LIGHTING DEVICE WITH CONNECTOR FOR ADD ON ELECTRICAL DEVICE

• US 20180313526A1
• Filed: 10/04/2016
• Published: 11/01/2018
• Est. Priority Date: 10/26/2015
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Philips Lighting Holding BV (Signify N.V.)
• Inventors: MARINUS, Antonius Adrianus Maria, GIELEN, Vincent Stefan David
• Granted Patent: US 10,465,897 B2
• Time in Patent Office: 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 first portion for electrically connecting the lighting device;

a solid state light source;

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

a metal heat sink extending along the outer surface, wherein the metal heat sink is arranged in thermal contact with the solid state light source; and

a connector arranged at the metal heat sink for connecting an electrical device,

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 said outer surface, and

wherein the second portion of the lighting device comprises a body and the metal heat sink comprises a metal strip extending along an outer surface of the body, and wherein the first portion includes an electrical interface, the lighting device further comprising an electrical connection 44 between the electrical interface of the first portion and an electrical interface of the connector, the electrical connection being arranged at least partly between the metal strip and the body.

2. The lighting device of claim 1, wherein the metal heat sink extends along a strip of the outer surface, and wherein portions of the outer surface on both sides of the strip are 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 an electrical device mounted, via the connector, at the metal heat sink.

5. The lighting device of claim 1, wherein the electrical device comprises a sensor and an output device for providing an output signal to surroundings of the lighting device.

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 said 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 the metal strip.

7. The lighting device of claim 6, wherein the light guide has at least two main surfaces and an edge joining said two main surfaces, and wherein the metal strip extends along said edge.

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

9. The lighting device claim 6, wherein the metal strip extends at least two-third of a full revolution around the light guide, or wherein the lighting device comprises at least two metal strips together extending at least two-third of a full revolution around the light guide.

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

11. 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.

12. The lighting device of claim 11, wherein the metal heat sink extends from inside the bulb into the outer surface of the bulb.

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

14. The lighting device of claim 1, further comprising a conversion unit for converting signals between a signal format employed by the electrical device and a signal format transmittable over a power line to which the first portion is connectable.