The surface-conduction electron-emitter display (SED) is a flat-panel, high-resolution display currently under development by Canon and Toshiba. It is expected to gain wide acceptance for use in television receivers. Some SEDs have a diagonal measurement exceeding one meter (approximately 40 inches), yet they consume only about 50 percent of the power of cathode-ray tube (CRT) displays, and 33 percent of the power of plasma displays having a comparable diagonal measurement.
The SED consists of an array of electron emitters and a layer of phosphor, separated by a small space from which all the air has been evacuated. Each electron emitter represents one pixel (picture element). The SED requires no electron-beam focusing, and operates at a much lower voltage than a CRT. The brightness and contrast compare favorably with high-end CRTs. Prototype electron emitters have been developed with diameters of a few nanometers (billionths of a meter). This leads some engineers to believe that SED technology can offer unprecedented image resolution. Consumer units are expected to be available in 2002.
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The SED consists of an array of electron emitters and a layer of phosphor, separated by a small space from which all the air has been evacuated. Each electron emitter represents one pixel (picture element). The SED requires no electron-beam focusing, and operates at a much lower voltage than a CRT. The brightness and contrast compare favorably with high-end CRTs. Prototype electron emitters have been developed with diameters of a few nanometers (billionths of a meter). This leads some engineers to believe that SED technology can offer unprecedented image resolution. Consumer units are expected to be available in 2002.
For more info, go to http://searchwin2000.techtarget.com/sDefinition/0,,sid1_gci797765,00.html