What is LCD technology?

Video projectors function by means of acknowledging video signals emitted by a source and projects the image on a screen with the help of a system of lenses. There are various technical tools with the help of which video projection is ensured. The foremost among them is the LCD technology. The LCD projectors function with the help of liquid crystal display light gates and they are used for demonstrating computer data, videos and images on flat surfaces or a screen. In the very beginning, LCDs were used in accordance with overhead projectors and the LCD system itself had no light source within itself.

Nowadays however, LCDs perform with the help of liquid crystal display projectors which transmits light from a Metal halide lamp via the three panels of the LCD, for the red, blue and green constituents of the video signal. The panels are comprised by the polarizer, analyzer and the LCD panel and as polarized light waves pass through it, the varying pixels either open up to allow the passage of light or close in to prevent the light waves to pass creating obstruction or a barrier. The myriad color shades produced by the image occurs as a result of this constant process of opening and closing down of the pixels. There are certain reasons why the Metal halide lamps are used for these purposes. Firstly, a prominent reason is that these lamps are able to emit huge volume of light within a smaller zone, averaging around 2000 to 4000 lumens. Moreover they present an expansive spectrum of color at perfect color temperatures. It is also because of the prominent use of these Metal halide lamps that can reflect on flat surfaces that LCD projectors are available in concised sizes and are portable compared to the other projectors. In case of LCD technology, white surfaces are more prevalently used as they emit other color tones naturally and are universally used in case of professional and classroom presentations.