LEDs ♦ news digest
Still, while life-cycle costs are attractive, the initial price of LED and OLED lighting is currently higher than the price of traditional lighting. These projects will help achieve significant cost reductions in manufacturing equipment and processes, while improving lighting quality and performance:
In one of the projects, Cree will receive a $2.3 million DOE investment is to develop a modular design for LED lights that can link together multiple units to fit larger areas. The design will also use less raw material, reducing manufacturing costs while ensuring high lighting quality and efficiency. Cree’s approach will design and manufacture the different components of an LED fixture -- including electrical, mechanical and optical systems – as one, seamless product, helping to further reduce assembly costs and ensure strong performance.
In the second project, Eaton Corporation will be awarded a $2.4 million grant. The Eaton project will develop an innovative manufacturing process that streamlines the LED fixture design and removes unnecessary materials and parts. With this approach, the LED chip can sit directly on the heatsink, improving heat transfer within the design and increasing LED efficiency.
Philips Lumileds will receive $1.8 million. Most LEDs are grown on a sapphire substrate. Through this project, Lumileds will develop an alternative to the standard flip-chip device that grows an LED face-down on the sapphire substrate. Before light can shine through, this substrate must be carefully etched off the device. The Lumileds device will treat the sapphire substrate so that removing the substrate is not necessary - reducing manufacturing costs without compromising lighting quality.
The project will also use standard grade glass, lowering costs while maintaining performance. Commercially- available and low-cost integrated substrates will help build a reliable, high-quality supply chain for this emerging industry.
This announcement represents the fourth round of Energy Department investments in solid-state lighting manufacturing projects since 2010 and supports broader Department efforts to accelerate domestic manufacturing and technical leadership in energy efficient technologies, helping to create jobs, boost exports and strengthen America’s role as a global leader in the clean energy race.
Remote control in operation with IR26-71C LED module (inset)
A height of just 1.2 mm allows the target devices to be as slim as possible, even when implemented into portables like mobile phones and tablets. With a radiant intensity of 5 mW/sr and 8 mW/sr or more at 20mA, they are claimed to outperform most SMD IRLEDs on the market.
The 8.0 mW/sr@20 mA version can match or exceed 5mm IR diodes. This allows either lower driving currents, to extend the battery lifetime of handheld devices, or increased panel sizes which lengthens the transmission distance of remote controls. A viewing angle of 50° ensures that the remote control does not need to be directly pointed towards the receiving device, but instead works in a wide operating range.
Based on a similar package design, Everlight is offering the IR26-61C IRLED series with a narrower viewing angle of 20° and the PT26-71B phototransistor series.
July 2013
www.compoundsemiconductor.net 79
Everlight IRLEDs power remote controls and touch panels
The 8.0 mW/sr@20 mA version can match or exceed 5mm IR diodes. This allows extended battery lifetime of handheld devices, or increased panel sizes
Everlight Electronics, a player in the global LED industry with three decades of experience in optoelectronics, has expanded its line of ‘invisible’ light sources.
The two new Surface Mount (SMD) infrared LEDs (IRLEDs), the IR26-71C and the IR26-61C, are suited for use in remote control applications.
The two IR26-71C models are 940 nm side-view devices that feature superior mechanical (height) and optical (radiant intensity and viewing angle) characteristics which make them ideal for use in remote controls as well as touch panels.
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