EP-4738996-A1 - POWER CARRIER CIRCUIT AND LIGHTING DEVICE

EP4738996A1EP 4738996 A1EP4738996 A1EP 4738996A1EP-4738996-A1

Abstract

The present application relates to the technical field of circuits. Provided are a power carrier circuit and a lighting device. A carrier modulates a carrier signal into an alternating current of a first power source line, so as to obtain an alternating-current carrier control signal; a rectifier converts into a direct current the alternating-current carrier control signal transmitted by the first power source line, so as to obtain a first direct-current signal; a first coupler is used for filtering out a direct-current signal and a low-frequency signal in the alternating-current carrier control signal, and retaining a high-frequency signal in the alternating-current carrier control signal, so as to obtain a target carrier signal, wherein the target carrier signal and the first direct-current signal are modulated in a second power source line, so as to obtain a direct-current power source carrier signal; a second coupler is used for performing coupling on the direct-current power source carrier signal to obtain the target carrier signal, and transmitting the target carrier signal to a lighting module; and the lighting module draws power by means of the direct-current power source carrier signal and operates according to the target carrier signal. Four-wire transmission is not required, and thus the use of wires can be effectively reduced.

Inventors

GAO, Chun
ZHU, Guangchuan

Assignees

Suzhou Opple Lighting Co., Ltd.
Opple Lighting Co., Ltd.

Dates

Publication Date: 20260506
Application Date: 20240612

Claims (10)

A power carrier circuit, comprising: a carrier, an output end of the carrier being connected to a first power line, and the carrier being configured to modulate a carrier signal into an alternating current of the first power line to obtain an alternating-current carrier control signal; a rectifier, an input end of the rectifier being connected to the first power line, and the rectifier being configured to convert the alternating-current carrier control signal transmitted by the first power line into direct current to obtain a first direct-current signal; a first coupler, a first port of the first coupler being connected to the first power line, the first coupler being configured to filter out a direct-current signal and a low-frequency signal in the alternating-current carrier control signal, and retain a high-frequency signal in the alternating-current carrier control signal to obtain a target carrier signal; the target carrier signal and the first direct-current signal being modulated in a second power line to obtain a direct-current power carrier signal; and N decoding lighting units, each decoding lighting unit comprising a second coupler and a lighting module which are communicatively connected, N being a positive integer; an output end of the rectifier and a second port of the first coupler being connected to the second coupler and the lighting module in the each decoding lighting unit through the second power line; wherein the second coupler is configured to couple the target carrier signal from the direct-current power carrier signal and transmit the target carrier signal to the lighting module, and the lighting module is configured to extract power based on the direct-current power carrier signal and operate according to the target carrier signal.
The power carrier circuit according to claim 1, further comprising: a power amplifier, wherein the power amplifier is connected to the second port of the first coupler and the second power line, respectively, and the power amplifier is configured to perform power amplification on the target carrier signal and then transmit the target carrier signal after the power amplification to the second power line.
The power carrier circuit according to claim 1 or 2, wherein the first power line comprises a neutral line and a live line; the second power line comprises a positive line and a negative line; and the first coupler comprises: a first capacitor, a second capacitor and a first transformer, wherein the first capacitor is connected to the live line and a first port of the first transformer, respectively, and the second capacitor is connected to the neutral line and a second port of the first transformer, respectively; the first capacitor and the second capacitor are configured to filter out the direct-current signal in the alternating-current carrier control signal to obtain a first carrier signal; and the first transformer is configured to filter out the low-frequency signal in the first carrier signal to obtain a second carrier signal; and a third capacitor, wherein the third capacitor is connected to a third port of the first transformer and the positive line, respectively, and a fourth port of the first transformer is connected to the negative line; and the third capacitor is configured to filter out the direct-current signal in the second carrier signal to obtain the target carrier signal and transmit the target carrier signal to the second power line.
The power carrier circuit according to claim 3, wherein the second coupler comprises: a fourth capacitor and a second transformer, wherein the fourth capacitor is connected to the positive line and a first port of the second transformer, respectively; a second port of the second transformer is connected to the negative line; a third port and a fourth port of the second transformer are connected to the lighting module; the fourth capacitor is configured to filter out the low-frequency signal in the direct-current power carrier signal; and the second transformer is configured to couple the target carrier signal from the direct-current power carrier signal and transmit the target carrier signal to the lighting module.
The power carrier circuit according to claim 4, further comprising: a decoder, wherein a first port of the decoder is connected to the third port and the fourth port of the second transformer; a second port of the decoder is communicatively connected to the lighting module; and the decoder is configured to decode the target carrier signal into a pulse width modulation signal and transmit the pulse width modulation signal to the lighting module.
The power carrier circuit according to claim 5, further comprising: a microcontroller, wherein the microcontroller is communicatively connected to the decoder and the lighting module, respectively, and the microcontroller is configured to control an operation of the lighting module through the pulse width modulation signal.
The power carrier circuit according to claim 1 or 2, further comprising: a filter, wherein the filter is connected to the output end of the rectifier and the second power line, respectively, and the filter is configured to filter out a high-frequency differential mode signal in the first direct-current signal.
The power carrier circuit according to claim 1 or 2, wherein the lighting module comprises: a dimming module and a light-emitting unit, wherein the dimming module is connected to the second power line and the second coupler, respectively, and the dimming module is configured to control a brightness of the light-emitting unit according to the target carrier signal.
The power carrier circuit according to claim 8, wherein the light-emitting unit comprises at least one of: a light-emitting diode, a laser diode, an organic light-emitting diode and other light-emitting units.
A lighting device, comprising the power carrier circuit according to any one of claims 1 to 9.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims the priority of Chinese patent application No. 2023108022205, entitled "Power Carrier Circuit and Lighting Device", filed on June 30, 2023, and Chinese patent application No. 2023217134563, entitled "Power Carrier Circuit and Lighting Device", filed on June 30, 2023. The entire contents of these applications are incorporated herein by reference. TECHNICAL FIELD The present disclosure relates to the field of circuit technology, and in particular to a power carrier circuit and a lighting device. BACKGROUND With the continuous development of technology, lighting devices have become indispensable in people's lives. In addition to simply controlling the on/off of lighting devices through switches, it is now also possible to control their brightness, timed on/off and other functions through specific signals. In the related art, the functions of power supply and signal transmission are realized through a four-wire system. The four-wire system includes four independent signal lines, namely a positive line, a negative line, a data line and a ground line. In the four-wire system, the positive line provides the positive voltage of the power supply or signal, the negative line provides the negative voltage of the power supply or signal, the data line is used to transmit specific audio, video or data signals, and the ground line is used to provide a common ground reference point to ensure the accuracy and stability of the signals. However, the four-wire system consumes more wires, and due to the excessive number of wires, the probability of failure is relatively higher. Therefore, how to better realize the control of lighting devices has become an urgent problem to be solved in the industry. SUMMARY The present disclosure provides a power carrier circuit and a lighting device to solve the defects in the prior art that the four-wire system consumes more wires and has a relatively higher probability of failure due to the excessive number of wires. The present disclosure provides a power carrier circuit, including: a carrier, an output end of the carrier being connected to a first power line, and the carrier being configured to modulate a carrier signal into an alternating current of the first power line to obtain an alternating-current carrier control signal;a rectifier, an input end of the rectifier being connected to the first power line, and the rectifier being configured to convert the alternating-current carrier control signal transmitted by the first power line into direct current to obtain a first direct-current signal;a first coupler, a first port of the first coupler being connected to the first power line, the first coupler being configured to filter out a direct-current signal and a low-frequency signal in the alternating-current carrier control signal, and retain a high-frequency signal in the alternating-current carrier control signal to obtain a target carrier signal; the target carrier signal and the first direct-current signal being modulated in a second power line to obtain a direct-current power carrier signal; andN decoding lighting units, each decoding lighting unit including a second coupler and a lighting module which are communicatively connected, N being a positive integer; an output end of the rectifier and a second port of the first coupler being connected to the second coupler and the lighting module in the each decoding lighting unit through the second power line; wherein the second coupler is configured to couple the target carrier signal from the direct-current power carrier signal and transmit the target carrier signal to the lighting module, and the lighting module is configured to extract power based on the direct-current power carrier signal and operate according to the target carrier signal. According to a power carrier circuit provided by the present disclosure, the circuit further includes: a power amplifier, wherein the power amplifier is connected to the second port of the first coupler and the second power line, respectively, and the power amplifier is configured to perform power amplification on the target carrier signal and then transmit the target carrier signal after the power amplification to the second power line. According to a power carrier circuit provided by the present disclosure, the first power line includes a neutral line and a live line; the second power line includes a positive line and a negative line; and the first coupler includes: a first capacitor, a second capacitor and a first transformer, wherein the first capacitor is connected to the live line and a first port of the first transformer, respectively, and the second capacitor is connected to the neutral line and a second port of the first transformer, respectively; the first capacitor and the second capacitor are configured to filter out the direct-current signal in the alternating-current carrier control signal to obtain a first carrier signal; t