Grade 8.  Pixel – Tiny dots that make up a picture shown on a monitor.  Resolution – How sharp and clear an image is. Usual measured by the amount of.

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Presentation transcript:

Grade 8

 Pixel – Tiny dots that make up a picture shown on a monitor.  Resolution – How sharp and clear an image is. Usual measured by the amount of pixels.  Refresh rate – The frequency with which pixels that make up a picture is recharged.

 A device that sends information from the computer to the user.  Two categories of output devices. Output Devices SoftcopyHardcopy

CRT – Cathode Ray Tube LCD - Liquid Crystal Display

 Non Impact Printer – Transfers image by heat or b drawing.  Impact Printer – Transfers image by using the print head to strike the paper.

DOT MATRIX

INKJET PRINTER

LASER PRINTER

PLOTTER