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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 l.jpg

Output

By: Vanessa Snyder


What is output l.jpg

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 l.jpg

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 l.jpg
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 l.jpg
Types of Monitors:

  • CRT Monitors

  • LCD Monitors

  • Gas Plasma Monitors

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


Crt monitors l.jpg

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 l.jpg
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 l.jpg
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 l.jpg
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 l.jpg
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 l.jpg

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 l.jpg
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 l.jpg
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 l.jpg
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 l.jpg
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 l.jpg

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 l.jpg
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 l.jpg
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 l.jpg
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 l.jpg
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 l.jpg
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 l.jpg
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 l.jpg
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 l.jpg
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 l.jpg
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 l.jpg
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 l.jpg
THE END

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


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