Chapter 12
This presentation is the property of its rightful owner.
Sponsored Links
1 / 17

Chapter 12 PowerPoint PPT Presentation


  • 72 Views
  • Uploaded on
  • Presentation posted in: General

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.

Download Presentation

Chapter 12

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


Questions

Questions?


  • Login