Linear lighting device

Patent metadata

Field	Value
Publication number	US-11570874-B2
Application number	US-202117390731-A
Country	US
Kind code	B2
Filing date	Jul 30, 2021
Priority date	Jul 31, 2020
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

A linear lighting device may include an elongated housing that defines a cavity. The linear lighting device may include plurality of emitter printed circuit boards configured to be received within the cavity. Each of the plurality of emitter printed circuit boards may include a plurality of emitter modules mounted thereto. Each of the plurality of emitter printed circuit boards may include a control circuit configured to control the plurality of emitter modules mounted to the respective emitter printed circuit board based on receipt of one or more messages. The linear lighting device may include a total internal reflection lens for each of the plurality of emitter printed circuit boards. The total internal reflection lens may be configured to diffuse light emitted by the emitter modules of the plurality of emitter printed circuit boards.

First claim

What is claimed is:

1. A lighting system comprising:
a linear lighting device comprising:
an elongated housing defining a cavity extending along a longitudinal axis of the housing;
a plurality of emitter printed circuit boards configured to be received within the cavity of the housing; and
a plurality of emitter modules mounted to each of the plurality of emitter printed circuit boards;
wherein each of the plurality of emitter printed circuit boards has an emitter control circuit mounted thereto, the emitter control circuit configured to control the plurality of emitter modules mounted to the respective emitter printed circuit board based on receipt of one or more first messages, and
wherein each of the plurality of emitter printed circuit boards has a drive circuit mounted thereto, the drive circuit configured to:
receive a DC bus voltage for powering the plurality of emitter printed circuit boards; and
conduct drive currents through the plurality of emitter modules mounted to the respective emitter printed circuit board; and

a power supply configured to provide the DC bus voltage to the linear lighting device, the power supply comprising:
a wireless communication circuit configured to transmit and receive second messages; and
a serial communication circuit configured to communicate the one or more first messages with the linear lighting device via a communication bus.

2. The lighting system of claim 1 , wherein the lighting system comprises a plurality of linear lighting devices, and wherein the power supply is configured to provide the DC bus voltage to the plurality of lighting devices.

3. The lighting system of claim 2 , wherein the serial communication circuit is configured to communicate the one or more messages with the plurality of linear lighting devices via the communication bus.

4. The lighting system of claim 1 , wherein the drive circuit is configured to receive the DC bus voltage on a DC power bus.

5. The lighting system of claim 2 , wherein the linear lighting device comprises a master lighting module and a plurality of drone lighting modules, the master lighting module comprising a master control circuit configured to control the emitter control circuit of each of the plurality of emitter printed circuit boards, the master control circuit configured to:
transmit a first control message to a first emitter control circuit of the plurality of emitter control circuits;
measure, after sending the first control message, a first voltage on a communication line;
transmit a second control message to a second emitter control circuit of the plurality of emitter control circuits;
measure, after sending the second control message, a second voltage on the communication line;
determine an order of the plurality of drone lighting modules that are communicatively coupled to the master lighting module based on the first voltage and the second voltage.

6. The lighting system of claim 5 , wherein the communication line is an interrupt request (IRQ) line.

7. The lighting system of claim 5 , wherein the first control message indicates a first command instructing the first emitter control circuit to pull an output port connected to the communication line low.

8. The lighting system of claim 5 , wherein the second control message indicates a second command instructing the second emitter control circuit to pull an output port connected to the communication line low.

9. The lighting system of claim 5 , wherein the master control circuit is further configured to determine whether a voltage has been measured on the communication line for each of the plurality of emitter control circuits.

10. The lighting system of claim 9 , wherein the master control circuit determines the order of the plurality of drone lighting modules when the communication line voltage has been measured for each of the plurality of emitter control circuits.

11. The lighting system of claim 5 , wherein the order of the plurality of drone lighting modules is determined in ascending order of measured voltage.

12. The lighting system of claim 1 , wherein the power supply is configured to:
assign a unique address to each of a plurality of master lighting modules that are communicatively coupled to the power supply via the communication bus;
send a first command to a first master lighting module of the plurality of master lighting modules, the first command configured to control the first master lighting module to output a first current on the communication bus;
close a switch on the communication bus;
open, a predetermined period after the switch was closed, the switch on the communication bus;
receive a first plurality of measured voltages from the plurality of master lighting modules, wherein the first plurality of measured voltages were measured on the communication bus while the first master lighting module output the first current;
determine an order of the plurality of master lighting modules based on the plurality of measured voltages.

13. The lighting system of claim 12 , wherein the power supply is further configured to:
send a second command to a second master lighting module of the plurality of master lighting modules, the second command configured to control the first master lighting module to output a second current on the communication bus;
close the switch on the communication bus;
open, a predetermined period after the switch was closed, the switch on the communication bus;
receive a second plurality of measured voltages from the plurality of master lighting modules, wherein the second plurality of measured voltages were measured on the communication bus while the second master lighting module output the second current,
wherein the order is determined based on the first plurality of measured voltages and the second plurality of measured voltages.

14. The lighting system of claim 12 , wherein the order is determined using a trend of the first plurality of measured voltages.

15. The lighting system of claim 14 , wherein the trend comprises a descending order of voltage magnitudes.

16. The lighting system of claim 12 , wherein the order is determined by pairing each of the plurality of measured voltages with a respective unique address.

17. The lighting system of claim 1 , further comprising a total internal reflection lens for each of the plurality of emitter printed circuit boards, wherein the total internal reflection lens is configured to diffuse light emitted by the emitter modules of the plurality of emitter printed circuit boards.

18. The lighting system of claim 1 , wherein a first emitter printed circuit board of the plurality of emitter printed circuit boards has a length of 3 inches and a second emitter printed circuit board of the plurality of emitter printed circuit boards has a length of 4 inches.

19. The lighting system of claim 1 , wherein each of the plurality of emitter printed circuit boards has a length of 3 inches or 4 inches such that the overall length of the linear lighting device is configurable.

20. The lighting system of claim 1 , wherein a first emitter printed circuit board of the plurality of emitter printed circuit boards receives the messages from power supply, and wherein the first emitter printed circuit board relays the messages to a second emitter printed circuit board of the plurality of emitter printed circuit boards.

21. The lighting system of claim 1 , wherein each of the plurality of emitter modules comprises a plurality of emitters and a plurality of det

Assignees

• Lutron Tech Co Llc

Inventors

• Bocock Ryan M
• Dong Fangxu
• Fox Ari L
• Green Christopher M
• Ogden Jr Peter W
• Phillips Stephen
• Redus Jonathan R
• Shukla Jaykrishna A

Classifications

• F21S4/28 Primary

  rigid, e.g. LED bars · CPC title

• F21V7/0091

  using total internal reflection · CPC title

• F21V23/06

  the elements being coupling devices {, e.g. connectors} · CPC title

• F21V7/04

  Optical design · CPC title

• H05B47/18 Primary

  via data-bus transmission · CPC title