1 / 25

Output

Output Thomas W. Davis What is Output? Output it data that has been processed into a useful form Output includes: Monitors Printers Speakers Etc. Basic Categories Text Graphics Audio Video Display Devices

emily
Download Presentation

Output

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Output Thomas W. Davis

  2. What is Output? • Output it data that has been processed into a useful form • Output includes: • Monitors • Printers • Speakers • Etc.

  3. Basic Categories • Text • Graphics • Audio • Video

  4. Display Devices • Display device: output device that visually conveys text, graphics, and video information • Information is referred to as a soft copy • Consist of a screen and the components that produce the information on the screen

  5. Monitor • Plastic or metal case that houses a display device as a separate peripheral • Most mobile computers and devices integrate the display and other components into the same physical case • Display may be color or monochrome

  6. CRT Monitors • A desktop monitor that is similar to a standard television because it contains a cathode-tube • A cathode-ray tube (CRT) is a large, sealed glass tube

  7. How the Display Works • The screen is made of dots of phosphor material • Each dot is made of red, green, and blue • Three dots combine to form a pixel • An electron beam moves back and forth across the back of the screen causing the dots to glow, producing an image

  8. Monitor Sizes • You measure monitor size diagonally from top left corner to bottom right corner • This is divided into viewable size and actual size • Determining the size of the monitor to purchase depends on the intended use

  9. CRT Monitor Ergonomics • Features that include: tilt-and-swivel base, brightness, contrast, positioning, height, and width controls • ENERGY STAR program • Encourages manufacturers to create energy efficient devices that use little energy when not in use

  10. Quality of a CRT Monitor • Depends on the resolution • Describes the sharpness and clearness of an image • Most monitors support a wide range or resolutions up to 1600 x 1200, with 800 x 600 the normal • Also depends on dot pitch and refresh rate

  11. Video Cards and CRT Monitors • Video card: converts digital output from the computer into an analog video signal and sends the signal through the cable to the monitor, which displays output on the screen

  12. Color Depth • The number of bits a video card uses to store information about each pixel • The greater the number of bits the better the image

  13. Flat-Panel Displays • Flat panel display is a display with a shallow depth that does not use CRT technology • Includes monitors, LCD displays, gas plasma displays and HDTV

  14. Flat-Panel Monitors • Also called an LCD monitor, is a desktop monitor that uses a liquid crystal display rather than a cathode-tube to produce images

  15. Advantages to a Flat-Screen • Take up less desk space, called footprint • Uses one-third the power of a CRT monitor • Produces less heat • Does not produce radiation

  16. LCD Technology • Liquid crystal display (LCD) uses a liquid compound to present information on a screen • Produce color using either passive-matrix or active-matrix technology • LCD quality is measured in the same manner as CRT display quality is measured

  17. Gas Plasma Displays • A display that uses gas plasma technology, which substitutes a layer of gas for the liquid crystal material in a flat panel monitor • When voltage is applied, the gas releases UV light causing pixels on the screen to glow

  18. Televisions and HDTV Displays • Digital televisions have two major advantages • Digital signals produce a higher-quality picture • Many programs can be broadcast on a single digital channel • HDTV: is the most advanced from of digital television

  19. Printers • A printer is an output device that produces text and graphics on a physical medium • Produce hard copies of data

  20. Impact Printers • Impact Printer: form characters and graphics by striking a mechanism against an inked ribbon that physically contacts the paper • Types: • DOT-MARTIX Printer • Line Printers

  21. Nonimpact Printers • Nonimpact printers: forms characters and graphics on a piece of paper without actually touching the paper • Types: • Ink-Jet • Photo Printers • Laser Printers • Thermal Printers • Portable Printers

  22. Speakers and Headsets • Audio output device: a component of a computer that produces music, speech or other sounds

  23. Faxes Machines and Fax Modems • Fax machine: short for facsimile machine, is a device that transmits and receives documents over telephone lines. • Fax modem: allows the user to send and receive electronic documents and faxes.

  24. Multifunction Perpheral • A single device that looks like a copy machine but provides the functionality of a printer, scanner, copy machine, and a fax machine

  25. Data Projectors • A device that takes the image from computer screen and projects it onto a larger screen • LCD Projector • Digital Light Processing Projector

More Related