Philips Lumileds Lighting Company LLC

Koninklijke Philips Corporation N.v.

Tectus Corporation

Lumileds Lighting U.s., LLC

Lumileds LLC

Other

Philips Lighting Holding B.v.

Koninklijke Philips Electronics N.v.

Philips Lumileds Lighting, LLC

Lumileds Lighting Company LLC

Lumileds Holding B.v.

Paul Scott Martin

Grigoriy Basin

Michael Ragan Krames

Daniel Alexander Steigerwald

Robert Scott West

John Edward Epler

Michael David Camras

Kwong-Hin Henry Choy

Gerard Harbers

Fred A Kish, Jr

Gerd O Mueller

Frank Michael Steranka

Regina B Mueller-Mach

Michael West Wiemer

R Scott Kern

Hui Ling Pan

Sze Kuang Lee

Stefano Schiaffino

Brian Elliot Lemoff

Werner K Goetz

Jin Cherl Kwon

Chao Ding

Frans Hubert Konijn

Chihping Kuo

Ewelina Natalia Lucow

Stein Kuiper

Yu-Chen Shen

Drew Daniel Perkins

Stephen Andrew Stockman

Matthijs Hendrik Keuper

Michael Joseph Ludowise

Tun Sein Tan

Douglas W Pocius

Serge Laurent Rudaz

Changhua Chen

Michael Frank Deering

Ion E Opris

Frederic Stephane Diana

Steven D Lester

Decai Sun

Jerome Chandra Bhat

Benno Spinger

Gregory David Miller

Renaldi Winoto

Rafael Ignacio Aldaz

Kuochou Tai

Pascal Jean Henri Bloemen

Franklin J Wall, Jr

Tewe Hiepke Heemstra

Hui Pan

Franklin Joseph Wall

Helena Ticha

Ladislav Tichy

Albrecht Johannes Kraus

William R Imler

Willem Hendrik Smits

Carrie Carter Coman

Hiu Tung Chu

Robert F M Hendriks

Cresente S Elpedes

Gina L Christenson

R Scott West

Hansong Zhang

Chunheng Kang

Ashim Shatil Haque

Long Yin

Nan Chen

Fred A Kish

Sidney X Shore

Jianzhong Pan

Zainul Fiteri Bin Aziz

Henry Choy

Mari Holcomb

Han Ho Choi

Naamah Argaman

Tomonari Ishikawa

Stefan Eberle

Steven A Maranowski

Robert M Fletcher

Tigran Nshanian

Arnold Daguio

Boris Kharas

William Freeman

Yasumasa Morita

Tze-Sen Lim

Ching-hui Chen

Xiaoping Chen, Legal Representative

Mihai-Costin Manolescu

Luke Cheng

Nachiket Raghunath Raravikar

Dong Pan

Marcus Johannes Gerardus Elzinga

Kyle J Thomas

Leifang Shi

Xiaofang Mo

Hua Sin Daniel Yew

Lucymarie Mantese

Maciej Benedict

Dima Simonian

Kwong-Him Henry Choy

Color conversion layers, methods of making color conversion layers, monolithic color, micro-light-emitting diode displays and methods of making monolithic, color, micro-light-emitting diode displays are disclosed.

Quantum dot layer for color, micro-led displays

High-density GaN-based LED displays fabricated using wafer-to-wafer hybrid bonding and incorporating s color conversion region are disclosed.

LED displays fabricated using hybrid bonding

Advanced display devices are integrated into glasses so that they look and feel more like normal glasses. They are based on pupil replication using multiple, small projectors. A number of projectors are embedded in the eyeglasses, for example embedded in the rim of the eyeglasses or in a periphery of the lens. The projectors generate (partial) images based on a common image to be displayed to the user. These images are optically coupled through the lens, for example using waveguide coupling, to different display windows in the lens. The display windows couple the images out of the lens and towards the user's eye.

Eyeglass-integrated display device using multiple embedded projectors and display windows

A display is created using 'smart pixels.' A smart pixel is a pixel of a display that integrates the pixel pipeline as part of the pixel, rather than using separate integrated circuits. A smart pixel may be based on an integrated stack that includes light emitting elements, an external data contact for receiving digital data for that pixel, and also the pixel pipeline from the digital data to the light emitting elements.

Display pixels with integrated pipeline

Additional 'auxiliary' bumps are used to stabilize alignment and reduce slippage of dense arrays of interconnect bumps on opposing die during a bonding process. One example of auxiliary bumps are interdigitated bumps. Interdigitated bumps are more self-aligning and laterally stable because bumps do not meet head-to-head. Rather, the head of a bump on one die falls into the space between bumps on the other die. Another example of auxiliary bumps are nail bumps. In nail bumps, one bump is harder (the nail) and 'drives' into the opposing softer bump during bonding. This constrains the lateral movement of the two bumps relative to each other and reduces lateral slippage. In some embodiments, the auxiliary bumps and interconnect bumps are formed in the same process, and also bonded in the same process.

Bonding ultra-dense bump arrays using alignment bumps

The present invention relates to the field of automotive lamps, particularly a method for manufacturing a light emitting device () for use in automotive lamps. The method comprises: providing a base substrate () with a LED die () and one or more electrical components () attached thereon into a first mold; melting and injecting an optical transparent material over the LED die () to form an optical structure (); removing the base substrate () from the first mold once the optical transparent material is partially solidified; providing the base substrate () into a second mold different from the first mold; and melting and injecting a thermally conductive material into the second mold while the optical transparent material is not fully solidified, such that an intimate connection is formed between the thermally conductive material and the optical transparent material. The present invention further discloses the light emitting device () per se.

Light emitting device and manufacturing method thereof

In one approach, an LED array uses a combination of a half cavity and straight reflective sidewalls to improve the power distribution so that more light falls within the collection angle of the projection optics. From the bottom upwards, the LEDs in the array include a reflector, a thinner p-layer and a thicker n-layer. An active region (such as quantum wells) between the p-layer and the p-layer generates light. Without additional structures, the generated light would have an isotropic distribution and not much of the light would fall within the collection angle of the projection optics. However, the bottom reflector and p-layer form a half cavity for the light emitted from the active region. This alters the angular power distribution. Straight reflective sidewalls extending from the active region upwards into the n-layer further reflect light from the altered power distribution into the collection angle of the projection optics.

Ultra-dense array of LEDs with half cavities and reflective sidewalls, and hybrid bonding methods

A lighting assembly is disclosed which includes a leadframe and at least one light-emitting diode (LED) element arranged on the leadframe. At least a portion of the leadframe is covered with a polyurethane coating arranged to electrically insulate the portion of the leadframe, and at least a portion of the polyurethane covered portion of the leadframe is further covered with a thermally conductive material. A method for manufacturing the lighting assembly is also disclosed.

Lighting assembly and method for manufacturing a lighting assembly

Ultra-dense array of LEDs with half cavities and reflective sidewalls, and manufacturing methods

Ultra-dense array of LEDs with half cavities and reflective sidewalls

Quantum dot-based color converters having a high density of sub-pixels. The sub-pixels have a high density of quantum dots that provide for high conversion efficiency within small sub-pixel aspect ratios and small volumes. The color converter can be used in optical displays.

Ultra-dense quantum dot color converters

A small projector uses an ultra-dense array of gallium nitride (GaN) LEDs. However, epitaxial growth of GaN typically produces a GaN region that is 5 um or thicker. To achieve high pixel density, the LEDs have small area, so the resulting LED structures are tall and skinny. This is undesirable because it makes further processing more difficult and has higher optical losses. As a result, it is beneficial to reduce the thickness of the GaN region. In one approach, a wafer with the GaN region on substrate is bonded to a backplane wafer containing LED driver circuits. The substrate is then separated from the GaN region, exposing a buffer layer of the GaN region. The GaN region is thinned and then patterned into individual LEDs. Typically, the buffer layer is removed entirely.

Ultra-dense LED projector using thinned gallium nitride

A multi-stage lamination process is used to laminate a wavelength conversion film to a transparent substrate, and subsequently to a light emitting element. The wavelength conversion film may be an uncured phosphor-embedded silicone polymer, and the lamination process includes heating the polymer so that it adheres to the transparent substrate, but is not fully cured. The phosphor-laminated transparent substrate is sliced/diced and the wavelength conversion film of each diced substrate is placed upon each light emitting element. The semi-cured wavelength conversion film is then laminated to the light emitting element via heating, consequently curing the phosphor film. Throughout the process, no glue is used, and the optical losses associated with glue material are not introduced.

Glueless light emitting device with phosphor converter

A system controls a brightness of an augmented reality (AR) eye-mounted device. The system includes an eye-mounted display, a photodetector system, and a controller. The eye-mounted display includes a contact lens and a femtoprojector. The femtoprojector is contained in the contact lens and is configured to project an AR image to a user's retina. The AR image is overlaid on an external scene viewed by the user through the contact lens. The photodetector system detects a brightness level of the external scene. Based on the brightness level of the external scene, the controller adjusts a brightness level of the AR image projected to the user's retina. In some embodiments, the eye-mounted display receives image data defining the AR image and the controller adjusts a bit depth of the image data based on the brightness level of the AR image.

Brightness control for an augmented reality eye-mounted display

Growing community of inventors

Pleasanton, CA, United States of America

Paul Scott Martin