Print  |  Send  |   

LED lighting searching for balance between efficacy and efficiency

September 29, 2011 // Christoph Hammerschmidt

LED lighting searching for balance between efficacy and efficiency

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

LEDs,Optoelectronics,LED Modules,LED lamps

Follow us

Fast, Accurate & Relevant for Design Engineers only!

Technical papers     

Linear video channel

READER OFFER

Read more

This month, Cherry is giving away five of its Energy Harvesting Evaluation kits, worth over 266 Euros each, for EETimes Europe's readers to win. Cherry's energy harvesting technology benefit mostly applications where a complex wire assembly and/or batteries would be inappropriate.

The required RF-energy is created by the mechanical actuation of the switch and the data is transmitted...

MORE INFO AND LAST MONTH' WINNERS...

Design centers     

Automotive
Infotainment Making HDTV in the car reliable and secure

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.

 

You must be logged in to view this page

Login here :