Projectors

Projectors

Those who want to show pictures or videos to a larger group of people, don't usually look to a screen, but to a projector - with this transforming a large canvas or a white wall into the screen. Relatively soon after its introduction, the LCD projector emerged as a genuine bestseller. They are relatively cheap, offer a sharp demarcation of the pixels, good legibility of text and graphics and are compact in designed. The disadvantages, however, are the sharply defined pixel structure, which can interfere with colorful pictures, and the subsequent costs, because the LCD lamps last only a short time and are very expensive. More suitable for continuous operation are tube projectors. The light-producing bulbs have almost five times the lifespan of LCDs. Another advantage is the pixel free working, making pictures look a little more natural if a little blurred. However, the price of tube projectors is very high. An alternative may therefore be the DLP projector. It works with electrically controlled, tiltable mirrors - each of which depicts an image point. DLP projectors are priced between CRT and LCD projectors. Their picture is more severe and has a stronger contrast than that of LCD projectors. Since the DLP mirrors know only the phases "on" and "off", colour differences must be produced through an appropriately pulsing switch - which could result in flickering and fuzziness in various shades of gray. New on the market are LCOS projectors, which are similar to DLPs, but deliver sharper pictures. The LED Beamer technology is likewise still very young. It possesses the highest life span, however, the projector is relatively faint and only suitable for smaller surfaces.

This category contains tests on beamer, Projectors, beamers.