Innovative LED geometry could increase light output by factor of ten
July 13, 2012 // Christoph Hammerschmidt
New three-dimensional assembly of LEDs could dramatically multiply the light output compared to today's planar devices, European scientists hope. The EU research project GECCO aims at vertically oriented LEDs with much higher efficiency.
Already now, modern high-performance LEDs provide a bright light output at high efficiency and are meanwhile applied for automobile headlights, for example. At present, the production process for these kinds of LEDs is still not cost efficient enough and also the efficiency of these LEDs needs further improvement.
The international team of the GECCO project with their partners from Madrid, Bristol, Lodz, as well as LED manufacturer Osram is working on achieving their ambitious objectives.
Up to now, LEDs are being constructed in a planar way, meaning in layers and completely flat. The more light is being required, the more wafer area has to be produced - an expensive and laborious approach. The idea of the GECCO project is to assemble LEDs in a three-dimensional way so that actually every LED consists of a 'light emitting tower' from which the entire vertical surface is emitting light. Obviously the surface of the tower is much larger compared to the ground area of a planar LED. And in fact, it is exactly the gain of light emitting area that leads to a higher light output.
Thus, the manufacturing of an LED becomes much more cost-effective and as a result replacing ancient electric bulbs, halogen lamps as well as energy saving bulbs to LEDs is getting significantly more profitable. Considering the fact that currently 20% of electrical energy worldwide is being utilized for illumination, this innovation provides an enormous potential as far as cost-effectiveness is concerned. In addition, LED lighting is particularly important for future electric mobility. Energy saving is of utmost importance in electric cars.
The dimensions of the 'light emitting towers' are within the micrometer range. This means approximately one million LEDs fit on an area of one square millimeter. This process requires utmost precision which can only be achieved by applying nanotechnology manufacturing techniques.
The GECCO project is coordinated by Prof. Andreas Waag from the Institute of Semiconductor Technology of the Braunschweig Technical University.
ADCs for high dynamic range – successive-approximation or sigma-delta?
September 01, 2014
Maithil Pachchigar, an applications engineer with Analog Devices Inc., looks at trade-offs that must be considered when choosing ...
Microchip in Pursuit of CSR
Samsung Funds III-V FinFETs in US Lab
A question of Europe
Trinamic's stepper motor package gets you started
Winged parcel delivery: Google's way
August 29, 2014
While there is still debate about if legislation would ever allow swarms of commercial drones to fly over our heads, Google ...
Two-inch Super AMOLED display fits Samsung smartwatch plans
UK armed forces consider lithium sulfur batteries
Small cell market to hit $4.8 billion in five years
- Power Modules: The New Super Power
- Flexible Performance for Network Security Appliances
- Digital Power Management Reduces Energy Costs While Improving System Performance
- Using RF Recording Techniques to Resolve Interference Problems
InterviewA question of Europe
Sir Peter Bonfield sits on the board and has advisory roles in many international companies and universities. With more than 45 years of experience in electronics, computers and communications, here he ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Trinamic Motion Control is offering you to win one of four TMCM-1043 development kits for its highly integrated, NEMA 17-compatible TMCM-1043 stepDancer stepper motor module.
Offering designers an easy-to-use PC-based GUI that allows one-click modification of motor drive current, micro-stepping and other key parameters, the intuitive kits are custom designed and developed for...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.