Cathode Ray Tube
CRT is the acronym for Cathode Ray Tube.
A type of vacuum tube used in older electronic devices, including televisions, computer monitors, oscilloscopes, and radar displays. The CRT works by firing a stream of electrons from an electron gun at a phosphorescent screen, causing it to emit light and create an image.
In a CRT, the electron gun is located at the rear of the tube, and a series of deflection coils around the neck of the tube control the path of the electron beam, scanning it across the screen in a pattern known as a raster. The colors of the image are created by combining different intensities of red, green, and blue phosphors on the screen.
CRTs were once the primary technology used in televisions and computer monitors, but they have largely been replaced by flat panel displays, such as LCD, LED, and OLED, which are thinner, lighter, and more energy-efficient. However, CRTs are still used in some specialized applications, such as medical imaging, and are valued for their high contrast, deep blacks, and lack of motion blur.
- Abbreviation: CRT