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Understanding Output Devices: Printers, Monitors, and Enhanced Multimedia Technology

Explore the essential functionalities of various output devices, including laser printers, inkjet printers, and plotters, which cater to diverse printing needs with high-quality results. Learn about the capabilities of monitors, such as CRT, LCD, and TFT technologies, emphasizing resolution and display quality. Discover the significance of enhanced sound output with sound cards and the role of graphics cards in improving multimedia experiences. This chapter highlights the costs, speeds, and resolution metrics vital for effective computing in both personal and professional settings.

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Understanding Output Devices: Printers, Monitors, and Enhanced Multimedia Technology

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  1. COMPUTER STUDIESStandard Grade OUTPUT DEVICES Chapter 17 Computing

  2. Drum Flatbed FOUNDATION PRINTERS Laser Printer • High quality printouts - can be in colour or B&W. • Many pages can be printed very quickly. • Toner is used to display the image on paper. Inkjet Printer • Colour printouts • Excellent photograph quality • Slower to print but less expensive • Uses ink cartridges • Plotter • Colour pens move up & down • Used with CAD packages Computing

  3. CRT Ergonomic monitor Monitors / VDUs • A computer video signal is received then the image is displayed on a screen • More pixels per inch means a higher resolution • A high resolution monitor displays high quality images FOUNDATION Computing

  4. MONITOR / VDU LCD: LIQUID CRYSTAL DISPLAY • CRT: CATHODE RAY TUBE • Inside the flat end is coated with substances which glow when hit by electrons • The coating has red, green & blue dots which glow to produce the colours needed • Transistors charge liquid crystals between two glass plates. • Fluorescent tubes provide the light source, which passes through a layer of crystals. • Varying the electrical charge to the crystals creates images. GENERAL Computing

  5. MONITOR / VDU continued TFT: THIN FILM TRANSISTOR • LCD TFT monitors emit less radiations than a Standard LCD. • AND emit MUCH less radiation than a CRT monitor! • TFT also gives a picture up to an 80 degree angle. • where as a LCD only goes to about a 45 degree. • TFT also gives a sharper picture. GENERAL Computing

  6. Comparing Printers • Capital Costs • Determined by the quality of hardware bought • e.g. laser or inkjet printer? CRT or LCD monitor • Running costs • Determined by what is used to operate the hardware • e.g. printer paper amount & quality, ink or toner? • Speed • How many pages are printed per minute (ppm) • Resolution • Determined by how many pixels or dots are present in each inch (dots per inch - dpi) Computing GENERAL

  7. SPEECH SYNTHESISER Press a key to hear the word spoken for the picture VR Headset / VR Visor Goggles for video Headphones for sound CREDIT Specialised Output devices for Disabled users Virtual Reality output Computing

  8. HIGH QUALITY VDU NEEDED FOR ANIMATION & MOVIE OUTPUT Multimedia Projector White Board HIGH QUALITY SOUND OUTPUT HIGH QUALITY SCREEN DISPLAY Speakers Headphones CREDIT MULTIMEDIA Computing

  9. Graphics Card IMPROVES SOUND QUALITY OF GAMES & MULTIMEDIA APPLICATIONS VGA (CRT) output ViVo (video in/video out) DVI (Digital Output) CONTROLS THE QUALITY OF OUTPUT ON A MONITOR Sound Card Multimedia continued CREDIT Computing

  10. And there are more…. Exciting chapters to follow So tune in again next time Computing

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