Peripheral devices Output devices. Types of Output zOutput is data that has been processed into a useful form called information. yReport yComputer Graphics.

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Presentation transcript:

Peripheral devices Output devices

Types of Output zOutput is data that has been processed into a useful form called information. yReport yComputer Graphics yAudio Output yVideo Output

Types of Output zMost output can be divided into 2 categories: Soft copy & hard copy. ySoft copy is what you see on the monitor. Soft copy is temporary. yHard copy can be touched and carried. Hard copy is usually some form of paper output.

Monitors zA visual output device of a computer. zMonitor output is a most common form of soft copy. CRT Monitor Flat-panel Monitor

RGB Color zsimilar to a TV, use a cathode ray tube. zThis is one RGB pixel of light R + B = M (magenta) B + G = C (cyan) G + R = Y (yellow) R + G + B = W (white)

Resolution of Display zImages on the screen are created by configurations of dots called pixels (picture elements) zThe more the pixels, the better the resolution of the image oVGA (Video Graphics Array) = 640 x 480 pixels oSVGA (Super Video Graphics Array) = 800 x 600 pixels oXGA (Extended Graphics Array) = 1024 x 768 pixels

Printers zProduce permanent output (hard copy) zconsists of 2 main types: impact & nonimpact

Impact Printers zLine printers ythey can produce only text--no graphics. zChain printers zDot Matrix Printers yThe most common character printers create images by using a dot pattern.

Non-impact Printers zLaser Printer ywork in the same manner as copy machines; a laser beam creates electrical charges that attract toner to form an image and transfer it to paper. Color Laser Printer Laser Printer

zInkjet Printers ysignificantly less expensive than laser printers yrelatively low resolution yElectronically charged ink is sprayed through a jet nozzle and passed through an electronic field, which deflects the ink to form a dot-matrix character

Inkjet printer CMY color This is one CMY pixel of ink C + M = B (blue) M + Y = R (red) Y + C = G (green) C + M + Y = B (black)

Other Output Devices zPlotter yproduce high-quality line drawings yA continuous-curve plotter is used to draw maps from stored data.

zLCD Projectors yproject a computer image onto screen zVoice Output Devices ygenerate spoken words from text zComputer Output microfilm (COM) yrecords output as microscopic images on roll film. zFacsimile (FAX) Machine ytransmit & receives document over telephone line. zMultifunctional Devices (MFD) ycan print, copy and fax