aman.ppt

Output device An output device is an electronic machine device accepts data from a computer and transfer then into a from suitable for use outside world . Several output devices are available today . There are various type output devices:1. Monitors2. Printera) ot matri! printersb) "n#$et printersc) rum printersd)chain or band printerse) %aser printers&. Screen ima'e pro$ectors(. )oice response systemMonitorMonitors: are the most popular output device use today for produce soft copy output. They display the 'enerate output on television li#e screen.A monitor is associated usually with a #eyboard .Printers Printers are the most popular output devices used to day for producin' hard copy output. i*erent types of pointers are described below:a) ot matri! printers: dot matri! printers are character printers that print one character at a time . Theyform characters and all #inds of ima'es as patterns of dots.b) "n#$et printers: in#$et printers are characters and all #inds of ima'es drop on in# n a paper.c) rum printers: drum printers are line printers that print an entire line at a time d) +hain printers : chain printers are line printers that print one line at a time . "t consists of metallic chain on which all characters of the character set supported by the printer embossede) %aser printers: laser printers arepa'e printers that print one a'e at a time. Main comports of a laser printer are a laser beam source a multisided mirror , a photo conductive, drum and toner.Screen image projectorsScreen ima'e pro$ectors is a output devices used to pro$ect information from a computer on a lar'e screen so a 'roup of people can view it simultaneously .Voice Response Systems-ust as a speech reco'ntion system allows a user to tal# to a computer , a voice response system enables a computer to tal# to a user. )oice responsesystem has an audio response device that produce audio output.