If this is front projection, you must keep any additional lighting from falling directly onto the screen. Normal boardroom lighting requires about 80 advertised lumens, MINIMUM, for a usable 10:1 contrast ratio, per square foot of screen space.
1080p is great, but most commercial projectors are actually 1920x1200 resolution. A bit higher than 1080p, but this allows for a 16:9 or a 16:10 screen to be used. I recommend a 16:9 screen.
Your screen size is about 82 square feet, which asks for a 6,500+ lumen projector as a minimum.
Your throw distance really isn't that 'short' overall. It's more than 1.0, and while it is 'shorter', you have many options out there with projectors, that don't require you buying EXTREMELY pricey short throw lenses. Many times the short throw lenses require the projector to be dead center of the screen, which often isn't ideal.
Anyway, here's a starting point list:http://www.projectorcentral.com/projectors.cfm?g=1&hide=0&st=1&r=16&br=5500&br=16000&c=&w_m=&ar=Wide+%2816%3A9-10%29&db=&zr=&wt=<g=&ll=&mfg=&p=&wr=&dt=&t=&pjl_m=&pjw_m=&pjh_m=&td_m=3.8&is_m=350&i=w&tr=&tr2=&oop=2&sort=%24&sz=15
I have the brightness a bit lower than recommended, so I would look at brighter models on that list.
This model, in particular, jumps out at me:http://www.projectorcentral.com/Epson-Pro_G7905U.htm
The calculation shows that it can be as close as 3.6m lens to screen for a 3.5m wide screen.http://www.projectorcentral.com/Epson-Pro_G7905U-projection-calculator-pro.htm?td_=12%2E467191601&id_=162%2E494748606&l_=2132
It also offers a slightly shorter throw lens which may be used which can throw that same 3.5m width from 3m to 3.7m lens to screen.
Since the projector is about 53cm deep, you should be able to use the first lens without issue.
Eiki also has a nice offering here:http://www.projectorcentral.com/EIKI-EK-610U.htm
Which has a nice shorter throw lens which can do the size from 3.3m to 4.3m and has a depth of 45cm.
There are many good options, but I would likely avoid DLP on this as the color brightness for video is likely to be less than half the rated brightness which will not be good for your setup. UNLESS: You get 3-chip DLP.
LCoS would be acceptable as well, but the Canon REALiS may be too dim for your needs at 6,000 lumens.
I have no idea of your budget, but this request you have made is for a non-standard image size in a limited flexibility installation. It will impact budget due to these requirements and budget needs to be set accordingly.
You will need an acceptable screen to go along with this as well. I would recommend something with minimal gain and perhaps grey to help increase contrast a bit. I don't believe you will find much in the way of ALR screens at that size (ALR: Ambient Light Rejecting).
- Theater, whole house audio, and technology consultation during the build and installation process in the Washington, DC metropolitan area.