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Video projector - metal cutting machine tools Manufacturer - stainless steel slitting by wqecv thbtn
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Video projector - metal cutting machine tools Manufacturer - stainless steel slitting by WQECV THBTN
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| Article Posted: 03/11/2011 |
| Article Views: 288 |
| Articles Written: 1385 - MORE ARTICLES FROM THIS AUTHOR |
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Video projector - metal cutting machine tools Manufacturer - stainless steel slitting |
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Business,Business News,Business Opportunities
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Overview A video projector, also known as a Digital Projector, may be built into a cabinet with a rear-projection screen (rear-projection television, or RPTV) to form a single unified display device, now popular for ome theater applications. Common display resolutions for a portable projector include SVGA (800600 pixels), XGA (1024768 pixels), 720p (1280720 pixels), and 1080p (19201080 pixels). The cost of a device is not only determined by its resolution, but also by its brightness. A projector with a higher light output (measured in lumens, abbreviated m) is required for a larger screen or a room with a high amount of ambient light. A rating of 1500 to 2500 ANSI lumens or lower is suitable for smaller screens with controlled lighting or low ambient light. Between 2500 and 4000 lm is suitable for medium-sized screens with some ambient light or dimmed light. Over 4000 lm is appropriate for very large screens in a large room with no lighting control (for example, a conference room). Projected image size is important; because the total amount of light does not change, as size increases, brightness decreases. Image sizes are typically measured in linear terms, diagonally, obscuring the fact that larger images require much more light (proportional to the image area, not just the length of a side). Increasing the diagonal measure of the image by 25% reduces the image brightness by 35%; an increase of 41% reduces brightness by half. Projection technologies A Zenith 1200 CRT Projector based home theater, ca. 2006. CRT projector using cathode ray tubes. This typically involves a blue, a green, and a red tube. This is the oldest system still in regular use, but falling out of favor largely because of the bulky cabinet. However, it does provide the largest screen size for a given cost. This also covers three tube home models, which, while bulky, can be moved (but then usually require complex picture adjustments to get the three images to line up correctly). LCD projector using LCD light gates. This is the simplest system, making it one of the most common and affordable for home theaters and business use. Its most common problem is a visible creen door or pixelation effect, although recent advances have minimized this. DLP projector using Texas Instruments DLP technology. This uses one, two, or three microfabricated light valves called digital micromirror devices (DMDs). The single- and double-DMD versions use rotating color wheels in time with the mirror refreshes to modulate color. The most common problem with the single- or two-DMD varieties is a visible ainbow which some people perceive when moving their eyes. More recent projectors with higher speed (2x or 4x) and otherwise optimised color wheels have lessened this artifact. Systems with 3 DMDs never have this problem, as they display each primary color simultaneously. LCOS projector using Liquid crystal on silicon. D-ILA JVC Direct-drive Image Light Amplifier based on LCOS technology. SXRD Sony proprietary variant of LCOS technology. LED Use an array of Light Emitting Diodes as the light source, negating the need for lamp replacement. Obsolete technologies Eidophor oil-film projectors LIA (Light Image Amplifier) light valves Schmidt-CRT, developed by Kloss Video Talaria oil-film projectors DIY video projectors With a growing DIY-community and an increasing interest in low cost devices, some hobbyists have endeavored to build their own projectors from kits, sourced components, or from scratch. Through the internet, the community is now able to obtain plans to construct DIY-video projectors. Although most DIY projectors use HID lamps, some projects feature conversion to LED .There is a growing trend toward building them for domestic requirements and classroom use. The DIY-projectors are now being used both in developed countries and in developing countries in the interest of providing education as well as for entertainment purposes. See also Comparison of display technology Digital cinema Digital divide Handheld projector Inflatable movie screen Large-screen television technology Projection screen Projector for a directory of projector types Screen door effect 3LCD DLP References ^ Lumens guide. ProjectorPeople.com. ^ Buying guide. TvSpecialists.com. ^ DLP vs. LCD Technologies. Boxlight Corp. ^ A DIY lcd projector ^ Another set of diy lcd/lighbulb projectors ^ LED-projector conversion overview ^ Howto convert to LED v d e Display technology Video Current generation Electroluminescent display (ELD) Vacuum fluorescent display (VFD) Light emitting diode (LED) display Cathode ray tube (CRT) Liquid crystal display (LCD) (TFT LED backlight) Plasma display panel (PDP) 3LCD Digital Light Processing (DLP) Liquid crystal on silicon (LCOS) Next generation Organic light-emitting diode (OLED) (roll-up display Active-matrix Phosphorous) Surface-conduction electron-emitter display (SED) Field emission display (FED) Laser TV Ferro Liquid display (FLD) Interferometric modulator display (IMOD) Thick-film dielectric electroluminescent (TDEL) Nanocrystal display Quantum dot display (QDLED) Time-multiplexed optical shutter (TMOS) Telescopic pixel display (TPD) Liquid crystal lasers (LCL) Laser Phosphor Display (LPD) Non-video Electromechanical (Flip-dot Split-flap Vane) Electronic paper Rollable Eggcrate Nixie tube 3D display Stereoscopic Autostereoscopic Computer generated holography Volumetric Laser beam Static media Hologram Movie projector Neon sign Rollsign Slide projector Transparency Related articles Display examples Free-space display Large-screen television technology Optimum HDTV viewing distance High dynamic range imaging (HDRI) Comparison of display technology Categories: Projectors Office equipment Digital technology Film and video technology The e-commerce company in China offers quality products such as metal cutting machine tools Manufacturer , stainless steel slitting, and more. 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