cold cathode ray tube

A cold cathode ray tube (CRT) is a device that displays images by using electricity to excite gases or electrons without heating its cathode. Unlike traditional CRTs that heat a filament to produce electrons, cold cathode tubes generate electrons directly through electrical discharge in gases or solid materials. When electrons are released, they are directed by electric and magnetic fields to illuminate phosphor-coated screens, creating visible images. These tubes are used in specialized applications like neon signs, scientific instruments, and certain display equipment, leveraging their ability to produce bright, high-contrast visuals without the need for a heated filament.