DRIVER MODULE FOR POWERING A LIGHT SOURCE AND A FURTHER MODULE

• US 20180035517A1
• Filed: 02/12/2016
• Published: 02/01/2018
• Est. Priority Date: 02/26/2015
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Philips Lighting Holding BV (Signify N.V.)
• Inventors: DEN BOER, REINIER IMRE ANTON, GOIJAERTS, ADRIANUS MARIA, BOULIN, YVES SEBASTIEN, NAIR, BIJU KUMAR SREEDHARAN, GEERTMAN, ROBERT EUGENIO MARIE
• Granted Patent: US 10,448,487 B2
• Time in Patent Office: Days
• CPC Class Codes: F21S 8/086 with lighting device attached sideways of the standard, e.g. for roads and highways
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H05B 47/11 by determining the brightness or colour temperature of ambient light
• CPC Class Codes: H05B 47/19 via wireless transmission
• CPC Class Codes: H05B 47/22 with communication between the lamps and a central unit
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

The present invention relates to a driver module for use in a light fixture, especially an outdoor light fixture. The driver module is arranged for wirelessly powering a further module and for transmitting data from and/or to this further module. The further module can be a sensor module or a communications module. This allows for easy replacement of modules in light fixtures, late stage configuration of light fixtures and for upgradeability of light fixtures.

Claims

1. A light fixture comprising a light source, a driver module and a sensor module, the driver module comprising:

a driver arranged for powering the light source,

a driver module enclosure, at least partially encapsulating the driver, having at least one ingress protecting surface area and arranged for providing ingress protection for at least the driver,

a power input terminal, electrically coupled to the driver, arranged for receiving an input power from the light fixture,

a power output terminal, electrically coupled to the driver, arranged for providing a first output power to the light source through conductive power transfer,

a wireless power transmitter circuit 94,4 arranged for wirelessly transferring a second output power through a part of the ingress protecting surface area to the sensor module; and

an intra-module communications circuit, arranged for wirelessly transmitting data between the driver and the sensor module.

2. A light fixture according to claim 1, wherein the data transmitted between the driver and the sensor module is based on a determined sensor value;

and wherein the driver is further arranged for controlling the light source based on the data.

3. A light fixture according to claim 1, wherein the wireless power transmitter circuit is an inductive power transfer circuit, arranged for inductively transferring the second output power through the first surface area to the sensor module.

4. A light fixture according to claim 1, wherein the intra-module communications circuit is an inductive communications circuit, arranged for inductively transmitting data between the driver and the sensor module.

5. A light fixture according to claim 3, wherein the inductive power transfer circuit further arranged to function as the intra-module communications circuit.

6. A light fixture according to claim 1, wherein the intra-module communications circuit comprises a Near Field Communications tag.

7. A light fixture according to claim 1 wherein the light fixture further comprises a communications module, the communications module comprising:

a module-to-device communications circuit, arranged for communicating with a device external to the light fixture,

a communications module enclosure, at least partially encapsulating the module-to-device communications circuit, having at least one ingress protecting surface area and arranged for providing ingress protection for at least the module-to-device communications circuit,

a wireless power receiver circuit, electrically coupled to the module-to-device communications circuit, arranged for wirelessly receiving power from the driver module; and

an intra module communications circuit, arranged for wirelessly transmitting data between the communications module and the driver module.

8. A light fixture according to claim 7, wherein the communications module further comprises:

a sensor circuit, electrically coupled to the wireless power receiver circuit, the sensor circuit arranged for determining a sensed value; and

wherein the data wirelessly transmitted between the communications module and the driver module is based on the sensed value.

9. A light fixture according to claim 7, wherein the communications module further comprises:

a wireless power transmitter circuit arranged for wirelessly transmitting an output power through the surface area of the communications module enclosure to a sensor module; and

an intra-module communications circuit, arranged for transmitting data between the module-to-device communications circuit and the sensor module.

10. A light fixture according to claim 1, wherein the sensor module comprises:

a wireless power receiver circuit, electrically coupled to the sensor circuit, arranged for wirelessly receiving power from the driver module,

a sensor circuit, electrically coupled to the wireless power receiver circuit, the sensor circuit arranged for determining a sensed value,

a sensor module enclosure, at least partially encapsulating the sensor circuit, having at least one ingress protecting surface area and arranged for providing ingress protection for at least the wireless power receiver circuit when the sensor module is received by the light fixture; and

an intra module communications circuit, arranged for wirelessly transmitting data, based on the sensed value, between the sensor module and the driver module.

11. A light fixture according to claim 8, wherein the sensor module comprises:

a wireless power receiver circuit, electrically coupled to the sensor circuit, arranged for wirelessly receiving power from the communications module,

a sensor circuit, electrically coupled to the wireless power receiver circuit, the sensor circuit arranged for determining a sensed value,

a sensor module enclosure, at least partially encapsulating the sensor circuit, having at least one ingress protecting surface area and arranged for providing ingress protection for at least the wireless power receiver circuit; and

an intra module communications circuit, arranged for wirelessly transmitting data, based on the sensed value, between the sensor module and the communications module and/or the driver module.

12. A method for powering a light source comprised in a light fixture, the light fixture further comprising a driver module and a sensor module, the method comprising:

transferring, through conductive power transfer, an input power received from a power output terminal of the light fixture to a power input terminal of the driver module,

transforming the power received over the power input terminal of the driver module to a first output power for powering the light source and to a second output power for powering the sensor module,

transferring, through conductive power transfer, the first output power from the driver module to the light source,

transferring, through wireless power transfer, the second output power from the driver module to the sensor module,

transmitting, through wireless communications, an information signal received from the sensor module to the driver module, and

controlling the first output power such that the light output of the light source is based on the received information signal.