INPUT TECHNOLOGY

LECTURE 5

Video Display Unit                                     Sound Output

FRI JUN 29 2018

INTRODUCTION

The input technology refers to the technology and tools or devices that are used to transform data type provided by users to data type that can be processed by the computer.  Examples of input devices that are usually used are the keyboard, mouse, joy stick, and track balls.  As we saw earlier, a good system should be safe, effective, efficient, and comfortable for usage.  To ensure this, the selection of technology to be used in the interaction between humans and computers should be done carefully, as the input device used may not always be suitable to the existing physical conditions or physiology of users.

5.1     HCI GOALS

The keyboard is one of the earliest devices used in computer systems.  There are many variations of keyboards that have been produced over the years, differing in design and key arrangements.  Each of these variations depends on some specific purpose.  Examples are:

  • QWERTY Keyboard

  • DVORAK Keyboard

  • Chord Keyboard

  • Other Keyboards

    • Alphabetic Keyboard

    • Natural and Ergonomics keyboards

  • Special Keyboards

5.2     INPUT DEVICES

  • Mechanical Mouse

  • Optical Mouse

  • Joystick

  • Touch Screen

  • Light Pen

  • Track Balls

5.3     INPUT DEVICES IN 3D DISPLAY DEVICES

A 3-Dimensional environment requires more complex interaction and exploration techniques compared to a 2-Dimensional environment.  The movement in a 3-Dimensional environment could require up to six degrees of movement.  Thus, the device that is used should also be suited for this situation.  The virtual reality environment is an example of the 3-Dimensional environment.  Among the input devices that are used as an interaction medium between the users and environment are:

  • Data Gloves

  • Virtual Reality Helmets

5.4     DEVELOPMENTS IN INPUT

  • Voice Recognition

  • Handwriting Recognition