What makes the best-performing projection viewing surfaces? Our chemists and quality team have conducted a lot of research into this question. We’ve developed viewing surface solutions designed to deliver the best possible image in a variety of projection environments.
But we’ve also given a lot of attention to innovation on the edges, making sure the surfaces are flat, easy to use, and reliable over the long term. Here are three problems we’ve solved on the edges of viewing surfaces:
So long to snap struggles.
One weakness of folding and fixed projection screens was the method of viewing surface attachment. It can be tough to get the snaps together or pull them apart. You can also tear the viewing surface when trying to stretch it far enough for the snaps to align.
Draper’s DuraLoop completely eliminates snaps and tensions the surface in a new way. The viewing surface attaches to the perimeter frame with DuraLoop bungee cords. This system provides a self-centering, perfectly flat viewing surface for better image quality. It is also field-repairable.
Taking the heat.
Fixed frame screens provide a very flat viewing surface for the best image possible. Screen frames utilizing snaps are a bit more difficult to tension uniformly around the frame. Draper tackled this by developing a fabric retention system that enables uniform tension to the entire surface area, without tools, to provide a truly flat viewing surface in seconds. In addition, this system allows the tension to be adjusted slightly if the material has relaxed a little due to an overheated room or high humidity. The system is available on Draper’s Onyx and Clarion fixed frame screens.
Preventing pulled tabs.
Another way to keep the viewing surface flat is a tab-tensioning system. This system uses a thin cord running down each side of the screen through tabs, attached to the roller at the top and the dowel at the bottom. The cords are tightened, creating a flat viewing surface.
Most manufacturers use adhesive to attach these tabs, which can lead to “popped” tabs when the constant tension proves too much for the adhesive to handle. In addition to ruining the tension and impacting surface flatness, a “popped” tab can leave sticky residue, which will ruin the screen.
Draper’s tab-tensioned screen surfaces and tabs are cut on Computer Numerical Control (CNC) cutting tables, which means every cut is made with digital precision. Tabs are then folded to the backside of the screen and Radio Frequency (RF) welded. The result is a much stronger tab with no possibility of separation. Our testing indicates the RF seal is in most cases stronger than the screen material itself.
To find our tab-tensioned electric projection screens, click here and click the “tab-tensioned surface” filter on left side of the page.
Source: Blog Posts