There is simply no end to innovation. As one new innovation surpasses another, technology has gradually morphed into a superior force that dominated every aspect of our lives. Every technological innovation is measured by the dint of its output. LCD projector is the name that tops the list. Today, LCD projectors are a necessity. It is an integral part of every business meetings, seminars and conferences. The origin of LCD projectors dates back to 1971 when Gene Dolgoff for the first time used liquid crystals to modulate light. And it was in 1981 when for the first time LCD (Liquid Crystal Display) projectors were introduced in the market. The technology behind these projectors is very complicated. A light beam sent from metal halide lamp through a prism. The prism segregates the light into three poly silicon panels for three different components of video signals. As light passes through these panels, the individual pixels are opened to pass and closed to block light. This very combination of pixels produces a wide range of colour in the projected image. One of the best advantages of LCD projector is that it is highly portable.The price of the portable machines are a relatively higher than its primitive counterparts.. The lightest model available till date weighs less than five pounds. While you buy a light weight LCD projector, you should not forget to consider the weight of the case where it is encased. There are some important factors to be borne in mind while you settle for buying one.Firstly, the screen resolution should suit your usage. The resolution that works fine for a PowerPoint presentation may be a total misfit for showing statistical data or numerical figures. Secondly, the size of the lumen should be in conformity with the place where the projector would be used. More the number of people, the better should be the brightness of the images. A 1000 to 2000 lumen projector would work fine for a medium sized room. Again, while you are presenting something in a seminar, you need a projector with higher lumen. While buying LCD projectors, one should go for quality. It is advisable that you go for the one that has a durable lamp. Most LCD projectors today have a lamp life of 1000hrs and this may go up to 4000hours. Replacement bulbs may ultimately cost you more in the long run. It is always better to refrain from using halogen lamps since they exhaust after 70 hours and produces a yellowish tinge on the images. One must doubly ensure that the projector he buys is video compatible. While composite video input allows you to connect video players, component video inputs allows you to connect directly to DVD Players, digital VCRs and HDTV tuners. The HDTV(High definition television) signals are digital and supports a higher resolution. Last but not the least; a projector should always be ideally positioned at the centre of the screen. If that is not done, the images are projected at an angle and may appear distorted. The keystone correction feature adjusts and enhances correct positioning of images.
