news digest ♦ LEDs
Synthetic sapphire is a critical building block for LED light manufacturing, high performance glass for mobile devices, silicon-on-sapphire (SOS) semiconductor substrates, military grade windows, and other applications.
“At ARC Energy, we strive to provide our customers with innovative, efficient furnaces for large diameter 6” sapphire,” says Rick Schwerdtfeger, co-founder and chief technology officer for ARC Energy. “By partnering with Elmet, we feel secure knowing our customers have access to quality crucibles and furnace components manufactured to the highest standards in the industry.”
“The market for synthetic sapphire is increasing rapidly, and Elmet is continually investing to support the growing demand for sapphire crucibles and precision-formed furnace components,” explains Sandeep Jain, senior VP of sales and marketing for Elmet. “We have unique capabilities on which the sapphire industry can capitalise to keep up with the demand for their products.”
Headquartered in Nashua, N.H., the Advanced RenewableEnergy Company, LLC (ARC Energy), was founded in 2007 to commercialise cutting-edge technologies for LED and other clean energy markets.
Established in 1929, Elmet is a global supplier of high performance materials with a specialisation in molybdenum and tungsten.
With 400,000 square-feet at three manufacturing sites in Maine, Georgia, and China, Elmet produces mill, machined, and fabricated products for sapphire growth, FPD manufacturing, medical imaging, high temperature furnace, and many other industries.
Osram`s IR LED sensor simplifies smartphone design
The digital SFH 7776 sensor contains a GaAs (gallium arsenide) based infrared LED and two detectors. It registers the ambient brightness in order to control the display backlighting and also deactivates the touch function on the display as soon as you hold a phone up to your ear
Osram Opto Semiconductors has expanded its portfolio of proximity and ambient light sensors with an extremely powerful version with low power consumption.
The compact SFH 7776 sensor registers the ambient brightness even behind dark smartphone covers and prevents unintentional responses from the touch screen
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www.compoundsemiconductor.net June 2013
The SFH 7776 combined proximity and ambient light sensor
The digital SFH 7776 sensor contains a GaAs based infrared LED (IRED) and two detectors and performs two different functions. It registers the ambient brightness in order to control the display backlighting so that it can always be easily read but consumes as little power as possible.
It also deactivates the touch function on the display as soon as you hold the phone up to your ear during a phone call. To do this the sensor emits infrared light that is reflected by approaching objects, such as your ear.
With a working range of up to 16 centimetres and its small size, the SFH 7776 has been designed specifically for use in smartphones and other mobile devices. Thanks to the excellent sensitivity of the detector the component does not need lenses to bundle the emitted infrared light. As a result, it has an impressively small height of only 1.35 millimetres. With its black casing the sensor is virtually invisible even behind transparent phone covers. Its low power consumption is also an important factor in terms of its suitability for mobile devices – in standby mode it only needs 0.8 mA.
Behind dark covers
The SFH 7776 is extremely sensitive to ambient light. With a detection limit of 0.002 lux (lx) it can even be used behind dark casing panels. Designers can place the sensor anywhere and do not need a special translucent window.
“The SFH 777x series gives our customers a complete family of multifunctional sensors for an extremely wide range of phone covers,” says Dirk Sossenheimer, responsible for intelligent sensor applications at Osram Opto Semiconductors.
What’s more, the SFH 7776 is designed so that the ambient light sensor doesn´t react to short-term fluctuations in the brightness of various lamp types,
during telephone calls. This makes it even easier for smartphone designers to control the backlighting and touch functions of displays.
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