Wobulation (1 Viewer)

[Lee Carbray]

http://www.hp.com/hpinfo/newsroom/pr...4/040609a.html

I am no projection expert and I know HP does not make their projectors for HT use. I just though this would intrest some. Would it benefit HT at all?

 

[Allan Jayne]

In some ways, Wobulation(tm) is analogous to interlacing. Except that a DLP(tm) device could produce sub-images (you might say, video fields) faster than today's interlacing standards. DLP is fast enough so that with Wobulation there can be an odd field and and even field for every incoming video frame thus not introducing motion artifacts.

There is no reason why the swinging mirrors on the DLP panel can't have two or more active positions as well as the swing away position for black (which I think Wobulation is). Among other things, Wobulation can hide the screen door effect, since the alternate sub-image position(s) will cover each other's inter-pixel boundaries. Actually, the inter-pixel boundaries have to be wider as in real interlacing so the added resolution is not softened out due to pixel overlap.

To reduce the visible of rainbow fringes, today's DLP projectors generate 180 video frames (60 of each color) per second or more. I suppose that it is not necessary to double or triple that (and the color wheel rotation) for Wobulation but rather the existing frames at the same frame rate would be staggered perhaps half a pixel.

Video hints:
http://members.aol.com/ajaynejr/video.htm