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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 Overhead Projector 910

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D-Link DPG-2000W Wireless Presentation Gateway 802.11G

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

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ROSEART MAGNETIC DRY ERASE BOARD 18" BY 22" NEW SEALED

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ELMO EV-4400AF VIDEO PRESENTATION DOCUMENT CAMERA

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DA-LITE 70x70 HIGH GAIN (2.5) TRIPOD PROJECTOR SCREEN

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HISONIC 35 WATT PA SYSTEM w/ 3 VHF WIRELESS MICROPHONES

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3M BUHL 2660 PORTABLE OVERHEAD PROJECTOR 2500 LUMEN NEW

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Mini Portable PA + VHF Wireless Mics + Record / Play

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Wireless Presentation Remote Powerpoint Laser Pointer

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3M 9100 FOLDING OVERHEAD PROJECTOR *2 BULBS *2800 LUMEN

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MAGNA VISUAL 36" X 24" MAGNALITE MONTHLY PLANNER NWOB

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Dukane model 4003 Overhead Projector

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100 16:9 High Gain High Contrast Projector Screen White

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TOSHIBA Data Projector (TLP671)

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NADY U-81 OCTAVO 8 UHF WIRELESS LAPEL MICROPHONES

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APOLLO Horizon 2 Overhead PROJECTOR

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NEW 30 WATT MEGAPHONE BULLHORN HORN SPEAKER SIREN MUSIC

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120" 4:3 High Gain High Contrast Projector Screen White

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Dukane 4000 Portable Overhead Projector with Case

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AOSOM MANUAL WALL PROJECTOR PROJECTION SCREEN 96"X96"

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EXECUTIVE LASER POINTER PEN DELUXE GIFT SET +FREE BONUS

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NAME BADGE LABELS 3.375" X 2.33" LABEL :313806

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EYB 360W 82V G5.3 Halogen Projector Bulb; OSRAM brand

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Panoview DS-3084PM 84" 4:3 Digital Projection Screen

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AOSOM MANUAL WALL PROJECTOR PROJECTION SCREEN 70"X70"

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EIKI LC-XNB2 NOTEBOOK PROJECTOR (Need Repair)

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PORTABLE 25 WATT PUBLIC ADDRESS + 3 VHF WIRELESS MICS

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100 IBM Inkjet Transparency Film w/Stripe, Ink Jet!

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3M 2000 AG Overhead Projector

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Travelgraph L101 L-101 Overhead Projector Good

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COMBO 50 & 15 WATT LAW ENFORCEMENT BULLHORN MEGAPHONE

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LASER POINTER PEN ~ BLACK FINE POINT ~ WITH FREE BONUS!

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NEW 30 WATT MEGAPHONE BULLHORN HORN SPEAKER SIREN MUSIC

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130" 4:3 Electric Motorized Screen Dual Remote White

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NADY U-81 OCTAVO 8 UHF WIRELESS HEAD WORN MICROPHONES

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Panoview DS-3084PM 84" 4:3 Digital Projection Screen

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ELMO EV-4400AF HIGH RESOLUTION VISUALIZER PRESENTER NR%

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2 NEW COMPACT POCKET MINI MEGAPHONE CHEER SPORTS SIREN

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HISONIC HS8100 4 VHF WIRELESS HEADSET LAPEL MICROPHONES

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HEWLET PACKARD HP 5036A MICROPROCESSOR LAB

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110" 4:3 Electric Motorized Projector Screen Gray

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Canon RE-350 Video Visualizer Presentation Camera

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"YELLOW BIRD" DRY ERASE MEMORY BOARD by VERA BRADLEY

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Artograph Super Prism Opaque Projector and Table Stand

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Canon DZ-3600U Digital Document Camera Projector

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LASER POINTER with 42 DIFFERENT TIPS KEY CHAIN

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PORTABLE 25 WATT MEGAPHONE w/LOUD SIREN w/MICROPHONE

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Corkboard School Office Wall bulletin Cork board 24x36"

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Portable 25 Watt Megaphone w/Microphone w/LOUD Siren

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Clarity Visual video wall 14 screens AWSOME DEAL NR

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AV Projector Equipment Loan Service Tracking Database

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AOSOM MANUAL WALL PROJECTOR PROJECTION SCREEN 60"X60"

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EXW Projector Lamp 300W 82V - Wiko / Philips Light Bulb

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NEW PORTABLE 10 WATT HANDHELD MINI MEGAPHONE LOUD SIREN

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DA-LITE Tripod Projection Screen + WOOD SHIPPING CRATE

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105 Fixed Frame Projector Screen 2.35:1 Gray Fabric

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New Lexmark Overhead Transparencies for Laser Printer

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PRECISION IMAGING PRODUCTS TRANSPARENCY FILM 100pcs.

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3M 9700 Portable Overhead Projector

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BHC 600W 120V GZ9.5 Halogen Projector Bulb; OSRAM brand

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Dukane 4003 Overhead Projector

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ENX 360W 82V GY5.3 Halogen Projector Bulb; OSRAM brand

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Apollo Overhead Projector

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

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NADY WA-120 PORTABLE PA + WIRELESS HEADSET MICROPHONE

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Elmo EV-700AF Visual Presenter

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3M Overhead Projector Model 213

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Procolor 1300 Boxlight LCD Projector

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NEW ELECTRIC MOTORIZED PROJECTOR SCREEN 100" 4:3 NR!

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ELMO DIGITAL SIGNAL PROCESS VISUAL PRESENTER EV-6000AF

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New Office Depot Exec Laser Pointer Pen LED Light PDA

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NEW 4' X 6' DRY ERASE MARKER BOARD BY MARSH® INDUSTRIES

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PORTABLE 25 WATT MEGAPHONE w/LOUD SIREN w/MICROPHONE

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NEW ELECTRIC MOTORIZED PROJECTOR SCREEN 84" 4:3 NR!

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Office Aluminum White Board Easel Tripod USA FREE SHIP

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Eclipse AI-2005 Overhead Projector

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NEW 30 WATT MEGAPHONE BULLHORN HORN SPEAKER SIREN MUSIC

$15.68
Epson ELPLP25 Spare Lamp New in Box

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3M Model 2000 AG Portable Briefcase Overhead Projector

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DA-LITE PORTA-SCRIBE Overhead Projector * New Bulb *

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Elmo FHL6EX-N Fluorescent Lamp 2 Pack

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10 XEROX COPIER LASER TRANSPARENCIES 100 COUNT 3R3108

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3M 9550 OVERHEAD PROJECTOR FOLDING DUAL-LAMP 9000AJH

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NEW 30 WATT MEGAPHONE BULLHORN HORN SPEAKER SIREN MUSIC

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Smart Interactive Rear Projection Whiteboard

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NEW AMPLIV0X PORTABLE SOUND SYS. BRAND NEW MODEL SW222

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Eiki Still picture Overhead Projector 3850A

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