Ledvance Gmbh

Nilesh Patel

Yuhao Liu

Ming Chu Li

Valeriy Zolotykh

Arunava Dutta

Ravidasa Hegde

Ming Li

Brian G Lariviere

Thomas James Peles

Steven C Farley

Thomas J Spehalski

A driver circuit that includes an input side including a power input circuit and an output side including a light emitting diode (LED) output current circuit. The output side of the driver circuit includes an output smoothing capacitor for controlling flicker percentage. A light emitting diode (LED) power supply circuit is present between the input side and the output side for controlling current from the AC power input circuit to the light emitting diode (LED) output current circuit. The LED power supply circuit includes at least two linear current regulators that are connected in parallel. The circuit also includes a controller circuit including a controller for signaling the light emitting diode (LED) power supply to control current to the light emitting diode (LED) output current circuit to provide a lighting characteristic.

Low standby power smart bulb based on a linear power supply

A driver circuit for lighting applications that includes a power input circuit for receiving power; a light emitting diode (LED) output current circuit for interfacing with a light source; and a light emitting diode (LED) power supply circuit for controlling current to the light emitting diode (LED) output current circuit. A controller circuit is present in the circuit for signaling the light emitting power supply (LED) to control current to the light emitting diode (LED) output current circuit. The controller is reset by removing power to the controller. A smoothing capacitor is present for stabilizing at least an output voltage. The circuit further includes a current rectifying circuit that prohibits back current traveling from the smoothing capacitor to the controller circuit when the AC power is off.

Reliability of hardware reset process for smart light emitting diode (LED) bulbs

A lamp including a body for containing a light engine that includes at least a first and second string of said light emitters. The lamp includes driver electronics including an AC-DC switching power supply section of a circuit including a first potentiometer for adjusting total current to the light engine; and a linear topology LED string current control section of the circuit including an operational amplifier controlled by a second potentiometer to operate a field effect transistor (FET) in the linear portion of the FETs operation range to adjust a percentage of the total current to the first and second string of the light emitters. Adjusting the total current adjusts the photosynthetic photon flux (PPF) of light emitted by the lamp. Adjusting the percentage of the total current to the first and second string of the light emitters adjusts the spectral power distribution of light being emitted by the lamp.

Multi channel electronic driver for plant growth

An apparatus for an LED lamp includes an optic device. At least one light engine wire is connected to the optic device and mounted at least partially external to the optic device. A base is engaged with the optic device. A driver is contained within the base. At least one contact is mounted on the driver in electrical communication with the driver, wherein the at least one contact is in non-engaged contact with the at least one light engine wire.

Apparatus and method of automated assembly of an LED lamp

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East Windsor, NJ, United States of America

Nilesh Patel