US 11,895,745 B2Granted

Remote power delivery for distributed lighting with integrated data transmission

AssigneeViza Electronics Pte. Ltd.

InventorsJack Lula, Robert Zamora

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Abstract

A power supply may provide a constant source of DC power through a first inductor-capacitor network, across a two-line conductor, and through a second inductor-capacitor network to a remote load. A modulator at the supply may modulate a carrier frequency with an information signal containing control data and may pass a modulated signal to the load via the conductor with the DC power. At the load, a demodulator may extract the control data, and operation of the load, such as a bank of LEDs subjected to dimming, may be modified based on the control data. The inductor-capacitor networks enable decoupling of the DC power and data for simple and low-cost implementations at comparatively low frequencies. In examples, the carrier frequency is at least 10 times the rate of the information signal yet below typical communication frequencies such as 525 KHz.

Claims20

Dependent claims

A system, comprising:

a source for delivering DC power integrated with control data for operating a light emitting diode (LED) within an endpoint, comprising:
a power supply with a source low-pass filter coupled to a supply output and configured to provide the DC power to the supply output;
a source microcontroller configured to receive an external input relating to the control data and to output at a data frequency a first information signal comprising the control data;
and
a source modulator coupled to the source microcontroller and configured to generate a first modulation signal, the first modulation signal comprising a first carrier frequency modulated with the first information signal, wherein the first carrier frequency is greater than the data frequency, the source modulator being configured to pass the first modulation signal through a source high-pass filter to the supply output;
a cable configured to communicate the DC power and the first modulation signal from the source and to the endpoint;
and
the endpoint positioned remotely from the source for receiving the DC power and the first modulation signal from the cable, comprising:
an endpoint input coupled to the conductor to receive the DC power;
the LED with an endpoint low-pass filter coupled to the endpoint input, the low-pass filter configured to separate the DC power from the first modulation signal to provide the DC power to the LED;
an endpoint demodulator with an endpoint high-pass filter coupled to the endpoint input and configured to demodulate the first modulation signal received within the DC power;
and
an endpoint microcontroller configured to receive the control data from the endpoint demodulator and to output signals for controlling operation of the LED based at least in part on the control data.

10 more elements

A method for delivering DC power integrated with control data to an endpoint at a remote location, comprising:

providing DC power, for a light emitting diode (LED) at the endpoint, from a supply output of a power supply, the power supply having a source low-pass filter coupled to the supply output;
receiving, by a microcontroller, an external input relating to the control data, the control data comprising an operational setting for the LED;
outputting, by the microcontroller, a first information signal at a data frequency, the first information signal comprising the control data with the operational setting for the LED;
generating, by a modulator, a first modulation signal comprising a first carrier modulated with the first information signal, wherein the first carrier frequency exceeds the data frequency;
passing, by the modulator, the first modulation signal through a high-pass filter to the supply output;
and
transmitting the first modulation signal and the DC power through a cable to the endpoint.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/110,059Filed 2 Dec 2020 · us provisional application
Priority: 2 Dec 2019
Published: US 2021/0168913 A13 Jun 2021
Granted: 6 Feb 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H05B 45/14
Controlling the intensity of the light: using electrical feedback from LEDs or from LED modules
H05B 45/30
Circuit arrangements for operating light-emitting diodes [LED]: driver circuits
H05B 45/40
Circuit arrangements for operating light-emitting diodes [LED]: details of LED load circuits
H05B 47/19
By remote control: via wireless transmission