| Author | Message | ||
     Anonymous Rating: N/A |
I'm a little confused about projectors and 3-D. Is it true that a standard projection system will display shutterglasses 3-D, but only at 60hz? What exactly does 60hz mean? Is it similiar to frames per second? Don't ntsc tvs work at 60hz, and if that is true then why couldn't the projector display 3D vhs tapes the same way as a ntsc television? Is 60hz only a problem because of flicker? | ||
| Ray Price Rating: N/A |
60hz is the rate at which the image is drawn on the screen, which is not the same as the frames per second. Images are drawn on the screen line by line starting from the top down to the bottom. This means for a 60hz signal this entire scan of the screen happens 60 times a second. Problem you are referring to depends on what type of projector. For DLP projectors, even though the scan rate given to the projector may be 60hz, the actual scan rate drawn may be slower because color wheel inside that spins to draw the different colors may be slower. For LCD the problem lies in the fact that the LCD pixels take a while to die out after they have been told not to draw, this results in ghosting which renders then pretty useless for page flipped 3d stereo. At least, that is my amateur understanding of how it works. Someone else may be able to give a better interpretation. Hope this helps. | ||
| Anonymous Rating: N/A |
Ok, so LCD projectors can not do page flipped 3D. What about interlaced? | ||
| Christoph Bungert (Admin) Rating: N/A |
Many (most?) LCD and DLP projectors do 60Hz page-flipping. That's what the Sensio3D product is based on. http://www.stereo3d.com/sensio3d.htm A major problem is the sync, but Sensio compensates for this. Interlace is a special kind of page-flipping where each field only contains half of the lines. So it poses pretty much the same problems. Christoph | ||
| Anonymous Rating: N/A |
Ok, this isn't completely related to 3D, but if a projector says it is HDTV compatible but can only handle 1024 x 768, isn't it lowering the quality of the HDTV signal? What is the benefit of that? The projector I'm talking about is this one: http://www.projectorpeople.com/projectors/projspec.asp?itemid=8365&itmname=Sanyo+PLC%2DXU45 It is $2,699.00. Do more expensive projectors exist that display full 1080i HDTV resolution? What is the cheapest I could buy one of those for? Why do some HDTV tv sets only display 720i but are still considered HDTV? | ||
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