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Field emission electron sources have many attractive features. They have high brightness, are energy efficient as they require no heater, and may readily be fabricated into arrays. Field emission sources are now routinely used in high performance electron microscopes, but their largest potential application is in flat panel displays where rival technologies have difficulty matching the display quality...
Field emission displays (FED) are based on a large array of individually switched electron sources. A major problem in such displays is intra-pixel uniformity. In particular, the eye is very sensitive to variations in spot shape even if pixel intensities are uniform. A second problem lies in visually unacceptable charging artifacts from the spacers, required to support the vacuum envelope. Incorporating...
A novel type of emitter for a FED, the pFED is being developed for the past ten years. This emitter is formed from micron-sized silica coated with a nano-scale silica insulator. Of the commercially available graphites tested, the best performance was obtained from a 6 mum grade material. When printing such a material a coverage of ~15% cannot be exceeded without forming large clusters that disrupt...
We report the successful fabrication and testing of several 8x1 pixel test devices and several 32x32 pixel demonstrator devices consisting of spun-coated field electron emitting cathodes as an integral part of an addressable triode structure. The ink-based material is a vacuum compatible composite that can be inexpensively applied to large area glass substrates and encapsulated using conventional...
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