, the fingerprint chip 322 in the power-down state may include two situations:

(1) The fingerprint chip 322 is currently in a power-off or power-off state. At this time, a finger touches the fingerprint module 302, resulting in a capacitance change amount before and after the wake-up capacitor 3122. However, the capacitance change amount and the set wake-up condition Mismatch, therefore, the fingerprint chip 322 keeps the power-off state unchanged.

(2) The fingerprint chip 322 is currently in the power-on state and the unlock control of the door lock is completed. At this time, the finger is separated from the fingerprint module 302, resulting in a capacitance change amount before and after the wake-up capacitor 3122 is touched. The set wake-up conditions do not match, therefore, the fingerprint chip 322 enters the power-down state from the power-on startup state.

FIG. 4 is a schematic diagram of a control principle for implementing a door lock by using a fingerprint module in Embodiment 4 of the present application; as shown in FIG. 4, in addition to the above-mentioned microprocessor 301 (or door lock MCU) and fingerprint module in FIG. 3 In addition to the group 302, it also includes: a battery 303, a power management unit 304, and a low dropout regulator 305 (low dropout regulator, LDO for short).

The battery 303 is electrically connected to the power management unit 304, and the power management unit 304 is used to control the input voltage provided by the battery 303 to the low-dropout voltage regulator 305 for processing to generate a fingerprint module The working voltage of 302 (such as 3.3V) is sent to the fingerprint chip 322 in the fingerprint module 302 when fingerprint identification is required, so that the fingerprint chip 322 enters the power-on state.

In addition, the low-dropout voltage regulator 305 is also used to control the supply of the operating voltage (such as 5V) to the microprocessor 301.

Specifically, in this embodiment, a first switch S1 is provided between the low-dropout voltage regulator 305 and the fingerprint module 302. When the capacitance change amount of the wake-up capacitor 3122 matches the set wake-up condition and needs During fingerprint identification, the first switch S1 is closed to transmit the operating voltage of the fingerprint module 302 to the fingerprint chip 322 in the fingerprint module 302, so that the fingerprint chip 322 enters the power-on state. Specifically, the microprocessor 301 controls the first switch S1 to close through the first control signal VDD_EN. Further, when the amount of capacitance change of the wake-up capacitor 3122 matches the set wake-up condition, the touch detection unit 3121 generates an interrupt signal KEY_OUR_INT and transmits it to the microprocessor 301 through the touch detection electrode, the The microprocessor 301 receives the interrupt signal KEY_OUR_INT and then generates the first control signal VDD_EN, thereby starting the fingerprint chip 322.

Specifically, in this embodiment, the fingerprint chip 322 includes a fingerprint collection module 3221 and a fingerprint recognition module 3222, the fingerprint collection module 3221 is used to collect fingerprints touched on the fingerprint module 302, and the fingerprint recognition module 3222 is used to start The fingerprint collection module 3221 performs fingerprint collection and recognizes the collected fingerprints.

In this embodiment, a second switch S2 is also provided between the first switch S1 and the fingerprint collection module 3221. When the first switch S1 is closed, the fingerprint identification module 3222 receives the working voltage of the fingerprint module 302 and passes the Two control signals VDD_FP_EN control the second switch S2 to close, so that the fingerprint collection module 3221 receives the working voltage of the fingerprint module 302 to start the fingerprint collection module 3221 to perform fingerprint collection. After the fingerprint collection module 3221 completes fingerprint collection, the second switch S2 is turned off, so that the fingerprint collection module 3221 is in a power-off state, thereby further achieving the purpose of power saving.

In this embodiment, a third switch S3 is further provided between the touch detection unit 3121 and the microprocessor 301. Before the fingerprint module 302 is in the power-on state, the fingerprint identification module 3222 controls the third by a third control signal VDD_Touch_EN The switch S3 is closed, so that the power supply to the touch detection unit 3121 is controlled by the microprocessor for touch detection, and when the fingerprint recognition module completes recognition and unlocks the door lock, the third switch is controlled by a third control signal VDD_Touch_EN S3 is turned off, so that the capacitance of the wake-up capacitor is reset, that is, the wake-up capacitance is restored to the reference capacitance.

Further, in this embodiment, the microprocessor 301 communicates with the fingerprint identification module 3222 through a UART interface, and the fingerprint identification module 3222 sends the fingerprint identification result to the microprocessor 301 through the UART interface; if the fingerprint identification result indicates If the fingerprint is legal, the legal identification result of the fingerprint is sent to the microprocessor 301. The microprocessor 301 controls the motor drive 306 to start the motor and then drives the lock tongue out of the lock hole to complete the unlocking. The identification result is sent to the microprocessor 301, and the microprocessor 301 controls the motor drive 306 not to start the motor so that the lock tongue does not leave the lock hole to maintain the locked state.

FIG. 5 is a schematic structural diagram of a fingerprint module in Embodiment 5 of the present application; as shown in FIG. 5, in order to realize hidden touch detection electrodes from the layer structure, in this embodiment, only the substrate 501 is shown from a longitudinal cross-sectional view angle , A cover plate 502, and the first electrode 3122A as the touch detection electrode. In this embodiment, the substrate 501 is a flexible substrate (also called FPC), the cover plate 502 is a glass cover plate, and the touch detection electrode is a ring electrode formed by a ring-shaped conductive pad.

As described above, in this embodiment, the fingerprint chip is awakened based on the self-capacitance, that is, the second electrode and the first electrode 3122A form a self-capacitance, the self-capacitance is used as the wake-up capacitance, and the second electrode is specifically Systemically (not shown in the figure).

Further, in this embodiment, the first electrode 3122A as the touch detection electrode is provided on the substrate 501 of the fingerprint chip together with the fingerprint chip, so as to be hidden in the fingerprint module. Specifically, the touch detection electrode is pasted on the substrate 501 of the fingerprint chip through the glue 600 along the peripheral direction of the substrate 501 of the fingerprint chip, and the fingerprint chip is provided with an internal area A of the touch detection electrode. Further, an associated cover plate 502 is provided above the touch detection electrode.

6 is a schematic structural diagram of a fingerprint module in Embodiment 6 of the present application; as shown in FIG. 6, different from the embodiment of FIG. 5 described above, in this embodiment, the first electrode 3122A as the touch detection electrode is provided at The lower surface of the cover plate 502, and the fingerprint chip is disposed on the substrate 501 of the fingerprint chip, so as to be hidden in the fingerprint module. Specifically, the touch detection electrode is pasted on the cover plate 502 through the glue 600 along the peripheral direction of the lower surface of the cover plate 502, and the fingerprint chip is provided in the area B of the substrate 501 of the fingerprint chip.

Compared with the fingerprint module shown in FIG. 5 and FIG. 6, in FIG. 5, the first electrode 3122A is directly disposed on the substrate 501 of the fingerprint chip. Therefore, in the formation process of the substrate 501, the substrate 501 Add a circle of conductive pads (such as copper skin) on the periphery of the device, and then connect it to the touch detection unit through the trace, so that the touch detection electrode is hidden from the fingerprint under the premise of low process difficulty and low cost In the module.

In FIG. 6, since the touch detection electrodes are provided on the lower surface of the cover plate 502, in the process, the touch detection electrodes need to be additionally attached to the lower surface of the cover plate 502, which is difficult and costly to implement.

Referring to FIG. 5 or FIG. 6 above, in another embodiment, the first electrode and the second electrode are exchanged, that is, the first electrode 3122A is systematically, correspondingly, the second electrode 3122B serves as the touch detection electrode and It is provided on the substrate 501 of the fingerprint chip together with the fingerprint chip; or, the second electrode 3122B serves as the touch detection electrode and is provided on the lower surface of the cover plate 502, and the fingerprint chip is provided On the substrate 501 of the fingerprint chip.

Different from the principle of realizing wake-up based on self-capacitance in FIGS. 5 and 6 above, in the embodiments of FIGS. 7-10 of the present application described below, wake-up is realized based on mutual capacitance, that is, the second electrode 3122B and the first electrode 3122A are composed Mutual capacitance, the mutual capacitance serves as the wake-up capacitance.

7 is a schematic structural diagram of a fingerprint module in Embodiment 7 of the present application; as shown in FIG. 7, in order to realize the hidden touch detection electrode from the layer structure, in this embodiment, only the substrate 501 is shown from the perspective of the longitudinal sectional view , A cover plate 502 and a touch detection electrode as the first electrode 3122A. In this embodiment, the substrate 501 is a flexible substrate 501, the cover plate 502 is a glass cover plate, and the touch detection electrode is a ring electrode formed by a ring-shaped conductive pad.

In this embodiment, the second electrode 3122B is disposed on the lower surface of the cover plate 502, and correspondingly, the first electrode 3122A serves as the touch detection electrode and is disposed on the fingerprint together with the fingerprint chip On the substrate 501 of the chip.

In this embodiment, the first electrode 3122A is similar to FIG. 5 described above, and is directly disposed on the substrate 501 of the fingerprint chip. Therefore, similar to the above embodiment, in the formation process of the substrate 501, the periphery of the substrate 501 Add a circle of conductive pads (such as copper skin), and then connect it to the touch detection unit through wiring, so that the touch detection electrode is hidden in the fingerprint module under the premise of low process difficulty and low cost in.

In this embodiment, the second electrode 3122B is specifically a conductive ink layer, and the conductive ink layer is directly formed on the lower surface of the cover plate 502 by, for example, a silk screen process. The conductive ink layer is also annular, for example, that is, a layer of conductive ink is laid on the peripheral area of the cover plate 502.

FIG. 8 is a schematic structural diagram of a fingerprint module in Embodiment 8 of the present application; as shown in FIG. 8, similar to the embodiment of FIG. 7 described above, in order to hide the touch detection electrode from the layer structure, in this embodiment, a longitudinal cross-sectional view From the angle, only the substrate 501, the cover plate 502, and the touch detection electrode as the first electrode 3122A are shown. In this embodiment, the substrate 501 is also a flexible substrate 501, and the cover plate 502 is also a glass substrate 501. In order not to occupy space of other structures of the fingerprint chip, the touch detection electrode is specifically a ring electrode formed by a ring-shaped conductive pad .

In this embodiment, the second electrode 3122B is disposed on the lower surface of the cover plate 502, and the second electrode 3122B is specifically a conductive ink layer, and the conductive ink layer is directly formed on the cover plate by a silk screen process, for example The bottom surface of 502. The conductive ink layer covers the entire lower surface of the substrate. Different from the above embodiment, the first electrode 3122A as the touch detection electrode is disposed under the second electrode 3122B through the glue 600, and the fingerprint chip is disposed on the substrate 501 of the fingerprint chip, Therefore, the touch detection electrode is hidden in the fingerprint module.

9 is a schematic structural diagram of a fingerprint module in Embodiment 9 of the present application; as shown in FIG. 9, the same as the above embodiment of FIG. 7 is, in order to realize hidden touch detection electrodes from the layer structure, in this embodiment, from A longitudinal sectional view angle shows only the substrate 501 and the cover plate 502, but the touch detection electrode is the second electrode 3122B. The cover plate 502 is, for example, a glass cover plate, and the touch detection electrode is a ring electrode formed by a ring-shaped conductive pad .

In this embodiment, the first electrode 3122A is provided on the lower surface of the cover plate 502, and correspondingly, the second electrode 3122B serves as the touch detection electrode and is provided on the fingerprint together with the fingerprint chip On the substrate 501 of the chip.

In this embodiment, the second electrode 3122B is directly disposed on the substrate 501 of the fingerprint chip. Therefore, in the formation process of the substrate 501, a circle of conductive pads (such as copper skin) is added to the periphery of the substrate 501. However, it can be connected to the touch detection unit through wiring later, so that the touch detection electrode is hidden in the fingerprint module under the premise of low process difficulty and low cost.

In this embodiment, the first electrode 3122A is specifically a conductive ink layer, and the conductive ink layer is directly formed on the lower surface of the cover plate 502 through, for example, a screen printing process. For example, the conductive ink layer is also ring-shaped, that is, a layer of conductive ink is laid on the peripheral area of the lower surface of the cover plate 502.

10 is a schematic structural diagram of a fingerprint module in Embodiment 10 of the present application; as shown in FIG. 10, the same as FIG. 7 above, in order to realize how to hide the touch detection electrode from the layer structure, in this embodiment, from the perspective of a longitudinal sectional view, Only the substrate 501 and the cover plate 502 are shown, but the touch detection electrode is the second electrode 3122B. The cover plate 502 is, for example, a glass cover plate, which is also a ring electrode formed by a ring-shaped conductive pad.

In this embodiment, the first electrode 3122A is disposed on the lower surface of the cover plate 502, and the first electrode 3122A is specifically a conductive ink layer, and the conductive ink layer is directly covered on the cover plate by a silk screen process, for example The bottom surface of 502. The second electrode 3122B is disposed under the first electrode 3122A through the glue 600, and the fingerprint chip is disposed on the substrate 501 of the fingerprint chip, so that the touch detection electrode is hidden in the fingerprint module in.

11 is a schematic diagram of the external form of the fingerprint module in Example 11 of the present application; FIG. 12 is a schematic diagram of the external form of the fingerprint module in the prior art; as shown in FIG. 11, in the overall external form, due to touch The detection electrode is hidden in the fingerprint module 302, therefore, the touch detection electrode is not visible to the outside, and when assembled to form the door lock, it will not form a short circuit with the lock body. In contrast, as shown in FIG. 12, in the overall external form, since the touch detection electrode is exposed to the fingerprint module 302, the touch detection electrode is visible to the outside, and when assembled to form the door lock, The lock body forms a short circuit.

FIG. 13 is a schematic diagram of a touch detection electrode on the lower surface of the cover plate 502 of the fingerprint module in the twelfth embodiment of the present application; in this embodiment, self-capacitance is used as an example to realize the wake-up. As described above, the touch detection electrode is set The conductive pad or conductive ink layer on the lower surface of the cover plate 502. In this embodiment, from the direction of the upper surface of the cover plate 502 to the substrate 501, the cover plate 502, the touch detection electrode, the fingerprint chip 322, the substrate 501, and the system ground are provided in this order. The capacitance and touch detection electrodes are connected to the substrate through traces.

When the above-mentioned fingerprint module is mounted on the handle or the door panel, the distance from the finger to the cover plate 502, the touch detection electrode, the fingerprint chip 322, the substrate 501, and the system ground in this order.

An embodiment of the present application further provides a touch wake-up module, which includes: the touch detection unit in the above embodiment and a wake-up capacitor composed of a first electrode and a second electrode, the first electrode or the second electrode serving as a touch Detection electrode, the touch detection electrode is hidden in the fingerprint module; the touch detection unit is used to detect the capacitance change amount of the wake-up capacitor before and after the finger touch, so as to determine the capacitance change amount and setting of the wake-up capacitor When the wake-up conditions match, the fingerprint chip is fingerprinted by the fingerprint chip when the power is turned on to start the fingerprint chip.

The touch wake-up module in the above embodiment may be made that the touch wake-up chip exists separately from the fingerprint chip, or may be integrated into the fingerprint chip, or the fingerprint chip may be integrated into the touch wake-up chip.

So far, specific embodiments of the subject matter have been described. Other embodiments are within the scope of the following claims. In some cases, the actions recited in the claims can be performed in a different order and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the particular order shown or sequential order to achieve the desired result. In certain embodiments, multitasking and parallel processing may be advantageous.

It should also be noted that the terms "include", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device that includes a series of elements not only includes those elements, but also includes Other elements not explicitly listed, or include elements inherent to such processes, methods, goods, or equipment. Without more restrictions, the element defined by the sentence "include one ..." does not exclude that there are other identical elements in the process, method, commodity, or equipment that includes the element.

The embodiments in this specification are described in a progressive manner. The same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant part can be referred to the description of the method embodiment.

The above is only an embodiment of the present application, and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the scope of the claims of this application.

Claims

A fingerprint module is characterized by comprising: a cover plate, a touch wake-up module and a fingerprint chip, the touch wake-up module includes: a touch detection unit and a wake-up capacitor composed of a first electrode and a second electrode, the first The electrode or the second electrode is used as a touch detection electrode, and the touch detection electrode is hidden in the fingerprint module; the touch detection unit is used to detect the capacitance change amount of the wake-up capacitor before and after a finger touch; the fingerprint chip It is used for powering on when the capacitance change amount of the wake-up capacitor matches the set wake-up condition to perform fingerprint identification on the finger.
The fingerprint module according to claim 1, wherein the touch detection electrode is a conductive pad or a conductive ink layer.
The fingerprint module according to claim 1, wherein the second electrode and the first electrode form a self-capacitance, and the self-capacitance is used as the wake-up capacitance.
The fingerprint module according to claim 3, wherein the second electrode is systematically, correspondingly, the first electrode serves as the touch detection electrode and is provided on the fingerprint chip together with the fingerprint chip On the substrate of the fingerprint chip; or, the first electrode is provided on the lower surface of the cover plate, and the fingerprint chip is provided on the substrate of the fingerprint chip.
The fingerprint module according to claim 3, wherein the first electrode is systematically, correspondingly, the second electrode serves as the touch detection electrode and is provided on the fingerprint chip together with the fingerprint chip On the substrate of the fingerprint chip; or, the second electrode serves as the touch detection electrode and is provided on the lower surface of the cover plate, and the fingerprint chip is provided on the substrate of the fingerprint chip.
The fingerprint module according to any one of claims 2-5, wherein the first electrode is a ring electrode.
The fingerprint module according to claim 1, wherein the second electrode and the first electrode form a mutual capacitance, and the mutual capacitance serves as the wake-up capacitance.
The fingerprint module according to claim 7, wherein the second electrode is provided on the upper surface of the cover plate, and correspondingly, the first electrode serves as the touch detection electrode and is in contact with the fingerprint chip It is provided together on the substrate of the fingerprint chip; or, the first electrode is provided on the lower surface of the cover plate, and the fingerprint chip is provided on the substrate of the fingerprint chip.
The fingerprint module according to claim 7, wherein the first electrode is provided on the upper surface of the cover plate, and correspondingly, the second electrode serves as the touch detection electrode and is in contact with the fingerprint The chips are provided on the substrate of the fingerprint chip together; or, the second electrode is provided on the lower surface of the cover plate, and the fingerprint chip is provided on the substrate of the fingerprint chip.
The fingerprint module according to any one of claims 7-9, wherein the second electrode is a ring electrode.
The fingerprint module according to claim 1, wherein the fingerprint chip is further used to be in a power-down state when the capacitance change amount of the wake-up capacitor does not match the set wake-up condition.
A touch wake-up module, characterized by comprising: a touch detection unit and a wake-up capacitor composed of a first electrode and a second electrode, the first electrode or the second electrode serving as a touch detection electrode, and the touch detection electrode Hidden in the fingerprint module; the touch detection unit is used to detect the capacitance change amount of the wake-up capacitor before and after the finger touches to start when the capacitance change amount of the wake-up capacitor matches the set wake-up condition The fingerprint chip performs fingerprint identification on the finger.
A door lock, characterized in that it includes a microprocessor and the fingerprint module according to any one of claims 1-11, the touch detection electrode faces the direction of being touched by a finger, and the amount of capacitance change in the wake-up capacitor When matching with the set wake-up condition, the microprocessor is used to activate the fingerprint chip to perform fingerprint identification on the finger and perform an unlocking action after the fingerprint identification is successful.
The door lock according to claim 13, wherein when the amount of change in the capacitance of the wake-up capacitor matches the set wake-up condition, the touch detection unit generates an interrupt signal and transmits it through the touch detection electrode to make The microprocessor activates the fingerprint chip.