LED lighting searching for balance between efficacy and efficiency
September 29, 2011 // Christoph Hammerschmidt
There are many challenges for the fledgling LED lighting industry - but the chanced far outweigh limiting factors, several speakers at the LED Lighting Symposium LpS in Bregenz said. The challenges vary depending on the position of the respective speaker in the value chain.
One of the major challenges for the LED lighting industry is that the value chain currently is undergoing a reorganization process. Luminary manufactures need to acquire a number of new competencies, said Gerhard Kuhn, head of Osram Semiconductor's application team. "Luminary vendors need to add competencies in thermal management, electrical design and standards handling", he said in his keynote speech at the LpS. "A bad optical or thermal design or a poor driver can dramatically decrease the design of a LED lamp," Kuhn noted. As a consequence, the efficiency needs to be regarded not as a topic of the LED module alone, but of the entire product. "Efficiency needs to be optimized along the entire value chain", Kuhn demanded.
With LED lighting applications being field a wide open field where the designer's creativity can find ample chances to unfold, the differentiation at the market will be done by a new set of product features: Reliability, LED properties and power consumption, Kuhn predicted.
On a technical level, the indoor lighting application market is determined by the conflict between CCT (Correlated Color Temperature) versus CRI (Color Rendering Index). LED designers have to find the right trade-off between light quality and efficiency, between efficacy and efficiency.
In outdoor illumination applications, other factors are more in the foreground. In the first place, energy saving is the predominant driver for LED lighting success. But factors such as service lifetime, reliability and stability should not be underestimated either, Kuhn said. Reliability, in turn, is determined in the designers ability to master the influence of temperature, humidity and corrosive gases - after all, outdoor lighting in most cases is street lighting and as such exposed to the exhaust gases from cars. he provided an example, how this considerations influence LED lighting designers: "Silver corrodes very fast under these conditions, so designers should make sure they don't use silver in the reflectors of outdoor LEDs," Kuhn explained.
In this context, there are however many parameters for LED semiconductor vendors to optimize their products. It also becomes visible that there are cultural gaps to close along the value chain. "We can help luminary manufacturers to establish more expertise", Kuhn promised. "We try to learn their language."All news
Cutting down on personal data leaks
August 22, 2014
Now may be the right time to cut down on smartphone data leaks and reclaim a little bit of privacy, according to Yves-Alexandre ...
Great chances and risks for sensor industry in shale gas exploration
Tools out of the 3D printer conquer car production
Trinamic's stepper motor package gets you started
Webinar: Printed circuit board test and in line automation
Apple, Samsung tablet sales decline
August 21, 2014
Global tablet shipments grew 5 percent year on year to reach 52.4 million units in 2Q14, according to market analysis company ...
MCU market on a rebound, says analyst
Is free-space wireless charging viable? Dialog thinks itís worth a try
Schaeffler to boost electromobility by Formula E commitment
- Building Blocks for the Internet of Things
- New Linear Regulators Solve Old Problems
- Testing GPS with a Simulator
- DSM presents: Select the best plastic for DDR4
InterviewCEO interview: Tronics' Langlois makes moves in MEMS
Pascal Langlois has been CEO at Tronics for nine months. He discusses plans for the company and directions for the complex and diverse MEMS technology sector.
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, Altium Ltd is offering EETimes Europe's readers the chance to win one TASKING VX-Toolset for ARM Cortex-M Premium Edition, normally licensed for 2.395 Euros, for ultra-rapid prototyping and code development around ARM Cortex-M based microcontrollers.
The VX-toolset for ARM is the first TASKING compiler suite to receive the Software Platform technology, which is seamlessly...Read more
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.