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Discussion Starter · #1 ·
Hi,


With about 50 hours on my X1 and several configuration changes, I thought I’d share some thoughts about the projector and the rainbow issue, based on my experience.


After following the forums for several months I took the plunge on the X1 and crossed my fingers that rainbows would not be an issue. In our initial haste the X1 was aimed at a white bedsheet until the Parkland Plastics sheet arrived. While the picture on the bedsheet was impressive (aside from the creases ;-), I saw rainbows aplenty. Eye fatigue, as well. I was kind of concerned. My partner experienced none of this, which for some reason didn’t surprise me. Her reaction was mainly “big picture good!†(which was a relief).


I experimented with different video sources – an older Pioneer DV-525 connected via s-video produced lots and lots of rainbows. I did not like this at all. I then tried a laptop (Thinkpad) that was temporarily available. The picture was much cleaner than the output from the Pioneer, and rainbows were lessed, but still very noticeable along with the eye fatigue.


Eventually things came together. We received the Parkland sheet, mounted it to some luan, surrounded the screen with black fabric, and assembled an HTPC with a Radeon 9000 video card and TheaterTek software (800 x 600 @ 62Hz using Powerstrip). This didn’t all happen at once, but over a couple of weeks. Throughout each improvement in environment, the X1 experience improved along with it. Finally, I tweaked the projector a small amount, namely turning the brightness down a small amount, to coincide with the test pattern on the Video Essentials DVD.


With all that said, I’m happy to say that I very rarely see rainbows any longer. And the eye fatigue is completely gone. The rainbows that do appear are much more fleeting, and far less intense, than before. I will see perhaps a handful per film now, and they are of little to no consequence. Contrast that to the initial experience where I was seeing rainbows almost continuously to the point of distraction.


So what’s the explanation? Optical or psychological habituation? Improved video performance from screen/HTPC? Maybe all of these things. I don’t claim to know the answer, but I did want to describe how, in 50 hours of experience and with improvements in video source and viewing environment, the X1 experience can evolve from a rainbow frenzy to an immensely enjoyable viewing experience. In the first week I had doubts about the purchase; now I have none at all, especially at the price. So I just joined NetFlix ;-)


Cheers,

Aaron
 

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Quote:
Originally posted by beagle
) So what’s the explanation?


Good beer? :D
 

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Just to correlate your findings, did you try with your new setup (screen, brigthness settings) to go back to S-video output from your DVD player.


If you see the rainbows: HTPC definitely helps

If you don't: some other factor is contributing to the disappearance of rainbows.


Vincent
 

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Discussion Starter · #4 ·
Vincent,


Becuase my setup evolved through a series of stages, I feel somewhat comfortable making the comparison you describe. The HTPC did reduce rainbows, but it wasn't the only change that did. Incrementally, rainbows were reduced with each 'improvement' in the environment, from the Parkland screen, to masking the screen (the whole wall around the screen, actually) with black fabric, to reducing the X1 brightness level a few notches. All of these helped even before I added the HTPC to the mix. But the HTPC seemed to be the "final nail in the coffin" as far as drastically reducing the rainbows to inconsequential.


Supposedly the X1's color wheel reaches maximum speed at exactly 62Hz. With the HTPC I was able to use Powerstrip to set the resolution to exactly 62Hz, which may be one element I couldn't be sure to achieve using other video sources.


Also, I have a DirecTV receiver connected to the X1 via the composite video, thus bypassing the HTPC entirely. Of course the DirecTV picture is significantly inferior to DVD's from the HTPC in many respects, and it does also exhibit more rainbows.


-Aaron
 

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I think that it probably had more to do with your own acclimation than to the physical changes.
 

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With this progression, you should be able to convince your spouse that crushed velvet drapes, brass railing and a neon marquee will banish rainbows entirely.


Good luck.


Regards,


Matt
 
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