Koninklijke Philips Corporation N.V.

Appleton Grp LLC

Ajay Tripathi

Bernd Clauberg

Raman Nair Harish Gopala Pillai

Kaustuva Acharya

Yimin Chen

Timothy E Graff

Ravindra Viraj Gurjar

Ningliang Mi

Srinivasa M Baddela

Young-Kee Min

Nicholaos Hillas

Neil Jingo Samson Valmonte

Pankaj Prakashrao Tikle

Rama Venkat

Rohit Khetarpal

Patrick Murphy

Calvin Burnett

Earl Max Cambronero

Anand Upadhyay

Raghuram Narasimhan

A system is described. The system includes at least one power supply, a control system communicatively coupled to the at least one power supply, a communication module, and at least one channel connecting the at least one power supply to the communication module. The at least one channel is also configured to support communication according to a particular communication protocol. The communication module is configured to interface with two or more power supplies of the at least one power supply via the at least one channel, and each power supply of the at least one power supply is configured to transmit diagnostic data associated with the power supply to the communication module via the at least one channel.

Power supply communication architecture with diagnostics, analytics, and remote configuration for enhanced operation and maintenance

A low voltage lighting system including a fixture () having an array of LEDs () and an LED driver circuit (). The LED driver circuit () includes a Switch-mode Power Supply (SMPS) unit (), a current sensing unit (), a control unit () and a dimming input level shifting and signal conditioning unit (). The SMPS unit () produces an adequate DC power (+V, &#x2212;V) for driving the LEDs (). The control unit () receives a sensed current signal from the current sensing unit () and controls the SMPS unit () to maintain the output current within a pre-determined range. The control unit () receives a dimming signal from the dimming unit () or an emergency signal from a supply unit () to alter the output power of the SMPS unit () from normal mode to dimming mode or emergency mode respectively.

Low voltage LED lighting fixture

A programmable driver for driving a solid state lighting device includes a processing circuit, a voltage feedback loop and a power stage. The processing circuit is configured to determine a voltage reference signal based on a nominal current setting and a predetermined power limit. The voltage feedback loop is configured to receive the voltage reference signal and to determine a difference between a reference voltage indicated by the voltage reference signal and a drive voltage of the solid state lighting device. The power stage is configured to limit maximum output voltage for driving the solid state lighting device based at least in part on the determined difference between the reference voltage and the drive voltage of the solid state lighting device provided by the voltage feedback loop.

System and method for controlling maximum output drive voltage of solid state lighting device

A light driver having a primary side driver configured to convert an input from a mains power supply to a primary side output, and a secondary side driver coupled to the primary side driver and configured to rectify and filter the primary side output to provide a driver output current for driving a light load. A microcontroller controls the light driver at start-up so that the secondary side driver is powered-on and the primary side driver is in a non-powered state during a soft-start period, and subsequent to the soft-start period the secondary side driver is set to be in a low output state when powered-on and thereafter set to a state so that driver output current of the secondary side driver increases the light output from the light load from an initial dim level to a nominal dim level without flicker.

Method and apparatus to limit current overshoot and undershoot in light driver

A system for implementing mains-voltage-based dimming of a solid state lighting module includes a transformer, a mains sensing circuit and a processing circuit. The transformer includes a primary side connected to a primary side circuit and a secondary side connected to a secondary side circuit, the primary and second side circuits being separated by an isolation barrier. The mains sensing circuit receives a rectified mains voltage from the primary side circuit and generates a mains sense signal indicating amplitude of the rectified mains voltage. The processing circuit receives the mains sense signal from the mains sensing circuit across the isolation barrier, and outputs a dimming reference signal to the secondary side circuit in response to the mains sense signal. Light output by the solid state lighting module, connected to the secondary side circuit, is adjusted in response to the dimming reference signal output by the processing circuit.

System and method for implementing mains-signal-based dimming of solid state lighting module

A method and system of flicker suppression for an LED. The method includes providing a power supplyfor supplying current to the LED. The power supplyincludes a flicker suppressorand is responsive to a dim command signal. The method further includes receiving the dim command signal at the power supply, switching the current on and limiting the current to maintain LED light output below 110 percent of the LED light output corresponding to the dim command signal.

Startup flicker suppression in a dimmable LED power supply

A LED based lighting system () employs a LED load temperature sensor () for generating a temperature-sensing signal (TSS) indicative of an operational temperature of the LED load (), a LED current sensor () for generating a current-sensing signal (CSS) indicative of a flow of the LED current (I) through the LED load (), and a LED driver () for regulating the flow of the LED current (I) through the LED load () as a function a mixture of the current-sensing signal (CSS) and the temperature-sensing signal (TSS). The system () can further employ a driver disable notifier () and a LED driver disabler (), or alternatively, a fuse network () for disabling the LED driver () upon a detection of a fault condition of the system ().

LED temperature-dependent power supply system and method

The power supply () for LEDs provides power to a LED light source () having a variable number of LEDs wired in series and/or in parallel. The power supply () uses current and voltage feedback to adjust power to the LEDs and provides protection to the LED light source (). A feedback controller () compares sensed current and sensed voltage to a reference signal and generates a feedback signal, which is processed by a power factor corrector () to adjust the current flow through the transformer supplying current to the LEDs. A LED control switch () clamps a peak of the current to the LEDs to provide further protection to the LED light source (). A short/open detection circuit () indicates any detection of a 'LED outage' of the LED light source ().

LEDS driver

The power supply for LEDs of the present invention provides power to a variable number of LEDs wired in series or in parallel. The power supply uses current feedback to adjust power to the LEDs and provides protection against open circuits and circuit malfunctions. A current controller compares sensed current to a reference current and generates a feedback signal, which is processed by a power factor corrector to adjust the current flow through the transformer supplying current to the LEDs.

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Libertyville, IL, United States of America

Ajay Tripathi