Field Emission Display (FED) Monitors

Field Emission Display monitors

1. What it is?

A field emission display (FED) is a new type of flat-panel display in which electron emitters, arranged in a grid, are individually controlled by "cold" cathodes to generate colored light. Field emission display technology makes possible the thin panel of today's liquid crystal displays (LCD), offers a wider field-of-view, provides the high image quality of today's cathode ray tube (CRT) displays, and requires less power than today's CRT displays.

http://searchcio-midmarket.techtarget.com/sDefinition/0,,sid183_gci213960,00.html, August 7, 2009

2. What is it for?

Field emission display (FED) technology has been proposed as a display technology that enjoys the advantages of allowing for wide viewing angles as well as being thin and light weight. The field emission display has the advantage of high image quality found with the conventional cathode ray tube display.

Other advantages: high yield, fast reacting time, good performance in displaying coordination, having high brightness, light and thin structure, wide range of color temperature, high mobile efficiency, excellent distinguishability of tilted direction, etc.

In addition to the better brightness, the viewing angle is broader, power consumption is lower, response speed is faster, and the operation temperature range is larger. Through the construction of a high efficiency fluorescent film, the field emission display provides outstanding brightness performance even outdoors so it is thought as a quite competitive display panel and is even likely to replace the liquid crystal display. Field emission devices are used in a number of different applications, including displays, e-beam lithography, chemical analysis and space propulsion.

http://www.electronics-manufacturers.com/info/monitors-and-displays/fed-display.html, August 7, 2009

3. What does it look like?

http://www.gizmag.com/pictures/relevant/9635_14070883805.jpg , August 7, 2009

4. What is the technology behind it?

FEDs capitalize on the well-established cathode-anode-phosphor technology built into full-sized CRTs using this in combination with the dot matrix cellular construction of LCDs. Instead of using a single bulky tube, FEDs use tiny "mini tubes" for each pixel, and the display can be built in approximately the same size as an LCD screen.

Each red, green and blue sub-pixel is effectively a miniature vacuum tube. A FED pixel cell has thousands of sharp cathode points, or nanocones, at its rear. These are made from material such as molybdenum, from which electrons can be pulled very easily by a voltage difference, to strike red, green and blue phosphors at the front of the cell. Colour is displayed by "field sequential colour". The display will show all the green information first, then redraw the screen with red followed by blue.

http://www.pctechguide.com/43FlatPanels_FEDs.htm, August 7, 2009