Color Displays
Most new cellular phones released into the market are now equipped with color LCDscreens. Here's a quick look at the current crop of color LCDs:

STN (Super Twisted Nematic) LCD — Moderate in price and easy on power consumption. These displays have a low data-reaction rate that can cause an afterimage, making it difficult to view moving pictures and graphics or move quickly through the menu. STN LCDs are used mainly for low-priced color mobile phones. Displays 256 colors, 4,096 colors, and 65,000 colors.

TFT (Thin Film Transistor) LCD — These offer strikingly clear images and high data-reaction rates. TFT LCDs are also used for high-end products like laptop computers and LCD monitors. Their weak point is a high power consumption that can lead to a frequent battery recharge/exchange. Displays 4,096 colors, 65,000 colors, and 260,000 colors.

TFD (Thin Film Diode) LCD — An improvement over existing STN LCDs. TFD LCDs have the image quality and resolution equivalent to those of TFT LCD, and also offer relatively higher data-reaction rate. Power consumption is as low as the STN LCD, which makes battery recharge/exchange less frequent. Displays 65,000 colors.

OELD (Organic Electro Luminescence Display) — Unlike the existing displays, OELD has its own lighting elements without the need of a back light. Sporting a high data-reaction rate and low power consumption, it is considered the next-generation cellular phone LCD. However, compared to other displays, current OELD has a short lifespan, approximately 10,000 hours. Displays 1 color, 4 colors, and 256 colors.

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