Projection technology has its origins in ancient human history. As early as 300-400 BCE, humanity has been inventing ways to manipulate light to capture and project images. Like their ancient predecessors, modern projectors still manipulate light, but they do so in a very sophisticated manner. Most projectors found in today’s conference rooms and classrooms use DLP (Digital Light Processing) technology. DLP projectors use a specialized chip, called a “digital micromirror device” (DMD) to create the image that will be projected. DMD chips use thousands of microscopic mirrors, which can each rapidly toggle to reflect light through the projector lens. Each mirror on the DMD chip roughly represents one pixel of the final image.
DLP projectors use a few different kinds of technology to project images with a vibrant array of colors. One projection technology creates the display by placing a wheel of transparent colors between the projector lamp and the DMD chip. The mirrors on the DMD chip toggle in unison as each color on the wheel rotates past the lamp. In slow motion, only one color is projected at a time, but the mirrors and wheel move rapidly enough that the projected colors create a seamless image for the viewers. Another DLP projection technology uses three DMD chips and a prism. The prism splits the light from the projector lamp into the three primary colors. These colors are beamed to a dedicated DMD chip, which reflect the light through the lens to create the final image.
If your company has excess conference room and presentation systems, IT Liquidators can turn that surplus projection equipment into cash. We purchase a variety of corporate presentation technology, including DLP projectors and more. Here are some of the major projector manufacturers we purchase:
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