Eldolab Holding B.v.

Koninklijke Philips Corporation N.v.

Abl IP Holding LLC

Endolab Holding B.v.

Imagingete Inc.

Marc Paul Saes

Petrus Johannes Maria Welten

Stephen Haight Lydecker

Tijs Versteegde

Marinus Johannes Adrianus Maria Van Helvoort

Andy Johanna Elisabeth Otten

Franciscus Bernardus Marie Van Horck

Filips Van Liere

Yenpao Albert Lu

Hubert Johan Marie Robert Van Doorne

Nicolaas Johannes Antonius Gommans

Richard Lee Westrick, Jr

Johan Samuel Van Den Brink

Sajin George

Dalibor Zulim

Robert Paul Kleihorst

Paulus Cornelius Hendrikus Adrianus Haans

Johannes Den Boef

Lambertus De Vries

Dirk Jan Broer

Ralph Kurt

Miha Fuderer

Dagnachew Birru

Cornelis Leonardus Gerardus Ham

Mitri J Abou-Rizk

Gosta J Ehnholm

Emiel Peeters

Roel Penterman

Michel Paul Barbara Van Bruggen

Marinus J A M Van Helvoort

Jeff Bennett

Hans Van Zon

Marcellus Hendricus Marinus Waltherus Melters

Frank Van Horck

Willem Johannes Maria Verbeek

William Scott Geffert

Stephen Haight Leydecker

A multi-channel LED driver for driving an LED fixture, wherein the multi-channel LED driver comprising a plurality of output channels, wherein each output channel is connectable to an LED or LED string of the LED fixture, the multi-channel LED driver comprising:

Method of multi-channel control

A modular system includes an LED driver and an LED light engine. The driver includes a switched mode power converter and a first control unit to control a switch of the converter, thereby controlling the supply current to an LED assembly of the light engine. The assembly includes LEDs and one or more switches arranged in series or in parallel with one or more of the LEDs. The light engine also includes a second control unit controlling the one or more switches of the LED assembly so as to control current through the LEDs. The first control unit controls amplitude of the supply current. The second control unit controls duty cycle of the LED current through the LEDs. The first and second control units are configured to synchronize a switching operation of the switched mode power converter with a switching operation of the switches of the light engine.

Modular lighting application

A method of operating a distributed light source and a distributed light source are disclosed. The distributed light source comprising a plurality of light sources to display an image, the method comprising the steps of:

Method of operating a distributed light source for displaying moving images and distributed light source

A visual light communication (VLC) method for a lighting system comprising an LED driver and a plurality of LEDs or LED groups includes the steps of: receiving a set-point representing a desired illumination characteristic, comprising an intensity set-point, a color set-point or a combination thereof, and data that is to be transmitted using VLC; determining a current profile for each LED or LED group of the plurality of LEDs or LED groups based on the desired illumination characteristic represented by the set-point, whereby an envelope of a combined current profile is modulated for a corresponding intensity variation as perceived by a sensor to represent a variable length VLC code comprising one or more code words; and generating one or more control signals to drive the plurality of LEDs or LED groups in accordance with the current profiles for the plurality of LEDs or LED groups to transmit the VLC code.

LED driver for VLC

A method of initializing an LED driver to power an LED light engine comprising one or more LEDs is disclosed, the method comprising:

LED based illumination system

Disclosed is a power supply. In an example, the power supply comprises a switched mode power converter. The switched mode power converter comprises an input terminal for receiving an input voltage, and an output terminal for supplying a power to a load. A control unit of the power supply controls a switch of the switched mode power converter. A current-limited power supply powers the control unit, and is connected to the input voltage, whereby the control unit is configured to control an input current to the switched mode power converter.

Neutral-less power supply with buck converter

A method for starting up an illuminating process of a plurality of series connected LEDs by means of a LED driver is described, whereby a maximum allowed voltage output of the LED driver is lower than a forward voltage of the plurality of series connected LEDs in a cold state. The method comprises:

Smart starting up method by an LED driver

The present invention pertains to a system and method for operating at least one LED unit of lighting grid comprising a plurality of LED units, wherein the LED units are configured to transmit a VLC signal including a code word. A plurality of user equipment devices captures the light transmitted by the LED unit and determines parameters related to the light, such as a VLC quality parameter, flicker value, light intensity parameter and light colour parameter. Based on these parameters, a controller determines control parameters for the LED unit. As such, a feedback loop is created wherein the LED unit is controlled based on measurements with the user equipment devices.

System and method for operating at least one LED unit of a lighting grid comprising a plurality of LED units

A control circuit and method are provided for a controlled start-up of N LED groups. The control circuit comprising a LED switching element and a chargeable element in parallel with each LED group, and a low-power source. The method comprising a step of prior to supplying power to the LED groups, setting the LED switching elements in a second state corresponding with the LED group being off. Alternatively, a lower chargeable element is connected via a diode with the top of a higher chargeable element. The control circuit may further comprise a switch having a lighting mode wherein current flows through the LED groups or the corresponding LED switching elements, and a charging mode wherein current flows to the chargeable elements, thereby charging the chargeable elements.

Control circuits and methods for driving at least one LED group

An LED driver is described, the LED driver comprising:

LED driver and method of operating an LED driver

A mobile device logs in to an authorization server, via a mobile device network communication interface, over a secondary network. The mobile device receives, via an image sensor, over a light communication band, a respective verification code. In response to logging in to the authorization server and receiving the respective verification code, the mobile device transmits, via the mobile device network communication interface over the secondary network, the respective verification code to the authorization server. In response to transmitting the respective verification code to the authorization server, the mobile device obtains, via the mobile device network communication interface over the secondary network, an authentication approval to control a plurality of RF nodes over a local wireless communication network.

Physical verification and authorization for wireless control of a network

A power converter powers an LED fixture from a power supply, and comprises

Power converter for LED

An LED driver comprises a current source and a power supply configured to provide a power supply output voltage to the current source. The LED driver further comprises a controller configured to measure a voltage drop over the current source and to generate a feedback signal in response to the measured voltage drop. The power supply comprises a power supply regulator configured to regulate the power supply output voltage of the power supply between a minimum power supply output voltage and a maximum power supply output voltage, the power supply regulator comprising a power supply regulator input. The feedback signal is provided to the power supply regulator input, in a range from a first feedback signal value representing a minimum power supply output voltage to a second feedback signal value representing a maximum power supply output voltage. At a start-up of the LED driver, the controller provides the feedback signal at the first feedback signal value, and the power supply regulator, in response to receiving the first feedback signal value, controls the power supply to provide the minimum power supply output voltage.

LED driver and method

Growing community of inventors

Beek en Donk, Netherlands

Marc Paul Saes