Microsoft Office Tutorials and References
In Depth Information
Display Devices
Display Devices
A display device is an output device that visually conveys text, graphics, and video information. A monitor is a display
device that is packaged as a separate peripheral. A widely used monitor is an LCD monitor. The LCD monitor shown in
Figure 15 uses a liquid crystal display to produce images on the
screen. The surface of the screen of an LCD monitor is com-
posed of individual picture elements called pixels . Resolution
is the number of horizontal and vertical pixels in a display
device. For example, a screen set to a resolution of 1440 3 900
pixels displays up to 1440 pixels per horizontal row and 900
pixels per vertical row, for a total of 1,296,000 pixels to create a
screen image. A higher resolution provides a smoother, sharper,
clearer image.
Mobile computers such as notebook computers, including
netbooks and Tablet PCs, and mobile devices such as smart
phones, portable media players, PDAs, handheld game
consoles, and digital cameras, have built-in LCD screens
(Figure 16).
Figure 15 The LCD monitor is widely used
with desktop computers.
notebook computer
smart phone
portable media player
digital camera
handheld game console
Figure 16 Notebook computers, PDAs, smart phones, handheld game consoles, portable media players, and digital cameras
have color LCD screens.
Storage Devices
A storage device is the computer hardware that records and/or retrieves items to and from storage
media. A storage medium (media is the plural) is the physical material on which a computer keeps
data, instructions, and information. Three common types of storage media are hard disks, flash
memory, and optical discs.
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