Projectors

Projectors

1. Uses

   • Projectors help that communication by expanding the image of your computer screen to be large enough for a room full of people to see.
   • In presentations and multimedia applications
   • In meetings and home theatres

2. Types

   • DLPs
     • The use of millions of micro-mirrors on a Digital Light Projector (DLP) screen
       • Functionality
         • The number of mirrors and the way they are arranged determines the DLP's resolution
           • When the mirrors turn towards the light source, they are ON
           • When they tilt away from the mirrors, they are OFF
           • A light or dark pixel is created on the screen
             • Around 1024 different grey shades can be produced, known as a 'grey cycle image'
   • LCDs
     • A high-intensity beam of light passing through an LCD display and then on to a screen
       • A powerful beam of light is generated from a bulb inside the projector body, which is sent to a group of chromatic-colored mirrors; the light is reflected back at different wavelengths
         • When the white light hits the mirrors, the reflected light has wavelengths corresponding to red, green and blue