Electron-injected fluorescent displays (EIDs) typically use a barium-tungsten cathode as the electron emission source. EID is a display technology that uses electron beams injected onto phosphors to generate visible light to display images. The barium tungsten cathode is a key component in the EID, and the electron beam it produces is used to excite fluorescent substances to produce images. This technology is used in some low-power, high-contrast and high-resolution displays.
The following are examples of applications of barium tungsten cathodes in electron injection fluorescent displays (EID):
Electron emission source: Barium tungsten cathode is used as electron emission source in EID to generate electron beam. These electrons are accelerated by an electric field and injected onto the fluorescent material, causing the fluorescent material to emit light, thereby producing an image.
High Brightness and Contrast Ratio: The barium tungsten cathode can generate high-energy electron beams, which excite fluorescent substances to produce bright luminous spots. This enables EID to achieve high brightness and high contrast display.
Fast response time: Because the electron beam generated by the barium-tungsten cathode has high energy, it can quickly excite the fluorescent material, so that the EID can achieve a fast response time, which is suitable for dynamic image display.
High resolution: The electron beam generated by the barium-tungsten cathode can be precisely controlled, and high-resolution display can be realized on small-sized pixels.
Low Power Consumption: EIDs typically have low power consumption compared to traditional LCD displays, thanks to the efficient emission of electron beams generated by the barium tungsten cathode.
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