A good idea but then it's a different beast altogether, it's a classical scanning laser display, and you must have only one steerable (or rotating multifaceted, one facet per line) mirror per laser source, not an array of micromirrors. The problem with scanning laser displays is that for a given display luminosity laser light is much more expensive than the light bulbs used in DLP displays. And less energy-efficient too I would think, even when taking into account the DLP's light dumping losses in question.
Michel ----- Original Message ----- From: "Robin van Spaandonk" <[EMAIL PROTECTED]> To: <vortex-l@eskimo.com> Sent: Monday, January 08, 2007 3:20 AM Subject: Re: [Vo]: Optics question > 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. >
