Signify Holding B.v.

Philips Lighting Holding B.v.

Koninklijke Philips Corporation N.v.

U.S. Philips Corporation

Philips Electronics North America Corporation

Eugen Jacob De Mol

Marcel Beij

Dmytro Viktorovych Malyna

Henricus Marius Joseph Maria Kahlman

Christian Tenhumberg

Peter Johannes Martinus Bukkems

Bernd Ackermann

Vincent Stefan David Gielen

Ihor T Wacyk

Bertrand Johan Edward Hontele

Johan-Paul Marie Gerard Linnartz

Marco Haverlag

Kumar Arulandu

Christian Hattrup

René Theodorus Wegh

Ulrich Boeke

Berend Jan Willem Ter Weeme

Georges Marie Calon

Theo Gerrit Zijlman

Mark Johannes Antonius Verhoeven

Liang Zhou

Machiel Antonius Martinus Hendrix

Reinier Imre Anton Den Boer

Dennis Johannes Antonius Claessens

Nicolaas Antonie Van Rijswijk

Machiel A Hendrix

Guy Louis Paul De Bondt

Franciscus Jacobus Vossen

Maurice Lucien Eugene Casanova

Martijn Evert Paul Jansen

Zhaomin Meng

Hongwu Wang

Willem Van Dijk

Wessel Van Sluis

Richard Godefridus Cornelis Van Der Wolf

Vinit Jayaraj

Robertus Johannes Maria Mathilde Snijkers

Liang Tian

Paul Joseph Maria Beerens

Yufei Zhou

Ludoviscus Franciscus Johannes Oostvogels

Hengliang Luo

James Jin

Ludovicus Franciscus Johannes Oostvogels

A circuit comprises a first printed circuit board () carrying a first set of components and a second printed circuit board () carrying a second set of components, with a clearance () between the first and second printed circuit boards. A transformer () has a primary side connected to the first set of components and a secondary side connected to the second set of components. One of the transformer windings, and its connection to a respective set of components, comprises a triple insulated wire. A glass, ceramic or mica spacer () mounted to the first and second printed circuit boards defines and sets the clearance () between the first and second printed circuit boards. The clearance requirement is met by providing separate printed circuit boards with spacing between them and the use of a triple insulated wire addresses or overcomes issues of creepage. Thus, high frequency and high voltage operation on the first printed circuit board is possible.

Electronic circuit with isolation

A mechanism for performing a communication using a visible light communication (VLC) protocol. The mechanism proposes to modulate a bus voltage provided to all lighting elements (comprising LED elements) of a lighting unit, so that the magnitude of light emitted by all lighting elements is modulated according to a same modulation scheme. A lighting system having a plurality of lighting elements is also proposed.

Performing visible light communication with a lighting unit

A Digital Addressable Lighting Interface, DALI, enabled communication device for transmitting messages over a communication bus having two communication lines, said device comprising a switch connected between said two communication lines, a controller arranged for controlling said switch for imposing logical communication levels on said communication bus, an energy storage device, connected in series with said switch, and arranged for storing electrical energy flowing from said bus through said switch, a bypass circuit arranged for bypassing said energy storage device when a voltage over said energy storage device is above a predetermined voltage threshold.

Digital Addressable Lighting Interface, DALI, enabled communication device for transmitting messages over a communication bus, as well as a corresponding method

A driver for driving a load, wherein the driver comprises a dual-boost converter comprising an output capacitance comprising a first output capacitor connected in series with a second output capacitor, a first switch connected to a power input stage via a first inductor and arranged for controlling charging of said first output capacitor via a first diode and a second switch, connected in series with said first switch, and connected to the power input stage via a second inductor and arranged for controlling charging of said second output capacitor via a second diode; wherein a centre tap of said in series connected first and second output capacitor is connected to a centre tap of said in series connected first and second switch.

Driver for a load, as well as a corresponding light emitting diode, LED, based lighting device and a method

The invention relates to a lighting apparatus for coupling to an LED driver. The lighting apparatus comprises a plurality of LEDs in a series connection arranged to form an LED string having a first end and a second end, a heatsink thermally coupled to the LED string, wherein the heatsink is electrically conductive, a capacitor coupled between the first end of the LED string and the heatsink and an electrical connection between the second end of the LED string and the heatsink.

ESD protection of chip scale package LEDS

A Light Emitting Diode, LED, based lighting device arranged to emit colored light, wherein said LED based lighting device comprises a first LED channel comprising at least one LED arranged for emitting light at a first color, a second LED channel comprising at least one LED arranged for emitting light at a second color, said second color being different to said first color, a controller arranged for activating said first LED channel and said second LED channel based on a color ratio such that said LED based lighting device emits light having a particular color, wherein said controller is further arranged for correcting said color ratio based on aging of said at least one LED in said first LED channel and on said at least one LED in said second LED channel, thereby ensuring color consistency of said particular color of said LED based lighting device over time.

Light emitting diode, LED, based lighting device arranged to emit colored light as well as a corresponding method for operating such a LED based lighting device

The invention relates to a lighting system comprising a load comprising a parallel configuration of a first LED load having a first forward voltage, and a first switch coupled in series with the first LED load; and a second LED load, having a second forward voltage being different than the first forward voltage; a switched mode power supply comprising a switching element; an inductor; a diode; a set of output pins for coupling to the load; and a capacitor coupled across the set of output pins; wherein the switched mode power supply is arranged to provide a voltage across the set of output pins, wherein the lighting system comprises a further inductor coupled between the one of the output pins and the load.

Balance control for 2-channel CCT dimming

A power supply for an LED lighting unit. The power supply comprises two power converters, either of which may provide the power to be drawn by components of the LED lighting unit. In particular, a controller of the power supply controls which power converter converts a mains power supply to a power level for a connected LED lighting unit. The two power converters are designed to be efficient when providing different power levels.

Power supply for an LED lighting unit

A LED driver comprises two output contacts () and an additional contact () which enables detection of connection of the LED driver to a LED module (). The LED driver has a normal current regulating mode and an open circuit protection voltage regulating mode. The LED driver is switched from the voltage regulating mode to the current regulating mode in response to the detection of connection of the LED module. This enables a LED module to be connected to the LED driver while it remains powered, in particular because the LED driver is placed in a voltage regulating mode prior to connection to the LED module.

LED driver and a LED module for use with the driver

The present invention relates to a frame () for supporting a light guide panel (). The frame () being provided with: a solid state light source () connected to and arranged on a circuit board (), the circuit board () comprising an electrically insulating outer perimeter portion (); an insulation layer () being electrically insulating, the insulation layer () having a surface area larger than a surface area of the circuit board (); wherein the insulation layer () is arranged on the frame (); the circuit board () is arranged on the insulation layer () such that an insulating outer perimeter portion () of the insulation layer () is formed outside of the circuit board (); thereby providing a double insulation of the solid state light source () in relation to the frame (). The invention also relates to a luminaire () comprising the frame ().

Frame for supporting a light guide panel and luminaire comprising the frame

There is provided a light module having a housing, a first circuit board arranged in the housing and comprising a central through hole, a front side on which driver electronics through-hole components are mounted, and a back side from which leads of the driver electronics through-hole components protrude, wherein a gap behind the first circuit board accommodates the leads, and a second circuit board electrically connected to the first circuit board and comprising at least one solid-state lighting element adapted to emit light, wherein the second circuit board is arranged in level with the first circuit board or in a plane behind the first circuit board.

Light module providing positioning and fixation of a circuit board in a housing

The present invention relates to an end cap () for a tubular light source the tubular light source configured to be arranged in a lighting fixture comprising a socket, wherein the end cap () comprises a housing portion having a connection end, two connector pins () at least partly arranged on an outside of the housing portion at the connection end, wherein the connector pins () are configured to fit in the sockets of the lighting fixture, a first spring loaded switching element () configured to be alternately positioned in an actuated state and a non-actuated state, wherein the first spring loaded switching element () protrudes at the connection end of the housing portion in the vicinity of the connector pins () when positioned in its non-actuated state, and a second spring loaded switching element () configured to be positioned in an actuated state and a non-actuated state, wherein the switching elements () are configured to be individually positioned in their respective actuated states to form an electrical connection between the socket and the tubular light source when the end cap () is mounted into the socket of the fixture.

End cap for a tubular light source

A lighting circuit and a method of operating a lighting circuit are described. A rectifierhas an input for an alternating voltage V. At least a first and a second LED assemblyare connected to be supplied with electrical power from the rectifier. The first LED assemblyis electrically connected to a first outputof the rectifierand electrically connected in series with an inputof a switching converter circuit. The second LED assemblyis electrically connected to an outputof the switching converter circuit. A control assemblyis connected to a tapin the series connection for controlling operation of the first LED assembly

Efficient lighting circuit for LED assemblies

The invention describes a surge-protection arrangement () for an electronic device () comprising a heat-dissipating load () thermally connected to a heat sink () of the load (), which surge protection arrangement () comprises at least one high impedance arrangement (Z, Z, Z) connected in series with the load (); at least one low impedance arrangement (Z, Z, Z) connected in parallel with the load (); and a ground connection (FE) arranged to electrically connect the heat sink () and a low impedance arrangement (Z, Z, Z); wherein the high-impedance arrangement (Z, Z, Z) is realized to discourage a common-mode surge current (Is) from entering the load (), and the low-impedance arrangement (Z, Z, Z) is realized to encourage a common-mode surge current (Is) to bypass the load () into a ground connection (FE). The invention further describes an electronic device () comprising a load () with a number of heat-dissipating components () thermally connected to a heat sink () of the load (); a driver () realized to drive the load (); and such a surge protection arrangement (). The invention also describes a driver () realized to drive an LED lighting circuit () and comprising such a surge protection arrangement (); and a method of providing protection against a common-mode surge current (Is) through an electronic device () comprising a heat-dissipating load () thermally connected to a heat sink () of the load ().

Surge-protection arrangement

Step dimming of a fluorescent lamp load through sensing of power line interruptions generated through the toggling of a switch. The number of power line interruptions through toggling produced within a predetermined period of time identifies the level of dimming desired. In the event that interruption of power to the ballast exceeds the predetermined period of time, the lamp load will be reset to a prefixed level of illumination once power is restored.

Fluorescent lamp dimming

Growing community of inventors

Eindhoven, Netherlands

Eugen Jacob De Mol