Thursday, June 17, 2004
Flat panel displays
A nice, simple article describing pros and cons between plasma and LCD screens:
Flat-Panel TVs: Time to Go Skinny?
For example:
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Flat-Panel TVs: Time to Go Skinny?
For example:
- Plasma screens initially seem to be the better deal because they offer the best bang for the buck on the showroom floor. Today, $3000 will get you either a 30-inch LCD or a much larger 42-inch plasma TV. But a number of issues with plasma technology make the screens a poor fit for consumers, warns Jon Peddie, principal of Jon Peddie Research in Tiburon, California.
"They look great when they're new. It's a fantastic experience when you see one," Peddie says. But he warns: "The screen is hot, expensive, and noisy. It burns in; it wears out. For all those reasons, I don't think plasma is an appropriate solution for the home."
The difference between the two technologies is in the way LCD and plasma displays work. LCD screens employ millions of individual crystals, each of which responds to an electric charge to allow a specific amount and color of light to pass through the glass. Plasma screens use millions of tiny glass bubbles filled with a gas-like substance called plasma. When exposed to an electric charge, the plasma emits ultraviolet rays that cause the coating on the glass to glow the appropriate color. The problem is, the coating wears out over time.
That issue hit home for Enderle when he received a 30-inch LCD TV from Gateway to evaluate. Enderle had been quite happy with his three-year-old plasma TV--until he looked at it next to the LCD model.
"That's what really showed me how badly the plasma had degraded," Enderle recalls. "The LCD looked so much better. The funny thing is, the plasma degrades slowly over time so you don't even notice it."
LCD screens are immune to screen burn in and fade, which means they offer a significantly longer useful life than their plasma counterparts. In fact, the buttons and other components on LCD TVs are likely to fail before the screen itself does. Another advantage: LCD panels consume about half the power and produce much less heat than plasma displays. That means LCD TVs don't have to incorporate noisy fans to move cool air through the unit--a real problem with many plasma displays.
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