Colour casts on UST ALR screens? - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 
Thread Tools
post #1 of 8 Old 01-28-2020, 10:47 AM - Thread Starter
Newbie
 
Join Date: Jan 2020
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 0
Question Colour casts on UST ALR screens?

Hi there everyone,

I've been lurking around for a while and decided to make an account and ask a deeply concerning question. This is my firs time building out a HT experience with a projector/screen.

So here's the situation:

I have the Optoma Cinemax P1 projector (love it) and am looking to get a fixed frame UST ALR screen. I got screen samples from the following:
  • XY Screen (Crystal PET)
  • Draper (XH800X)
  • Elite Screen (Starbright CLR for AR120H CLR)
  • Da-lite (Parallax UST 0.45)

...and I put them all up on the wall to see how they perform side by side.

The Draper was the least impressive compared to the others, and to be honest, I can't tell the difference between the other screens. It seems like they're all the same screen to me but maybe my eyes aren't trained on what to look for?)

While they all performed well with the lights on and brought back lots of contrast/colour/etc, they all shared the same redish-purpleish colour cast which was really worrisome. It was mainly noticeable in the highlights. White clouds and snow were all purple-like and not really white at all. I have some pictures here I took of running some sample HDR youtube videos and playing Death Stranding on my PS4 Pro in HDR mode and the snow looks noticeably off-colour. I've attached picture (some with lights on, some off).

One thing to note: my walls are a kind of super light blue and I understand that may be playing a role here, however when I simply cast onto the wall with the lights off it looks far better than the ALR UST screen (colour-shift wise, and especially with the whites).

For comparison's sake, I connected my PS4 Pro to my HDR monitor and played Death Stranding on it to see how the whites should be looking, and they're crisp and white bright, no colour cast of any sort that I might have confused with 'how the original content is supposed to look like'.

I don't think this is normal for ALR UST screens as I've seen other people post videos/pictures of their set up with UST ALR screens and their whites look fine. Is there something here I'm not taking into consideration? My fear is that I'll pay for a 120" fixed frame screen, set it up, and then have this blueish-purplish colour cast for everything I view.

Thank you for any insight you can share and taking your time to reply. I hope I followed the posting guidelines properly.
Rayyan S is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 01-28-2020, 10:49 AM - Thread Starter
Newbie
 
Join Date: Jan 2020
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 0
Oh, looks like I can't attach files or links. Hopefully the description helps?
Rayyan S is offline  
post #3 of 8 Old 01-28-2020, 12:19 PM
Advanced Member
 
bdht's Avatar
 
Join Date: Aug 2016
Posts: 857
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 416 Post(s)
Liked: 176
Try going to Image Settings > Color Settings > RGB Gain/Bias, and reducing the blue gain. Those screens often have a blue push.
bdht is online now  
Sponsored Links
Advertisement
 
post #4 of 8 Old 01-28-2020, 07:26 PM
Member
 
Run&Gun's Avatar
 
Join Date: Aug 2008
Posts: 163
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 45 Post(s)
Liked: 25
I have an LG HU85 paired with the Elite Screens 120" UST CLR and the picture is great. I'd lean towards it being a projector issue/setting.
Run&Gun is offline  
post #5 of 8 Old 01-29-2020, 07:39 AM - Thread Starter
Newbie
 
Join Date: Jan 2020
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 0
Hi all,

Thank you for the quick replies. Now that I can share links can you please have a look at the below and let me know if it's still a matter of me having to re-calibrate the image to the screen (and not an issue with the screens themselves)?

https://ibb.co/h1F188R
https://ibb.co/qmdmcfY
https://ibb.co/6FLvdmh
https://ibb.co/2Kq2qFd
https://ibb.co/0sG89gh
https://ibb.co/LR0hFmV
https://ibb.co/y01J8R3
https://ibb.co/CKwPBwM

I'm a bit scared to play with the colour settings so I just want to make sure that's the proper route first before I go changing things.

Thank you
Rayyan S is offline  
post #6 of 8 Old 01-30-2020, 10:48 AM
Senior Member
 
Imageek2's Avatar
 
Join Date: Aug 2003
Location: Riverside, CA
Posts: 496
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 52 Post(s)
Liked: 47
That's interesting! I have the Elite CLR UST 100" and my whites are white. It has been a while since I set up mine so I don't remember what settings I might have played with, however every time I have gone to a different screen I do have to play with the color settings.

I understand your reluctance to play with the settings. I recommend before you start, take a photo of every settings screen in the projector. That way it will be easy to reference if you want to set it back to before you started.

When the moon is in the Seventh House
And Jupiter aligns with Mars
Then peace will guide the planets
And love will steer the stars.
Imageek2 is offline  
post #7 of 8 Old 02-05-2020, 09:19 AM - Thread Starter
Newbie
 
Join Date: Jan 2020
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 0
Quote:
Originally Posted by bdht View Post
Try going to Image Settings > Color Settings > RGB Gain/Bias, and reducing the blue gain. Those screens often have a blue push.
Hi again,

So I did this. Turns out it's the red bias that is affecting the image much more than the Blue one. I was able to achieve the 'white' that whites should look like.

However, since it's affecting the image globally, now the red's are off colour overall. How do I go about correcting this?

Thank you
Rayyan S is offline  
post #8 of 8 Old 02-05-2020, 10:20 AM
Advanced Member
 
bdht's Avatar
 
Join Date: Aug 2016
Posts: 857
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 416 Post(s)
Liked: 176
Do you have a white screen sample or a piece of white paper for reference? If white looks white, how does red look off? like hue looks incorrect? The CMS is in the color settings with rgb gain/bias, you could try adjusting red hue...

Is brilliant color on? whats the color temperature set to?

Also, the difference with the parallax should be visible in the pixel structure, the other materials have a grainy looky to them and the parallax should be very clean and resolved.
bdht is online now  
Sponsored Links
Advertisement
 
Reply Screens

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off