Wireless controllable lighting device

Patent metadata

Field	Value
Publication number	US-12104776-B2
Application number	US-202318228871-A
Country	US
Kind code	B2
Filing date	Aug 1, 2023
Priority date	Apr 3, 2019
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

A lighting device (e.g., a controllable light-emitting diode illumination device) may have a light-generation module that may be assembled and calibrated prior to the light-generation module being installed in a finished good. The light-generation module may include an emitter module having at least one emitter mounted to a substrate and configured to emit light. The light-generation module may include a first printed circuit board on which the emitter module may be mounted and a second printed circuit board on which those circuits that are essential for powering the emitter module may be mounted. The light-generation module may include a heat sink located between the first printed circuit board and the second printed circuit board. The emitter module may be thermally-coupled to the heat sink through the substrate and the first printed circuit board.

First claim

What is claimed is:

1. A lighting device comprising:
a light-generation module comprising:
an emitter mounted to a substrate and configured to emit light;
a first printed circuit board to which the substrate is mounted;
a second printed circuit board comprising a drive circuit for the emitter, a control circuit for controlling the drive circuit, and a wireless communication circuit configured to communicate wireless control signals;
an antenna that extends from the second printed circuit board, the antenna electrically coupled to the wireless communication circuit on the second printed circuit board; and
a heat sink located between the first printed circuit board and the second printed circuit board, the emitter thermally-coupled to the heat sink through the substrate and the first printed circuit board;

a lens through which the light from the emitter is conducted; and
a reflector configured to reflect light emitted by the emitter towards the lens,
wherein the lens, the reflector, and the first printed circuit board of the light-generation module define an optical cavity, and wherein the antenna extends through the heat sink into the optical cavity.

2. The lighting device of claim 1 , wherein the antenna extends through a tunnel in the heat sink and an opening in the first printed circuit board.

3. The lighting device of claim 2 , wherein the light-generation module comprises an insulator configured to be received in a first recess in a rear surface of the heat sink, the insulator configured to electrically isolate the drive circuit, the control circuit, and the wireless communication circuit from the heat sink.

4. The lighting device of claim 3 , wherein the insulator comprises a second recess in which the second printed circuit board is located.

5. The lighting device of claim 4 , wherein the heat sink comprises a coupling portion configured to be capacitively coupled to a ground plane of the second printed circuit board when the second printed circuit board is located in the second recess of the insulator.

6. The lighting device of claim 5 , wherein the insulator comprises a void through which the coupling portion of the heat sink extends towards the second printed circuit board.

7. The lighting device of claim 6 , wherein the light-generation module further comprises an insulating material located between the coupling portion of the heat sink and the second printed circuit board.

8. The lighting device of claim 5 , wherein the heat sink operates as a counterpoise for the antenna.

9. The lighting device of claim 4 , wherein the first printed circuit board comprises a first connector configured to be connected to a second connector of the second printed circuit board for electrically coupling the drive circuit to the emitter.

10. The lighting device of claim 9 , wherein at least one of the first and second connectors extend through respective openings in the heat sink and the insulator.

11. The lighting device of claim 10 , wherein the insulator comprises an extension that defines a bore therethrough and is received in the tunnel, and wherein the antenna is received through the bore of the extension and the extension is configured to electrically isolate the antenna from the first printed circuit board.

12. The lighting device of claim 11 , further comprising:
a shield located over a top surface of the first printed circuit board in the optical cavity, the shield configured to be electrically coupled to the heat sink to reduce noise from the second printed circuit board from coupling to the reflector of the lighting device.

13. The lighting device of claim 12 , wherein a top side of the shield is electrically coupled to the heat sink, and a bottom side of the shield is not electrically conductive such that the first printed circuit board is electrically isolated from the shield.

14. The lighting device of claim 12 , wherein the antenna is a plated wire.

15. The lighting device of claim 12 , wherein the antenna comprises a bent portion so as to avoid contacting an inner surface of the lens of the lighting device.

16. The lighting device of claim 12 , wherein the antenna is straight and a distal portion of the antenna is configured to abut an inner surface of the lens.

17. The lighting device of claim 1 , wherein a bottom surface of the substrate comprises:
a plurality of electrical pads grouped together in sets of multiple pads, the electrical pads coupled to corresponding electrical pads on a top side of the first printed circuit board; and
one or more heat sink pads, the heat sink pads comprising a central pad and four corner pads located in respective corners of the substrate.

18. The lighting device of claim 17 , wherein at least one of the sets of electrical pads on the bottom surface of the substrate is surrounded by an electrostatic discharge trace that is connected to a ground plane of the first printed circuit board.

19. The lighting device of claim 1 , further comprising:
a housing defining a cavity in which light-generation module is located, the heat sink thermally coupled to the housing,
wherein the heat sink is configured to radiate heat generated by the emitter radially out through the sidewall to the housing.

Assignees

• Lutron Tech Co Llc

Inventors

• Bocock Ryan M
• Bollinger Jr Robert
• Camden Richard S
• Gascho Kevin L
• Newman Jr Robert C
• Ogden Jr Peter W

Classifications

• H05B47/19 Primary

  via wireless transmission · CPC title

• F21Y2113/13

  comprising an assembly of point-like light sources · CPC title

• H05K2201/10106

  Light emitting diode [LED] · CPC title

• H05K1/0204

  using means for thermal conduction connection in the thickness direction of the substrate (H05K1/0207 takes precedence) · CPC title

• F21V7/06

  with parabolic curvature · CPC title