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Office Products

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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3M Folding Overhead Projecter 9550 9000AJH w/WRNTY

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New Apollo ENX 82V 360W Projector Lamp Bulb

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Draper Star Manual Projection White Screen 60" Portable

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72 Fixed Projector Screen Silver Frame 16:9 Gray Fabri

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EDNALITE PROJECTION POINTER MODEL 120A

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ELMO Visual Presenter EV-400AF Projector

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Portable Public Address System 10-Watt Powerhorn

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MEGAPHONE 30 WATT W/ MICROPHONE ~ SPORTING BULL HORN

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3M Overhead Projecter 9080 (2800 Lumens) w/ WRNTY

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Promethean Activboard 78 Interactive White Board

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90" 4:3 High Gain High Contrast Projector Screen White

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Mimio Digital Meeting Assistant Electronic Whiteboard

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

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Sharp XG-P10XU LCD Multimedia Projector w/ extra lamp!

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InFocus LP70+ Super Low hours with case and remote

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3M Overhead Projector 2000AG Carry Case

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MEGAPHONE 30 WATT W/ MICROPHONE ~ SPORTING BULL HORN

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3M OVERHEAD PROJECTOR - PORTABLE BRIEFCASE STYLE #2000A

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LOUD MINI MEGAPHONE ~ PORTABLE SIZED MEGA PHONE

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92 Fixed Projector Screen Silver Frame 16:9 Gray Fabri

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Dataton Smart-PAX QC, (1-Pair) Control Units

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Portable 25 Watt Megaphone w/Microphone w/LOUD Siren

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3M 9100 Model 9000AJB Collapsible Overhead Projector

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LOUD MINI MEGAPHONE ~ PORTABLE MEGA PHONE NEW

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Clarity, (Lot of 6) Remotes for Clarity Margay Cubes

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LASER POINTER with 42 DIFFERENT TIPS KEY CHAIN

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SAYETT DATASHOW 256C OVERHEAD LCD COLOR PROJECTION PAD

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Da Lite 72x96 projector screen, lk new, w/ pull rod

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3M Multimedia Projector - Overhead Projector

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3M Overhead Projector 2000AG Breifcase Portable

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Excellent 3M, Model 9100 Overhead Projector w/FREE GIFT

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NEW ELECTRIC MOTORIZED PROJECTOR SCREEN 84" 16:9 NR!

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Apollo 3000 Open Head Overhead Projector

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HP Premium Inkjet Transparency Film C3834A 67 sheet

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NAME BADGE LABELS 3.375" X 2.33" LABEL :313806

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NEW DALITE 84x84 GB 2.5 GAIN TRIPOD PROJECTOR SCREENS

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NAME BADGE LABELS 3.375" X 2.33" LABEL :313806

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50 IBM Color Laser Printer Transparency Film Sheets!

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BUHL OVERHEAD PROJECTOR MODEL 90ED

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3M Mixed Model, (10) Overhead Projector, 4000 lumens

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Apollo VS3000 Cobra Portable Overhead Projector NR

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Canon RE-350 Video Visualizer Presenter Document Camera

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DUKANE 28A680 Overhead Projector

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3M Overhead Projector 2000AH Breifcase Portable 220v

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CANON RE-350 VIDEO VISUALIZER DOCUMENT PRESENTER CAMERA

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Smart Tech. SmartBoard PT54-05-835 Smart White Board *

$34.99
NEW 3M Model 1711 Overhead Projector

$49.00
L120 Infocus Lamp DP5800/DP6800 Proxima Projector NIB!

$150.00
2 PKS 3M HIGHLAND 701 Transparency Film Transparencies

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AS-IS Optoma EzPro 732 Multimedia Projector 1400 LUMENS

$41.00
Dukane/Elmo, (Lot of 9) Assorted Overhead Projector

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Viewlex Little Giant Filmstrip Slide Projector

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3M 9200 Overhead Projector

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Pocket Size Sound and Music Speaker Megaphone

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Kodak Carousel 4400 Slide Projector Blem

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

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NEW SANYO LCD PROJECTOR HD PLC-XU87 720p/1080i DIGITAL

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NEW 3M 9100 Overhead Projector - 2800 Lumens

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90" 4:3 High Gain High Contrast Projector Screen White

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200 Avery Top Load Diamond Clear Sheet Protector,Hvy Wt

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NEC Projector Case ATAPRO200 for LT200 / LT240 / LT260

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

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92" 16:9 WideScreen Manual Pull Down Projector Screen

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Plus Elecctronic White Copyboard BF-030S for Meeting

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3M 9700 Overhead Projector w/WRNTY

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PORTABLE MEGAPHONE w/LOUD SIREN w/MICROPHONE ~500 FOOT~

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NEW CLOSED DOUBLET LENS ENX LAMP CHANGER 2800 LUMEN

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foray dry erase board 12"x12" clear frameless NEWsealed

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135 SHEETS NEW MULTI PURPOSE TRANSPARENCY FILM NIB

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80" 16:9 HDTV Electric Motorized Screen Gray Fabric

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NEW OVERHEAD PROJECTOR OPEN SINGLET LENS ENX LAMP 25...

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NEW Marsh Kids Lapboards White Whiteboard Markerboard

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Sharp 0A-1650 Computer Projection Panel

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106 16:9 High Gain High Contrast Projector Screen Black

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Dukane 28A663 Portable Overhead Projector Working Lamp

$20.76
3M #4405 Overhead Projector

$26.00
MEGAPHONE 30 WATT W/ MICROPHONE ~ SPORTING BULL HORN

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QUARTET OVONICS 3100 Electronic Whiteboard

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

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100 IBM Laser Printer/Copier Transparency Film Sheets!

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3M EYB HA6010-R 360 Watts / 82V Projection Lamp -3 Ct-

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3M 4415 Overhead Projector

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3M Still Picture Overhead Projector 66Cgg

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