OUTPUT

• processed into useful form• 4 Types of Output:

• Text• Graphics• Audio• Video

• Devices – Hardware component that conveys information to one or more people

Display Devices

Output display that visually conveys text, graphics, and video information

2 Types of Display Devices Flat-panel Displays( LCD Monitors[uses a liquid crystal display to produce images])( LCD Screens[produce colour using either active –matrix or

passive matrix technology])( Plasma Monitors[display device that uses gas plasma technology

,which sandwiches a layer of gas between two glass plates)* LCD Technology-uses a liquids compound to present information

on a device.*LCD Quality-depends primarily on its resolution ,response

time,brightness,dot pitch ,and contrast ratio. CRT Monitors

Speaker, Headphones and Ear buds

Audio output device is a component of a computer that produces music, speech, and sounds.

Printer

Output device that produces text and graphics on a physical medium such as paper

3 Type of Printer Nonimpact Printers(forms characters and graphics on a piece of paper

without actually striking the paper) Ink-Jet Printers(forms characters and graphics by spraying tiny

drops of liquid ink onto a piece of paper ) Photo Printers(a colour printer that produces photo-lab-quality

pictures)

Printer ( cont )

Laser Printers(a high speed ,high –quality nonimpact printer

that operates in a manner similar to a copy machine,creating images using a laser beam and powdered ink,called toner

Thermal Printer(generates images by pushing electrically

heated pins against heat-sensitive paper) Mobile Printer(allows a mobile user to print from a notebook

computer or other mobile device)

Printer ( cont )

Label and Postage Printers(prints on an adhesive –type material that

can be placed on a variety of items ) Plotters and Large-Format Printers(sophisticated printers used to produce high-

quality drawing ) Impact Printers(forms characters and graphics on a piece of

paper by striking a mechanism against an linked ribbon that physically contacts the paper)

Other Output Devices

Data Projectors text and images displaying on a

(device that takes the computer screen and projects them onto a larger screen so that an audience can see the image clearly)

Interactive Whiteboards(a touch –sensitive device) Force-Feedback Game Controllers and

Tactile Output