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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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SONY CINEZA HS10 VIDEO PROJECTOR RETAILS FOR $2,999
$1500.00
NEW ELECTRIC MOTORIZED PROJECTOR SCREEN 150" 16:9 NR!
$289.00
LOUD MINI MEGAPHONE ~ PORTABLE SIZED MEGA PHONE
$8.95
APOLLO CONCEPT 2250 OVERHEAD PROJECTOR
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Apollo 3002 Overhead Projector 3000 Lumen
$99.00
3M Transparency Film for Copiers. Standard 8 1/2" X 11"
$7.51
3M Overhead Projector * NEW BULB * Great for Teachers!
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120" 16:9 High-Gain Electric Projector Screen WhiteCase
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DA-LITE STANDARD FAST FOLD SYSTEM WITH DA-VIEW SCREEN
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110" 4:3 Electric Motorized Projector Screen Gray
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MEGAPHONE 30 WATT W/ MICROPHONE ~ SPORTING BULL HORN
$17.95
RUBBERMAID Three-Shelf AV/Equipment Cart
$19.99
3M Multipurpose Transparency Film *65 Sheets* CG6000
$6.00
Brand New Heart Dry Erase Board
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95 Fixed Frame Projector Screen 2.35:1 White Fabric
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New Box of Highland 901 Clear Transparency Films - 100
$6.51
CANON RE-650-N VIDEO VISUALIZER OVERHEAD PROJECTOR
$249.99
PORTABLE 25 WATT MEGAPHONE w/LOUD SIREN w/MICROPHONE
$23.90
RADIUS VIDEOVISION TELECAST APPLE MAC VIDEO EDITOR
$19.99
Office Aluminum White Board Easel Tripod USA FREE SHIP
$49.99
NEW Four Leg Adjustable Easel Presentation Stand Board
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PRECISION IMAGING PRODUCTS TRANSPARENCY FILM 100pcs.
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Tour Guide's Portable PA Voice Amplifier w/ Microphone
$39.95
10W Megaphone / Bullhorn Music & Speaker Mic. -BULLHORN
$9.41
3M 9080 COLLAPSABLE OVERHEAD PROJECTOR 360W 2500 LUMENS
$31.00
PLANHOLD SAFCO MOBILE PLAN FILE DRAWING HANGING RACK
$99.99
85 Fixed Frame Projector Screen 2.35:1 Gray Fabric
$149.99
NEC VT580
$500.00
48 x 72 Dry Erase White Marker Board Office Classroom
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PORTA SCRIBE OVERHEAD PROJECTOR G100 G 100
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NEW Pro 2xSided Magnetic White board/Presentation easel
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250+ Overhead Projector Transparency Mounting Frames
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New Maximizer Adjustable Easel Presentation Board
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120" 4:3 High-Gain Electric Projector Screen Black Case
$325.98
NEW ELECTRIC MOTORIZED PROJECTOR SCREEN 100" 16:9 NR!
$159.99
NEW 30 WATT MEGAPHONE BULLHORN HORN SPEAKER SIREN MUSIC
$15.68
Peanuts Gang Dry Erase Calendar
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eBeam Digital Whiteboard System
$24.99
Double Sided Rotate Easel Standing Presentation Board
$175.00
MAC G4 800Mhz! OS X LEOPARD! 1GB RAM 160GB HD (2x80GB)
$249.95
3M MODEL 313 OVERHEAD PROJECTOR FOR OFFICE OR STUDIO!
$24.99
Beseler Vu-Lyte III Model 12300 Opaque Projector
$29.99
Expo Combo Board Dry Erase Tack Board 18" x 24" Last 1
$14.99
Expo Vis-A-Vis Wet Erase Markers Black Ink Lot of 12
$5.01
80" 16:9 High Gain High Contrast Projector Screen White
$129.99
32 EXPO DRY ERASE Ultra FineTip MARKERS ASST COLORS
$23.99
Canon RE-650 Video Visualizer
$12.50
PORTABLE 25 WATT PUBLIC ADDRESS + 3 VHF WIRELESS MICS
$139.95
LOUD MINI MEGAPHONE ~ PORTABLE MEGA PHONE NEW
$9.95
LOT OF 4 APOLLO A-EYB PROJECTION LAMPS 360W 8
$34.95
Portable 25 Watt Megaphone w/Microphone w/LOUD Siren
$12.99
Marks A Lot Whiteboard Marker & Eraser Set, Black & Red
$0.99
Dukane 641 Collapsible Portable Overhead Projector
$34.99
Vintage High Power Megaphone Electro-Voice Sherriff
$29.95
NEW 30 WATT MEGAPHONE BULLHORN HORN SPEAKER SIREN MUSIC
$15.68
80" 4:3 High-Gain Electric Projector Screen Black Case
$155.98
NEW 30 WATT MEGAPHONE BULLHORN HORN SPEAKER SIREN MUSIC
$15.68
New TUFFBOX Road Case for 50" PLASMA TV - w/Wheels!
$149.00
Lot of Tektrox Paper, Transparencies & Printer cleaner
$49.99
Expo 14 Piece Dry Erase Set "FREE SHIPPING"
$10.95
BOONE Self Setting Easel Portable Presentation Aid 6410
$6.99
110" 4:3 High-Gain Electric Projector Screen Top Line
$307.98
In/Out Wipe off Board for Office!!! L@@K
$2.99
3M 9100 Overhead Projector Powers Up *Needs Bulb*
$14.99
DA-LITE 84x84 HIGH GAIN (2.5) TRIPOD PROJECTOR SCREEN
$126.10
New! Lot of 5 Student Dry Erase board Boards 8.5 X 11
$14.50
MEGAPHONE 30 WATT W/ MICROPHONE ~ SPORTING BULL HORN
$7.95
New Snap Presentation Kit by Ghent Standing Board
$109.99
90" 4:3 High Gain High Contrast Projector Screen Black
$139.99
NEW Oak Presentation Easel Board Markerboard Adjustable
$168.00
Overhead Projector
$15.00
Expo 2-Sided Dry Erase Board For Kids 8.9" x 11.8"
$4.99
Set of Three Dry Erase Markers n'Eraser for Whiteboards
$4.95
WALLIES- DRY ERASE- WHITE-WITH MARKER---FREE SHIP!
$9.50
96 Fixed Frame Projector Screen 2.35:1 Gray Fabric
$159.99
BUHL Model 200 Portable Folding Overhead Projector
$24.99
DOUBLE-SIDED DRY-ERASE DOORHANGER NEW IN PACKAGE
$3.99
3M Overhead Projector 9200 lamp changer + spare lamp
$49.00
100 16:9 High Gain High Contrast Projector Screen White
$189.99
Dukane USB Video Visualizer Presenter Document Camera
$469.00
NEW 30 WATT MEGAPHONE BULLHORN HORN SPEAKER SIREN MUSIC
$15.68
10W Megaphone / Bullhorn Music & Speaker Mic. -BULLHORN
$9.41
School Office Wall bulletin Corkboard 24" x 36" G08-68
$24.99
Quartet Magnetic Dry Erase Board 19x16
$5.99
NEW MEGAPHONE SIREN MUSIC MICROPHONE BULLHORN SPEAKER L
$42.95
BUHL 80 Overhead Projector *New Bulb* Great for Murals!
$29.95
NEW ELECTRIC MOTORIZED PROJECTOR SCREEN 106" 16:9 NR!
$169.99
NEW PORTABLE 10 WATT HANDHELD MINI MEGAPHONE LOUD SIREN
$11.90
40 Expo Bold Color Dry Erase Markers -Fine pt+FREE DVD!
$18.99
Wireless Presentation Remote Powerpoint Laser Pointer
$34.99
30W Megaphone:Safety Siren:Music:Speaker Mic.- Bullhorn
$15.68
Expo Dry Erase Board 11" x 17" w/ Black Marker & Clip
$2.54
MEGAPHONE 30 WATT W/ MICROPHONE ~ SPORTING BULL HORN
$7.95
Floor Sound Lectern - Podium for audiences up to 2500
$50.00
3M 9700 OVERHEAD PROJECTOR DUAL BULB 4300 LUMENS
$29.99
105 Fixed Frame Projector Screen 2.35:1 Gray Fabric
$219.99
10W Megaphone / Bullhorn Music & Speaker Mic. -BULLHORN
$9.41
120" 4:3 Electric Tab Tension projector screen w remote
$259.00