Advances in backlight technologies and techniques mean you can have more of your power budget to design with instead of write off. Most portable electronic products such as mobile phones, PDAs and navigation systems have small format LCD displays that need backlighting. Viewing high-resolution photos, video and Web pages has increased the utilization time of handset displays. The demand for high-quality displays is increasing in devices with media access. This creates reates challenges for backlight LEDs and also for the drivers. White backlight LEDs dominate the market, but the new RGB backlight will improve color saturation on displays. The keypad backlighting and other cosmetic lights are commonly used for personalizing mobile phones. There are different requirements for the display backlighting and keypad backlighting, and this affects the way these LEDs are driven.
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