Projectors are devices that use light to project an image onto a screen. They can be used in offices, classrooms, at home, in the movie theatre and many other places. Here are 5 types of projectors and their uses:
CRT
Cathode ray tube (CRT) projectors are one of the earliest forms of projectors. These projectors use three tubes, each projecting a primary colour, fitted with lenses that carry the light through the projector and magnify the image. These lenses need to be focussed in order to create a decent image. CRT projectors need to be set up manually to ensure the image is clear.
LED
Light emitting diode (LED) projectors are the most environmentally friendly choice of projector because of their low heat levels which consume less energy. The lower heat levels also allow LED projectors to last longer. These projectors emit light particles onto an image element that reflects onto a screen to create a coloured image.
DLP
Digital light processing (DLP) projectors produce an image by reflecting light off a digital micromirror device (DMD) chip that has multiple little mirrors. DLP projectors with three chips can show red, green and blue lights simultaneously. These projectors trick our eyes into seeing a full image when instead it is only a mixture of three colours.
LCD
Liquid crystal display (LCD) projectors are very popular among users. The chances are the image you are seeing on the screen is being emitted from an LCD projector. The light is emitted in three different colours – which is why LCD projectors are also called 3LCD projectors – and are brought together in a prism to create a clear, crisp image.
LCOS
LCOS projectors are the love child of LCD and DLP projectors. It is the attempt at combining the best features from each projector. These projectors use liquid crystals to produce an image rather than mirrors.
