The market size for high brightness (HB) LEDs is expected to reach $20.2 billion by 2015 - a CAGR of 30.6% from 2012 (according to Strategies Unlimited). One of the key application areas driving this significant growth factor are the LEDs used to backlight thin film transistor (TFT) liquid-crystal displays (LCDs). Applications range from high definition (HD) TVs and portable tablet PCs to automotive displays and a myriad of handheld communication devices. However, in order to maintain this impressive growth rate LEDs must not only offer enhanced reliability, reduced power consumption and more compact form factors, but they must also provide improvements in contrast ratios and color accuracy. Furthermore, in automotive, avionic and marine displays all of these improvements must be optimized while simultaneously being subjected to a wide array of ambient lighting conditions ranging from bright sunlight to moonless nights.
These TFT-LCD applications range from infotainment systems, gauge clusters and a wide array of instrument displays. Of course, backlighting these displays with LEDs creates some unique LED driver IC design challenges in order to optimize display readability across a myriad of lighting conditions. This requires LED drivers to offer very wide dimming ratios and high efficiency conversion while also withstanding the rigors of the demanding automotive electrical and physical environment. It goes without saying that these solutions must offer very low profile, compact footprints while simultaneously enhancing overall cost-effectiveness.
Moreover, according to LED inside, “phenomenal growth has been seen in the high lumen LED lighting system for commercial-use; this is because the LED lighting for household-use is still too expensive for most consumers. Backed by its long-term benefits, energy-saving and environment-friendly attributes, and its relevant tax reductions, there will be a substantial increase in the use of LED lighting in commercial spaces such as the parking lot, office space, factory facility and warehouse. LED lights can replace not only high pressure sodium lamps, halogen lights, incandescent bulbs but