Electronic system sharing power of doorbell, power supply device thereof, and power supply method thereof

Patent metadata

Field	Value
Publication number	US-9799174-B2
Application number	US-201615076928-A
Country	US
Kind code	B2
Filing date	Mar 22, 2016
Priority date	Jan 4, 2016
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

A power supply device sharing power of a doorbell includes two power contacts, an AC switch, an AC/DC conversion circuit, a doorbell actuator, a supply node, an enabling node, and a control node. When the AC switch is off, the AC/DC conversion circuit receives AC power through the two power contacts, generates DC power according to the AC power, and then outputs the generated DC power through the supply node to supply a post-stage circuit for operating. The doorbell actuator is configured to generate an enabling signal and outputting the generated enabling signal through the enabling node. The control node is configured to receive a control signal relative to the enabling signal, to have the AC switch turned on in response to the control signal to ring the doorbell.

First claim

What is claimed is:

1. A power supply device sharing power of a doorbell, comprising:
two power contacts configured to be respectively connected to two doorbell switch contacts;
an AC switch coupled between the two power contacts and configured to be on according to a control signal, wherein the AC switch is normally off;
a supply node configured to output DC power;
an AC/DC conversion circuit connected in parallel between the two power contacts along with the AC switch, coupled between the two power contacts and the supply node, input ends of the AC/DC conversion circuit are coupled to the two power contacts and to two ends of the AC switch, output end of the AC/DC conversion circuit is coupled to the supply node, and configured to when the AC switch is off, receive AC power via the two power contacts and to generate the DC power according to the AC power;
an enabling node;
a doorbell actuator coupled between the output end of the AC/DC conversion circuit and the enabling node and configured to generate an enabling signal and output the enabling signal via the enabling node; and
a control node coupled to control end of the AC switch and configured to receive the control signal, wherein the control signal is relative to the enabling signal.

2. The power supply device sharing power of a doorbell of claim 1 further comprising:
a control unit coupled to the supply node, the enabling node, and the control node and configured to generate the control signal according to the enabling signal, wherein the control unit is supplied by the DC power.

3. The power supply device sharing power of a doorbell of claim 2 , wherein the AC/DC conversion circuit comprises:
a rectification unit connected in parallel between the two power contacts along with the AC switch.

4. The power supply device sharing power of a doorbell of claim 3 , wherein the AC/DC conversion circuit further comprises:
a step-down converter coupled between the rectification unit and the supply node.

5. The power supply device sharing power of a doorbell of claim 1 , wherein the AC/DC conversion circuit comprises:
a rectification unit connected in parallel between the two power contacts along with the AC switch.

6. The power supply device sharing power of a doorbell of claim 5 , wherein the AC/DC conversion circuit further comprises:
a step-down converter coupled between the rectification unit and the supply node.

7. The power supply device sharing power of a doorbell of claim 1 , further comprising:
a power management unit coupled between the AC/DC conversion circuit and the supply node and configured to transmit the DC power and to limit amperage of the DC power.

8. The power supply device sharing power of a doorbell of claim 7 , wherein the power management unit comprises:
a current limiter coupled between the AC/DC conversion circuit and the supply node.

9. The power supply device sharing power of a doorbell of claim 1 , further comprising:
an energy storage unit coupled between the AC/DC conversion circuit and the supply node, wherein the energy storage unit is charged according to the DC power when the AC switch is off, and wherein the energy storage unit is discharged to provide the DC power when the AC switch is on.

10. The power supply device sharing power of a doorbell of claim 9 , further comprising:
a power management unit coupled between the AC/DC conversion circuit, the energy storage unit, and the supply node and configured to transmit the DC power, to limit amperage of the DC power, and to charge the energy storage unit by the DC power when the AC switch is off.

11. The power supply device sharing power of a doorbell of claim 10 , wherein the power management unit comprises:
a current limiter coupled between the AC/DC conversion circuit and the supply node.

12. An electronic system sharing power of a doorbell, comprising:
a power supply device comprising:
two power contacts configured to be respectively connected to two doorbell switch contacts;
an AC switch coupled between the two power contacts and configured to be on according to a control signal, wherein the AC switch is normally off;
a supply node configured to output DC power;
an AC/DC conversion circuit connected in parallel between the two power contacts along with the AC switch, coupled between the two power contacts and the supply node, input ends of the AC/DC conversion circuit are coupled to the two power contacts and to two ends of the AC switch, output end of the AC/DC conversion circuit is coupled to the supply node, and configured to when the AC switch is off, receive AC power via the two power contacts and to generate the DC power according to the AC power;
an enabling node;
a doorbell actuator coupled between the output end of the AC/DC conversion circuit and the enabling node and configured to generate an enabling signal and output the enabling signal via the enabling node; and
a control node coupled to control end of the AC switch and configured to receive the control signal, wherein the control signal is relative to the enabling signal;
at least one functional circuit; and
a control unit coupled to the supply node, the enabling node, and the control node of the power supply device and the at least one functional circuit and configured to control operation of the at least one functional circuit and to generate the control signal according to the enabling signal, wherein the control unit and the at least one functional circuit are supplied by the DC power.

13. The electronic system sharing power of a doorbell of claim 12 , wherein the power supply device further comprises:
an energy storage unit coupled to the supply node, wherein the energy storage unit is charged according to the DC power when the AC switch is off, and wherein the energy storage unit is discharged to provide the DC power when the AC switch is on.

14. A power supply method sharing power of a doorbell, comprising:
receiving, by an AC/DC conversion circuit, AC power from two doorbell switch contacts of the doorbell, wherein input ends of the AC/DC conversion circuit are coupled to the AC power, and an AC switch is coupled to and between the input ends of the AC/DC conversion circuit;
outputting, by the AC/DC conversion circuit, DC power to supply at least one functional circuit according to the AC power;
generating, by a doorbell actuator, an enabling signal based on the DC power when the doorbell actuator is actuated;
generating and outputting a control signal to the AC switch according to the enabling signal; and
connecting the two doorbell switch contacts to each other through switching the AC switch to be on in response to the control signal to drive the doorbell by the AC power.

15. The power supply method sharing power of a doorbell of claim 14 , further comprising:
charging an energy storage unit according to the DC power; and
supplying the at least one functional circuit by the energy storage unit when the two doorbell switch contacts are connected.

16. The power supply method sharing power of a doorbell of claim 14 , wherein the step of outputting DC power to supply at least one functional circuit according to the received AC power comprises:
converting the AC power into the DC power by a rectification unit.

17. The power supply method sharing power of a doorbell of claim 16 , wherein the step of outputting DC power to supply at least one functional circuit according to the received AC power further comprises:
stepping down voltage level of the DC power by a step-down converter; and
supplying the at least o

Assignees

• Chicony Electronics Co Ltd

Inventors

• Wei Chia-Liang
• Hsu Hsiao-Ching

Classifications

• G08B3/10 Primary

  using electric transmission; using electromagnetic transmission · CPC title

• H02M5/257

  using semiconductor devices only · CPC title

• H02M2001/0006

  Electricity · mapped topic

• H02M1/0006

  Arrangements for supplying an adequate voltage to the control circuit of converters · CPC title

• H02J2207/20

  Charging or discharging characterised by the power electronics converter · CPC title