A CRT monitor is a type of computer monitor that uses a cathode ray tube to display images. CRT monitors are still used today, but they are gradually being replaced by LCD and LED monitors. CRT monitors are heavier and bulkier than their LCD and LED counterparts, and they consume more energy. However, they typically provide a sharper image than LCD and LED monitors.
CRT monitors work by firing electrons at a phosphor-coated screen. The phosphor glows when it is struck by the electrons, and this produces the images that you see on the screen. The intensity of the electron beam is varied to produce different levels of brightness, and the beam is scanned across the screen to produce the image. CRT monitors typically have a refresh rate of 60 Hz, which means that they can display up to 60 frames per second. Higher refresh rates are possible, but they typically result in a flicker that is visible to the human eye.
CRT monitors are available in a variety of sizes, from small desktop monitors to large-screen televisions. The size of the monitor is typically measured in inches, and the most common sizes are 15, 17, 19, 21, and 23 inches. The resolution of a CRT monitor is typically measured in pixels, and the most common resolutions are 640×480, 800×600, 1024×768, and 1280×1024. CRT monitors can also be used to display high-definition television signals.
LCD and LED monitors are gradually replacing CRT monitors because they are lighter, thinner, and more energy-efficient. LCD and LED monitors also have a higher refresh rate than CRT monitors, which means that they can display a smoother image. However, CRT monitors typically provide a sharper image than LCD and LED monitors.