Philips Lumileds Lighting Company LLC

Soraa, Inc.

Lumileds Lighting U.s., LLC

Hewlett-packard Company

Koninklijke Philips Corporation N.v.

Lumileds LLC

Korrus, Inc.

Sorra, Inc.

Lumileds Holding B.v.

Frank Michael Steranka

Michael Ragan Krames

Michael David Camras

Troy A Trottier

John Julian Uebbing

Douglas W Pocius

Wayne L Snyder

Gerd O Mueller

Regina B Mueller-Mach

Robert C Taber

Christopher Haydn Lowery

Helena Ticha

Ladislav Tichy

William R Imler

Paul Scott Martin

John Edward Epler

Arpan Chakraborty

Daniel Alexander Steigerwald

Rafael Ignacio Aldaz

Steven Paolini

Matthijs Hendrik Keuper

Gloria E Hofler

Oscar Arturo Chao Pujol

Aurelien J F David

Nathan Fredrick Gardner

Oleg Borisovich Shchekin

Frank Tin Chung Shum

Patrick Nolan Grillot

Franklin J Wall, Jr

Dennis C DeFevere

Rafael Ignacio Aldaz Granell

Kevin Huang

Robertus G Alferink

Gerard Harbers

Stephen Andrew Stockman

Michael Joseph Ludowise

William D Houck, Ii

William Houck

Virginia M Robbins

Fred A Kish

R Scott West

Fred A Kish, Jr

Johannes Wilhelmus Weekamp

Clifford T Jue

Franklin Joseph Wall

Chin-Wang Tu

Seshasayee S Ankireddi

Li Zhang

Cheryl L McLeod

Steve Paolini

Jeff Kmetec

Rohit Modi

Rajarshi Saha

Frank S Wall, Jr

Dinesh C Shrimali

Cliff Jue

Frank J Wall, Jr

Michael R Krames

Frank J Wall

Johannes W Weekamp

An optical device includes a light source with at least two radiation sources, and at least two layers of wavelength-modifying materials excited by the radiation sources that emit radiation in at least two predetermined wavelengths. Embodiments include a first plurality of n radiation sources configured to emit radiation at a first wavelength. The first plurality of radiation sources are in proximity to a second plurality of m of radiation sources configured to emit radiation at a second wavelength, the second wavelength being shorter than the first wavelength. The ratio between m and n is predetermined. The disclosed optical device also comprises at least two wavelength converting layers such that a first wavelength converting layer is configured to absorb a portion of radiation emitted by the second radiation sources, and a second wavelength converting layer configured to absorb a portion of radiation emitted by the second radiation sources.

System and method for providing color light sources in proximity to predetermined wavelength conversion structures

Embodiments of the invention include a semiconductor light emitting device capable of emitting first light having a first peak wavelength and a semiconductor wavelength converting element capable of absorbing the first light and emitting second light having a second peak wavelength. The semiconductor wavelength converting element is attached to a support and disposed in a path of light emitted by the semiconductor light emitting device. The semiconductor wavelength converting element is patterned to include at least two first regions of semiconductor wavelength converting material and at least one second region without semiconductor wavelength converting material disposed between the at least two first regions.

Light emitting device having an optically pumped semiconductor wavelength converting element

Small LED sources with high brightness and high efficiency apparatus including the small LED sources and methods of using the small LED sources are disclosed.

Small LED source with high brightness and high efficiency

Wavelength converted light emitting device including a semiconductor wavelength converting material and a ceramic phosphor

Light emitting devices with improved light extraction efficiency are provided. The light emitting devices have a stack of layers including semiconductor layers comprising an active region. The stack is bonded to a transparent optical element.

Light emitting devices with optical elements and bonding layers

Techniques for fabricating and using arrays of violet-emitting LEDs coated with densely-packed-luminescent-material layers together with apparatus and method embodiments thereto are disclosed.

Dense-luminescent-materials-coated violet LEDs

Embodiments of the invention include a semiconductor light emitting device () capable of emitting first light having a first peak wavelength and a semiconductor wavelength converting element () capable of absorbing the first light and emitting second light having a second peak wavelength. The semiconductor wavelength converting element () is attached to a support () and disposed in a path of light emitted by the semiconductor light emitting device. The semiconductor wavelength converting element is patterned to include at least two first regions () of semiconductor wavelength converting material and at least one second region () without semiconductor wavelength converting material disposed between the at least two first regions.

Wavelength converted light emitting device

An LED lighting system powered by an AC power source comprising a rectifier module configured to provide a rectified output to a first group of LED devices and a second group of LED devices electrically coupled to the first group of LED devices. A current monitor module electrically coupled to the first group and to the second group of LED devices is configured to determine a first current level using a drawn current level signal associated with the first group of LED devices and a second current level using a reference current level signal associated with the second group of LED devices. The current monitor module is electrically coupled to a temperature sensing module that is configured to generate at least one compensation factor based at least in part on a temperature. The compensation factor is used to control (directly or indirectly) current through the LED devices.

High temperature LED system using an AC power source

An lighting source includes a driver for outputting electrical power in response to external electrical power, wherein the driver generates heat in response thereto, a lamp coupled to the driver, for outputting light in response to the electrical power, wherein the lamp generates heat in response thereto, a first heat sink physically coupled to the driver for receiving and dissipating heat there from, a second heat sink physically coupled to the light for receiving heat and dissipating heat there from, and an insulating portion disposed between the first heat sink and the second heat sink, wherein the insulating portion is configured to inhibit heat from the lamp from being transferred to the driver.

Illumination sources with thermally-isolated electronics

A device is provided with at least one light emitting device (LED) die mounted on a submount with an optical element subsequently thermally bonded to the LED die. The LED die is electrically coupled to the submount through contact bumps that have a higher temperature melting point than is used to thermally bond the optical element to the LED die. In one implementation, a single optical element is bonded to a plurality of LED dice that are mounted to the submount and the submount and the optical element have approximately the same coefficients of thermal expansion. Alternatively, a number of optical elements may be used. The optical element or LED die may be covered with a coating of wavelength converting material. In one implementation, the device is tested to determine the wavelengths produced and additional layers of the wavelength converting material are added until the desired wavelengths are produced.

Bonding an optical element to a light emitting device

Growing community of inventors

San Jose, CA, United States of America

Frank Michael Steranka