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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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GE Projection Lamp CZX/DAB NIB
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CLASSROOM TEACHER AUCTIONEER LECTERN PODIUM LECTURN
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CLASSROOM TEACHER AUCTIONEER LECTERN PODIUM LECTURN
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Mitsubishi XL-30CM Projector Ceiling Mount XL30CM
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HITACHI 82" STARBOARD WIRELESS WHITEBOARD FX-82W
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Lot of Mixed Projection Lamps NIB
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ONE TOUCH Systems SC200 Site Controller & RK-100 Keypad
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Ask Impact 24 Overhead Presentation LCD Panel
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Christie Digital Systems Vivid LX20 Projector
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Hammermill Premium Inkjet Transparency Film 1000 sht
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Overhead Projector
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Screen Innovations TMS80 80" 16:9 Projector Screen
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80 WATT AMP / SPEAKER PA + 2 VHF WIRELESS MICS + TRIPOD
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Da-Lite 5000 Lumen overhead projector
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3M 2000 Portable Overhead Projector 1600 Lumens NICE!
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Travelgraph L101 L-101 Overhead Projector Good
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110" 4:3 High Gain High Contrast Projector Screen White
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DA-LITE 60x60 HIGH GAIN (2.5) TRIPOD PROJECTOR SCREEN
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3M PORTABLE OVERHEAD PROJECTOR 6200AGA 115V
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OVERHEAD ART OPAQUE PROJECTOR EPISCOPE ENLARGE PICTURE
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Dukane Overhead Projector 28A622A
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3M 9700 Overhead Projector
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Draper M2500 Premier Projector Screen 200112 72x96 NEW
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Dukane Overhead Projector 28A632A
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10W Rally Megaphone / Bullhorn w Speaker Mic. -BULLHORN
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SAMSUNG SVP-6000N VIDEO VISUAL PRESENTER / DOC. CAMERA
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BLANK NAME TAG STICKER LABELS 3.375" X 2.33":313806
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Proxima Model A653 Folding/Portable Overhead Projector
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3M Overhead Presentation LCD Panel 4800
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100" 16:9 High-Gain Electric Projector Screen Top Line
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PORTABLE 25 WATT MEGAPHONE w/LOUD SIREN w/MICROPHONE
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Tour Guide's Portable PA Voice Amplifier w/ Microphone
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3M SCOTCH Model 589 Slim Portable OVERHEAD PROJECTOR
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18" X 24" FRAMED HOME DECOR MAGNETIC DRY ERASE BOARD
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Mitsubishi XL-30CM Projector Ceiling Mount XL30CM
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NEW PORTABLE 10 WATT HANDHELD MINI MEGAPHONE LOUD SIREN
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10W Rally Megaphone / Bullhorn w Speaker Mic. -BULLHORN
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106 Fixed Projector Screen Silver Frame 16:9 Gray Fab
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Expo Magnetic Dry Erase Board Set 18" x 24" Whiteboard
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Samsung UF80ST Digital Presenter - NEW
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LABELS - NAME BADGE LABELS 3.375" X 2.33" LABELS:313806
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Apollo Projection Lamp DEK NIB
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PictureTel StarCast VM4000 Video Conferencing System
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3M Briefcase Style Overhead Projector - Model #6200AGB
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PICTURETEL VENUE 2000 Video Conferencing Computer NR
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HISONIC HS210 UHF 32 CH 20W PORTABLE PA + WIRELESS MICS
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DA-LITE FLYER 40X40 TRIPOD PROJECTOR PROJECTION SCREEN
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INFOCUS IN24 SERIES OVERHEAD PROJECTOR.
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Dukane Overhead Projector 663
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NEW ELECTRIC MOTORIZED PROJECTOR SCREEN 150" 16:9 NR!
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23 x 35 IN FRAMED MAGNETIC DRY ERASE BOARD CALENDAR NEW
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Wireless Red Laser Pointer, Remote Control Powerpoint
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SONY VIDEO VID-P110 VIDEO PRESENTATION STAND S VIDEO
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PORTABLE 25 WATT MEGAPHONE w/LOUD SIREN w/MICROPHONE
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3M 9080 Overhead Projector 2500 lumen w/Wide angle lens
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3M Overhead Projector 9050
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Lot of 3 Apollo FXL Overhead Projector Replacement Lamp
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2 NEW COMPACT POCKET MINI MEGAPHONE CHEER SPORTS SIREN
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LOUD MINI MEGAPHONE ~ PORTABLE MEGA PHONE NEW
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48" x 96" ALUMINUM FRAMED DRY ERASE BOARD WITH TRAY NEW
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PORTABLE TRIPOD STAND PROJECTOR SCREEN
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White Board/Printer Panasonic UB 5310 use with/w/o PC
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SAMSUNG SVP-4200N Visual Presenter Doc Camera w/ Extras
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PLUS U2-870 Portable Projector Digital Multimedia
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Overhead Projector w/ Working Bulb & No Scratch Glass
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NIP Expo Dry Erase Markers Eraser Cleaner Board LowOdor
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ELMO P30S DIGITAL VISUAL PRESENTER - OVERHEAD PROJECTOR
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Da-Lite, Wooden Podium w/Timer, Reading Light and Clock
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Expo Dry Erase Board 8.5" x 11" w/ Black Marker & Clip
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Califone MB-350 Mounting bracket for PA-300 Plus spkr
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Expo Magnetic Silver Dry Erase Board 5" x 7" w/ Marker
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