10.17.06_-_Input_and_Output_Devices by fanzhongqing


									Input and Output Devices
CIS105.02 - Chapters 5 & 6
   What is Input?
       Any data and instructions entered
        into the memory of a computer.
   So, then what are input
       Any hardware component that
        allows users to enter data and
        instructions into a computer.
   One example of an input device
             A Keyboard!
   Keyboard connections
       Serial, AT, PS2, USB, RF,
        Bluetooth, built-in.
   Keyboard ergonomics
       The goal is to incorporate comfort,
        efficiency, and safety into design.
              A Mouse!
   A mouse is a          Types of mice
    pointing device           Mechanical
    that fits under            Mouse
    the palm of your          Optical Mouse
    hand                      Laser Mouse
Other pointing devices…
 Trackball
 Touchpad
 Pointing Stick
 Joystick and Wheel
 Audio Player Control Pad
 Gamepad
 Light Pen
 Touch Screen
 Pen Input
            Audio Input
   Voice Input
     Built-in Mic
     External Mic

 Speech Recognition
 Audio Input
PDAs, Smart Phones, Tablet PCs…

 The inputs for these devices
  don’t differ too much in
  function, just in integration.
 Keyboards, Stylus, Camera,
      Digital Cameras
 Light enters the lens and is
  projected onto the CCD (charge
  coupled device).
 The CCD generates an analog
  signal that then gets converted
  to a digital signal (the digital
 A processor in the camera
  adjusts the quality of the picture
  and stores it on the camera’s
  storage medium.
Digital Cameras (Cont.)
 How do you tell a good digital
  camera from a cheap one?
 Resolution
 CCD size (and quality)
 Zoom
           Video Input
   Types of Cameras
     DV Cameras
     PC Cameras
     Web Cams
   The lines that separate these
    types of cameras are pretty
    blurred. Most cameras can fall
    under a couple of these
    categories. Even many still
    cameras can create video clips.
    Other Input Devices
 Scanners (flatbed, OCR)
 Optical Readers
 Bar Code Readers
 RFID Readers
 Magnetic Stripe Card Readers
 MICR (Magnetic Ink Character
  Recognition) Readers
 Data Collection Devices

Let’s talk about Output Devices
   What is output?
       Output is data that has been
        processed into a useful form…text,
        graphics, audio, video.
   What is an output device?
       Any type of hardware component
        that conveys information to one or
        more people.
            Display Devices
   Flat Panel Displays
       LCD Monitors
   LCD Technology – A sandwich that gets an
    electrical charge applied to certain areas,
    causing cells in the center of the sandwich
    to twist, making them look different from
    the rest of the cells.
   LCD Quality
       Resolution
       Response Time
       Brightness
       Dot Pitch
       Contrast Ratio

   GPU – Graphics Processing Unit
   DVI – Digital Video Interface
   S-Video
   Resolution
       VGA (Video Graphics Array) – 640x480
       SVGA – 800x600
       XGA – 1024x768
       SXGA – 1280x1024
       UGA – 1600x1200
   Bit Depth - 24, 32
          CRT Monitors
   Cathode Ray Tube
     Resolution
     Dot pitch
     Refresh rate
   Non-impact printers
       Inkjet printers
       Photo Printers
       Laser Printers
       Thermal Printers
       Mobile Printers
       Label Printers
       Plotters and large format printers
   Impact Printers
       Dot-matrix printers
       Line Printers
    Speakers, Headphones, Earphones

   These are pretty self-

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