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Presentation, AV, Projectors

Presentation, AV, Projectors Article

takes a video signal and projects the corresponding image on a projection screen using a lens system. All video projectors use a very bright light to project the image, and most modern ones can correct any curves, blurriness, and other inconsistencies through manual settings. Video projectors are widely used for conference room presentations, classroom training, and home theatre applications.

A video projector may also be built into a cabinet with a rear-projection screen (rear-projection TV, or RPTV) to form a single unified display device, now popular for .home theater. applications.

Common display resolutions for a portable projector include SVGA (800×00 pixels), XGA (1024×68 pixels), 720p (1280×20 pixels), and 1080p (1920×080 pixels).

The cost of a device is not only determined by its resolution, but also by its light output, acoustic noise output, contrast, and other characteristics. While most modern projectors provide sufficient light for a small screen at night or under controlled lighting such as in a basement with no windows, a projector with a higher light output (measured in lumens, abbreviated .lm.) is required for a larger screen or a room with a higher amount of ambient light. A rating of 1000 to 1500 ANSI lumens or lower is suitable for smaller screens with controlled lighting or low ambient light. Between 1500 and 3000 lm is suitable for medium-sized screens with some ambient light or dimmed light. Over 3000 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 per cent; an increase of 41 per cent reduces brightness by half.

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Power Point Presentation Remote clicker

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Eiki Overhead Projector 3850A

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Epson EMP-8300 Multimedia Projector with 2 extra lamps

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106 16:9 High Gain High Contrast Projector Screen Black

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10W Megaphone / Bullhorn Music & Speaker Mic. -BULLHORN

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GREAT 3M OVERHEAD PROJECTOR MODEL 394 W/ BULB

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NAME BADGE LABELS 3.375" X 2.33" LABEL :313806

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Apollo Horizon Ultra Overhead Projector

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NEW Siig - Cyber 2S1P PCI

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Sony BKM-V11 Component/RGB Input Adapter Card w/Audio

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New 3M Highland 903 Transparency Film 100 Sheets

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80" 16:9 HDTV Electric Motorized Screen Gray Fabric

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3M 2770 AJB Compact Slim Overhead Projector & case LOOK

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NAME BADGE LABELS 3.375" X 2.33" LABEL :313806

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3M Overhead Projector 2000AG

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Dry erase board magnetic 30" x 18" Quartet NEW

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Clarion Projection Screen

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3m Overhead projector 395 tested

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3M 1730 School Overhead Projector * * NEW BULB * *

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3M Overhead Projector #313

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95 Gray FIXED FRAME PROJECTOR SCREEN 16:9 WIDESCREEN

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56 EXPO DRY ERASE MARKERS Vivid Colors!

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DA-LITE 72x96 MANUAL WALL MOUNT PROJECTOR SCREEN NEW

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NEW ELECTRIC MOTORIZED PROJECTOR SCREEN 150" 4:3 NR!

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3M 213 Overhead Projector w/ WRNTY

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Canon RE-350 Image Presentation Camera Visualiser RE350

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MEGAPHONE - 25 WATT + SIREN + SPEAKER HANDSET !!LOUD!!!

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High Definition Panasonic PT L735NTU LCD Projector

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TRANSPARENCY FILM HEWLETT PACKARD PRINTER INK JET COLOR

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Very Nice 3M 5-088 5088 Portable Overhead Projector

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ELMO Overhead Projector * NEW BULB* Great for Murals

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Shure OmniDirectional Condenser Microphone 700623-002

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3M Still Picture Overhead Projector 66Cgg

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60" PLASMA SCREEN TRAVEL/SHIPPING CASE! - NEW!

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NEW 30 WATT MEGAPHONE BULLHORN HORN SPEAKER SIREN MUSIC

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Smartboard Interactive Whiteboard With NEC Projector

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30W Megaphone:Safety Siren:Music:Speaker Mic.- Bullhorn

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32" DA-LITE Lexington Lectern podium height adjustment

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MEGA PHONE MEGAPHONE BULL HORN BULLHORN SPORTING EVENT

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Bell and Howell 3860A Still Picture Projector

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Elmo Overhead Projector HP-L3550H + spare lamp

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30W Megaphone:Safety Siren:Music:Speaker Mic.- Bullhorn

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10W Megaphone / Bullhorn Music & Speaker Mic. -BULLHORN

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Logitech Cordless 2.4 GHz Presenter

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NEW 3M 2000 LUMENS 1600 SERIES OVERHEAD PROJECTOR

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NEW Siig - Cyber I/O PCI Serial Parallel Combo Adapter

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Beautiful wood podium, lectern

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APOLLO ECLIPSE MODEL AI-2000 OVERHEAD PROJECTOR

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Very Nice 3M Overhead Projector Model 2000

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NEW ELECTRIC MOTORIZED PROJECTOR SCREEN 106" 16:9 NR!

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Elmo Solar Deluxe Overhead Projector

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Compaq iPAQ MP2810 DLP Projector

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Apollo Overhead Projector 16000 Apollo Horizon 2 NEW

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CTX Optoma EzPro 710 DLP Portable Projector w/Remote

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