Wednesday, July 6, 2011

LED drivers and light sensors enable compelling displays

LED-based display backlighting continues to be the largest market for high-brightness LEDs despite the fact that the general-illumination application gets more notice. New LED driver and sensor products promise to enable displays with the latest solid-state-lighting (SSL) technology for optimal image quality and minimal power consumption.

Indeed light and proximity sensing is needed in devices based on LCDs to set the appropriate backlight level for maximum display quality without wasting power whe
n ambient light is sufficient or when no one is present to view the display. Companies are targeting mobile devices such as smartphones and tablets, although they also expects the sensors to be used in computer-display and HDTV applications.

To serve in mobile applications, the sensors must work in very bright environments and the new products are designed for use in full sunlight at levels to 60,000 lx and beyond. “Mobile device vendors are continually striving to deliver more compelling products with an improved user experience; therefore, they demand ALS and proximity detection solutions capable of operating in a very wide range of lighting conditions".

The sensors work with any type of light source including fluorescent and at virtually any lighting level. Moreover the dual-diode architecture can provide accurate results even when mounted behind glass that can distort the spectrum.

The LED driver market is certainly a significant one as Strategies Unlimited details in a new report on the LED driver market segment. A research firm projects that driver sales will grow to $3.5 billion by 2015 from $2 billion in 2010.

It confirms that display-backlight applications will dominate the market through 2015. But the firm expects general-lighting to be the next major market mover for LEDs and associated technology such as drivers.

Source: LEDs Magazine

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