chapter 12
Download
Skip this Video
Download Presentation
Chapter 12

Loading in 2 Seconds...

play fullscreen
1 / 17

Chapter 12 - PowerPoint PPT Presentation


  • 120 Views
  • Uploaded on

Chapter 12. Choosing interaction devices: hardware components. Introduction. Every user interface consists of a mixture of design components Hardware components: also known as I/O devices, or interaction devices Software components: generated by the underlying computer program.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Chapter 12' - conley


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
chapter 12

Chapter 12

Choosing interaction devices: hardware components

introduction
Introduction
  • Every user interface consists of a mixture of design components
    • Hardware components: also known as I/O devices, or interaction devices
    • Software components: generated by the underlying computer program
choosing interaction devices
Choosing Interaction Devices
  • Interaction devices are tools used to complete a job
  • To choose between devices, you need to ask the right questions
    • Questions are driven by constraints of the technology and by the uses to which the technology will be put
input devices
Input Devices
  • Keyboards, keypads & buttons
  • Pointing devices
input devices1
Input Devices
  • Keyboards, keypads & buttons
    • Discrete input devices: can be used to enter individual items of information
    • Questions:
      • What size do the keys need to be?
      • What shape should the keyboard be?
      • How robust does the keyboard need to be?
      • Which keys/buttons are needed and how should they be labeled?
input devices2
Input Devices
  • Pointing Devices
    • Continuous input devices: good at tasks that cannot be split easily into a number of discrete steps
    • 2 types:
      • Indirect: require the user to move a screen cursor using a secondary device
      • Direct: allow user to point directly at the relevant position on the screen
input devices3
Input Devices
  • Pointing Devices
    • Questions:
      • How easy to learn does the device need to be?
      • How accurate does the device need to be?
      • How much time will the user spend on the system?
      • How much space is there?
      • How robust does the device need to be?
      • How manually dexterous is the user?
input devices4
Input Devices
  • Alternative Approaches
    • Gesture
    • Iris & fingerprint recognition
    • Eyetracking
    • Handwriting recognition
    • Speech recognition
output devices
Output Devices
  • Screens
  • Loudspeakers
  • Simple output devices
output devices1
Output Devices
  • Screens
    • Most common
    • Can represent a wide variety of visual elements
    • CRTs & LCDs
output devices2
Output Devices
  • Screens
    • Questions
      • How detailed does the image need to be?
      • How many colors are needed?
      • How large does the screen need to be?
      • Does the screen need to be portable?
      • How much space is there?
output devices3
Output Devices
  • Loudspeakers
    • Questions
      • How are the speakers going to be used?
output devices4
Output Devices
  • Simple output devices
    • Lights, dials, gauges and buzzers
    • Questions
      • Will the data being output be better represented in analog or digital form?
output devices5
Output Devices
  • Alternative approaches
    • Head-up displays
    • Head-mounted displays (virtual reality systems)
    • Stereoscopic displays
ad