Osram Sylvania Inc.

Ledvance Gmbh

Jason J Li

Arunava Dutta

Glenn Freeman

David M Hrubowchak

Janet Milliez

Anil Jeswani

Harold L Rothwell, Jr

Alan Lenef

Andrew Johnsen

Ravidasa Hegde

Raymond T Fleming

Randall D Brown

Harold Rothwell, Jr

Anne Janet Milliez

Richard C Laird

Nilesh S Patel

Masatoshi Honji

Alexander N Kasak

Heinz W Sell

Harold Rothwell

Jane Beasley

A light engine comprising a substantially tubular substrate including base portion with a plurality of slots, a first group of at least two filament LEDs on a first portion of the substantially tubular substrate, and a second group of at least two filament LEDs on a second portion of the substantially tubular substrate. Each of the first and second groups of the at least two filament LEDs being electrically connected through a base electrode to electrode contacts in the slots. The light engine also includes an electrical bus wire present proximate to the end of the substantially tubular substrate that is opposite the end at the base portion of the substantially tubular substrate, the electrical bus wire in contact with each filament LED for each of the first and second groups of at least two filament LEDs.

Light emitting diode filament light source

A light engine that includes electrical leads extending into a supporting stem and a filament assembly having a V-shaped geometry in electrical connection with the electrical leads. The filament assembly includes at least two light emitting diode (LED) filaments wherein a first end of the filament assembly is in electrical contact with the electrical leads and provides an apex portion of the V-shaped geometry, and a second end of the filament assembly opposite the first end has a second width greater than the first width of the apex portion. An electrically conductive pathway connects the at least two light emitting diode (LED) filaments at the second end of the filament assembly.

Light emitting diode filament lamp with V-geometry

A light emitting element control circuit and power supply for a solid state lamp includes an electrical control circuit controller which enables the operation of a solid state lamp in three distinct modes, which allows the user significant flexibility in operation of the lamp. It enables the user to operate the lamp with a fixed emission spectrum but with intensity control (Mode I); or with discrete settings of blue only or red only or a fixed ratio of the two (Mode II); or an on-demand ratio of blue to red emission whereby the user can operate the lamp with any arbitrary ratio of blue to red for example to meet different spectral requirements of, for example, different phases of plant growth (Mode III).

Method of control of power supply for solid-state lamp

A solid-state horticultural lamp is disclosed. The lamp emits a spectrum of light including a first local emission peak between 400-500 nm and a first spectral power distribution (SPD) intensity and a second local emission peak between 500-600 nm and a second SPD intensity, wherein the second SPD intensity normalized to the first SPD intensity is between 0.15-0.35. The spectrum further includes a third local emission peak between 600-700 nm and a third SPD intensity, wherein the third SPD intensity normalized to the first spectral power distribution intensity is between 2.4-2.8. In some cases, a photosynthetic photon flux (PPF) of the light between 600-700 nm is between 3.5-4.5 times a PPF of the light between 400-500 nm, and a PPF of the light between 600-700 nm is between 3.8-4.2 times a PPF of the light between 400-500 nm.

Solid-state horticultural lamp

LED lamp

An integral HID reflector lamp may be formed with an HID held in a reflector. An inner element is mechanically coupled to the reflector. The inner element is formed with a first mechanical coupling to mate with the reflector, a second mechanical coupling to mate with a circuit board, and an electrical coupling to at least electrically couple one of the leads to the circuit board. A circuit board has an edge mechanically coupled to the inner element and electrically connected to the leads by an electrical coupling on the inner element. A heat sink spans at least one side of the circuit board and forming an EMI shielding. An outer cover encloses the heat sink, circuit board, and inner element and coupled to the assembly of the reflector, HID lamp, inner element, and heat sink with each elements of the assembly clipped together.

Method of making an integral HID reflector lamp

Neck portion of a par lamp

A PAR lamp () has a body () with an internal reflector surface () disposed about a longitudinal axis (). A cavity () is provided at one end () of the body () and an arc discharge tube () that provides a substantially spherical light source is positioned in the cavity () and disposed on the longitudinal axis (). A cover receiving opening () is provided at a second end () of the body and a cover () closes the cover receiving opening (). A plurality of spiral facets () is formed on the internal reflector surface (), the plurality of spiral facets () being sufficient in number to increase the maximum beam candle power and decrease the beam angle when compared to faceted lamps having a lesser number of facets. The number of facets is equal to or greater than 75 and preferably is 100.

Faceted par lamp

A base-up incandescent lamp () includes a coiled-coil filament () that has a primary wire () and a secondary wire (), the primary wire () comprising an overwind that overlies the secondary wire () and provides a lower filament temperature and, therefore, less filament sag and a concomitant longer lamp life.

Lamp filament

Par type lamp

Growing community of inventors

Boxford, MA, United States of America

Jason J Li