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Before buying a projector, first determine how far from the screen or wall it will be placed. If the projector isn't placed at its optimal throw distance, it won't provide a sufficiently sharp image.
Movies are filmed in widescreen resolution. Therefore, when choosing a a film projector, go for a model with an aspect ratio of 16:9 or 21:9. A Full HD (1920 × 1080 pixels) or 4K (3840 × 2160 or 4096 × 2160 pixels) native resolution provides excellent image quality. If you are on a limited budget or require a shorter throw distance, HD resolution (1024 × 768 pixels) is sufficient.
For presentations, we recommend an aspect ratio of 16:10 or 4:3. Office projectors with WXGA resolution (1280 × 800 pixels) or higher provide sufficient image quality .
Visualisers can scan photos, sheets of paper with text, objects, etc., and convert them into digital form. Then you can display the information on your computer screen or project it through the projector. Visualiser are often used during lectures and presentations.
The further you place the projector from the screen or wall, the larger the size of the projected image.
|Projection distance||2 m||3 m||4 m||5 m|
|Diagonal||1.1 to 1.6 m||1.6 to 2.4 m||2 to 3.2 m||2.5 to 4 m|
Before buying, make sure the projector has at least one same port as the device to which you plan to connect it. If not, you won't be able to connect to the projector.
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Projectors are excellent presentation tools as well as perfect home cinema devices. They can be easily connected to DVD players and computers, so you can sit back, munch popcorn, and enjoy great cinematic experiences in the comfort of your own home.
Projectors typically have many input signal options, featuring composite, S-Video, VGA or HDMI. You can project on plain white walls, but to get the best performance, choose from the range of professional projection screens available. Depending on the way in which they process the internal video signal, projectors are either LCD or DLP. Although these technologies are different, and LCD projectors used to be considered better for projecting data from computers while DLP models were ideal for screening films, today both technologies are practically equivalent.
The light source in LCD projectors passes through three primary colour filters. Each then passes into one of three LCD panels through a permeable layer. Finally, all three colours are combined again and projected through an optical device onto a screen, where they are displayed as a complete picture. These devices are both lightweight and easy to maintain.
DLP projectors work with DMD chips and use a large number of microscopic mirrors, with each mirror representing one pixel. The image is again broken down into the three primary colours (red, blue, green) and then passes through the micro mirrors and lens before being projected onto a screen.
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