Linear lighting device

Patent metadata

Field	Value
Publication number	US-11917739-B2
Application number	US-202218075618-A
Country	US
Kind code	B2
Filing date	Dec 6, 2022
Priority date	Jul 31, 2020
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

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 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 a control circuit mounted thereto, the 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, and
wherein at least one of the plurality of emitter printed circuit boards has a serial communication circuit mounted thereto, the serial communication circuit configured to communicate the one or more messages via a serial communication bus, 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 on a DC power bus 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.

2. The linear lighting device 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 emitters of the plurality of emitter printed circuit boards.

3. The linear lighting device of claim 2 , wherein a lower surface of the total internal reflection lens comprises a plurality of parallel ridges.

4. The linear lighting device of claim 3 , wherein the plurality of parallel ridges is perpendicular to a length of the housing along the longitudinal axis.

5. The linear lighting device 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.

6. The linear lighting device 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.

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

8. The linear lighting device of claim 1 , wherein the at least one emitter printed circuit board of the plurality of emitter printed circuit boards receives the one or more messages from a controller, and wherein the at least one emitter printed circuit board relays the messages to one or more other emitter printed circuit boards of the plurality of emitter printed circuit boards.

9. The linear lighting device of claim 8 , wherein the control circuit is an emitter control circuit, and wherein the at least one emitter printed circuit board has a master control circuit mounted thereto, the master control circuit coupled to the serial communication circuit and configured to communicate with the respective emitter control circuit mounted to the one or more other emitter printed circuit boards.

10. The linear lighting device of claim 1 , wherein each of the plurality of emitter modules comprises a plurality of emitters and a plurality of detectors mounted to a substrate and encapsulated by a dome.

11. The linear lighting device of claim 1 , wherein each of the plurality of emitter printed circuit boards has a socket mounted thereto, the socket configured to connect adjacent emitter printed circuit boards of the plurality of emitter printed circuit boards.

12. The linear lighting device of claim 11 , further comprising a cable that is configured to connect a first emitter printed circuit board of the plurality of emitter printed circuit boards to a second emitter printed circuit board of the plurality of emitter printed circuit boards via the socket.

13. The linear lighting device of claim 12 , wherein the cable is a flat flexible cable jumper.

14. The linear lighting device of claim 1 , wherein the plurality of emitter printed circuit boards are attached within the cavity defined by the housing using an adhesive.

15. The linear lighting device of claim 14 , wherein the adhesive is thermal tape.

16. The linear lighting device of claim 1 , further comprising a plurality of mounting brackets configured to attach the linear lighting device to a horizontal structure.

17. The linear lighting device of claim 1 , further comprising a cover lens.

18. The linear lighting device of claim 1 , further comprising:
an input end cap configured to cover a first end of the cavity of the housing; and
an output end cap configured to cover a second end of the cavity of the housing.

19. The linear lighting device of claim 1 , wherein the control circuit of each of the emitter printed circuit boards is an emitter control circuit, and wherein the linear lighting device comprises a master lighting module and a plurality of drone lighting modules, wherein each of the plurality of drone lighting modules has one of the emitter printed circuit boards having one of the emitter control circuits and one or more emitter modules mounted thereto, the master lighting module comprising one of the emitter printed circuit boards having a master control circuit, the serial communication circuit, one of the emitter control circuits, and one or more emitter modules mounted thereto, the master control circuit configured to control a plurality of emitter control circuits 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; and
determine an order of the drone lighting modules that are communicatively coupled to the master lighting module based on the first voltage and the second voltage.

20. The linear lighting device of claim 19 , wherein the communication line is an interrupt request (IRQ) line.

21. The linear lighting device of claim 19 , 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.

22. The linear lighting device of claim 19 , 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.

23. The linear lighting device of claim 19 , 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.

24. The linear lighting device of claim 23 , wherein the master control circuit determines the order of the drone lighting modules when the communication line voltage has been measured for each of the plurality of emitter control circuits.

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

• H05B47/19

  via wireless transmission · CPC title

• H05B47/199

  Commissioning of light sources · CPC title

• H05B47/18 Primary

  via data-bus transmission · CPC title

• F21V5/007

  Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane (combination of two or more refractors F21V5/008) · CPC title