Chapter 7 : Understanding Output

What is Output

• Output is data that has been processed into a useful form.
• An output device is any type of hardware component that conveys information to one or more people.

Display Devices

• A display device visually conveys text. graphics, and video information
• A monitor is packaged as a separate peripheral.
• Liquid crystal display (LCD) uses a liquid compound to present information on a display device.
• The quality of an LCD monitor or LCD screen depends primarily on: Resolution, Response time, Brightness, Dot pitch, Contrast ratio.
• Resolution is the number of horizontal and vertical pixels in a display device.
• Plasma monitors are display devices that use gas plasma technology and offer screen sizes up to 150 inches.
• HDTV is the most advanced form of digital television.
• A CRT monitor is a desktop monitor that contains a cathode-ray tube.

Printers

• A printer produces text and graphic on a physical medium.
• A non-impact printer forms characters and graphics on a piece of paper without actually striking the paper.
• An ink-jet printer forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper.
• A multi-function peripheral (MFP) is a single device that prints, scans, copies, and in some cases, faxes.
• A thermal printer generates images by pushing electrically heated pins against the heat-sensitive paper.
• A mobile printer is a small, lightweight, battery-powered printer that allows a mobile user to print from a, notebook computer, smart phone, or other mobile device.
• A label printer is a small printer that prints on adhesive-type material.
• Plotters used to produce high-quality drawings
• Large-format printers create photo-realistic quality color prints on larger scale

Speakers, Headphones, and Earbuds

• An audio output device produces music, speech, or other sounds.
• Headphones are speakers that cover of the ear.
• Earbuds (also called earphones) rest inside the ear canal.
• Some speakers are specifically designed to play audio from a portable media player.

Other Output Devices

• An interactive whiteboard is a touch-sensitive device, resembling a dry-erase board, that displays the image on a connected computer screen.