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Output By: Vanessa Snyder Definition : Data that has been processed in the form of information Types : Text Characters that makeup words and sentences Graphical Image Digital representation of information that is not text Audio Enhance understanding through sound Video

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output

Output

By: Vanessa Snyder

what is output
Definition:

Data that has been processed in the form of information

Types:

Text

Characters that makeup words and sentences

Graphical Image

Digital representation of information that is not text

Audio

Enhance understanding through sound

Video

Full-motion images

What is Output?

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

display devices
Definition:

Output device that conveys graphics, text and video information

Soft Copy is information that is displayed on a display device

Basic Parts:

Screen

Definition:

Projection surface

Monitor

Definition:

Plastic or metal case that houses the screen

Display Devices:

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

display devices continued
Display Devices Continued…
  • Monochrome:
    • Definition:
      • Information is displayed on one color and on a different colored background
  • Gray Scaling:
    • Definition:
      • Information is displayed using many shades of gray from white all the way to black.
        • This provides better contrast

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

types of monitors
Types of Monitors:
  • CRT Monitors
  • LCD Monitors
  • Gas Plasma Monitors

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

crt monitors
Definition:

A monitor that contains a cathode ray tube

Cathode ray tube (thus, CRT) is a large, sealed, glass tube

Every dot on the screen consists of phosphor material

There is a red, a green and a blue phosphor

Basic Terminology:

Viewable Size:

Diagonal measurement of the actual viewing area that is provided by the monitor

Pixel:

Short for picture element

Single point in an electronic image

CRT Monitors:

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

lcd monitors
LCD Monitors:
  • Liquid Crystal Display (thus LCD) contains liquid crystals instead of a cathode ray tube.
  • Flat-Panel Display has a lightweight, compact screen
    • Consumes one-third the power of a CRT

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

lcd displays
LCD Displays:
  • Web-enabled device:
    • Provides access to the web and/or e-mail
  • Electronic book (e-book):
    • Compact computer that allows you to “mark” text
      • ClearType
        • Technology developed to make on-screen reading as natural feeling as possible

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

lcd displays continued
LCD Displays Continued…
  • Use:
    • Active-matrix display, a.k.a. thin-film transistor display (TFT), which can use a separate transistor for each color pixel.
      • Organic TFT, a.k.a. organic LED (OLED), uses organic molecules to produce a brighter display
      • This is the most powerful because many transistors are used
    • Passive-matrix display, a.k.a. dual-scan display, requires less power and uses fewer transistors
      • High-performance addressing (HPA) provides a less expensive alternative.

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

gas plasma monitors
Gas Plasma Monitors:
  • Definition:
    • Flat-panel display that uses gas plasma technology
      • Offers larger screen sizes and higher display quality

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

quality of display devices
Quality of CRT depends on:

Resolution

Dot pitch

A.k.a. pixel pitch; the distance between each pixel on the display

Refresh rate

A.k.a. vertical frequency/scan rate; speed that the monitor redraws the images on the screen

Measured in hertz (number of times per second that the screen is redrawn)

Quality of LCD depends on:

Resolution

Sharpness and clearness of an image

Super Video Graphics Array (SVGA) supports resolutions and colors

Quality of Display Devices:

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

monitor ergonomics
Monitor Ergonomics:
  • Goal:
    • To incorporate comfort, efficiency and safety
  • Electrostatic radiation (EMR)
    • Magnetic field that travels at the speed of light
      • Complies with MPR II standards
        • LCD monitors do not emit any kind of electromagnetic radiation—only CRT monitors do
  • ENERGY STAR program:
    • Program that encourages manufacturers to create energy-efficient devices

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

printers
Printers:
  • Definition:
    • Output device that produces text and other graphics on a medium which is known as a hard copy or a printout
  • Orientations:
    • Portrait
    • Landscape

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

printers continued
Printers Continued…
  • Types:
    • Impact Printers
    • Nonimpact Printers
    • Photo Printers
    • Label and Postage Printers
    • Portable Printers
    • Plotters and Large-Format Printers

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

printers continued15
Printers Continued…
  • Impact Printers:
    • Strikes a mechanism against an ink ribbon
      • Different qualities of print:
        • Letter Quality
        • Near Letter Quality
    • Dot-Matrix Printers
      • Tiny pins on a print head mechanism strike an inked ribbon
      • Use continuous-form paper in which each sheet of paper is connected
    • Line Printers
      • High-speed impact printer that prints an entire line at a time
      • Shuttle-matrix printer moves a series of print hammers back and forth horizontally at high speeds

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

printers continued16
Nonimpact Printers:

Forms characters and graphics without actually striking the paper

Types:

Ink-Jet Printers:

Forms characters by spraying tiny drops of ink

Laser Printers:

High-quality nonimpact printer that uses individual sheets of paper stored in a removable tray that slides into the printer case

Page Description Language (PDL) tells the printer how to lay out the material

* PCL (Printer Control Language) supports standard

fonts and layouts

* PostScript is designed for complex documents

Thermal Printers:

Generates images by pushing electronically heated pins against heat-sensitive paper

Thermal wax-transfer printer, a.k.a. thermal transfer printer, uses heat to melt colored wax on heat-sensitive paper

Dye-sublimation printer, a.k.a. thermal dye transfer printer, uses heat to transfer color dye to specially coated paper.

Printers Continued…

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

printers continued17
Printers Continued…
  • Photo Printer
    • Color printer that can produce graphical images on mediums
  • Label and Postage Printer:
    • Small printer that contains an adhesive material

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

printers continued18
Printers Continued…
  • Portable Printers
    • Small, lightweight printer that allows mobile users to print from a handheld or notebook while traveling
  • Plotters and Large-Format Printers
    • Sophisticated printers that produce high quality drawings
      • Large-format printer creates realistic quality prints

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

speakers and headsets
Speakers and Headsets:
  • Audio Output Devices that produce sound
    • Two common uses are:
      • Speakers:
        • Generate sound
          • Woofer, a.k.a. subwoofer, boosts low sounds
      • Headsets:
        • Allows the individual to hear the generated sound

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

other output devices
Other Output Devices:
  • Data Projectors:
    • Device that takes the image from a computer screen and projects it to a larger screen
      • LCD Projectors use liquid crystal technology and uses a light source to display the information on a computer screen
      • Digital light processing (DLP) Projector use tiny mirrors to reflect light

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

other output devices continued
Other Output Devices Continued…
  • Facsimile (fax) machine:
    • A device that transmits and receives documents over telephone lines
      • Fax modem is a modem that also allows an individual to send and receive electronic documents as faxes
  • Multifunction Devices (MFD):
    • A single piece of equipment that looks like a copy machine but is also a printer
      • Multifunctional Peripherals (MFPs), a.k.a. all-in-one devices, vary widely in function

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

terminal
Terminal:
  • Definition:
    • A device that performs both input and output because it consists of a monitor, keyboard and video card, which is also called a graphics card because it converts digital output from the computer into an analog video signal
      • There are three categories of terminals:
        • Dumb terminals
        • Intelligent terminals
        • Special-purpose terminals

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

terminals continued
Terminals Continued…
  • Dumb terminal:
    • No processing power; thus, not an independent device
  • Intelligent terminal a.k.a. programmable:
    • This contains both memory and a processor in addition to the monitor and keyboard
    • Can perform some functions independent of the host computer
  • Special-purpose terminal:
    • Perform specific tasks and contain features for a particular industry

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

terminals continued24
Terminals Continued…
  • Special-purpose terminal:
    • Point-of-sale (POS) terminal records purchases
    • Automated teller machine (ATM) is a self-serving banking machine that connects to a host computer through a network
      • Personal Identification (PIN) allows an individual to access of his or her savings account.

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

output devices for physically challenged users
Output Devices for Physically Challenged Users
  • Size of color of the text can be changed for the challenged
  • The blind can utilize the voice output
  • Braille Printer
    • Outputs information in Braille

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

conclusion
Conclusion:
  • Data, unprocessed facts, is organized into information that can be broken down into input and output.
    • The data can be further broken down into more specific parts ranging from projectors to multifunctional devices and so on.

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

the end
THE END

* Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

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