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Q & A: Ceiling-Mounted Front-Projection Display

I'm currently trying to find a solution to a ceiling-mounted, front-projection display in a high-end retail store that can project an image about 8-feet-wide by 6-feet-high. The video screen wall is approximately 12-feet-wide by 8-feet-high, and the ceiling height is approximately 8 feet high. The video display area is located in the corridor pathway, which means customers could possibly walk through the projector's light path with the low ceiling?

Q: I'm currently trying to find a solution to a ceiling-mounted, front-projection display in a high-end retail store that can project an image about 8-feet-wide by 6-feet-high. The video screen wall is approximately 12-feet-wide by 8-feet-high, and the ceiling height is approximately 8 feet high. The video display area is located in the corridor pathway, which means customers could possibly walk through the projector's light path with the low ceiling.

— Greg Brion, Jr., principal, Innovative Sound & Vision LLC, Mineola, NY

A: Because this is a high-end retail store, having a projector on a pole in the middle of a corridor with high customer traffic would be an eyesore, and could create a hazard with people walking in the way of the projector's light path. My recommendation would be to go with rear screen projection. You would only need approximately 5 feet of space behind the wall you want to project onto. This keeps the projector out of harm's way, and also takes away any potential hazard because it's only an 8-foot ceiling. I would use a reliable projector with a short-throw lens that can run for up to 12 hours a day.

— Peter Brown, CTS, director of audio visual implementation, IVCi, Hauppauge, NY

Next month's question: I have a video scaler that I use to feed a projector. As expected, the image from the video source is delayed by the processing, so I've acquired an audio delay to sync things back up. Has anyone done this before and measured the actual video delay with this unit? I've eye-balled it for now, but would like to get a more exact number.

— Mark Wyse, director of theatrical arts, Blackhawk Church, Madison, WI

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