Just a decade ago flat panel computer monitors were an oddity & the least expensive models went for over the cost of standard PC but these days the flat panel monitor is all over the place. Prices have come down in the last0 years as well, & new technologies are coming in to the market. The latest is the LED Sign monitor. As with any new know-how it can be confusing at first. Like identical cars with different engines, basically taking a look at the side by side doesn't immediately tell us a whole lot of knowledge. A flat panel looks like a flat panel. The difference is under the hood.
LCD displays work by having a miniature fluorescent tube light bulb behind a liquid crystal screen, usually at the top although sometimes at the bottom or both. The liquid crystal display can change color, but does not give off any light. The light they see comes from the fluorescent bulbs shining through the LCD itself as the matrix changes color. This works well but has a few drawbacks, the most immediately obvious is that it is impossible to display black. Because there's or fluorescent bulbs lighting the whole screen the only way an LCD can display black is to change the pixels to opaque, therefore blocking the light. Some LCDs are more successful at this than others, but all except the latest screens will obviously look dark grey or charcoal when the screen is on, but displaying black. This is all right for most makes use of, but for watching movies or video gambling the imperfect black levels can be frustrating.
LED display work similarly to LCDs, except in lieu of having fluorescent bulbs there's lots of Light Emitting Diodes behind the screen. These LEDs require tiny electricity, & ones that are not needed (if a portion of the screen is displaying black) can be turned off. Overall, this means LED screens use about 40% less electricity than their already efficient LCD counterparts. It also means LED screens have superior black levels. The LEDs also take up less space than the tiny fluorescent bulbs so the screens are noticeably thinner, & lighter. Finally, lots of people have noted that tiny amounts of mercury is used in the manufacturing of traditional LCDs (for the fluorescent bulbs) & this is not the case with LED screens.
Currently LED screens cost about 50% over an LCD screen of the same size, but there's positive advantages & no drawbacks to the new know-how other than the increased cost tag.
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LED Display Sign And Electronic