The basic principle involved in the working of a projector is simple. When a high intensity light is shone over a medium, it projects an image on the screen. Projector technology available in the market is of two types, namely DLP and LCD. The following steps will give you an insight into how both technologies work:

DLP projectors

DLP projectors are better known as digital light processing projectors. The workings of this projector are a lot more complex compared to LCD projectors. DLP projectors are usually used to project moving images.

1) A light is projected using a bulb or high intensity lamp in order to start projecting the image.
2) This light hits a colour disk and passes through it.
3) After the light has passed through the colour wheel it carries through to a chip with mirrors. These mirrors are turned off or on with the help of electrical impulses passing through them.
4) At this stage, after passing through the tiny mirrors, the beam of light goes through a lens and hits a screen.

LCD projectors

LCD projectors work in a very simple manner.
1) A strong beam of light from the bulb or the lamp is given out.
2) This beam of white light passes through a prism and splits into its seven constituent colours.
3) In this stage, there are LCD panels set up which are controlled by electrical impulses. These panels are used to control the intensity of the colour.
4) This then passes through a lens and is projected on a screen
While a DLP projector is better for video and moving images, LCD projectors are good for static images and slideshows.