In reply to Hoyt A. Stearns Jr.'s message of Sat, 6 Jan 2007 17:41:40 -0700: Hi, [snip] > > >In a digital light processing (DLP) display, a light source (soon to be a >tri color laser) projects on an array of movable mirrors. The light for the >dark parts of the image are sent to a beam dump. That seems wasteful. Is >it possible to collect that light and re-introduce it into the primary >source?
Instead of using the mirrors to direct the beam to a beam dump, simply turn the laser off for a fraction of a second. This will require a change in the logic and electronics, but is much more efficient (instead of recovering the energy, it is simply not used in the first place). It also means that the mirrors can continue to scan the line, maintaining momentum. Then the mirrors need not be as easy to maneuver, which is technically simpler and cheaper to implement, as well as resulting in a more robust design that produces a better quality image. Regards, Robin van Spaandonk http://users.bigpond.net.au/rvanspaa/ Competition provides the motivation, Cooperation provides the means.
