Front Projector Distance
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kinect with projector some tips how to set up
what front projector screen size?
The distance from sitting area to screen will be 11-12 ft. What is the maximum screen size I should get? I am getting a 1080p front projector for blu-ray movies if that helps.
The maximum screen size as well as screen performance depends on several factors, which include:
• The interior dimensions of your viewing environment;
• The placement of the projector (governed in part by the lens shift function (if so equipped) and the throw distance. The latter is dependent on the focal length and the zoom ratio of the lens);
• The post optimization and/or calibration light output of the projector;
• The peak gain of the screen;
• The resolution of the projected image;
• The (corrected) visual acuity of the viewer(s);
• The ability to control the amount of ambient light in your viewing environment;
• The video and image processing performance of the projector or outboard video processor;
• The performance of the video source equipment;
• The source material;
• And last but not least your budget.
You will want to choose a quality projection screen that is optimized for HD video projectors, which has an aspect ratio of not less than 16:9 and a peak gain between 0.9 and 1.4. Keep in mind that the higher the screen gain the narrower the viewing angle (aka viewing cone) before you hit the half-gain point. This will be important if you expect to accommodate up to several people in the room at any given time. You should also give consideration to using a gray, high contrast screen if there will be any ambient light present during viewing. You will also want to use a black velour or velvet screen frame finish or masking, i.e. border, that absorbs over-scan, which helps to increase perceived contrast.
Realistically there are few consumer-oriented video projectors under roughly US$10,000 that will allow you—even under the best of conditions—to project a (16:9) HD video image larger than 120 inches diagonally while maintaining a sufficiently bright, reasonably uniform image that possesses good contrast and minimal color shift over a viewing angle of more than 50 to 60 degrees.
At a viewing distance of 11 to 12 feet, for one or more viewers possessing normal visual acuity viewing a 1920 × 1080p video image of good image quality, you will want to use a 16:9 (or even a 1.85:1) aspect ratio screen with a diagonal size of approximately 84 to 90 inches give or take no more than roughly 6 inches; providing your projector and room dimensions will accommodate a screen size in this range. (Note: using a native 1920 × 1080p “Full HD” DLP or LCOS video projector will allow you to fudge a little toward the higher end of the screen-size range. If you’re using a Full HD 3LCD video projector you should limit yourself to a slightly smaller maximum screen size, e.g. no greater than 90 inches, especially if there will be any ambient light in the room.) For a brief list of the more popular projection screen manufacturers please see my answer to the Yahoo! Answers question titled “What is best screen for Optoma HD80,” to which I’ve provided a link below.
I strongly encourage you to use the popular interactive Projection Calculator Pro utility on ProjectorCentral’s Website to verify which screen size, screen gain and projection variables will provide the best performance for your viewing environment. Just remember that the reported Image Brightness value is based on the projector manufacturer’s often exaggerated and unrealistic brightness or light output specification.
######################## RESOURCES ########################
Planning and Setting Up a Front-Projection Home Theater
http://www.isftv.com/Article_Planning_and_Setting_Up.html
Projection Calculator Pro - Throw Distance and Screen Size
http://www.projectorcentral.com/projection-calculator-pro.cfm
Viewing Distance Calculator
http://www.myhometheater.homestead.com/viewingdistancecalculator.html
Screen Size vs. Viewing Distance vs. Resolution
http://www.carltonbale.com/2006/11/1080p-does-matter/
Screen size versus Optimum Viewing Distance
http://www.practical-home-theater-guide.com/Tv-viewing-distance.html
[PDF] Specifying Projection Screens in Six Easy Steps
http://www.cinemasource.com/articles/screens_six_steps.pdf
[PDF] Types of Home Theater Projection Screens
http://www.cinemasource.com/articles/screen_types.pdf
THX Home Theater Display Setup
http://www.thx.com/home/setup/display.html
THX Certified Cinema Design - Screen Placement
http://www.thx.com/cinema/builtTHX/screen.html
[PDF] THX Theatre Alignment Program (TAP) Guidelines
http://www.thx.com/library/pdf/guidelines.pdf
[PDF] Research on Human Factors in Ultra-High-Definition Television to Determine its Specifications
http://www.nhk.or.jp/digital/en/technical/pdf/IBC2007_08040906.pdf
Practical Projection Pointers
http://motion.kodak.com/US/en/motion/Hub/projectionPointers.htm
How to determine BEST screen size for home theatre projector viewing?
http://answers.yahoo.com/question/index?qid=20071121170743AAnVZ3T
300-inch projector [screen]?
http://answers.yahoo.com/question/index?qid=20070412204130AA58dGc
What is best screen for Optoma HD80? What size best image?
http://answers.yahoo.com/question/index?qid=20090226095949AATpahf
General home theater projector questions and...
http://answers.yahoo.com/question/index?qid=20090213080745AAdJG1N
What is good distance to watch 42 inches television?
http://answers.yahoo.com/question/index?qid=20070530083548AA33IHN
HDTV Display Technology Shoot-Out
http://www.displaymate.com/shootout.html
Display Technology Shoot-Out
Comparison of CRT, LCD, Plasma, DLP and LCoS Technologies
http://www.displaymate.com/ShootOut_Comparison.htm
