chapter 6 output 2. display devices课件

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1、CHAPTER6outputDisplayDevices2WhatIsOutput?TextGraphicsAudioVideoOutput,Chapter534HardCopyvs.SoftCopyOutputHardCopy(PaperOutput)SoftCopy(MonitorDisplay)ElCentroCollege5Output:Monitors,Printers,Plotters,andVoiceMostoutputcanbedividedintotwocategories:SoftCopyandHardCopy.

2、Softcopyincludesoutputfrommonitorsandfromaudiodevices.Hardcopyoutputincludesoutputfromprinters,plotters,andmicrofilmandmicrofiche.6WhatareOutputDevices?Anycomputercomponentcapableofconveyinginformationtoauser7OutputDevicesAnycomputercomponentcapableofconveyinginformati

3、ontoauserOutputdevicesconvertmachinereadableinformationintopeople-readableform.Theoutputdevicesmostcommonlyusedwithmicrocomputersare:MonitorsPrintersPlottersVoice-OutputDevices8DisplayDevicesAnoutputdevicethatvisuallyconveystext,graphics,andvideoinformationCRTMonit

4、orsScreenhousedinaplasticormetalcaseColormonitor9TypesCRTFlat-screenResolutionPixelsSVGAorVGAMonochromeorcolorPIXELSRESOLUTIONOutputDevices=Monitors10Monitorscathoderaytube(CRT)liquidcrystaldisplay(LCD)LaptopcolorLCDdisplayDesktopcomputersuseaCRT11MonitorsMonitorsareal

5、socalled:displayscreensvideodisplayvideodisplayterminal(VDT).12MonitorsImagesarerepresentedonmonitorsbyindividualdotsor“pictureelements”calledpixels.Apixelisthesmallestunitonthescreenthatcanbeturnedonandofformadedifferentshades.13Pixels14Monitors(Continued)Thedensityof

6、thedotsdeterminethescreenresolutionwhichistheclarityoftheimagesonthescreen.Thegreaterthenumberofdotsonthescreen,thebettertheresolutionwillbe.Monitorsarecategorizedaccordingtoscreenresolutionaseitherhighresolutionorlowresolution.