Eldolab Holding B.V. Patent applications |
Patent application number | Title | Published |
20150069930 | METHODS AND APPARATUSES FOR OPERATING GROUPS OF HIGH-POWER LEDS - An energy-efficient, compact and cost-effective solution for driving a number of high-power LED groups for lighting applications includes using a single switching power supply together with LEDs connected in series and/or in parallel and pulse width-controlled switches in parallel across the individually controllable LED groups. If the switch of an LED group is ON, the LED group will not light up. If the switch is in the OFF position, the full current of the power supply will pass through the corresponding LED group. | 03-12-2015 |
20140333229 | DRIVER SYSTEM FOR DRIVING AT LEAST ONE LED - A driver system for driving at least one LED, the driver system includes an LED driver including a current source connected to the at least one LED for providing an LED drive current to the at least one LED, and a control module for controlling a flow of the LED drive current through the at least one LED. The driver system further includes a power supply having a power output terminal connected to a power input terminal of the current source for providing an electrical power to the current source. The control module includes a control signal output connected to a control signal input of the power supply for controlling an operation of the power supply. | 11-13-2014 |
20140191678 | POWER CONVERTER FOR AN LED ASSEMBLY AND LIGHTING APPLICATION - A power converter for an LED assembly includes a switched mode power supply arranged to power the LED assembly, an AC/DC converter arranged to provide a DC supply voltage to the switched mode power supply, and a control unit arranged to receive an input signal representing a required load voltage for powering the LED assembly. The control unit is arranged to control the AC/DC converter based on the input signal. | 07-10-2014 |
20140175981 | METHOD OF CONFIGURING AN LED DRIVER, LED DRIVER, LED ASSEMBLY AND METHOD OF CONTROLLING AN LED ASSEMBLY - A method of configuring an LED driver is disclosed. The LED driver being arranged to provide a supply current to an LED fixture comprising a plurality of LEDs. The method comprises: identifying the LED fixture (LF), sending via a communication network (NTW) a configuration request to a configuration database (DB), receiving configuration data from the configuration database; and configuring the LED driver (LPS) according to the configuration data. | 06-26-2014 |
20140009067 | LED DRIVER, LIGHTING DEVICE AND LED BASED LIGHTING APPLICATION - An LED driver for powering an LED fixture includes a power converter for converting an input power such as a rectified mains supply to an output power for powering the LED fixture; a control unit arranged to control an output characteristic of the power converter; optionally, a network terminal connected to the control unit for connecting the control unit to a network, the control unit being arranged to receive a control signal from the network via the network terminal for controlling the output characteristic; an application terminal connected to the control unit for connecting the control unit to a lighting device; the control unit being arranged to: provide a polling signal to the lighting device; receive, in response to the polling signal, a control signal for controlling the output characteristic. | 01-09-2014 |
20130320875 | INTERFACE CIRCUIT FOR A LIGHTING DEVICE - An interface circuit for a lighting device is described, the interface circuit comprising
| 12-05-2013 |
20130285572 | LED DRIVER CIRCUIT AND METHOD - A driver circuit for driving at least one LED includes a data input for receiving set point data at a first data rate and at a first bit resolution, an LED output for driving the at least one LED with LED driving values at a second data rate and at a second bit resolution, and a processing device arranged for determining from the set point data by interpolation at least part of the LED driving values. The second data rate is higher than the first data rate, the processing device being arranged to interpolate in time. | 10-31-2013 |
20130162165 | LED DRIVER AND METHOD OF CONTROLLING AN LED ASSEMBLY - An LED driver for powering an LED fixture is described, the LED driver including a switched mode power supply for providing a current to the LED fixture, and a control unit for controlling a switch of the switched mode power supply. The control unit includes an input terminal for receiving a set point representing a desired output characteristic of the LED fixture. The control unit is further configured to periodically determine an opening instance of the switch and a closing instance of the switch, determining an average current estimate based on at least one measurement of the current to the LED fixture at least one measurement instance determined on the basis of at least one of the opening instance or the closing instance of the switch, and applying the average current estimate as a feedback signal representing the average current for controlling the LED current. | 06-27-2013 |
20130026950 | DRIVER SYSTEM FOR DRIVING A PLURALITY OF LED'S - A driver system for driving a plurality of LED includes a control module having an input for receiving operating data, and at least one driver module for driving at least one of the LED. The driver module includes a hysteretical converter for generating a current to power the LED, and a controller electrically connected to the hysteretical converter for controlling the hysteretical converter. | 01-31-2013 |
20130020958 | LED DRIVER OPERATING IN BOUNDARY CONDITION MODE - An LED driver for controlling a current supplied to an LED fixture, the LED driver including a switched mode power supply (SMPS) for providing the current to the LED array and a control unit for controlling a switch of the SMPS. The control unit includes an input terminal connected to a current sensing circuit and the switch is connected to the LED fixture at a node downstream of the LED fixture. The current sensing circuit of the LED driver provides a feedback signal to the input terminal of the control unit; the current sensing circuit including a current sensor arranged to provide, when the switch is closed, the feedback signal representing a level of the current supplied to the LED fixture; the current sensing circuit further providing the feedback signal indicating a zero-crossing of the current supplied to the LED fixture when the switch is open. | 01-24-2013 |
20120235589 | METHODS AND APPARATUSES FOR OPERATING GROUPS OF HIGH-POWER LEDS - In energy-efficient, compact and cost-effective solution for driving a number of high-power LED groups for lighting applications includes using a single switching power supply together with LEDs connected in series and/or in parallel and pulse width-controlled switches in parallel across the individually controllable LED groups. If the switch of an LED group is ON, the LED group will not light up. If the switch is in the OFF position, the full current of the power supply will pass through the corresponding LED group. | 09-20-2012 |
20120229041 | LED DRIVER FOR POWERING AN LED UNIT FROM A ELECTRONIC TRANSFORMER - An LED driver comprising a power converter for powering an LED unit and a control unit for controlling the power converter is provided. The power converter comprising an input terminal for receiving a rectified AC supply voltage, and an output terminal for supplying a current to the LED unit, and the control unit comprising—an input for receiving a supply signal representative of the supply voltage and—an output for providing a control signal to the power converter The control unit is further arranged to:—determine the control signal for controlling the power converter based on the supply signal, and—control the power converter to supply the current to the LED unit based on the control signal, the current being amplitude modulated in synchronism or in phase with the rectified AC supply voltage. | 09-13-2012 |
20120223649 | CONTROL UNIT FOR LED ASSEMBLY AND LIGHTING SYSTEM - A lighting system comprising an LED assembly that comprises a first and second LED unit said LED units being serial connected is described. The system comprises; a switched mode power supply for powering the LED assembly; a control unit for controlling the LED assembly the control unit being arranged to: receive an input signal representing a desired output characteristic of the LED assembly, determine a first and second duty cycle for the respective first and second LED units associated with a nominal current of the switched mode power supply, for providing the desired output characteristic, determine the largest of the first and second duty cycles for respective LED units, determine a reduced current based on at least the largest of the duty cycles, adjust the first and second duty cycle for respective LED units based on the reduced current or the largest of the duty cycles, provide output data for the LED assembly and the switched mode power supply based on the adjusted first and second duty cycles and the reduced current. The LED assembly of the system further comprises a capacitor connectable in parallel to the first and second LED units by operating a switch connected in series with the capacitor and wherein the control unit is arranged to control the switch based on at least one of the reduced current and the input signal. | 09-06-2012 |
20120212156 | METHOD FOR OPERATING A LIGHTING GRID AND LIGHTING UNIT FOR USE IN A LIGHTING GRID - A method of operating a lighting grid having lighting units the method including receiving an input signal from a sensor or a user interface by a first lighting unit, determining a control signal for controlling an LED driver and/or LED assembly of the first lighting unit based on the input signal, transmitting an output signal to a second lighting unit, the output signal being based on the input signal and enabling an identification of the first lighting unit, the sensor or the user interface, receiving the transmitted output signal from the first lighting unit by the second lighting unit, establishing an identification, based upon the received output signal, of the first lighting unit, the sensor or the user interface, and determining a further control signal for controlling an LED driver and/or LED assembly of the second lighting unit based on the output signal and the identification. | 08-23-2012 |
20120176064 | LED DRIVER AND LIGHTING APPLICATION FOR WATTAGE CONTROL - An LED driver for powering an LED fixture is described, the LED driver comprising:
| 07-12-2012 |
20120104974 | CONTROL UNIT FOR A LED ASSEMBLY AND LIGHTING SYSTEM - A control unit for a LED assembly includes a first and second LED unit, the LED units being serial connected. The LED assembly, in use, is powered by a switched mode power supply. The control unit being arranged to receive an input signal representing a desired output characteristic of the LED assembly, determine a first and second duty cycle for respective LED units associated with a nominal current of the switched mode power supply, for providing the desired output characteristic, determine the largest of the first and second duty cycles for respective LED units, determine a reduced current based on at least the largest of the duty cycles, adjust the first and second duty cycle for respective LED units based on the reduced current, and provide an output signal for the LED assembly and the switched mode power supply based on the adjusted first and second duty cycles and the reduced current for obtaining the desired characteristic. | 05-03-2012 |
20120014111 | LED LAMP COMPRISING LIGHT GUIDE INCLUDING FIRST AND SECOND DIFFUSING SURFACES - An LED lamp is described, the LED lamp comprising an LED unit, e.g. provided on a base, in an embodiment, a fitting for contacting a power supply, and a light guide arranged to receive a light beam from the LED unit and guide the light beam towards a first light diffusing surface thereby providing a diffused light beam and whereby the light guide further comprises a second light diffusing surface facing the first light diffusing surface for diffusing at least part of the diffused light beam. The LED lamp as described enables to provide an omnidirectional light distribution, comparable to the light distribution of a conventional filament based light bulb. | 01-19-2012 |
20110280561 | LIGHTING ASSEMBLY FOR AN IMAGE CAPTURING SYSTEM COMPRISING LED ELEMENTS - The invention relates to a lighting assembly for an image capturing system. The lighting assembly includes at least one lighting element for generating light and a control system arranged to control the at least one lighting element and to interface with at least one camera of the image capturing system. The control system is arranged for controlling an intensity and a spectrum of the at least one lighting element. The control system is arranged to provide a control for emitting a constant light or a pulsed light with the at least one lighting element. The at least one lighting element includes at least one LED being at least one high CRI white LED. | 11-17-2011 |
20110248644 | METHOD OF CONFIGURING AN LED DRIVER, LED DRIVER, LED ASSEMBLY AND METHOD OF CONTROLLING AN LED ASSEMBLY - A method of configuring an LED driver is disclosed. The LED driver being arranged to provide a supply current to an LED fixture comprising a plurality of LEDs. The method comprises: identifying the LED fixture (LF)1 sending via a communication network (NTW) a configuration request to a configuration database (DB), receiving configuration data from the configuration database; and configuring the LED driver (LPS) according to the configuration data. | 10-13-2011 |
20110148685 | CONFIGURABLE LIGHT FIXTURE, CONFIGURABLE LIGHTING SYSTEM AND METHOD FOR CONFIGURING A LIGHTING SYSTEM - A configurable light fixture for a lighting system is described. The light fixture comprising a receiver, wherein the receiver of the light fixture is arranged to, upon receipt of a pairing signal from a transmitter, store a transmitter ID comprised in the pairing signal in a first memory unit when the pairing signal is received within a pairing time window, the pairing time window being opened when the receiver is switched on from an off state, the receiver being arranged to, upon receipt of a control signal, compare a transmitter ID comprised in the control signal with the stored transmitter ID and release the control signal when the stored transmitter ID corresponds with the transmitter ID comprised in the control signal. | 06-23-2011 |
20110121757 | CONTROLLER FOR CONTROLLING AN LED ASSEMBLY, LIGHTING APPLICATION AND METHOD FOR CONTROLLING AN LED ASSEMBLY - A controller for controlling an LED assembly is described. The controller is arranged to—receive an input signal representing a required characteristic of the LED assembly,—convert the input signal to a control signal for the LED assembly,—apply a correction to the control signal to obtain a corrected control signal, the correction being based on a predetermined transient characteristic of the LED assembly,—output the corrected control signal. As such, a better correspondence between a required characteristic and an actual characteristic of the LED assembly is obtained. | 05-26-2011 |
20110115412 | POWER CONVERTER FOR AN LED ASSEMBLY AND LIGHTING APPLICATION - The present invention relates to a power converter for an LED assembly, the power converter comprising—a switched mode power supply arranged to power the LED assembly, an AC/DC converter arranged to provide a DC supply voltage to the switched mode power supply, a control unit arranged to receive an input signal representing a required load voltage for powering the LED assembly, the control unit being arranged to control the AC/DC converter based on the input signal. | 05-19-2011 |
20110084615 | LED ASSEMBLY, LED FIXTURE, CONTROL METHOD AND SOFTWARE PROGRAM - A plurality of LEDs arranged in groups, each group comprising at least one LED, a control circuit for driving the LEDs, the control circuit comprising a sensing device for sensing an operative parameter of the LEDs. The control circuit is arranged to: a) operate at least one group of the LEDs: b) sense by the sensing device a value of the operative parameter of the at least one group; c) repeat a) and b) for at least a different one of the groups; d) assign to each of the groups of LEDs a value of the operative parameter from the sensed operative parameter values; and e) control the driving of the groups of LEDs from the assigned operative parameter values. | 04-14-2011 |
20110050113 | Illumination System Comprising A Light Source And A Control Unit And An Illumination Control System For Controlling A Light Source By Multiple User Interface Surfaces - An Illumination system comprising a light source ( | 03-03-2011 |