Lighting device with connector for add on electrical device

• US 10,465,897 B2
• Filed: 10/04/2016
• Issued: 11/05/2019
• Est. Priority Date: 10/26/2015
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Signify Holding B.V. (Signify N.V.)
• Inventors: Marinus, Antonius Adrianus Maria, Gielen, Vincent Stefan David
• Primary Examiner(s): Ton, Anabel
• Application Number:
  US15/770,286
• Publication Number:
  US 20180313526A1
• Time in Patent Office: 1,127 Days
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21K 9/61 using light guides
• CPC Class Codes: F21V 23/0435 activated by remote control means
• CPC Class Codes: F21V 23/0442 activated by means of a sensor, e.g. motion or photodetectors
• CPC Class Codes: F21V 23/045 the sensor receiving a signal from a remote controller
• CPC Class Codes: F21V 23/06 the elements being coupling devices , e.g. connectors
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21Y 2101/00 Point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 6/0021 for housing at least a part of the light source, e.g. by forming holes or recesses

Abstract

A lighting device (100, 600) comprises a first portion (110, 610), a solid state light source (120, 620), a second portion (130, 630), a metal heat sink (140, 640-641) and a connector (150). The first portion is arranged for electrically connecting the lighting device. The second portion is mounted on the first portion and has an outer surface, wherein at least a portion (131, 631) of the outer surface is light transmissive for outputting light originating from the solid state light source. The metal heat sink extends along the outer surface, and is arranged in thermal contact with the solid state light source. The connector is arranged at the metal heat sink for connecting an electrical device (160, 660). A distance (D1, D3, D4) from the first portion to the connector is longer than a distance (D5) from the first portion to at least one light transmissive portion (131, 631) of the outer surface.

Claims

1. A lighting device comprising:

a solid state light source;

a first portion adapted to receive a direct or alternating current power source;

a second portion mounted on the first portion, the second portion having an outer surface, wherein at least a portion of the outer surface of the second portion is light transmissive for outputting light originating from the solid state light source;

a metal heat sink extending at least partly along the outer surface of the second portion, the metal heat sink arranged to be in thermal contact with the solid state light source; and

a connector arranged at a position on the metal heat sink for connecting an electrical device from outside of the lighting device, the position on the metal heat sink being on a part of the metal heat sink that extends along the outer surface of the second portion;

wherein a distance from the first portion to the connector is longer than a distance from the first portion to at least one light transmissive portion of the outer surface of the second portion.

2. The lighting device of claim 1, wherein the outer surface of the second portion comprises a strip and at least one main portion, the metal heat sink extending along the strip of the outer surface of the second portion, and the at least one main portion is light transmissive.

3. The lighting device of claim 1, wherein the connector is arranged at an end of the second portion located opposite to an end of the second portion at which the second portion is mounted on the first portion.

4. The lighting device of claim 1, further comprising the electrical device connected to the connector.

5. The lighting device of claim 1, wherein the electrical device comprises a sensor.

6. The lighting device of claim 1, wherein the second portion of the lighting device comprises a light guide and the metal heat sink comprises a metal strip extending at least partly around the light guide along a surface of the light guide, the metal strip being arranged in thermal contact with the surface of the light guide, wherein the solid state light source is arranged to emit light into the light guide, and wherein the connector is arranged at a position on the metal strip.

7. The lighting device of claim 6, wherein the light guide extends at least four times more in a direction along a plane in which the light guide extends than along a normal to the plane.

8. The lighting device of claim 6, wherein the solid state light source is arranged between the light guide and the metal strip.

9. The lighting device of claim 1, wherein the second portion is a bulb, and wherein the solid state light source is arranged inside the bulb.

10. The lighting device of claim 9, wherein the metal heat sink extends from inside the bulb to the outer surface of the second portion.

11. The lighting device of claim 9, further comprising a cluster of solid state light sources which is distributed in subgroups of solid state light sources by the metal heat sink.

12. The lighting device of claim 1, wherein the portion of the outer surface of the second portion that is light transmissive is arranged in direct contact with the first portion.

13. The lighting device of claim 1, wherein the first portion comprises a cap for mounting the lighting device in a socket or a USB contact, the socket being one of a E14, E27, B22d, Ba15d, G4, GU10 socket.

14. The lighting device of claim 1, wherein the first portion comprises protruding side walls for preventing light from the solid state light source from escaping the lighting device before reaching the second portion.

15. The lighting device of claim 1, wherein the solid state light source is arranged at a base of the second portion at which the second portion is mounted on the first portion.

16. The lighting device of claim 5, wherein the sensor comprises a microphone, camera, presence detector, smoke detector, or an air quality sensor.

17. The lighting device of claim 1, wherein the connector allows for the electrical device to be removably attached.

18. The lighting device of claim 1, further comprising an electrical connection between the first portion and an electrical interface of the connector.

19. The lighting device of claim 18, wherein the electrical connection includes a connection to provide power to the electrical device from the first portion.

20. The lighting device of claim 18, wherein the first portion includes a control unit to control the solid state light source based on input from the electrical device.