A computer monitor is an electronic device that displays information in visual form. It is usually connected to a computer system via a video cable. The most common types of computer monitors are those that use a cathode ray tube (CRT) or a liquid crystal display (LCD).
CRT monitors were the first type of monitors to be widely used. They work by firing electrons at a phosphor-coated screen. The phosphor glows when it is hit by the electrons, and this produces the images that are seen on the screen. LCD monitors work in a similar way, but instead of using a phosphor-coated screen, they use a liquid crystal display.
LCD monitors have many advantages over CRT monitors. They are much thinner and lighter, they use less power, and they produce less electromagnetic radiation. LCD monitors are also less likely to cause eye strain than CRT monitors.
Most computer monitors have a screen resolution of 1024×768 pixels. This means that the screen can display a maximum of 1024 horizontal pixels and 768 vertical pixels. Higher-resolution monitors are available, but they are more expensive.
Most monitors also have an aspect ratio of 4:3. This means that the width of the screen is four-thirds of the height. Widescreen monitors have an aspect ratio of 16:9. This means that the width of the screen is sixteen-ninths of the height. Widescreen monitors are becoming more popular, as they are better suited for watching movies and playing games.
Monitors are usually sold with a stand that allows the user to adjust the angle of the screen. Some monitors can also be mounted on a wall.
Most monitors have a number of input ports that can be used to connect the monitor to a computer. The most common input ports are DVI, HDMI, and VGA. DVI is the best quality input port, as it can carry a digital signal. HDMI is also a digital input port, but it is not as good quality as DVI. VGA is an analog input port, and it is not as good quality as DVI or HDMI.
Monitors also have a number of other ports, such as USB ports and audio ports. These ports can be used to connect the monitor to other devices, such as printers and speakers.
Monitors are available in a variety of sizes, from small screens that are less than 15 inches to large screens that are more than 30 inches. The size of the monitor is measured diagonally, from corner to corner.
The price of a monitor depends on a number of factors, such as the size of the screen, the resolution, the input ports, and the features. A basic 15-inch monitor can cost as little as $100, while a high-end 30-inch monitor can cost more than $1000.