The delivery of visual media through projection is an effective way to entertain, educate, and communicate with people on a large scale. The use of a multimedia projector gives the presentation agent a number of options when configuring a stage for the viewing audience. Whether conducting a presentation in the corporate environment, educational programs in the classroom, projecting motion pictures in front of a large audience, or in the home, the multimedia projector is a valuable tool for communication and entertainment.
At its most basic, a multimedia projector simply projects an image on a screen. There are a number of features available, however, that expand this basic functionality. Some multimedia projectors can be configured to project a computer's video signal, outputs from DVD players, and also direct connections from cable and satellite systems. Depending on the needs of the user and their project, there is a projection device designed for almost every application, level of quality, and size of audience. The prices of these devices can fluctuate greatly depending on its specifications.
A multimedia projector processes a specific video signal and projects a corresponding image on a large screen using a lens system. Video projectors incorporate the use of a very bright light to display the image. The video signal rides along a special digitized light that is then projected on thousands of reflectors within the projector, which then shine the image onto a screen. Many intelligently designed projectors can correct inconsistencies and distortions in the projection. Depending on the specifications of the multimedia projector, its resolution capabilities and cost, a unit can reproduce the input with sharp detail and clarity.
These projectors are capable of numerous display resolutions, including 800 x 600 pixels (SVGA), 1024 x 768 pixels (XGA), 1280 x 720 pixels (720p), and 1920 x 1080 pixels (1080p). Most importantly, the cost of a projector is not only depended on its resolution, but also by its light output. A high lumen output is essential for viewing on larger screens or in locations that contain a high level of ambient light.
An output level between 1500 to 2500 lumens suitable for smaller screens with controlled lighting or low ambient light. In a room equipped with a medium-sized screen, ambient light, or dimmed light, a 2500 to 4000 lumen level is a good choice. A projector with a 4000 lumen output level should work well with very large screens such as those used in a large conference room with little or no lighting control.