2014-03-07

LED,GaN on silicon: A breakthrough technology for LED lighting,led panel light

LED,GaN on silicon: A breakthrough technology for LED lighting,led panel light
Date:2014/3/7 10:10:05
GaN on silicon: A breakthrough technology for LED lighting
With silicon-based LEDs overcoming issues such as lattice-mismatch and refractive-index problems, JOHN ELLIS, chief engineer at Plessey Semiconductors, predicts that the LEDindustry will move to take advantage of the lower-cost substrate used in the broad IC industry.
John Ellis, Plessey Semiconductors
Over the last decade, progress in light-emitting diode performance has been nothing less than phenomenal. LEDs today are performing at 50% wall plug efficiency, meaning that 50% of the applied power is emitted as light. Laboratory results are even higher in the high 60s; these results will become standard in due course. In the meantime, LED-based lighting is replacing incandescent, fluorescent, mercury, and sodium lamps in almost all applications. However, the uptake of LED lighting is still limited by the cost of producing LEDs like led panel light. This one remaining barrier will be addressed by developments in gallium-nitride-on-silicon (GaN-on-Si) technology.
Shuji Nakamura developed a method of growing thin GaN layers on sapphire substrates in the early 1990s, and up to now these have been the foundation of high-brightness blue LEDs. One notable competitor is silicon carbide (SiC), but these substrates are very expensive. While sapphire costs are dropping, silicon is a very common substrate in the semiconductor industry, and the costs are much lower than either sapphire or SiC.
Semiconductors of all types are characterized by the spacing between atoms in the crystal lattice. One difficulty with using silicon as a substrate is that the atoms are not spaced at the same distance as the atoms in a GaN layer. Growing GaN directly on silicon would lead to a mismatch that would cause strain, and this strain would be relieved only through sporadic dislocations that in turn cause leakage currents and general impairment of the performance of the LED.
The breakthrough needed for growing GaN on silicon was to use a buffer layer that offers a better match to the silicon lattice, and then to gradually transpose the buffer layer into GaN. This buffer technology forms the basis of new GaN-on-Si technology. In addition to the buffer layer, considerable optimization has been pursued to reduce residual dislocations, manage the residual strain, and optimize the quantum wells for high-performance LEDs.
GaN-on-Si also requires attention to optical properties. As a substrate, silicon is a good absorber of light — well demonstrated by the number of CMOS imaging chips and photodiodes currently available. The architecture of a highly-efficient LED must eliminate the losses that would occur if the light emitted from the quantum wells in the LED were allowed to enter the silicon.
One method of mitigating the problem is to put a mirror onto the top surface of the LED, transfer the LED and mirror onto a handle wafer, and remove the original substrate. The LED structure is thus turned upside down, and light generated in the junction is reflected upwards.
GaN also has a high refractive index, and as a result has a narrow escape cone with a half-angle of about 23°. Any light that propagates outside of this angle is totally internally reflected. A surface roughening scheme, however, creates a transmissive interface between GaN and air, effectively removing the total internal reflection (TIR) restriction. A lens can further enhance light extraction, increasing the escape cone and providing a refractive index that is closer to the GaN than air.
The techniques described here can deliver lower-cost, high-performance LEDs. The LED is measured in terms of internal quantum efficiency (IQE).
There are several techniques for measuring IQE. The most relevant measure is the overall electrical efficiency. In terms of current, there is a figure of merit that describes output power in terms of watts per unit of current in (W/A). Wall plug efficiency is another measure. The difference between the two is the forward voltage across the diode. Today we can achieve typical forward voltages of about 3.05V. IQE is approaching 60% and light extraction efficiencies are improving to greater than 70%.
Over the next 12 months GaN-on-Si LEDs will match the performance of GaN-on-sapphire LEDs, and offer a substantial price reduction. The move to a silicon substrate will help broaden and accelerate the market for LED-based lighting. from:http://www.ledsmagazine.com/

2014-03-07

Strategies in light exhibition in USA

Strategies in light exhibition in USA
Date:2014/3/7 10:19:39
BOOK NOW FOR 2015
We're moving to VEGAS!
FEBRUARY 24-26, 2015
Sands Expo & Convention Center
Las Vegas, NV USA

The most trusted name in LED and lighting events for over 15 years, Strategies in Light is the world’s largest exhibition designed to connect key suppliers and service providers with influential industry decision makers. Join 5,000 LED and lighting professionals for three days of face-to-face networking and benefit from unprecedented access to industry’s most anticipated platform for lead generation and new business development. With 85% onsite rebooking, space is selling fast! Book now to secure your prime location.
Benefit from access to more than 5,000 of the following professionals:
LED manufacturers
Suppliers of equipment and materials to the LED industry
LED system manufacturers
Lighting designers and architects
Automotive lighting suppliers
Lighting product manufacturers
Lighting system designers
Design engineers
LED product designers
Financial analysts, investment bankers, and venture capitalists
Corporate R&D staff
Luminaire manufacturers
Building owner/operators
Suppliers of LED manufacturing equipment
Suppliers of materials, chemicals and substrates for LED manufacturing
Test and measurement instrument producers
Financial analysts and investors

WHY EXHIBIT?
Strategies in Light is the perfect opportunity to increase your organization's visibility and participation with key decision makers who are involved in every aspect of the LED and lighting industry and are assessing the driving forces in the LED markets.
Sponsors and exhibitors will benefit from:
Cost-effective ROI. You need to go to only one event to meet global and key decision makers from the LED and lighting industry.
Market Review for the previous year and an updated five-year forecast. Strategies Unlimited, the recognized leader in LED, lighting and photonics market research, provides this vital information at the kickoff event of the year.
Insight on crucial business and technological issues from industry leaders. Get the information you need on the trends and technologies that are driving the LED and lighting industry from the foremost experts in the field.
Dynamic Networking Opportunities. Strategies in Light delivers a quality audience of senior level decision makers and is the ideal venue for developing new business partnerships as well as strengthening current client relationships.

2014-03-05

Poland LIGHT 2014 fair scope for LED luminaires

LIGHT 2014 fair scope for LED luminaires
Date:2014/3/5 11:13:03
Architectural lighting:
interior lighting
façade and objects illumination
controlling systems
Street, small architecture and signal lighting:
street lighting
post and lanterns
parking illumination
lighting for large civic areas and sport events
lighting in tunnels
park and garden lighting
neon and display lighting
signal lighting
light controlling and energy saving systems
equipment and accessories
Office and administrative building lighting:
lighting systems
lighting for working areas
general and point lighting
indirect lighting
lighting for schools and hospitals
lighting for hotels, restaurants and gastronomy
lighting for museums, cinemas, theatres and disco
light controlling systems
equipment and accessories
Housing and decorative lighting:
lighting for apartments
lighting for villas and houses
lighting for bathrooms, kitchens and resting areas
light controlling systems
Technical lighting for business and industry:
industrial areas illumination
general and working areas illumination
lighting systems
lighting in extreme conditions
lighting signal systems
protection lighting
machine lighting
Emergency and safety lighting
Specialized lighting:
lasers and fibre optics
special lighting effects
solar powered lighting
flashlights, torches and batteries
Christmas lighting
Lighting for scene, studio, club, discoteque and publicity
Light sources:
incandescent
tungsten-halogen
fluorescent
discharge: mercury, sodium, metal halide
special purpose light sources
Solid-state lighting:
LED luminaires
OLED luminaires
displays
LED applications
OLED applications
chips, modules
materials, Epi Wafer, printed circuit boards (PCB)
manufacture appliances
measurement appliances
power supply and controlling systems
optic systems
others
Lighting appliances for health and beauty care

Special sector for components and accessories:
lampshades, bowls, reflectors
grips, springs, gaskets, etc.
glassware, ceramics and stained glass
metal, plastic and wood components
lamp-sockets and nipples
sockets, transformers
cables
stabilizers, starters
circuit brakers, switches, dimmers
materials for lighting equipment production
colours and varnishes
lighting equipment production materials and machines
From www.www.lightfair.pl

2014-03-05

About led zone of 2014 Poland 22st International Trade Show of Lighting Equipment LIGHT 2014.

Trade Show LIGHT in Poland has an important sector dedicated to Solid-State Lighting together with a special conferences programme.

We are pleased to welcome all manufacturers of:

LED systems and end products
LED light-engines, modules & emitters
OLED light sources
Critical components, drivers & controllers
Optics & thermal management
Test equipments

With reference to the new EU regulations, Polish government supports sale of LED and LED products as well as OLED technology to lighting application from domestic to street & office lighting incl. high-definision displays, signals applications and automative lighting. Heightened awareness of energy efficiency and the environmental cost of using energy are creating very good conditions for Solid-State Lighting in Poland. Therefore, it is the best moment & a big opportunity and chance to gain Polish market and increase your sales.from http://www.lightfair.pl

2014-03-05

The International Fair of Lighting Equipment LIGHT

Agencja SOMA, company launched in 1995, is a specialized company with many years experience in organizing international fairs, exhibitions, conferences and facilitating B2B contacts between Polish companies and foreign partners. Agencja SOMA for nineteen years has been organizing international trade shows in Poland.

The flag event of Agencja SOMA is The International Fair of Lighting Equipment LIGHT which in 2013 will be held for the 21st time. This is the biggest lighting fair in Central and Eastern Europe. Range of presented products varies from architectural and decorative lighting, through light sources and components to lighting controlling systems. Trade Show LIGHT for years has been the place to meet wholesalers and distributors from Western, Central and Eastern Europe. Their participation in the trade show makes it one of the most important source of information about the lighting equipment for the industry. More information you will find on www.lightfair.pl

Parallel with International Fair LIGHT we organize International Fair of Electrical Fittings and Security Systems ELECTRICTY. Next year it will be held for the 11th time. Each year the exhibitors present more types of power energy devices: from generators and high voltage equipment, through monitoring and security systems to "intelligent building" systems and advanced technology equipment. Our presentation is addressed to institutions as well as to individual customers. Its topic is interesting to professionals managing power energy equipment, as well as to engineers, technicians and individual investors. More information you will find on www.elektroinstalacje.pl
CENERG 2013 is the Clean Energy Trade Show organized Parallel to LIGHT and ELECTRICITY.

2014-03-05

4th International LED professional Symposium +Expo Austria,lighting

4th International LED professional Symposium +Expo | LpS 2014 | Sept 30th - Oct 2nd, 2014 | Bregenz | Austria
It isn’t only the general lighting market that is being fundamentally changed by Solid State Lighting technologies; it’s the whole lighting industry. Predictions for the next five to seven years are that we’ll see more LED/OLED performance increases along with continuous price declines. The challenges of phasing out old technologies and ramping up new technologies are huge. Therefore, profitability is key to survival in this volatile environment.
LpS Event in Bregenz - Europe's foremost LED & OLED Lighting Technology EventLpS Event in Bregenz - Europe's foremost LED & OLED Lighting Technology Event
Exhibition
Exhibition
Sessions & Workshops
Sessions & Workshops
Technologies
Technologies
Dear Ladies & Gentlemen!
SEMICONDUCTOR LIGHT - MERGING TECHNOLOGIES and INDUSTRIES
It isn’t only the general lighting market that is being fundamentally changed by Solid State Lighting technologies; it’s the whole lighting industry. Predictions for the next five to seven years are that we’ll see more LED/OLED performance increases along with continuous price declines. The challenges of phasing out old technologies and ramping up new technologies are huge. Therefore, profitability is key to survival in this volatile environment.
“Merging” lighting with the fast and innovative semiconductor industry requires new processes, structures, partners, alliances and a new understanding of the lighting sector itself. Restructuring the lighting business to enable potentials for new, environmentally friendly lighting is required to make a substantial contribution to the world’s energy condition.
New and enhanced technologies are still the major innovation drivers in semiconductor lighting. Technologies are being increasingly merged on a sub-system level while diverse industries are intensifying their collaborations. But the key question remains: “What will the winning approaches be in the years to come”?
The LED professional Symposium +Expo is designed to outline background information and the latest trends while suggesting solutions to your engineering problems. There will be papers presented, workshops and tech-panels on the subjects of LEDs, OLEDs, optics, electronics, equipment, materials, reliability, standards, measurement, design and applications. Key global, leading service, component, module, manufacturing and distributor partners will all be present at the LpS 2013 EXPO.

A modern lighting installation in the newly opened vorarlberg museum in Bregenz will be presented on the first evening. On the second evening you will have the opportunity to network while cruising around Lake Constance on board the MS Vorarlberg.

The LpS 2014, Europe’s foremost LED lighting technology event, presents winning technology approaches and introduces you to the industry and research leaders who are important for building up your business opportunities.
The symposium and exhibition are located at the renowned Opera House and James Bond film location in Bregenz, on Lake Constance.
Every September this great holiday location is a meeting point for LED and OLED experts from all over the world. Welcome to the heart of Europe!
siegfried_luger

Siegfried Luger
Event Director - LpS 2014

Topics covered:
Evolution of LED lighting systems
Technologies for increased efficiencies of white LED systems
Technologies for mixing LED light
Reliability of LED lighting systems
Standardization & measurement of LED lighting systems
Design approaches & tools of LED lighting systems
Cost & production process improvements for LED lighting systems
Intellectual properties

System areas covered:
Light generation
Primary & secondary optics
Driver ICs
Lighting driver modules
Cooling devices
Substrate, packaging & connection devices & materials
Lighting control modules
Lighting design tools & configurators covering optics,
electronics & thermal components
Measurement & calibrating equipment
Production methodologies & manufacturing tools
Intellectual properties
How physiological data and facts from the field of natural science influence LED lighting technologies
from
4th International LED professional Symposium +Expo | LpS 2014 | Sept 30th - Oct 2nd, 2014 | Bregenz | Austria
It isn’t only the general lighting market that is being fundamentally changed by Solid State Lighting technologies; it’s the whole lighting industry. Predictions for the next five to seven years are that we’ll see more LED/OLED performance increases along with continuous price declines. The challenges of phasing out old technologies and ramping up new technologies are huge. Therefore, profitability is key to survival in this volatile environment.
LpS Event in Bregenz - Europe's foremost LED & OLED Lighting Technology EventLpS Event in Bregenz - Europe's foremost LED & OLED Lighting Technology Event
Exhibition
Exhibition
Sessions & Workshops
Sessions & Workshops
Technologies
Technologies
Dear Ladies & Gentlemen!
SEMICONDUCTOR LIGHT - MERGING TECHNOLOGIES and INDUSTRIES
It isn’t only the general lighting market that is being fundamentally changed by Solid State Lighting technologies; it’s the whole lighting industry. Predictions for the next five to seven years are that we’ll see more LED/OLED performance increases along with continuous price declines. The challenges of phasing out old technologies and ramping up new technologies are huge. Therefore, profitability is key to survival in this volatile environment.
“Merging” lighting with the fast and innovative semiconductor industry requires new processes, structures, partners, alliances and a new understanding of the lighting sector itself. Restructuring the lighting business to enable potentials for new, environmentally friendly lighting is required to make a substantial contribution to the world’s energy condition.
New and enhanced technologies are still the major innovation drivers in semiconductor lighting. Technologies are being increasingly merged on a sub-system level while diverse industries are intensifying their collaborations. But the key question remains: “What will the winning approaches be in the years to come”?
The LED professional Symposium +Expo is designed to outline background information and the latest trends while suggesting solutions to your engineering problems. There will be papers presented, workshops and tech-panels on the subjects of LEDs, OLEDs, optics, electronics, equipment, materials, reliability, standards, measurement, design and applications. Key global, leading service, component, module, manufacturing and distributor partners will all be present at the LpS 2013 EXPO.

2014-03-04

AwoX StriimLIGHT launth a LED light bulb can play music with Bluetooth speaker

AwoX StriimLIGHT launth a LED light bulb can play music with Bluetooth speaker
Date:2014/3/4 10:36:01
Bluetooth® music light

Stream music from your phone or computer anywhere in the home

Where to buy?
AwoX StriimLIGHT ™ is an energy-saving LED light-bulb with an integrated Bluetooth® speaker.
Just place it in any standard electrical lamp and use the "Play to" feature on your Bluetooth® -enabled music player to hear music wherever you want.
• Simple to use, with crisp and clear sound anywhere you can plug in a light bulb
• Plays audio right from your Bluetooth® music players, including computers and
numerous types of smartphones and tablets.
• Remote control for light on/off, sound volume setup and mute
• Bulb: LED, 110-240v, fits standard E27 socket
• Speaker : 10 Watts, 200Hz-20KHz

Stream from your Bluetooth® music player, smartphone or tablet to this 40W light bulb with its built-in 10 W speaker. Includes remote control for volume and light.www.greendyled.com