Projector Selection GuidelinesThere are three basic guidelines in choosing a projector for your event. Resolution, brightness and screen size. Resolution Resolution is the number of pixels on the display with the horizontal number shown first, followed by the vertical number (1200 x 800). The pixel number increases with higher resolution SXGA+ and UXGA screens. While the overall appearance of documents and photos is greatly improved with higher resolution, fonts, icons and graphic elements appear physically smaller. Higher resolutions allow for greater image detail and more workspace, which is great for CAD drwaings, spreadsheets and critical color accuracy. The three most common display resolutions for a projector and monitor are SVGA, XGA, and SXGA. How to Choose Projector Resolution XGA: 1024x768: If you plan to use your projector for: presentations with san-serif text 12pts or larger & low to meduim resolution photo or jpg images. XGA+ or SXGA+ or UXGA If you plan to use your projector for: presentations with san-serif text 7pts or larger, meduim to high resolution photo or jpg images, CAD drawings or spreadsheets. A display with a higher pixel count has a higher resolution. And, a display with fewer pixels has a lower image resolution. The higher the resolution in a projector and monitor, the more detail you'll see. Common Projector Resolutions Name/Resolution/Pixels/Colors/Description VGA 640 x 480 307,200 16 colors from a palette of 256 Video Graphics Array SVGA 800 x 600 480,000 16,777,216 colors ‚Äö?Ñ?¨ "True Color" Super VGA XGA 1024 x 768 786,432 16,777,216 colors ‚Äö?Ñ?¨ "True Color" Extended Graphics Array SXGA 1280 x 1024 1,310,720 16,777,216 colors ‚Äö?Ñ?¨ "True Color" Super XGA UXGA 1600 x 1200 1,920,000 16,777,216 colors ‚Äö?Ñ?¨ "True Color" Ultra XGA QXGA 2048 x 1536 3,145,728 16,777,216 colors ‚Äö?Ñ?¨ "True Color" Quantum XGA So if you wish to order a projector for presentations that has san-serif text 12pts or larger & low to meduim resolution photo or jpg images, you would ask for "an XGA capable projector". Projector Brightness Once the resolution is chosen, you must select how bright the projector needs to be to effectively project in the environment you will present in (measured in ANSI lumens). The higher the ANSI lumnen rating, the brighter the image. 1000-1500 lumnens: If you plan to use your projector for: audiences of 15pp or less, 6' tripod screen or smaller and low ambient light. 1500-2000 lumnens: If you plan to use your projector for: audiences of 40pp or less(theater & classroom style), 8' tripod screen or smaller and low to medium ambient light. 2000-2500 lumnens: If you plan to use your projector for: audiences of 100pp or less(theater & classroom style), 7x10 screen or smaller and medium ambient light. 3000-3500 lumnens: If you plan to use your projector for: audiences of 125pp or less(theater, classroom & banquet style), 9x12 screen or smaller and medium ambient light. So if you wish to order a projector for presentations that has san-serif text 12pts or larger and for audiences of 40pp or less, you would ask for "an 1500 lumen XGA capable projector". Screen Size & Placement After you have chosen the resolution & brightness, the final consideration is screen size and placement. As a general rule, The first row of seats should be no closer than 1.5X the width of the screen and the last row should be no further away than 6x the width of the screen. ex: for a 6‚Äö?Ñ?¥x8‚Äö?Ñ?¥ screen: first row starts at 12‚Äö?Ñ?¥ from screen, last row ends at 48‚Äö?Ñ?¥ from screen ‚Äö?Ñ¬¢ In rooms with large audiences, the bottom of the screen should be at least 4‚Äö?Ñ?¥, preferably 5‚Äö?Ñ?¥ from the floor ‚Äö?Ñ¬¢ Sessions with anticipating heavy "foot traffic" should try to raise the bottom of the screen at least 6' off ground Floor space required for projection Here is a quick formula used to calculate the minimum space needed for front projection Take the screen width and multiply by 1.5 and add 4-8 feet. ex: for a 6‚Äö?Ñ?¥x8‚Äö?Ñ?¥ (height x width) screen: 8‚Äö?Ñ?¥ (height) x 1.5 = 12‚Äö?Ñ?¥ 12‚Äö?Ñ?¥+ 4‚Äö?Ñ?¥-8‚Äö?Ñ?¥= 16-20‚Äö?Ñ?¥ distance needed between the projector and screen.
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