System-level approach yields optimized LED backlight design (MAGAZINE)

LEDs are quickly becoming the dominant backlight source for large displays, but design teams need to address thermal, power-management, dimming and other issues to yield an optimal design say Xiaoping Jin and Arkadiy Peker.

LEDs are very quickly becoming the LCD TV industry’s backlighting technology of choice, and are being incorporated into increasingly larger screen sizes. There seems little doubt that LEDs will be the mainstream light source in all LCD applications due to slim design, low power consumption and the fact that LEDs enable high display performance. System design teams must understand how to optimize LED backlight systems to win in what will surely be a competitive marketplace.

LCD TV system designers face many choices as they develop the next generation of LED-based panels. They must choose between direct-and edge-lit LED backlighting architecture, and select from a variety of dimming technologies, power management approaches and thermal protection techniques. They also must be concerned with accurate and stable color management, and how best to synchronize LED backlight control with video processors for implementation of D1, D2 and D3 backlight-addressing technologies. Moreover designers must choose the optimal LED backlight graphic user interface (GUI).

++++++

This article was published in the September/October 2010 issue of LEDs Magazine. To read the full version of this article, please visit our magazine page, where you can download FREE electronic PDF versions of all issues of LEDs Magazine. You can also request a print copy of LEDs Magazine (available by paid subscription) and sign up for our free weekly email newsletter.

More in Backlighting Signs & Displays