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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.

Presentation, AV, Projectors Items

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30W MEGAPHONE BULLHORNS MICROPHONE SIREN SPEAKER MUSIC
$24.99
Quartet Dry-Erase Board Magnetic Plastic Frame 9" X 11
$9.98
DUKANE V-P MATIC 28A60A A/V PROJECTOR+CASSETTE
$29.00
30W MEGAPHONE BULLHORNS MICROPHONE SIREN SPEAKER MUSIC
$24.99
Elmo TT-02S Teacher's Tool Document Camera New N/R!
$179.50
NEW 30 WATT MEGAPHONE BULLHORN HORN SPEAKER SIREN MUSIC
$15.68
OSRAM NAED/54753 Halogen Photo Optic Lamp
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DUKANE 28A600 PORTABLE PROFESSIONAL OVERHEAD PROJECTOR
$99.99
Elmo DT-70 Desktop Presenter
$14.99
OPTOMA DX605R DLP PROJECTOR w/ Case WOW !
$499.00
CANON RE-350 VIDEO VISUALIZER/PRESENTER DOCUMENT CAMERA
$425.00
Overhead Projector Transparency Film Pencils lot of 5
$0.99
Infocus 590-0221-04 PC/MAC Projector Cable Wizard II
$24.99
DA-LITE 48x64 DELUXE INSTA-THEATER 80" PORTABLE SCREEN
$405.46
SAMSUNG XGA OVERHEAD DIGITAL VISUAL PRESENTER UF-80ST
$559.93
2 NEW COMPACT POCKET MINI MEGAPHONE CHEER SPORTS SIREN
$14.90
3M Model 1830 Overhead Projector * NEW BULB *
$39.95
Lumens DC80A Visualizer Video Presenter Document Camera
$182.50
NEW 30 WATT MEGAPHONE BULLHORN HORN SPEAKER SIREN MUSIC
$15.68
Sylvania Projector Lamp Bulb New in Box CBA 500w 50hrs
$9.99
NEW PORTABLE 10 WATT HANDHELD MINI MEGAPHONE LOUD SIREN
$11.90
DA-LITE PORTA-SCRIBE G-100 OVERHEAD PROJECTOR WITH BULB
$24.00
30W MEGAPHONE BULLHORNS MICROPHONE SIREN SPEAKER MUSIC
$24.99
3M overhead projector model 213 A/V AS IS
$9.99
Da-Lite H323 6 Ft Portable Display Easel w/ Chart Clamp
$39.99
Dalite 72x96 1.5Gain Free S&h/Brackets PROJECTOR SCREEN
$256.00
NEW DA-LITE 72x96 WALL MOUNT 1.0 GAIN PROJECTOR SCREENS
$99.00
30W Megaphone:Safety Siren:Music:Speaker Mic.- Bullhorn
$15.68
NEW ELECTRIC MOTORIZED PROJECTOR SCREEN 84" 16:9 NR!
$149.99
NEW 30 WATT MEGAPHONE BULLHORN HORN SPEAKER SIREN MUSIC
$15.68
Expo Dry Erase Markers Chisel Tip Low Odor Berry Ink 40
$7.05
95 Gray FIXED FRAME PROJECTOR SCREEN 16:9 WIDESCREEN
$199.98
DA-LITE 6x8 POWER PROJECTOR PROJECTION SCREEN
$99.99
Quartet Dry-Erase Board Magnetic Plastic Frame 9" X 11
$9.98
Lot of 3 SmartBoards SB580 +Pen Tray's
$1050.00
PORTABLE 25 WATT MEGAPHONE w/LOUD SIREN w/MICROPHONE
$23.90
Draper RoadWarrior Projection Screen - USED Once
$100.00
MIMIO Digital Meeting Assistant Whiteboard Interface
$50.99
Transparancy film - write on and ink jet
$1.99
Dry erase Board 3 ft or 4 feet length
$9.99
10W Rally Megaphone / Bullhorn w Speaker Mic. -BULLHORN
$9.41
QUARTET Collapsable Instant Easel,Tripod, Display Stand
$7.99
DUKANE MICROMATIC II FILMSTRIP/SLIDE PROJECTOR+CASSETTE
$20.00
3M ENX 360W Overhead Projector Bulb HA6000-24 "5 LOT"
$35.00
WHOLESALE 250 3M TRANSPARENCY SLEEVES SHEET PROTECTORS
$6.98
LOUD MINI MEGAPHONE ~ PORTABLE MEGA PHONE NEW
$9.95
SAMSUNG SVP-5500 VIDEO PRESENTER VISUALIZER DOC CAMERA%
$220.00
100" 16:9 High-Gain Electric Projector Screen Top Line
$299.98
Casio XJ-S41BB Super Slim Projector
$309.00
Da-lite 60" X 60" MANUAL WALL PROJECTOR SCREEN
$77.95
NEC GT6000 SXGA+ LCD Multimedia Projector - 5300 Lumens
$4299.00
SAMSUNG SVP-6000N VIDEO VISUAL PRESENTER / DOC. CAMERA
$389.00
CCS PD-3012-8 8-Circuit Power Supply 12V 25W
$79.99
Screen Innovations 93" Pull Down Screen
$300.00
Elmo HP-L14 OVERHEAD PROJECTOR - NEW LAMP
$34.99
NIB PIT BULL MEGAPHONE- GREAT FORANY OUTDOOR EVENT
$9.99
Wireless bluetooth Page Up/Down Presentation Pen
$24.99
Elmo HP-285S (HP-285) Overhead Projector
$9.95
3M Overhead Projector 9060 installed lamp + spare
$44.00
SHARP DT300 DLP 1080i Multimedia Projector 1024x576
$41.00
DA-LITE 30x40 PRESENTER 50" COMPACT PORTABLE SCREEN
$216.31
NEW InFocus IN24+ Multimedia DLP Projector MSRP $699
$51.00
3M 9200 Overhead Projector
$19.00
3M overhead projector used/ *working* model 9100
$14.99
C1126J- ELMO Visual Presenter EV-400AF Projector
$51.00
Canon Visualizer RE-350 Document Camera w/MANUAL MUST C
$249.99
hp Color LaserJet Transparency Film C2936A NEW!!!
$19.99
New Toshiba TLP-L2 projector bulb
$206.00
3M 910 LAMP CHANGER OVERHEAD PROJECTOR WITH BULB AND PC
$35.00
3M overhead projector used/ *working* model 9100
$9.99
Elmo EV-6000 Video Visualizer Presenter Document Camera
$299.00
JBL CONTROL 25T SPEAKERS X 2
$69.99
Sparco 18"x24" cork bulletin board
$2.13
NEW - Lot of 6 3M ENX HA6000 projector lamps
$4.99
PORTABLE 25 WATT MEGAPHONE w/LOUD SIREN w/MICROPHONE
$23.90
JVC DLA-M2000SC D-ILA PROJECTOR W/GL-M2915S/G1 LENS
$3299.00
NEW 30 WATT MEGAPHONE BULLHORN HORN SPEAKER SIREN MUSIC
$15.68
4-in-1 Ball Pen +LED Light+PDA Stylus+Laser Pointer
$7.99
Mini Voice Amplifier Megaphone Mega Phone Bullhorn NEW
$14.95
BUHL 120 OVERHEAD PROJECTOR MODEL 3000 LUMENS
$35.99
USHIO DDL/20V150W Halogen Projector Lamp
$0.99
Apollo AI-1000 Professional Overhead Projector, 400 Wat
$34.99
3M 2770 Portable Overhead Transparency Projector
$99.00
Wireless Red Laser Pointer, Remote Control Powerpoint
$13.98
ELMO LCD DLP Projector Stand 3 unit Video Presentation
$75.00
Wireless Red Laser Pointer, Remote Control Powerpoint
$13.98
DA-LITE Floor Podium
$9.99
32 EXPO DRY ERASE MARKERS Vivid Colors!
$14.29
SMP2000 USB Visualizer Video Presenter Document Camera
$179.00
APOLLO OVERHEAD PROJECTOR!!
$1.04
(3) Things to do board w/magnet & (12) Dry Eraser Pen
$0.01
100" 4:3 Electric Motorized Projector Screen Gray
$246.98
3M 9100 FOLDING OVERHEAD PROJECTOR *2 BULBS *2800 LUMEN
$99.00
Restoration Hardware The Mighty Mini Megaphone NIB! WOW
$5.00
18" X 22" FRAMED MAGNETIC CORK/DRY-ERASE COMBO BOARD!
$15.49
3M 9700 OVERHEAD PROJECTOR MODEL: 900AJJ
$49.88
DA-LITE 72x96 WALL MOUNT PROJECTION SCREEN 1.5 GAIN
$162.96
JBL Ceiling Mount 70 Volt Speaker
$15.00
DUKANE SILENT FILMSTRIP/SLIDE PROJECTOR+OPERATING INSTR
$19.99