It’s easy to understand that a projector’s sharpness would be undermined by a poor lens or other optical elements placed in the light path. Only two manufacturers make LCoS-based home theater projectors: JVC, with its D-ILA (Direct-Drive Image Light Amplifier) technology, and Sony with SXRD (Silicon X-tal (crystal) Reflective Display). LCoS is more expensive than LCD but offers some key benefits, including the valuable potential for lower native black level and high contrast.Īs with LCD, three separate LCoS chips are dedicated to the red, green, and blue components. Instead of light passing straight through the LCD panel, it is enters through the front, hits a reflector, bounces out, and is directed through the lens to the screen. LCoS, or liquid-crystal-on-silicon, is a variant of LCD. Several manufacturers make 3LCD projectors for business, education, and other commercial applications, but Epson remains the only major brand selling LCD projectors for home theater. As noted, separate LCD imaging chips for the red, green, and blue picture elements are typically employed, hence the “3LCD” branding associated with them. LCD projectors shine a light source through translucent liquid-crystal panels whose pixels can be individually opened or shuttered by the video signal to make them brighter or darker. The mirrors oscillate at different speeds to brighten or darken the pixels as needed. The mirrors each pivot on their own post, and can be independently positioned to direct a point of light to the screen or to dump it into a light-absorbing area, thus leaving that pixel dark. These present an array of tiny, pixel-sized mirrors to the light source-as many as 8.3 million in a native 4K-resolution DMD measuring just 1.38-inches wide. DLP projectors utilize one or more electro-mechanical imaging devices called DMDs, or Digital Micromirror Devices. DLPīy far the most popular technology found in projectors of every type and size, Digital Light Projection is an invention of Texas Instruments that has revolutionized the projection world. All of these technologies offer many advantages over film and CRT projectors-smaller size, lower weight, less heat generation, and more efficient energy usage-and each one has its own strengths and weaknesses for different applications. Today, film has been almost completely replaced by digital-video projectors that are based on one of three imaging technologies: LCD, LCoS, and DLP. A lens and associated optical elements, which are used to generate color and project the image onto the screen.This will typically be either a single Digital Light Projection (DLP) micromirror device, a trio of LCD (liquid crystal display) panels or a trio of LCoS (liquid crystal on silicon) chips. An imaging chip or chips that generate the image based on the video source signal.In today’s projectors this will be a traditional lamp, a bank of laser diodes, or a bank of LEDs (light-emitting diodes). A light source that creates the light for the image.
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