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Where have the rainbows gone

pragmatic

Distinguished Member
On my DLP projector I use to have it on a coffee table and was shooting up. I had to put a number of cup mats under the front leg to get a height I needed and correspondingly had to have the key stone quite aggerssive.
I would see rainbows quite requently, espectialy when i was tired.
I now have a stand so the projector is now head on (well pointing slightly down) and I haven't seen a single rainbow since doing this. Non of the people I live with have either, although they rerely saw any unless I reminded them that they exist.

So does the angle of the projector/keystone make a big difference or have I just become imune to rainbows over time?
 
S

Spasm

Guest
Component input would be the deciding factor, by using the component signal you are utilising the progressive scan, something that you wouldn't have done using the S-Video connection. This would be the deciding factor in clearing up the rainbows rather than ceiling mounting it!
 

pragmatic

Distinguished Member
The projector has a faruja(sp) chip, so would the component connection utalise this were as the s-vid and composite wouldn't. The signal i'm passing is not progressive, but the chips is ment to do some stuff which turns the signal progressive anyway.
 

Bristol Pete

Well-known Member
I suspect that the rainbows were caused by the cup mats :D

There is a big feature on this over at avsforums :lesson:

Cup matts and projectors = big trouble :suicide:

Cap :)
 

pragmatic

Distinguished Member
Yes you might have a point cap.
Good job i didn't use mug mats or else ...

It's all good though as now there are no rainbows, the only fault i can say is that the black lvl is not as good as it could be, always a white/grey border. I think I would have to upgrade to a CRT to be of a big enough improvement and i can't be bothered with the scaling and all the other crap that would be needed, aswell as the gurder for cieling mounting.
 

Bristol Pete

Well-known Member
What are you using to drive the image.

My Denon 2900 has a mode to change the black level. Changing it to dark ramps up the black massively :lesson:

Just an idea.

Cap :)

Ps , sounds like you struck lucky over the cup/mug differences. Phew :rolleyes:
 

Ray

Active Member
gazbarber said:
I use to have it on a coffee table and was shooting up.

I suspect this sort of activiity would make you see rainbows whether the projector was on or not ! :D
 

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