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LED Backlight
However, there are several challenges with LED backlights. Good uniformity is harder to achieve especially as the LEDs age with each LED possibly aging at a different rate. Also the use of three separate light sources for red, green, and blue means that the white point of the display can move as the LEDs age at different rates. Power efficiency also can be a challenge. Though it is possible for an LED display to be more power efficient, this is not a given and many first generation implementations may use the same or more power than their CCFL counterparts.
The usage of LED backlights on notebook computers has been growing. Sony has used LED backlights on some of its higher end slim VAIO notebooks since 2005. Fujitsu introduced notebooks with LED backlights in 2006. In 2007, Asus, Dell, and Apple introduced LED backlights into some of their notebook models. As of 2008[update], Lenovo has also announced LED-backlit notebooks, and other companies like HP will also be marketing LED-backlit notebooks in the near future. In October 2008, Apple announced it will be using LED backlights for its entire notebook lineup, and for its new 24-inch Apple Cinema Display.
HP claims its LED backlit laptop displays are thinner and lighter than traditional screens, require less energy, do not use mercury and save 10% energy (measured in battery life).
Reference Sources: LED Backlight : Wikipedia
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