Koninklijke Philips Corporation N.V.

Philips Lighting Holding B.v.

Nxp B.v.

Signify Holding B.v.

Georg Sauerländer

Carsten Deppe

Christian Hattrup

Thomas Dürbaum

Kumar Arulandu

Matthias Wendt

Patrick Alouisius Martina De Bruycker

Ronald Hans Van Der Voort

Dalibor Cvoric

Guy Louis Paul De Bondt

Haimin Tao

Reinhold Elferich

Toni Lopez

Dirk Hente

Robertus Leonardus Tousain

Heinz Willi Van Der Broeck

Tobias Georg Tolle

Yi Wang

Philip Louis Zulma Vael

Sait Izmit

Harald Josef Günther Radermacher

Ralph Kurt

Bart Andre Salters

Gian Hoogzaad

Bernd Ackermann

Adrianus Sempel

Bertrand Johan Edward Hontele

Johan-Paul Marie Gerard Linnartz

Theodorus Johannes Petrus Van Den Biggelaar

Wolfgang Otto Budde

Peter Lürkens

Henricus Marius Joseph Maria Kahlman

Theo Gerrit Zijlman

William Peter Mechtildis Marie Jans

Anteneh Alemu Abbo

Dennis Johannes Antonius Claessens

Harald Willwohl

Humphrey De Groot

Dennis Claessens

Cornelis Johannes Adrianus Schetters

Henricus Franciscus Bonekamp

Iain Mosely

F Javier Esguevillas

Coen Theorodus Hubertus Fransiscus Liedenbaum

Cornelis Schetters

The invention relates to a peripheral device for communicating with a host and for controlling a controlled device, to a system including such peripheral device and at least the controlled device and to a corresponding method including a communication and a controlling. In order to allow for a possibility for upgrading controlled devices with further functionality during their service life at low initial costs or efforts on the side of the controlled devices, it is provided for an interconnection between a portion of the system using a complex standard and another portion of the system not using such standard by means of the peripheral device having a dual purpose, as a peripheral device to the standard compliant host and as a controlling device to the controlled device. In both cases, however, power is provided to the peripheral device from either the host or from the controlled device.

Peripheral device, system including the peripheral device and method

An AC input power converter comprising a rectifier circuit (D, D, D, D) for rectifying an AC input signal, a first unidirectional device (D) coupled in series with a first capacitor (C) for charging the first capacitor (C) and wherein the first unidirectional device (D) and the first capacitor (C) are arranged in parallel to an output of the rectifier circuit (D, D, D, D), a second unidirectional device (D) coupled in series with a second capacitor (C) for charging the second capacitor (C) and wherein the second unidirectional device (D) and the second capacitor (C) are arranged in parallel to an output of the rectifier circuit (DD, D, D), a first output (OUT) for providing a first power and a first average voltage to a first power converter, wherein the first output (OUT) s coupled to a first node between the first capacitor (C) and the first unidirectional device (D) and a second output (OUT) for providing a second power and a second average voltage to a second power converter, wherein the second output (OUT) is coupled to a second node between the second capacitor (C) and the second unidirectional device (D), wherein the first capacitor (C) has a first value and the second capacitor (C) has a second value, and wherein the first value of the first capacitor and the second value of the second capacitor are selected such that when the first power is lower than the second power, the first average voltage is larger than the second average voltage, and when the first power is larger than the second power, the first average voltage is lower than the second average voltage.

Apparatus and system for providing a power converter

An AC/DC converter and conversion method are provided, in which an AC input is rectified and shaped by a waveform shaping capacitor. A current source circuit is used to provide the output current to the output load which has a parallel bulk capacitor. The current source circuit is switched on and off with timing which is dependent on the phase of the AC input signal. This enables a relatively high power factor, for example between 0.7 and 0.9, with low cost circuitry with few components.

AC/DC converters having power factor correction

A lighting device () and a method of manufacturing a lighting device, wherein the lighting device comprises at least one light source () arranged to generate light. The lighting device further comprises a light-transmissive envelope () enclosing the at least one light source and being arranged to transmit the light generated from the light source. The lighting device further comprises a driver unit () arranged for electrical supply to the at least one light source, the driver unit comprising a primary driver circuit () connectable to an electric energy source, at least one secondary driver circuit () connected to the at least one light source, and a transformer () arranged to transfer electrical energy between the primary driver circuit and the at least one secondary driver circuit, wherein at least the transformer and the at least one secondary driver circuit driver unit are arranged within the envelope.

Lighting device comprising a driver unit and method of manufacturing the same

Arrangements () for buffering energy comprise buffer capacitor circuits () with one or more buffer capacitors (), first circuits () for guiding charging currents for charging the buffer capacitor circuits (), and second circuits () with current source circuits (-) for defining amplitudes of de-charging currents for de-charging the buffer capacitor circuits (), to better control the de-charging of the buffer capacitor circuits (). The second circuits () may further comprise trigger circuits (-) for bringing the current source circuits (-) into activated modes, and latch circuits (-) for latching the current source circuits (-). The arrangements () may further comprise smoothing capacitor circuits () with one or more smoothing capacitors (). The buffer capacitor circuits () may be coupled serially to the first circuits (), and the first and second circuits () may be coupled in parallel to each other.

Buffering capacitor for diode bridge rectifier with controlled decharging current

Control circuits () bring power converters () in different modes in response to detection results. The power converters () exchange possibly rectified first voltage/current signals with electronic halogen transformers () and supply second voltage/current signals to light emitting diode circuits (). The first current signals have, in different modes, different amplitudes. The different amplitudes have different constant values and/or different derivative values. As a result, the first current signal has become a relatively varying first current signal. Then, the halogen transformers () no longer experience problems that occur when smaller amounts of power need to be provided than designed to. The detections may comprise polarity detections of and/or zero-crossing detections in the first voltage signals. The halogen transformers () comprise self-oscillating switched mode power supplies designed to provide first amounts of power at their outputs. The light emitting diode circuits) are designed to consume second amounts of power smaller than the first amounts.

Power converter between halogen transformer and LED

A lighting system () comprises a power unit () for producing data-modulated current, and a light unit () receiving this current at its input and output terminals (). The light unit comprises two or more light modules (A;B;C) connected in series. Each light module comprises:

Lighting system with a plurality of LEDs

The invention describes a low-power load arrangement () comprising a low-power load (); a driver () for the low-power load (); connectors () for connecting to an electronic transformer () realized for converting a mains power supply () to a power supply for a normal-power load (); and a reverse current generating means (L, SB) realized to provide a reverse current (I, I) to sustain self-oscillation during operation of the electronic transformer (), wherein the direction of current flow of the reverse current (I, I) is opposite in direction to the output current of the electronic transformer (). The invention further describes a lighting arrangement () comprising an electronic transformer () realized for converting a mains power supply () to a power supply for a normal-power load; a low-power load () connected to the electronic transformer (), which low-power load () comprises a low-power light source (); and wherein the lighting arrangement () comprises a reverse current generating means (L, SB) realized to provide a reverse current (I, I) to sustain transformer self-oscillation when the transformer () drives the low-power load (), wherein the direction of current flow of the reverse current (I, I) is opposite in direction to the output current of the electronic transformer (). The invention also describes a method of driving a low-power load () with an electronic transformer () realized for driving a normal-power load ().

Lighting arrangement

The invention relates to an illumination device for embedding data symbols of a data signal into a luminance output of the illumination device. The device includes a LED comprising at least two segments which have a common electrode and are individually controllable. The LED is configured to generate the luminance output in response to a drive signal. The device further includes a controller configured for switching one of the segments on or off in response to the data signal to embed data symbols of the data signal into the light output of the device. One advantage of such an approach is that the proposed device is compatible with conventional LED drivers since no additional electronics for modulating the drive signal are necessary, which enables simple implementation and reduced costs.

Coded light emitting device

In various embodiments a device and method for providing power to an LED unit and modulating light emitted from the LED unit is disclosed. In one example, the device is configured to be connected between a driver and the LED unit. In this example, the device comprises a controllable resistor that receives from the driver a driver output voltage and to provides a load current to power the LED unit, a frequency filter for providing a substantially constant voltage to the LED unit, the frequency filter being connected to the controllable resistor to provide a substantially constant electrical power to the LED unit, and a modulator coupled in series to the LED unit for modulating the drive current and for modulating the emitted light output, wherein the substantially constant voltage applied to the LED unit is further applied to the modulator by means of the frequency filter.

Driver device and driving method for driving a load, in particular an LED unit

A circuit arrangement () is provided for operating at least one low-power lighting unit with a power supply () and in particular with a self-oscillating power supply. The circuit arrangement () comprises at least an input () for receiving an operating voltage () from said power supply () and an output () for connection to one or more low-power lighting units. To allow an efficient operation of said low-power lighting unit with the power supply (), the circuit () comprises a pulse generator (), connected with said input () and adapted to inject at least one trigger pulse () into said power supply () during operation.

Circuit arrangement for operating a low-power lighting unit and method of operating the same

The invention relates to a circuit arrangement () for controlling at least one load (D, D, D). In order to provide means for extracting an auxiliary power supply from a current source in order to control shunt switching, the inventive circuit arrangement () comprises an input terminal () for connection to a power supply (), an output terminal () for connection to at least one load element (), a control circuit (), comprising a control device (), which is adapted to control at least one load element (), and an energy storage device (C), which is adapted to supply power to the control device (). A controllable bypass switch (M) is further provided, wherein said bypass switch (M) and said control circuit () are connected in parallel and are connected between said input terminal () and said output terminal (). The circuit arrangement () is adapted to operate the bypass switch (M) to control the power provided to the control circuit.

Circuit arrangement for controlling at least one load

A light generating device () is provided with at least a voltage input () adapted for receiving a variable voltage, at least three LED circuits (), coupled with said voltage input (), wherein each LED circuit () comprises a LED unit () and controllable current regulator () to control the current through said LED circuit (). The light generating device () further comprises a controllable switch matrix () comprising a plurality of switches (), said switch matrix () is configured to operate in at least three different switching modes and a controller (), connected at least with said switch matrix (), configured to determine said variable operating voltage and to control the switching mode of said switch matrix () in dependence of the determined operating voltage. To provide an efficient operation of such device () with a variable operating voltage, such as an AC voltage, in a first switching mode, said LED units () are connected parallel to each other, in a second switching mode, at least two of said LED units () are connected in series and in a third switching mode, said LED unitsare connected in series with each other.

Light generating device

The present invention relates to a driver device () and a corresponding driving method for driving a load (), in particular an LED unit () including one or more LEDs, said driver device comprising a power input unit () for receiving an input voltage (V) from an external power supply () and for providing a rectified supply voltage (V), a controllable resistor () for providing a load current (I L) to power the load (), a frequency filter () connected to the power input unit () for providing a voltage (V) to the load (), wherein the frequency filter () is partially coupled in parallel to the load () and connected to the controllable resistor () to provide a substantially constant electrical power to the load ().

Growing community of inventors

Aachen, Germany

Georg Sauerländer