CN112954277B

CN112954277B - Doorbell camera

Info

Publication number: CN112954277B
Application number: CN202110247368.8A
Authority: CN
Inventors: 叶蔚然
Original assignee: Hangzhou Hikvision Digital Technology Co Ltd
Current assignee: Hangzhou Hikvision Digital Technology Co Ltd
Priority date: 2021-03-05
Filing date: 2021-03-05
Publication date: 2023-03-24
Anticipated expiration: 2041-03-05
Also published as: CN112954277A; WO2022183859A1

Abstract

The application provides a doorbell camera. The doorbell camera comprises a power supply end, a mechanical doorbell, a camera circuit, a charging capacitor and a control circuit. The power supply end is used for being connected with a power supply; the control circuit comprises a linked switch and a controller, the camera circuit, the charging capacitor and the linked switch are connected to the power supply end in parallel, the mechanical doorbell and the linked switch are connected to the power supply end in series, and the controller is connected with the linked switch and used for controlling the on-off of the linked switch; when the linkage switch is connected, the power supply end is used for supplying power to the mechanical doorbell to make the mechanical doorbell sound, and the charging capacitor is used for supplying power to the camera circuit; when the gang switch is disconnected, the power supply end is used for charging the charging capacitor and supplying power to the camera circuit through the mechanical doorbell, and the mechanical doorbell does not make a sound.

Description

Doorbell camera

Technical Field

The application relates to the field of electric bells, in particular to a doorbell camera.

Background

Nowadays, doorbell functions more and more. For example, some doorbell are provided with cameras, when a visitor calls the door through the doorbell, the cameras can shoot the visitor or collect the video image including the visitor, so that the visitor can be identified by the indoor person according to the shot picture or video image, and the safety is improved. However, the cost of the doorbell provided with the camera still needs to be reduced.

Disclosure of Invention

The application provides a modified doorbell camera, and the cost is lower.

The application provides a doorbell camera, includes:

the power supply end is used for being connected with a power supply;

a mechanical doorbell;

a camera circuit;

a charging capacitor;

the control circuit comprises a linked switch and a controller, the camera circuit, the charging capacitor and the linked switch are connected to the power supply end in parallel, the mechanical doorbell and the linked switch are connected to the power supply end in series, and the controller is connected with the linked switch and used for controlling the on-off of the linked switch; when the linkage switch is communicated, the power supply end is used for supplying power to the mechanical doorbell to make the mechanical doorbell sound, and the charging capacitor is used for supplying power to the camera circuit; when the gang switch is disconnected, the power supply end is used for passing through mechanical doorbell gives charging capacitor charges and gives the camera circuit power supply, mechanical doorbell does not make a sound.

The application provides a doorbell camera, includes:

the power supply end is used for being connected with a power supply;

a switching circuit including a doorbell switch;

a mechanical doorbell;

a camera circuit;

a charging capacitor;

the control circuit comprises a linked switch, a power supply conversion circuit, a charging circuit and a controller, the mechanical doorbell is respectively connected with the linkage switch and the power supply conversion circuit in series at the power supply end, and the linkage switch is connected with the power supply conversion circuit in parallel; the power supply conversion circuit comprises a conversion output end, the charging capacitor is connected with the conversion output end through the charging circuit, the camera circuit is connected with the conversion output end, the controller is respectively connected with the doorbell switch and the gang switch, and the controller is configured to:

when a first electric signal representing the closing of the doorbell switch is detected, a first control signal is output to control the linkage switch to be communicated, so that the power supply end supplies power to the mechanical doorbell and the mechanical doorbell makes a sound, and the charging capacitor is used for supplying power to the camera circuit;

when detecting the representation the second signal of telecommunication of doorbell switch disconnection, output second control signal control gang switch disconnection to make the feeder ear pass through machinery doorbell gives power conversion circuit power supply makes power conversion circuit will the voltage of power output carries out the conversion back, passes through conversion output exports, in order to give camera circuit power supply, and give through charging circuit charging capacitor charges.

In some embodiments of this application, the doorbell camera includes mechanical doorbell, the camera circuit, charging capacitor and control circuit, control circuit includes linked switch and controller, camera circuit and linked switch parallel connection, mechanical doorbell and linked switch series connection, charging capacitor and camera circuit connection, when the doorbell camera is triggered, the controller can control the linked switch intercommunication, make linked switch short circuit camera circuit, make mechanical doorbell work, charging capacitor can give camera circuit power supply, guarantee that camera circuit normally works. The charging capacitor is used for supplying power to the camera circuit, so that the cost can be lower, and the cost of the doorbell camera is lower.

Drawings

FIG. 1 is a schematic diagram of a doorbell camera provided by one embodiment of the present application;

FIG. 2 is a circuit diagram of the doorbell camera of FIG. 1;

fig. 3 is a schematic view of a mechanical doorbell of the doorbell camera in fig. 2.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "plurality" or "a number of" and the like means at least two. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Unless otherwise indicated, "front," "back," "lower," and/or "upper," and the like are for convenience of description, and are not limited to one position or one spatial orientation. The term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

Fig. 1 is a schematic diagram of a doorbell camera 100 provided by an embodiment of the present application. Referring to fig. 1, a doorbell camera 100 comprises a mechanical doorbell 12 and a camera circuit 13. In some embodiments, the mechanical doorbell 12 may be used to sound a cue, such as a ding-dong sound, when a visitor presses or touches the doorbell camera 100. The camera circuit 13 may be used to take a photograph or capture a video image so that a person in a room can identify a visitor based on the photograph or video image, thereby improving security. The camera circuit 13 may include an IP (Internet Protocol Address) network camera, an analog camera, and the like.

In some embodiments, the doorbell camera 100 comprises a power supply terminal 11, a charging capacitor 14 and a control circuit 15. The power supply terminal 11 is used for connecting with a power supply 19 and includes a first power supply terminal 111 and a second power supply terminal 112. The first power supply terminal 111 and the second power supply terminal 112 are respectively connected to both ends of the power supply 19, so that the power supply 19 can supply power to the doorbell camera 100 through the power supply terminal 11. In the present embodiment, the power supply 19 includes an ac power source, such as a commercial power, the first power supply end 111 is connected to the live line L of the power supply 19, and the second power supply end 112 is connected to the neutral line N of the power supply 19. In other embodiments, the power source 19 comprises a DC power source, such as a battery, the first power terminal 111 is connected to the positive pole of the power source 19, and the second power terminal 112 is connected to the negative pole of the power source 19.

In some embodiments, the charging capacitor 14 is electrically connected with the power supply terminal 11 and the camera circuit 13. The power supply 19 can charge the charging capacitor 14 via the supply terminal 11. The stored power of the charge capacitor 14 may be used to power the camera circuitry 13. The charge capacitor 14 may comprise a super capacitor. The super capacitor is a green environment-friendly power supply, does not pollute the environment, and the charge-discharge circuit is simple, thereby being beneficial to reducing the size of the doorbell camera 100.

In some embodiments, the control circuit 15 includes a ganged switch 151 and a controller 152. The controller 152 is connected to the interlock switch 151 and is configured to control on/off of the interlock switch 151. The controller 152 may control the linked switch 151 to be turned on when the visitor presses or touches the doorbell camera 100; when the visitor stops pressing or touching the doorbell camera 100, the control gang switch 151 is turned off.

In some embodiments, the doorbell camera 100 comprises a doorbell switch 16. The doorbell switch 16 is used to press or touch a visitor. The doorbell switch 16 may be on when pressed or touched and off when not pressed or touched. The controller 152 is connected to the doorbell switch 16 and is configured to detect the on/off state of the doorbell switch 16 and control the on/off state of the linked switch 151 according to the on/off state of the doorbell switch 16. In this embodiment, the controller 152 may detect different electrical signals when the doorbell switch 16 is on and off, respectively. For example, the controller 152 may detect a low level when the doorbell switch 16 is on; when the doorbell switch 16 is open, a high level is detected. When the controller 152 detects an electrical signal (e.g., low level) indicating that the doorbell switch 16 is on, the linked switch 151 is controlled to be on; when an electric signal (for example, a high level) indicating that the doorbell switch 16 is open is detected, the ganged switch 151 is controlled to be open.

In some embodiments, the camera circuit 13, the charging capacitor 14, and the ganged switch 151 are connected in parallel to the power supply terminal 11, and the mechanical doorbell 12 and the ganged switch 151 are connected in series to the power supply terminal 11. When the linked switch 151 is turned on (i.e. when the doorbell switch 16 is turned on by being pressed or touched), the power supply terminal 11 is used for supplying power to the mechanical doorbell 12, so that the mechanical doorbell 12 makes a sound. In some embodiments, when the ganged switch 151 is on, the ganged switch 151 shorts the camera circuit 13 and the charging capacitor 14, and the mechanical doorbell 12 and the ganged switch 151 form a current path. At least most of the voltage of the power supply 19 is applied to both ends of the mechanical doorbell 12, so that the voltage across the mechanical doorbell 12 is enough to drive the mechanical doorbell 12 to work, and the mechanical doorbell 12 sounds a prompt sound. When the mechanical doorbell 12 is in operation, the charging capacitor 14 may be used to power the camera circuitry 13 so that the camera circuitry 13 may function properly, take pictures or capture video images.

In some embodiments, when the ganged switch 151 is off (i.e., the doorbell switch 16 is not pressed or touched to be off), the power terminal 11 is used to charge the charging capacitor 14 through the mechanical doorbell 12 and to power the camera circuitry 13 and the mechanical doorbell 12, and the mechanical doorbell 12 does not sound. In some embodiments, when the ganged switch 151 is turned off, the mechanical doorbell 12 and the camera circuit 13 form a current path, the voltage applied to the two ends of the mechanical doorbell 12 is reduced and is not enough to drive the mechanical doorbell 12 to work, the mechanical doorbell 12 stops playing the prompt sound, the power supply terminal 11 receives the electric energy of the power supply 19 to charge the charging capacitor 14 and supply power to the camera circuit 13, so that when the ganged switch 151 is turned on and the camera circuit 13 is short-circuited, the electric energy stored in the charging capacitor 14 can supply power to the camera circuit 13. In some embodiments, the controller 152 may be connected to the charging capacitor 14 and configured to detect a voltage of the charging capacitor 14, and when the interlock switch 151 is turned on (the charging capacitor 14 is discharged), if the controller 152 detects that the voltage of the charging capacitor 14 is lower than a threshold, the interlock switch 151 may be controlled to be turned off, and the charging capacitor 14 may be charged, so as to ensure that the camera circuit 13 operates normally.

In some embodiments, the doorbell camera 100 of the present application includes a mechanical doorbell 12, a camera circuit 13, a charging capacitor 14, and a control circuit 15, the control circuit 15 includes a ganged switch 151 and a controller 152, the camera circuit 13 is connected in parallel with the ganged switch 151, the mechanical doorbell 12 is connected in series with the ganged switch 151, the charging capacitor 14 is connected with the camera circuit 13, and the controller 152 can control the ganged switch 151 to communicate, so that the ganged switch 151 short-circuits the camera circuit 13, and then the mechanical doorbell 12 works. When the camera circuit 13 is short-circuited, the charging capacitor 14 can supply power to the camera circuit 13, so as to ensure that the camera circuit 13 works normally. The doorbell camera 100 of this application gives camera circuit 13 power supply through charging capacitor 14, compares some doorbell that give camera circuit 13 power supply through the battery, and on the one hand, charging capacitor 14 cost is lower, and charging capacitor 14's charge-discharge circuit is simpler, and corresponding circuit cost is lower. As such, the cost of using the charging capacitor 14 may be lower, and thus the doorbell camera 100 may be lower in cost. On the other hand, the charging and discharging circuit of the charging capacitor 14 is simple, so that the doorbell camera 100 is simple in structure and small in size. On the other hand, the charging capacitor 14 has a better applicability and a more stable performance than a battery. For example, some special occasions may not allow a battery exceeding a threshold capacity to enter, resulting in limited use of the doorbell in those special occasions, while the charging capacitor 14 is not limited in relation thereto, resulting in greater applicability of the doorbell camera 100. For another example, the energy storage of the battery is greatly reduced in a low-temperature environment, which may cause insufficient power supply of a camera circuit in the related art, and the camera cannot normally operate, whereas the doorbell camera 100 of the present application supplies power to the camera circuit 13 through the charging capacitor 14, and the energy storage of the charging capacitor 14 is not limited by environments such as a low temperature, so that the doorbell camera 100 normally operates in a low-temperature environment, and the performance of the doorbell camera 100 is more stable. On the other hand, to traditional doorbell (including mechanical doorbell, not including the camera circuit), doorbell camera 100 of this application can remain the circuit wiring mode of traditional doorbell, on the circuit basis of traditional doorbell, increases camera circuit 13, and the product continuity is better, and it is comparatively convenient to upgrade, has reduced the research and development cost.

With continued reference to fig. 1, in some embodiments, the camera circuitry 13 includes camera function circuitry 1311 and a camera system power supply 1312. The camera function circuit 1311 includes a function block circuit of the camera circuit 13, such as a wireless function circuit, an image sensor circuit, and the like. The controller 152 may be coupled to the camera function circuitry 1311 for controlling operation of the camera function circuitry 1311. The camera system power supply 1312 includes a power supply input terminal IN1 and a power supply output terminal OUT1, the power supply input terminal IN1 is connected to the power supply terminal 11 and the charging capacitor 14, the power supply output terminal OUT1 is connected to the camera function circuit 1311 and the controller 152, and the camera system power supply 1312 is configured to convert a voltage input through the power supply input terminal IN1 into an operating voltage of the camera function circuit 1311 to supply power to the camera function circuit 1311 and the controller 152. IN some embodiments, when the ganged switch 151 is turned on and the mechanical doorbell 12 is IN operation, the camera system power supply 1312 may convert the voltage input from the charging capacitor 14 through the power input IN1 into the operating voltage of the camera function circuit 1311 and the controller 152; when the interlock switch 151 is turned off and the mechanical doorbell 12 stops operating, the camera system power supply 1312 may convert the voltage from the power supply 19 via the power supply terminal 11 and the power supply input terminal IN1 into the operating voltage for the camera function circuit 1311 and the controller 152.

IN some embodiments, the operating voltages of the functional module circuits of the camera circuit 13 may be different, and the camera system power supply 1312 converts the voltage input through the power supply input terminal IN1 into different voltages, such as 3.3 volts, 1.8 volts, 1.9 volts, etc., respectively, to supply power to the functional module circuits of the camera circuit 13, respectively. The camera system power supply 1312 may include a plurality of power supply output terminals OUT1. The voltages output by the different power supply output terminals OUT1 are different. The functional block circuits of the camera circuit 13 are connected to different power supply output terminals OUT1, respectively.

In some embodiments, when the ganged switch 151 is turned off and the power supply 19 supplies power to the camera circuit 13 through the power supply terminal 11, the camera system power supply 1312 controls the power supply 19 to charge the charging capacitor 14 after the power supply voltage of each functional module circuit of the camera circuit 13 reaches the required voltage. In this way, when the camera system power source 1312 is not completely started, the charging current of the charging capacitor 14 is too large, which affects the starting of the camera system power source 1312, and thus the power supply voltage of at least part of the functional module circuits of the camera circuit 13 cannot reach the required voltage, which affects the normal operation of the camera circuit 13.

In some embodiments, the control circuit 15 includes a charging circuit 153, the charging circuit 153 is connected between the power supply terminal 11 and the charging capacitor 14 for charging the charging capacitor 14; the camera system power source 1312 is connected to the charging circuit 153, and is used for controlling whether the charging circuit 153 starts to operate. The camera system power supply 1312 may control the power supply 19 to charge the charging capacitor 14 by controlling whether the charging circuit 153 is enabled. Specifically, the camera system power supply 1312 may control the charging circuit 153 to start up to charge the charging capacitor 14 after the power supply voltage of each functional module circuit of the camera circuit 13 reaches the required voltage. After the charging circuit 153 starts to operate, the power supply 19 charges the charging capacitor 14 through the power supply terminal 11 and the charging circuit 153. In some embodiments, the charging circuit 153 may also perform charging control on the charging capacitor 14, for example, after the charging capacitor 14 is charged, the charging circuit 153 may stop charging the charging capacitor 14.

IN some embodiments, the control circuit 15 includes a first diode D262, an anode of the first diode D262 is connected to the power supply terminal 11, and a cathode of the first diode D262 is connected to the power supply input terminal IN1 of the camera system power source 1312. The first diode D262 prevents current from flowing from the camera system power supply 1312 to the power supply 19 and back-charges the power supply 19, while also preventing power loss due to the back current.

In some embodiments, the control circuit 15 includes a second diode D272, an anode of the second diode D272 is connected to the power supply terminal 11, and a cathode of the second diode D272 is connected to the charging circuit 153. The second diode D272 prevents current from flowing from the charging capacitor 14 to the power supply 19 to charge the power supply 19 in the reverse direction, and also prevents power loss due to the reverse current.

IN some embodiments, the control circuit 15 includes a third diode D282, an anode of the third diode D282 is connected to the charging capacitor 14, and a cathode of the third diode D282 is connected to the power input terminal IN1 of the camera system power source 1312. The third diode D282 prevents the camera system power supply 1312 from charging the charging capacitor 14 in the reverse direction, and also prevents power loss due to reverse current.

IN some embodiments, the control circuit 15 includes a power conversion circuit 154, and the power conversion circuit 154 is connected between the power supply terminal 11 and the power supply input terminal IN1 of the camera system power supply 1312 and between the power supply terminal 11 and the charging circuit 153 for converting the ac power output by the power supply 19 into dc power to power the camera circuit 13 and charge the charging capacitor 14. The power conversion circuit 154 may convert a strong ac power into a weak dc power, for example, 5.2 v, and output the weak dc power to the camera circuit 13 and charge the charging capacitor 14. Thus, the unconverted current is prevented from being excessively large, and the camera circuit 13 and the charging capacitor 14 are prevented from being damaged.

Fig. 2 is a circuit diagram of the doorbell camera 100 in fig. 1. Referring to fig. 2, in some embodiments, the doorbell camera 100 comprises a switching circuit 17, the switching circuit 17 comprising a first resistor RT1, a second resistor RT2, and a switch detection power supply 171. The controller 152 includes a detection terminal BELL _ BUTTON. The first resistor RT1 and the doorbell switch 16 are connected in series between the switch detection power supply 171 and ground, and the detection terminal BELL _ BUTTON is connected between the first resistor RT1 and the doorbell switch 16 through the second resistor RT 2. The doorbell switch 16 is connected when being pressed or touched, the detection terminal BELL _ BUTTON is grounded through the second resistor RT2, and a low level (a switch trigger signal of the doorbell switch 16) is detected; the doorbell switch 16 is turned off when not pressed or touched, and the detection terminal BELL _ BUTTON is connected to the switch detection power supply 171 through the first resistor RT1 and the second resistor RT2, and detects a high level (a switch release signal of the doorbell switch 16). The controller 152 determines the on/off of the doorbell switch 16 (i.e., whether the doorbell switch 16 is pressed or touched) according to the level signal detected by the detection terminal BELL _ BUTTON. The duration of the low level is the duration of the doorbell switch 16 being pressed.

In some embodiments, controller 152 includes a control terminal BELL _ CTL. When the controller 152 detects that the doorbell switch 16 is pressed or touched through the detection terminal BELL _ BUTTON, the linkage switch 151 is controlled to be communicated through the control terminal BELL _ CTL. In this embodiment, the interlock switch 151 includes a thyristor Q1. The control end BELL _ CTL is connected with a control pole of the controlled silicon Q1, a first pole T1 of the controlled silicon Q1 is connected with a live wire L of a power supply 19 (see figure 1) through a mechanical doorbell 12, and a second pole T2 of the controlled silicon Q1 is connected with a zero line N of the power supply 19. The camera circuit 13 is connected in parallel to the thyristor Q1 through the power conversion circuit 154. When the doorbell switch 16 is pressed or touched, the controller 152 controls the conduction of the thyristor Q1 through the control terminal BELL _ CTL, the power conversion circuit 154 and the subsequent circuits thereof are short-circuited, and the mechanical doorbell 12 operates. The controller 152 may continuously output an electrical signal (for example, a high level) for turning on the thyristor Q1 through the control terminal BELL _ CTL according to a time period during which the mechanical doorbell 12 needs to operate, so as to avoid a problem that the thyristor Q1 is automatically turned off at an ac zero crossing point, which may cause the mechanical doorbell 12 to fail to operate. When the doorbell switch 16 is not pressed or touched, the controller 152 does not output an electrical signal to turn on the thyristor Q1 through the control terminal BELL _ CTL, and thus, the thyristor Q1 is turned off at the ac zero crossing point and is not turned on.

Fig. 3 is a schematic view of the mechanical doorbell 12 of fig. 2. Referring to fig. 3, the mechanical doorbell 12 comprises a coil 121, an electromagnet 122, a doorbell hammer 123, an elastic device 125, and a baffle 124 (also referred to as a tone bar). The hammer 123 is disposed between the electromagnet 122 and the damper 124, and the coil 121 is connected in series between the live line L and the neutral line N of the power supply 19. When the interlock switch 151 is turned on, the coil 121 is energized, the electromagnet 122 is magnetized, the door bell 123 is attracted, the door bell 123 strikes the electromagnet 122, and a first sound (e.g., "ding") is generated, and at the same time, the elastic device 125 is compressed. When the linked switch 151 is turned off, the voltage on the coil 121 is low, the current is low, the electromagnet 122 generates insufficient magnetism to attract the doorbell hammer 123, the doorbell hammer 123 is released, and under the action of the elastic device 125, the baffle 124 is hit, and a second sound (e.g., "clang") can be emitted. Thus, a complete doorbell sound (e.g., "ding-dong") is formed. In some embodiments, the controller 152 may control the conduction of the ganged switch 151 to control the sound effect duration of the mechanical doorbell 12 when detecting the conduction of the doorbell switch 16. Wherein, the sound effect duration of the mechanical doorbell 12 is consistent with the conduction duration of the doorbell switch 16. The doorbell switch 16 is different in conduction time (the doorbell switch 16 is different in pressed time), and different in doorbell sound effect.

With continued reference to fig. 2, in some embodiments, the control circuit 15 includes an isolation circuit 155. The isolation circuit 155 is connected between the controller 152 and the ganged switch 151, and the controller 152 controls the on/off of the ganged switch 151 by controlling the isolation circuit 155. The isolating circuit 155 is used for isolating a strong current circuit where the linked switch 151 is located and a weak current circuit where the controller 152 is located, so as to protect the controller 152 and prevent the controller 152 from being damaged due to the fact that the weak current circuit where the controller 152 is located is connected to strong current. In this embodiment, the isolation circuit 155 is connected between the controller 152 and the gate of the thyristor Q1. The isolation circuit 155 includes a photo coupler OP1 and an isolation power supply 1551, and the photo coupler OP1 is connected between the control terminal BELL _ CTL of the controller 152 and the control electrode of the thyristor Q1, and is connected to the isolation power supply 1551. The controller 152 controls the on/off of the thyristor Q1 by controlling the on/off of the photocoupler OP 1. In some embodiments, the control circuit 15 includes a transistor Q2, a base of the transistor Q2 is connected to the control terminal BELL _ CTL of the controller 152, one of a collector and an emitter of the transistor Q2 is connected to the photocoupler OP1 and is connected to the isolated power supply 1551 through the photocoupler OP1, the other of the collector and the emitter of the transistor Q2 is grounded, and the controller 152 controls the on/off of the photocoupler OP1 by controlling the on/off of the transistor Q2.

In some embodiments, the isolation circuit 155 includes a third resistor R31 and a fourth resistor R32, one end of the third resistor R31 is connected to the isolation power supply 1551, and the other end of the third resistor R31 is connected to the photo coupler OP1, so as to limit the current of the photo coupler OP1 and prevent the photo coupler OP1 from being damaged due to an excessive current. One end of the fourth resistor R32 is connected to the control end BELL _ CTL of the controller 152, the other end of the fourth resistor R32 is connected to the base of the transistor Q2, and the fourth resistor R32 can limit the base current of the transistor Q2, so that the base current of the transistor Q2 is prevented from being too large, and the transistor Q2 is prevented from being damaged.

In some embodiments, power conversion circuit 154 includes an over-current protection device F1, a rectifier DB2, a buck capacitor CP1, filter capacitors C220, C3, and a surge protector U19. The rectifier DB2 is connected to the live line L and the neutral line N of the power supply 19, respectively, and is configured to convert the ac power output by the power supply 19 into dc power. The step-down capacitor CP1 is connected to the rectifier DB2, and is configured to step down the dc voltage output by the rectifier DB2 to output a weak dc power to power the camera circuit 13 and the controller 152. The filter capacitors C220, C3 and the surge protector U19 are connected in parallel with the step-down capacitor CP1 to the rectifier. The filter capacitors C220 and C3 are used for filtering the dc weak current output by the power conversion circuit 154, so as to improve the voltage stability. The surge protector U19 can perform surge protection on the power conversion circuit 154 and the circuit components of the subsequent circuits, and prevent the circuit components from being damaged by surge signals generated in the circuits. The over-current protection device F1 is connected in series between the live line L of the power supply 19 and the rectifier DB2 for over-current protection of the power conversion circuit 154 and the subsequent circuits.

IN this embodiment, the control circuit 15 includes a wide voltage DC circuit 156, and the wide voltage DC circuit 156 is connected to the power conversion circuit 154, and is configured to convert the voltage converted and output by the power conversion circuit 154 into a desired voltage (e.g., 5.2 v) according to an input voltage required by a power supply input terminal IN1 of the camera system power source 1312 and a charging voltage required by the charging capacitor 14, so that the voltage converted and output by the wide voltage DC circuit 156 is input into the camera system power source 1312 through the power supply input terminal IN1 after passing through the first diode D262 or the second diode D272, and is the desired input voltage (e.g., 5 v) or the desired charging voltage (e.g., 5 v) for the charging capacitor 14. In other embodiments, the wide voltage DC circuit 156 need not be provided if the voltage output by the power conversion circuit 154 is a satisfactory voltage (e.g., 5.2 volts).

In some embodiments, the camera system power source 1312 includes a charging control terminal CAP _ EN, which is connected to the charging circuit 153. After the power supply voltage of each functional circuit module of the camera functional circuit 1311 reaches the required voltage, the camera system power supply 1312 controls the charging circuit 153 to start up through the charging control terminal CAP _ EN.

In the present embodiment, the charging circuit 153 includes a charging chip UP1. The charging chip UP1 is connected to the charging capacitor 14, and is configured to perform charging control on the charging capacitor 14. The charging chip UP1 includes a charging enable terminal ENUV. The camera system power supply 1312 is connected to the charge enable terminal ENUV of the charge chip UP1 through the charge control terminal CAP _ EN, and after the power supply voltages of the functional circuit modules of the camera functional circuit 1311 reach the required voltages, the camera system power supply 1312 sends a control signal indicating that charging is to be started to the charge chip UP1 through the charge control terminal CAP _ EN, so that the charge chip UP1 can charge the charge capacitor 14. In some embodiments, the charging circuit 153 includes a fifth resistor R34 and a sixth resistor R33, the fifth resistor R34 is connected in series between the charging control terminal CAP _ EN and the charging enable terminal ENUV, and the sixth resistor R33 is connected in series between the charging enable terminal ENUV and the wide voltage DC circuit 156.

IN some embodiments, the charging chip UP1 includes a charging input terminal IN and a charging output terminal OUT, the charging input terminal IN is connected to the wide voltage DC circuit 156 through the second diode D272. The anode of the second diode D272 is connected to the wide voltage DC circuit 156, and the cathode of the second diode D272 is connected to the charging input terminal IN, so as to prevent current from flowing from the charging chip UP1 to the wide voltage DC circuit. The charging output terminal OUT is connected to the charging capacitor 14. The voltage converted and output by the wide voltage DC circuit 156 is input to the charging chip UP1 through the second diode D272, and the charging chip UP1 charges the charging capacitor 14.

In some embodiments, the charging circuit 153 includes a first capacitor C31 and a second capacitor C32. The first capacitor C31 and the second capacitor C32 are connected IN parallel between the charging input terminal IN and the ground, and can filter the voltage output by the wide voltage DC circuit 156 to the charging chip UP1, so as to ensure that the signal received by the charging chip UP1 is more stable.

In some embodiments, the charging circuit 153 includes a charging resistor RP8, the charging resistor RP8 is connected to the charging chip UP1, and the charging chip UP1 controls the magnitude of the charging current of the charging capacitor 14 according to the magnitude of the charging resistor RP 8. The resistance of the charging resistor RP8 can be set according to actual needs to control the magnitude of the charging current of the charging capacitor 14. In some embodiments, after the charging of the charging capacitor 14 is completed, the charging chip UP1 may stop charging the charging capacitor 14. In other embodiments that do not include the wide voltage DC circuit 156, the charging chip UP1 may be directly connected to the power conversion circuit 154 via the second diode D272.

In some implementations, the charging circuit 153 includes a third capacitor C33 and a seventh resistor R35, and the third capacitor C33 and the seventh resistor R35 are connected in parallel between the charging chip UP1 and the ground.

In some embodiments, the doorbell camera 100 comprises at least two charging capacitors 14, the at least two charging capacitors 14 being connected in series to the charging circuit 153. In the present embodiment, the doorbell camera 100 includes two charging capacitors 14, and the two charging capacitors 14 are connected in series between the charging chip UP1 and the ground. In this way, when the voltage of the single charging capacitor 14 is not enough to drive the camera circuit 13, the at least two charging capacitors 14 connected in series can provide a larger supply voltage to the outside.

In some embodiments, control circuit 15 includes a BOOST circuit (not shown), such as a BOOST circuit. The booster circuit is connected between the charge capacitor 14 and the camera system power supply 1312, and boosts the voltage of the charge capacitor 14 and outputs the boosted voltage to the camera system power supply 1312. In this way, when the capacity of the charging capacitor 14 cannot meet the requirement, the capacity utilization rate of the charging capacitor 14 can be improved by the booster circuit. For example, if the capacity of the charging capacitor 14 is insufficient when the booster circuit is not provided, the voltage of the charging capacitor 14 may decrease from 5 volts to 4 volts, and the camera system power supply 1312 may no longer be supplied with power. However, if the voltage of the charging capacitor 14 is reduced from 5 v to 2.5 v by the boost circuit, the camera system power source 1312 can still be supplied with power normally, so that the capacity utilization rate of the charging capacitor 14 is improved. In other embodiments, if the capacity of the charging capacitor 14 meets the requirement, the boost circuit is not provided, so as to reduce the circuit cost.

In some embodiments, the control circuit 15 includes at least two voltage dividing resistors RP10 and RP11, each charging capacitor 14 may correspond to a different voltage dividing resistor RP10 and RP11, each charging capacitor 14 is connected in parallel with a corresponding voltage dividing resistor RP10 and RP11, and the resistance values of the voltage dividing resistors RP10 and RP11 connected in parallel with each charging capacitor 14 are equal. Therefore, the voltage distribution on each charging capacitor 14 is uniform, and the situation that some charging capacitors 14 are charged or discharged completely and other charging capacitors 14 are not charged or discharged completely is avoided.

In some embodiments, the control circuit 15 includes a voltage detection circuit 157, the voltage detection circuit 157 is connected between the controller 152 and the charging capacitor 14, and the controller 152 is configured to detect the voltage of the charging capacitor 14 through the voltage detection circuit 157, and control the ganged switch 151 to be turned off when the voltage of the charging capacitor 14 is lower than a threshold value. Therefore, the charging capacitor 14 can be charged in time, and the camera circuit 13 can be supplied with power in time through the power supply 19, so that the normal operation of the camera circuit 13 is ensured.

In some embodiments, the voltage detection circuit 157 may include a first voltage dividing resistor R161 and a second voltage dividing resistor R162, and the first voltage dividing resistor R161 and the second voltage dividing resistor R162 are connected in series between the charging capacitor 14 and the ground to divide the voltage of the charging capacitor 14. The controller 152 is connected between the first voltage dividing resistor R161 and the second voltage dividing resistor R162, and detects the divided voltage to determine the voltage of the charging capacitor 14. The circuit is simpler.

Referring to fig. 1 and 2, the present application provides a doorbell camera 100. The doorbell camera 100 comprises a power supply terminal 11, a switching circuit 17, a mechanical doorbell 12, a camera circuit 13 and a charging capacitor 14, wherein the power supply terminal 11 is used for being connected with a power supply 19; the switch circuit 17 includes a doorbell switch 16; the control circuit 15 comprises a linked switch 151, a power supply conversion circuit 154, a charging circuit 153 and a controller 152, the mechanical doorbell 12 is respectively connected with the linked switch 151 and the power supply conversion circuit 154 in series at the power supply end 11, and the linked switch 151 is connected with the power supply conversion circuit 154 in parallel; the power conversion circuit 154 includes a conversion output terminal DC _ WIDE, the charging capacitor 14 is connected to the conversion output terminal DC _ WIDE through the charging circuit 153, the camera circuit 13 is connected to the conversion output terminal DC _ WIDE, the controller 152 is connected to the doorbell switch 16 and the gang switch 151, respectively, and the controller 152 is configured to:

when a first electric signal indicating that the doorbell switch 16 is closed is detected, a first control signal is output to control the linkage switch 151 to be connected, so that the power supply end 11 supplies power to the mechanical doorbell 12, the mechanical doorbell 12 makes a sound, and the charging capacitor 14 is used for supplying power to the camera circuit 13;

when the second electric signal indicating that the doorbell switch 16 is turned off is detected, the second control signal is output to control the ganged switch 151 to be turned off, so that the power supply terminal 11 supplies power to the power conversion circuit 154 through the mechanical doorbell 12, the power conversion circuit 154 converts the voltage output by the power supply 19, outputs the converted voltage through the conversion output terminal DC _ WIDE to supply power to the camera circuit 13, and charges the charging capacitor 14 through the charging circuit 153.

In some embodiments, the switch circuit 17 includes a first resistor RT1, a second resistor RT2, and a switch detection power supply 171, the controller 152 includes a detection terminal BELL _ BUTTON, the first resistor RT1 and the doorbell switch 16 are connected in series between the switch detection power supply 171 and ground, the switch detection power supply 171 is connected to the doorbell switch 16 through the first resistor RT1, the detection terminal BELL _ BUTTON is connected between the first resistor RT1 and the doorbell switch 16 through the second resistor RT2, the switch circuit 17 is configured to:

when the doorbell switch 16 is closed, a first electrical signal is generated to the controller 152;

when the doorbell switch 16 is open, a second electrical signal is generated to the controller 152.

In some embodiments, the control circuit 15 includes an isolation circuit 155, the isolation circuit 155 is connected between the controller 152 and the ganged switch 151, the controller 152 is configured to control the on/off of the ganged switch 151 by controlling the isolation circuit 155, and the controller 152 is configured to:

when a first electric signal indicating that the doorbell switch 16 is closed is detected, a first control signal is output to control the isolation circuit 155 to be electrified so as to control the ganged switch 151 to be connected;

when the second electric signal indicating that the doorbell switch 16 is turned off is detected, the second control signal is output to control the isolation circuit 155 to be powered off to control the ganged switch 151 to be turned off.

In some embodiments, the gang switch 151 includes a thyristor Q1, the controller 152 includes a control terminal BELL _ CTL, the isolation circuit 155 includes a photocoupler OP1 and an isolation power supply 1551, the control circuit 15 includes a transistor Q2, a base of the transistor Q2 is connected to the control terminal BELL _ CTL of the controller 152, one of a collector and an emitter of the transistor Q2 is connected to the photocoupler OP1 and to the isolation power supply 1551 through the photocoupler OP1, the other of the collector and the emitter of the transistor Q2 is grounded, the thyristor Q1 is connected to the photocoupler OP1, and the controller 152 is configured to:

when a first electric signal indicating that the doorbell switch 16 is closed is detected, a first control signal is output to control the conduction of the triode Q2 so as to control the electrification of the photoelectric coupler OP1 and further control the connection of the silicon controlled rectifier Q1;

when a second electric signal representing the disconnection of the doorbell switch 16 is detected, a second control signal is output to control the disconnection of the triode Q2 so as to control the disconnection of the photoelectric coupler OP1 and further control the disconnection of the controllable silicon Q1.

In some embodiments, the power conversion circuit 154 includes an overcurrent protection device F1, a rectifier DB2, a buck capacitor CP1, filter capacitors C220 and C3, and a surge protector U19, the rectifier DB2 is connected to the power supply terminal 11 through a mechanical doorbell 12 for converting the ac power output by the power supply 19 into DC power, the filter capacitors C220 and C3, the surge protector U19, and the buck capacitor CP1 are connected in parallel between the rectifier DB2 and the conversion output terminal DC _ WIDE, and the overcurrent protection device F1 is connected in series between the mechanical doorbell 12 and the rectifier DB 2.

IN some embodiments, the camera circuit 13 includes a camera function circuit 1311 and a camera system power supply 1312, the camera system power supply 1312 includes a power supply input terminal IN1 and a power supply output terminal OUT1, the power supply input terminal IN1 is connected to the conversion output terminal DC _ WIDE and the charging capacitor 14, the power supply output terminal OUT1 is connected to the camera function circuit 1311, the charging capacitor 14 supplies power to the camera circuit 13 through the power supply input terminal IN1 when the interlock switch 151 is connected, the power conversion circuit 154 converts the voltage output by the power supply 19 and outputs the converted voltage through the conversion output terminal DC _ WIDE to supply power to the camera circuit 13 and charge the charging capacitor 14 through the charging circuit 153 when the interlock switch 151 is disconnected, and the camera system power supply 1312 is configured to convert the voltage input through the power supply input terminal IN1 into an operating voltage of the camera function circuit 1311 and supply power to the camera function circuit 1311.

In some embodiments, the camera system power supply 1312 includes a charging control terminal CAP _ EN, the charging circuit 153 includes a charging chip UP1, the charging capacitor 14 is connected to the converting output terminal DC _ WIDE via the charging chip UP1, the charging control terminal CAP _ EN is connected to the charging chip UP1, and the charging chip UP1 is configured to:

if a control signal which is output by a charging control end CAP _ EN and indicates that charging is started is received, charging of a charging chip UP1 is started;

if a control signal which is output by the charging control terminal CAP _ EN and indicates that charging is not started is received, charging of the charging chip UP1 is not started.

IN some embodiments, the control circuit 15 includes a WIDE voltage DC circuit, which is connected between the converting output terminal DC _ WIDE and the charging chip UP1, and between the converting output terminal DC _ WIDE and the power supply input terminal IN1 of the camera system power supply 1312, and is configured to convert and output the voltage output from the converting output terminal DC _ WIDE to the camera system power supply 1312 and the charging capacitor 14 according to the input voltage required by the power supply input terminal IN1 of the camera system power supply 1312 and the charging voltage required by the charging capacitor 14.

IN some embodiments, the control circuit 15 includes a first diode D262, an anode of the first diode D262 is connected to the conversion output terminal DC _ WIDE, and a cathode of the first diode D262 is connected to the power supply input terminal IN1 of the camera system power supply 1312; and/or

The control circuit 15 includes a second diode D272, an anode of the second diode D272 is connected to the conversion output terminal DC _ WIDE, and a cathode of the second diode D272 is connected to the charging chip UP1; and/or

The control circuit 15 includes a third diode D282, an anode of the third diode D282 is connected to the charging capacitor 14, and a cathode of the third diode D282 is connected to the power supply input terminal IN1 of the camera system power supply 1312.

In some embodiments, the control circuit 15 includes a voltage detection circuit 157, the voltage detection circuit 157 is connected between the controller 152 and the charging capacitor 14, and the controller 152 is configured to detect the voltage of the charging capacitor 14 through the voltage detection circuit 157, and control the ganged switch 151 to be turned off when the voltage of the charging capacitor 14 is lower than a threshold value.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A doorbell camera, comprising:

the power supply end is used for being connected with a power supply;

a mechanical doorbell;

a camera circuit;

a charging capacitor electrically connected with the power supply terminal and the camera circuit;

the control circuit comprises a linked switch and a controller, the camera circuit, the charging capacitor and the linked switch are connected to the power supply end in parallel, the mechanical doorbell and the linked switch are connected to the power supply end in series, and the controller is connected with the linked switch and used for controlling the on-off of the linked switch; the doorbell camera comprises a doorbell switch, the doorbell switch is connected with the controller, the controller is used for detecting the on-off of the doorbell switch, and the on-off of the linkage switch is controlled according to the on-off of the doorbell switch; when the linkage switch is communicated, the power supply end is used for supplying power to the mechanical doorbell to make the mechanical doorbell sound, and the charging capacitor is used for supplying power to the camera circuit; when the linkage switch is disconnected, the power supply end is used for charging the charging capacitor and supplying power to the camera circuit through the mechanical doorbell, and the mechanical doorbell does not make a sound;

doorbell switch still includes switch circuit, switch circuit includes first resistance, second resistance and switch detection power, the controller includes the sense terminal, first resistance with doorbell switch series connection in between switch detection power and the ground, the switch detection power passes through first resistance with doorbell switch connects, the sense terminal passes through second resistance connect in first resistance with between the doorbell switch, switch circuit is set up to:

when the doorbell switch is closed, generating a first electrical signal to the controller;

and when the doorbell switch is disconnected, a second electric signal is generated to the controller.

2. The doorbell camera of claim 1, wherein: the camera circuit comprises a camera function circuit and a camera system power supply, the camera system power supply comprises a power supply input end and a power supply output end, the power supply input end is connected with the power supply end and the charging capacitor, the power supply output end is connected with the camera function circuit, and the camera system power supply is used for converting voltage input through the power supply input end into working voltage of the camera function circuit, namely, supplying power to the camera function circuit.

3. The doorbell camera of claim 2, wherein: the control circuit comprises a charging circuit, and the charging circuit is connected between the power supply end and the charging capacitor and is used for charging the charging capacitor and/or controlling the charging of the charging capacitor; the camera system power supply is connected with the charging circuit and used for controlling whether the charging circuit starts to work or not.

4. The doorbell camera of claim 2, wherein: the control circuit comprises a booster circuit, and the booster circuit is connected between the charging capacitor and the camera system power supply and used for boosting the voltage of the charging capacitor and outputting the boosted voltage to the camera system power supply.

5. The doorbell camera of claim 1, wherein: the controller is detecting when the doorbell switch switches on, control linked switch switches on, in order to control mechanical doorbell's audio is long, mechanical doorbell's audio is long with it is unanimous long when switching on of doorbell switch.

6. The doorbell camera of claim 1, wherein: the control circuit comprises an isolation circuit, the isolation circuit is connected between the controller and the linkage switch, and the controller is used for controlling the on-off of the linkage switch by controlling the isolation circuit.

7. The doorbell camera of claim 1 wherein the control circuit comprises a voltage detection circuit, the voltage detection circuit connected between the controller and the charging capacitor, the controller configured to detect a voltage of the charging capacitor via the voltage detection circuit, and control the ganged switch to open when the voltage of the charging capacitor is below a threshold; and/or

The charging capacitor comprises a super capacitor;

the ganged switch comprises a controllable silicon.

8. A doorbell camera, comprising:

the power supply end is used for being connected with a power supply;

a switching circuit including a doorbell switch;

a mechanical doorbell;

a camera circuit;

a charging capacitor;

the control circuit comprises a linked switch, a power supply conversion circuit, a charging circuit and a controller, the mechanical doorbell is respectively connected with the linkage switch and the power supply conversion circuit in series to the power supply end, and the linkage switch is connected with the power supply conversion circuit in parallel; the power supply conversion circuit comprises a conversion output end, the charging capacitor is connected with the conversion output end through the charging circuit, the camera circuit is connected with the conversion output end, the controller is respectively connected with the doorbell switch and the gang switch, and the controller is configured to:

when a first electric signal representing the closing of the doorbell switch is detected, a first control signal is output to control the linkage switch to be communicated, so that the power supply end supplies power to the mechanical doorbell, the mechanical doorbell makes a sound, and the charging capacitor supplies power to the camera circuit;

when a second electric signal indicating that the doorbell switch is disconnected is detected, outputting a second control signal to control the linkage switch to be disconnected, so that the power supply end supplies power to the power supply conversion circuit through the mechanical doorbell, the power supply conversion circuit converts the voltage output by the power supply, outputs the voltage through the conversion output end to supply power to the camera circuit, and charges the charging capacitor through a charging circuit;

switch circuit includes first resistance, second resistance and switch detection power, the controller includes the sense terminal, first resistance with doorbell switch series connection in between switch detection power and the ground, the switch detection power passes through first resistance with doorbell switch connects, the sense terminal passes through second resistance connect in first resistance with between the doorbell switch, switch circuit is set up to:

when the doorbell switch is closed, generating the first electrical signal to the controller;

and when the doorbell switch is disconnected, the second electric signal is generated to the controller.

9. The doorbell camera of claim 8, wherein the control circuit comprises an isolation circuit connected between the controller and the ganged switch, the controller to control the switching of the ganged switch by controlling the isolation circuit, the controller configured to:

when the first electric signal representing the closing of the doorbell switch is detected, outputting the first control signal to control the isolation circuit to be electrified so as to control the linkage switch to be communicated;

when the second electric signal representing the disconnection of the doorbell switch is detected, the second control signal is output to control the disconnection of the isolation circuit so as to control the disconnection of the ganged switch.

10. The doorbell camera of claim 8, wherein the power conversion circuit comprises an overcurrent protection device, a rectifier, a buck capacitor, a filter capacitor, and a surge protector, the rectifier being connected to the power supply through the mechanical doorbell for converting ac power output by the power supply to dc power, the filter capacitor, the surge protector, and the buck capacitor being connected in parallel between the rectifier and the conversion output, the overcurrent protection device being connected in series between the mechanical doorbell and the rectifier.

11. The doorbell camera as described in claim 8, wherein the camera circuitry includes camera function circuitry and camera system power supply, the camera system power supply includes a power input and a power output, the power input connects the conversion output with the charging capacitor, the power output connects the camera function circuitry, when the gang switch is on, the charging capacitor supplies power to the camera circuitry through the power input, when the gang switch is off, the power conversion circuitry converts the voltage of the power output and outputs the converted voltage through the conversion output to supply power to the camera circuitry, and charges the charging capacitor through the charging circuit, and the camera system power supply is configured to convert the voltage input through the power input into the operating voltage of the camera function circuitry to supply power to the camera function circuitry.