Output is data that has been processed into a useful form. That is, computers process data (Input) into information (Output). Users view or watch output on a screen, print it, or hear it through speakers, headphones, or ear buds. While working with a computer, a user encounters four basic types of output: text, graphics, audio, and video. Very often, a single form of output, such as Web page, includes more than one of these types of output.
An output device is any hardware component that conveys information to one or more people. Commonly used output devices include display devices, printers, speakers, headphones, and earbuds, data projectors, and interactive whiteboards.
Four types of output are text, graphics, audio, and videoDisplay Devices
A display device is an output device that visually conveys text, graphics, and video information. Desktop computers typically use a monitor as their display device. A monitor is a display device that is packaged as a separate peripheral. Some monitors have a tilt-and-swivel base that allows users to adjust the angle of the screen to minimize neck strain and reduce glare from overhead lighting. With some, you can rotate the screen. Adjustable monitor stands allow you to adjust the height of the monitor. Some have integrated speakers and or a built-in Web cam. Monitor controls permit users to adjust the brightness, contrast, positioning, height, and width of images. Most mobile computers and devices integrate the display and other components into the same physical case.
LCD Monitors and LCD Screens
An LCD monitor is a desktop monitor that uses a liquid crystal display to produce images. These monitors produce sharp, flicker-free images. LCD monitors have a small footprint, that is, they do not take up much desk space. Most are wide screen, which are wider than they are tall. You measure a monitor the same way you measure a television, that is diagnolly from one corner to another.
Plasma Monitors
A plasma monitor is a display device that use gas plasma technology, which sandwiches a layer of gas between two glass plates. Like LCD monitors, plasma monitors can hang directly on a wall.
A plasma monitor is a display device that use gas plasma technology, which sandwiches a layer of gas between two glass plates. Like LCD monitors, plasma monitors can hang directly on a wall.
Other Output Devices
In addition to monitors and printers, other output devices are available for specific uses and applications. These include speakers, headphones, and earbuds, data projectors, and interactive whiteborads.
Speakers, Headphones, and Earbuds
An audio output device is a component of a computer that produces music, speech or other sounds, such as beeps. Three commonly used audio output devices are speakers, headphones and earbuds.
Most personal computer and mobile devices have a small internal speakers that usually emits only low quality sound. Thus many users attach surround sound speakers or speaker systems to their computers to generate higher-quality sounds.
Most personal computer users attach high-quality surround sound speaker system to their computersData Projectors
A data projectors is a device that takes the next and images displaying on a computer screen and projects them on a larger screen so that an audience can see the image clearly. Some data projectors are large devices that attach to a ceiling or wall in an auditorium. Others, designed for the mobile users, are small portable devices that can be transported easily.
Data projectors can produce sharp, bright images
