![]() When you step up to UHD/4K-resolution, the lens requirements shoot up, which-along with the more expensive imaging chips-is a factor in the higher cost of 4K projectors. Today’s 1080p-resolution budget projectors in the $500 to $1,000 range from the major brands come with surprisingly good lenses and deliver sharp and essentially uniform images. The best lenses are made of high quality glass, with multiple elements (and “groups” of elements) that help eliminate aberrations-usually, the more elements, the better and more expensive. 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.While there are applications that can help users connect their iPhone or Android phone to a projector, there are no apps that can turn a smartphone into a projector. However, due to obvious limitations of size, the projection equipment on these devices was more of a gimmick than an actual feature, and the companies eventually stopped production on these devices. The smartphones mentioned above have a dedicated screen and lens setup for projecting images on a surface, unlike the iPhone 13, Samsung Galaxy S22 and other current smartphones. Lenovo also created a smartphone with a built-in projector, called the Lenovo Smart Case. Then there's the Movi Phone which features a 50 lumen, 1280 x 720 resolution projector along with a 5.5-inch FHD IPS display and a 13MP rear camera. While these specifications sound ordinary, the device had a 20 lumens projector with 800 x 480 resolution built in to its top panel. ![]() The smartphone had a 4.66-inch display and ran on Android 4.2 Jelly Bean. Back in 2014, Samsung launched a smartphone called the Samsung Galaxy Beam 2. ![]()
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