Hewlett-Packard Company

Prysm, Inc.

Agilent Technologies, Inc.

Philips Lumileds Lighting Company LLC

Other

Lumileds LLC

Quarkstar LLC

Lumileds Lighting U.s., LLC

Koninklijke Philips Corporation N.v.

Aptina Imaging Corporation

Avago Technologies Ecbu IP (Singapore) Pte. Ltd.

John Julian Uebbing

Frank Michael Steranka

Michael Ragan Krames

Roger A Hajjar

Michael David Camras

Gerd O Mueller

Regina B Mueller-Mach

Troy A Trottier

Robert C Taber

Phillip H Malyak

Christopher Haydn Lowery

Wayne L Snyder

Douglas W Pocius

David L Kent

Gloria E Hofler

Dale W Schroeder

Sergey A Bukesov

Amit Jain

David Kindler

John L Ritter

Brian Massey

Roland H Haitz

Alan Claude Burroughs

Mark A Pajdowski

Shane Harrah

Donald Krall

Dennis C DeFevere

Virginia M Robbins

Thomas Fajardo

Jerry D Kreger

Trevor J Smith

Fred A Kish, Jr

Julie Elizabeth Fouquet

Stefano Schiaffino

Rickson Sun

Stephan Hengstler

Kenneth D Scholz

Gregory G Cappiello

Thomas J Lugaresi

Howard C Epstein

James T McCann

William D Collins

Max Safai

John M Watson

Steven Paolini

Peter H Mahowald

Yew Tai Chieng

Tyler Sims

David Pitou

Fred A Kish

Perry Jeung

Donald L Lubin

Donald A Shipley

A variety of light-emitting devices are disclosed that are configured to manipulate light provided by one or more light-emitting elements (LEEs). In general, a light-emitting device includes one or more light-emitting elements (LEEs) disposed on a base surface that are configured to emit light, a first optical element having a first surface spaced apart from the LEEs and positioned to receive light from the LEEs, a transparent second optical coupled to the first optical element, and a reflector element adjacent the second optical element arranged to reflect a portion of light output from the second optical element.

Light-emitting device with light guide for two way illumination

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

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 lens having a refractive index for light emitted by the active region preferably greater than about 1.5, more preferably greater than about 1.8. A method of bonding a transparent lens to a light emitting device having a stack of layers including semiconductor layers comprising an active region includes elevating a temperature of the lens and the stack and applying a pressure to press the lens and the stack together. Bonding a high refractive index lens to a light emitting device improves the light extraction efficiency of the light emitting device by reducing loss due to total internal reflection. Advantageously, this improvement can be achieved without the use of an encapsulant.

Light emitting devices with improved light extraction efficiency

Scanning beam display systems using fluorescent screens and various servo feedback control mechanisms to control display imaging qualities.

Servo-assisted scanning beam display systems using fluorescent screens

A device includes a light emitting structure and a wavelength conversion member comprising a semiconductor. The light emitting structure is bonded to the wavelength conversion member. In some embodiments, the light emitting structure is bonded to the wavelength conversion member with an inorganic bonding material. In some embodiments, the light emitting structure is bonded to the wavelength conversion member with a bonding material having an index of refraction greater than 1.5.

Methods and systems for improving imaging quality and power efficiency of scanning beam display systems using fluorescent screens are disclosed. In various embodiments, beam shaping mechanisms for maximizing overlap between the beam cross-section and the florescent element corresponding to each color sub-pixel of the screen, as well as pulse width and timing adjustments, are introduced to reduce imaging noise and improve power efficiency of the display system.

Fluorescent screens and display systems and devices based on such screens using at least one excitation optical beam to excite one or more fluorescent materials on a screen which emit light to form images. The fluorescent materials may include phosphor materials and non-phosphor materials such as quantum dots.

Multilayered fluorescent screens for scanning beam display systems

Scanning beam display systems based on scanning light on a fluorescent screen. The screen can include fluorescent materials which emit visible light under excitation of the scanning light to form images with the emitted visible light. Multiple lasers can be used to simultaneously scan multiple laser beams to illuminate the screen for enhanced display brightness. For example, the multiple laser beams can illuminate one screen segment at a time and sequentially scan multiple screen segments to complete a full screen.

Optical designs for scanning beam display systems using fluorescent screens

Scanning beam systems, apparatus and techniques in optical post-objective designs with two beam scanners for display and other applications.

Post-objective scanning beam systems

A process for forming electrical contacts for a semiconductor light emitting apparatus is disclosed. The light emitting apparatus has a first layer of first conductivity type, an active layer for generating light overlying the first layer, and a second layer of second conductivity type overlying the active layer. The process involves forming at least a first and a second elongate electrical contact through the second layer and the active layer to provide electrical connection to the first layer, the first and second contacts oriented at an angle to each other, the first contact having a first end in proximity with the second contact, the first end being sufficiently spaced apart from the second contact such that when current is supplied to the first layer through the contacts, current contributions from the first end of the first contact and the second contact in an area generally between the first end and the second contact cause a current density in the area that is approximately equal to a current density elsewhere along the first and second contacts.

Electrical contacts for a semiconductor light emitting apparatus

Growing community of inventors

Palo Alto, CA, United States of America

John Julian Uebbing