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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.

Presentation, AV, Projectors Items

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DA-LITE INSTA-THEATER LITE HDTV 60" PORTABLE SCREEN
$237.65
106" 16:9 Electric Tab Tension projector screen +remote
$349.00
NEW ELECTRIC MOTORIZED PROJECTOR SCREEN 106" 16:9 NR!
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NEW 30 WATT MEGAPHONE BULLHORN HORN SPEAKER SIREN MUSIC
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NEW 30 WATT MEGAPHONE BULLHORN HORN SPEAKER SIREN MUSIC
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40 inch Ultra Portable Table Top Projector Screen 4:3
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NEW MEGAPHONE 30 WATT SIREN MUSIC MIC BULLHORN SPEAKER
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NAME BADGE LABELS 3.375" X 2.33" LABEL :313806
$14.28
NEW Slim 50" Matte White Console Portable Tripod Screen
$105.00
3M 9100 OVERHEAD PROJECTOR
$39.99
ECLIPSE AI -2000 SERIES OVERHEAD PROJECTOR
$19.88
Canon RE-650 Video Visualizer
$20.50
Proxima PL-300 Projection Link
$250.00
Ricoh overhead projector
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92 Fixed Projector Screen Silver Frame 16:9 Gray Fabri
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Floor Sound Lectern - Podium for audiences up to 2500
$100.00
Folsom Research ScreenPro FC-0608
$510.00
LOUD MINI MEGAPHONE ~ PORTABLE SIZED MEGA PHONE
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MAGNETIC 24X18 DRY ERASE BOARD w/ ALUMINUM FRAME
$10.45
110" 4:3 High Gain High Contrast Projector Screen Black
$219.99
Infrared IR Pen Wiimote Whiteboard
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120" 16:9 High-Gain Electric Projector Screen WhiteCase
$351.98
NEW Pro 2xSided Magnetic White board/Presentation easel
$229.00
BUHL Model 200 Portable Folding Overhead Projector
$24.99
DA-LITE 84x84 HIGH GAIN (2.5) TRIPOD PROJECTOR SCREEN
$126.10
PORTABLE 25 WATT PUBLIC ADDRESS + 3 VHF WIRELESS MICS
$139.95
6 DRY ERASE MARKERS W/ ERASERS -MORE IN STORE**********
$2.99
ELMO HV-110XG Portable / Mobile Visual Presenter
$223.50
10W Megaphone / Bullhorn Music & Speaker Mic. -BULLHORN
$9.41
Movie Projector and Screen
$200.00
COUNTRYMAN E6 ISOMAX WIRELESS MICROPHONE-USED
$219.99
LOUD MINI MEGAPHONE ~ PORTABLE MEGA PHONE NEW
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MEGAPHONE 30 WATT W/ MICROPHONE ~ SPORTING BULL HORN
$17.95
LOUD MINI MEGAPHONE ~ PORTABLE MEGA PHONE NEW
$9.95
NIB PIT BULL MEGAPHONE- GREAT FORANY OUTDOOR EVENT
$9.99
FlipChart Porcelain Easel, Da-Lite
$100.00
NEW ELECTRIC MOTORIZED PROJECTOR SCREEN 150" 16:9 NR!
$289.00
PORTA SCRIBE OVERHEAD PROJECTOR G100 G 100
$21.01
3M 1711 OVERHEAD PROJECTOR w/ WORKING LAMP ~2500 Lumens
$34.99
NEW MEGAPHONE SIREN MUSIC MICROPHONE BULLHORN SPEAKER
$42.90
3M 4550 Transparency Maker- Tatto Stencil Maker
$355.00
90" 4:3 Electric Motorized Projector Screen Gray
$199.98
military megaphone bullhorn Public Address Set AN/PIQ-5
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Hewlett Packard C3834A Premium InkJet Transparency Film
$24.99
Buhl 9014ED Series Overhead Projector with Working Lamp
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NEW ELECTRIC MOTORIZED PROJECTOR SCREEN 84" 4:3 NR!
$10.50
92" 16:9 High Gain High Contrast Projector Screen Black
$149.99
BOONE Self Setting Easel Portable Presentation Aid 6410
$6.99
ELITESCREENS T85UWS1 85" (4:3) PROJECTOR SCREEN W/STAND
$36.00
Portable 25 Watt Megaphone w/Microphone w/LOUD Siren
$12.99
30W Megaphone:Safety Siren:Music:Speaker Mic.- Bullhorn
$15.68
Mimio Virtual Ink Digital Whiteboard DMA-01
$52.95
135" 1:1 Square Manual Pull Down Projector Screen
$111.98
WolfVision VZ-8Plus Visualizer
$100.00
NEW ELECTRIC MOTORIZED PROJECTOR SCREEN 100" 16:9 NR!
$159.99
MEGAPHONE 30 WATT W/ MICROPHONE ~ SPORTING BULL HORN
$7.95
FlipChart Porcelain Easel, Da-Lite
$100.00
92" 16:9 High Gain High Contrast Projector Screen Black
$149.99
Mimio electronic whiteboard serial version
$53.00
NEW ELECTRIC MOTORIZED PROJECTOR SCREEN 150" 4:3 NR!
$269.00
MEGAPHONE 30 WATT W/ MICROPHONE ~ SPORTING BULL HORN
$17.95
Zelar Transparency Film For Plain Paper Copiers 100 PCS
$4.85
90" 4:3 High Gain High Contrast Projector Screen White
$139.99
APOLLO Overhead Projector *NEW BULB* Great for Teachers
$34.95
ELMO EV-2000AF VIDEO PRESENTER - REMOTE
$249.00
4 x 6 Dry Erase White Marker Board Office Classroom
$156.99
100" 16:9 High-Gain Electric Projector Screen BlackCase
$246.98
3M 955 3800 Lumens High Quality Overhead Projector
$24.95
Set of Three Dry Erase Markers n'Eraser for Whiteboards
$4.95
DOUBLE-SIDED DRY-ERASE DOORHANGER NEW IN PACKAGE
$3.99
NEW! MEGAPHONE MUSIC SIREN MICROPHONE BULLHORN SPEAKER
$24.90
PRECISION IMAGING PRODUCTS TRANSPARENCY FILM 100pcs.
$0.99
NEW 30 WATT MEGAPHONE BULLHORN HORN SPEAKER SIREN MUSIC
$15.68
AOSOM PORTABLE PROJECTOR PROJECTION SCREEN 60"X60" NEW
$99.99
120" 4:3 Electric Tab Tension projector screen w remote
$259.00
Expand Showroom ''Quickscreen'' Tradeshow Display
$29.99
COMBO 50 & 15 WATT LAW ENFORCEMENT BULLHORN MEGAPHONE
$42.99
Office Depot Inkjet Printer Transparency Film
$21.01
100 inch Tab Tension Super Flat Projector Screen 4:3
$475.98
FlipChart Porcelain Easel, Da-Lite
$100.00
135" 1:1 Square Manual Pull Down Projector Screen
$111.98
Office Depot Inkjet Printer Transparency Film
$6.53
Tour Guide's Portable PA Voice Amplifier w/ Microphone
$39.95
ELMO EV-368 Visual Presenter
$62.00
Canon RE-350 Video Visualizer
$151.50
Dukane 28A653 3000 Lumen Overhead Projector
$64.95
Peanuts Gang Dry Erase Calendar
$2.99
3M 9700 OVERHEAD PROJECTOR DUAL BULB 4300 LUMENS
$61.00
MEGAPHONE 30 WATT W/ MICROPHONE ~ SPORTING BULL HORN
$7.95
APOLLO VENTRA 4000 ULTRA PORTABLE OVERHEAD PROJECTOR
$34.95
10W Megaphone / Bullhorn Music & Speaker Mic. -BULLHORN
$9.41
3M Overhead Projector * NEW BULB * Great for Murals !
$34.95
MEGAPHONE 30 WATT W/ MICROPHONE ~ SPORTING BULL HORN
$7.95
Expo Vis-A-Vis Wet Erase Markers Black Ink Lot of 12
$8.00
Casio OH-260 Scientific Calculator -Overhead Projector
$1.25
Dukane 28A663 3000 lumen Overhead Projector Refurbished
$69.95
NEW 30 WATT MEGAPHONE BULLHORN HORN SPEAKER SIREN MUSIC
$15.68
NAME BADGE LABELS 3.375" X 2.33" LABEL :313806
$14.28