Solid-state lighting device having a wireless communication antenna

• US 10,355,340 B2
• Filed: 05/25/2017
• Issued: 07/16/2019
• Est. Priority Date: 06/07/2016
• Status: Expired due to Fees

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Signify Holding B.V. (Signify N.V.)
• Inventors: Marinus, Antonius Adrianus Maria, Louh, Yacouba, Ding, Jin
• Primary Examiner(s): Levi, Dameon E
• Assistant Examiner(s): Alkassim, Jr., Ab Salam
• Application Number:
  US15/605,382
• Publication Number:
  US 20170352942A1
• Time in Patent Office: 782 Days
• Field of Search: 343721
• 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 23/045 the sensor receiving a signal from a remote controller
• CPC Class Codes: F21V 29/713 in direct thermal and mechanical contact of each other to form a single system
• 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
• CPC Class Codes: G02B 6/0036 2-D arrangement of prisms, protrusions, indentations or roughened surfaces
• CPC Class Codes: G02B 6/0083 Details of electrical connections of light sources to drivers, circuit boards, or the like
• CPC Class Codes: G02B 6/0085 Means for removing heat created by the light source from the package heat extraction or cooling elements for semiconductor light sources in general H01L33/64
• CPC Class Codes: H01Q 1/24 with receiving set
• CPC Class Codes: H04B 1/38 Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
• CPC Class Codes: H05B 47/19 via wireless transmission

Abstract

A lighting device is disclosed. The lighting device comprises: a solid-state lighting element; a radio frequency communication unit for wireless communication between the lighting device and an external device; a light guide having a circumferential edge, wherein the light guide is adapted to couple in light emitted by the solid-state lighting element and to provide illumination to the surroundings of the lighting device; and a metal strip extending along at least a portion of the circumferential edge of the light guide, wherein the metal strip is in thermal contact with the solid-state lighting element and the light guide, and wherein the metal strip is coupled to the radio frequency communication unit so as to operate as an antenna for the radio frequency communication unit.

Claims

1. A lighting device comprising:

a solid-state lighting element;

a radio frequency communication unit for wireless communication between the lighting device and an external device;

a light guide having a circumferential edge, wherein the light guide is adapted to couple in light emitted by the solid-state lighting element and to provide illumination to the surroundings of the lighting device, the solid-state lighting element being positioned in a depression of the circumferential edge; and

a metal strip extending along at least a portion of the circumferential edge of the light guide, wherein the metal strip is in thermal contact with the solid-state lighting element and the light guide, and wherein the metal strip is coupled to the radio frequency communication unit so as to operate as an antenna for the radio frequency communication unit, the metal strip having two ends arranged on either side of the depression of the circumferential edge forming a gap level with the solid-state lighting element.

2. The lighting device according to claim 1, wherein the radio frequency communication unit is a transceiver.

3. The lighting device according to claim 1, wherein the metal strip is adapted to operate as an antenna for radiofrequency signals in the range from 2.4 Ghz to 2.5 Ghz.

4. The lighting device according to claim 1, wherein a side of the metal strip facing the light guide is reflective.

5. The lighting device according to claim 1, wherein the metal strip is perforated.

6. The lighting device according to claim 1, wherein the light guide has two oppositely arranged planar outer surfaces, the circumferential edge joining the respective circumferences of the two planar outer surfaces.

7. The lighting device according to claim 1, wherein the light guide is adapted to diffuse light emitted from the light guide.

8. The lighting device according to claim 1, further comprising a first electrically isolating plate arranged between the solid-state lighting element and the metal strip so as to electrically isolate the solid-state lighting element from the metal strip.

9. The lighting device according to claim 8, further comprising a base for mechanically and electrically connecting the lighting device.

10. The lighting device according to claim 9, further comprising a second electrically isolating plate arranged between the base and the metal strip so as to electrically isolate the base from the metal strip.

11. The lighting device according to claim 9, wherein the radio frequency communication unit is arranged inside the base.

12. The lighting device according to claim 9, further comprising a driver for powering the solid-state lighting element, wherein the driver is arranged inside the base.

13. The lighting device according to claim 1, further comprising an additional communication unit for wired communication between the lighting device and an external device.

14. The lighting device according to claim 1, wherein the solid-state lighting element comprises at least one light-emitting diode mounted on a circuit board, and wherein the metal strip is integrated with the circuit board.