Projector is another popular type of Display that is used for entertainment purposes. Projectors are widely used in business settings to make presentations visible for larger groups. Most of the projectors are combined with some kind of audio component, which makes them more useful in any home or office environment.
Projectors are one of the most important devices which helps in projecting any kind of graphs or images on a large screen. Some projectors also do the same thing directly on walls.
Projectors work by projecting an image onto a surface. The projector typically contains an illumination source (for example, a halogen lamp) and focusing optics for supplying the correct wavelength of light. The device is rotated so that this focused beam strikes the new plane where the image is to be displayed. In many cases, this reflection is achieved with a mirror or similar reflective coating applied to at least one major surface.