Lamp with inductive connection to light engine

• US 10,473,273 B1
• Filed: 06/15/2018
• Issued: 11/12/2019
• Est. Priority Date: 06/15/2018
• Status: Active Grant

• Current Assignee: LEDVANCE LLC (MLS Co. Ltd.)
• Original Assignee: LEDVANCE LLC (MLS Co. Ltd.)
• Inventors: Zolotykh, Valeriy, Hegde, Ravidasa, Pierotti, Alberto
• Primary Examiner(s): Chan, Wei (Victor)
• Application Number:
  US16/009,886
• Time in Patent Office: 515 Days
• Field of Search: 315 70, 315312, 31511121, 31511131, 315210
• 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 9/238 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21K 9/90 Methods of manufacture
• CPC Class Codes: F21V 23/006 the substrate being distinct from the light source holder
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H05B 45/382 with galvanic isolation between input and output
• CPC Class Codes: H05B 45/39 Circuits containing inverter bridges

Abstract

A lamp is provided that includes a housing including a light projecting end and a base having an electrical connector for connection with a lamp fixture; and a light engine including light emitting diodes (LEDs) that is positioned at the light projecting end of the housing. A driver assembly may be in electrical communication with the electrical connector of the base of the housing. In some embodiments, an inductive connection is positioned between the driver assembly and the light engine. The inductive connection may include a transmission coil in the driver assembly, and a receiver coil in the light engine that provides for the transfer of energy magnetically from the driver assembly to the light engine.

Claims

1. A lamp comprising:

a housing including a light projecting end and a base having an electrical connector for connection with a lamp fixture;

a light engine positioned at the light projecting end of the housing;

a driver assembly in electrical communication with the electrical connector of the base of the housing; and

an inductive connection positioned between the driver assembly and the light engine, the inductive connection comprises a transmission coil in the driver assembly, and a receiver coil in the light engine that provides for the transfer of energy magnetically from the driver assembly to the light engine, and the driver assembly comprises a printed circuit board including an electromagnetic interference (EMI) rectifier, a power factor correction (PFC) regulator, and a resonant converter stage, wherein the electromagnetic interference (EMI) rectifier is in physical electrical connection with an electrical connector of the base, and the resonant converter stage is in physical electrical connection with the inductive transmission coil (Tx) of the inductive connection;

wherein the light engine includes a light engine printed circuit board (PCB), the light engine PCB includes a network matching in physical electrical connection with the inductive receiver coil (Rx), a rectifier and filter portion that converts the AC voltage from the inductive receiver coil to DC voltage, an output regulator that regulates the DC voltage to an amount for an LED load for use by the light engine, and an LED load portion in physical electrical connection with the light engine.

2. The lamp of claim 1, wherein the light engine includes a light emitting diode (LED).

3. The lamp of claim 2, wherein the light emitting diode (LED) that is present in the light engine is a plurality of light emitting diodes (LEDs) in at least one light emitting diode (LED) filament structure.

4. The lamp of claim 1, wherein the transfer of energy from the transmission coil to the receiver coil is wireless.

5. The lamp of claim 2, wherein transmission coil is physically separated from the receiver coil and there is no physical electrical connection between the transmission coil and the receiver coil.

6. The lamp of claim 1, wherein the transmission coil comprises at least one first wire coil and the receiver coil comprises at least one second wire coil.

7. The lamp of claim 1, wherein the driver assembly accepts a 120 V input or a 230 V input.

8. The lamp of claim 1, wherein the driver assembly includes a resonant converter that generates AC voltage for the inductive transmission coil having a frequency greater than 110 KHz.

9. The lamp of claim 1, wherein the output regulator that regulates the DC voltage to the amount for the LED load provides a DC voltage ranging from 5 V to 300 V.

10. A lamp comprising:

a housing including a light projecting end and a base having an electrical connector for connection with a lamp fixture;

a light engine positioned at the light projecting end of the housing;

a driver assembly in electrical communication with the electrical connector of the base of the housing; and

an inductive connection including at least one graphene based inductor positioned between the driver assembly and the light engine, the at least one graphene based inductor including a transmission coil in the driver assembly, and a receiver coil in the light engine that provides for the transfer of energy magnetically from the driver assembly to the light engine, and the driver assembly comprises a printed circuit board including an electromagnetic interference (EMI) rectifier, a power factor correction (PFC) regulator, and a resonant converter stage, wherein the electromagnetic interference (EMI) rectifier is in physical electrical connection with an electrical connector of the base, and the resonant converter stage is in physical electrical connection with the transmission coil of the inductive connection of the at least one graphene based inductor;

wherein the light engine includes a light engine printed circuit board (PCB), the light engine PCB includes a network matching in physical electrical connection with the inductive receiver coil (Rx), a rectifier and filter portion that converts the AC voltage from the inductive receiver coil to DC voltage, an output regulator that regulates the DC voltage to an amount for an LED load for use by the light engine, and an LED load portion in physical electrical connection with the light engine.

11. The lamp of claim 10, wherein the light engine includes a light emitting diode (LED).

12. The lamp of claim 11, wherein the light emitting diode (LED) that is present in the light engine is a plurality of light emitting diodes (LEDs) in at least one light emitting diode (LED) filament structure.

13. The lamp of claim 11, wherein the graphene inductor comprises a bromine-intercalated graphene spiral.