Jump to content



Photo
- - - - -

DLP and rainbow...i can't see it?


  • You cannot start a new topic
  • Please log in to reply
18 replies to this topic

#1 of 19 Dan Belina

Dan Belina

    Advanced Member

  • PipPipPip
  • 41 posts
  • Join Date: Jun 13 2002

Posted August 12 2004 - 10:59 AM

Before I actually saw a DLP screen, I read about horror stories of a rainbow effect.

Went to check some out today, and out of about the 6 or 7 different ones I saw, I couldn't see any "rainbow".

Is it just me, or was I not looking correctly? I tried looking back and forth rapidly, or up and down.

#2 of 19 ChrisWiggles

ChrisWiggles

    Advanced Member

  • PipPipPip
  • 4,791 posts
  • Join Date: Aug 19 2002

Posted August 12 2004 - 11:01 AM

What kind of setup environment was it. Not everyone can see them.

#3 of 19 Dan Belina

Dan Belina

    Advanced Member

  • PipPipPip
  • 41 posts
  • Join Date: Jun 13 2002

Posted August 12 2004 - 11:09 AM

The in-store displays. Looked at several different models and sizes, even the same version in different stores

#4 of 19 Max Leung

Max Leung

    Advanced Member

  • PipPipPip
  • 4,612 posts
  • Join Date: Sep 06 2000

Posted August 12 2004 - 11:14 AM

Are these RPTVs you are talking about? What store did you go to? Was it a Best Buy or something similar, where all the lights in the store are on?

If so, that's not enough to go on...you have to watch them in a dark (light controlled) room.
Mahatma Gandhi, as you know, walked barefoot most of the time, which produced an impressive set of calluses on his feet. He also ate very little, which made him rather frail and with his odd diet, he suffered from bad breath. This made him...a super-callused fragile mystic hexed by halitosis.

Gamesh....

#5 of 19 ChrisWiggles

ChrisWiggles

    Advanced Member

  • PipPipPip
  • 4,791 posts
  • Join Date: Aug 19 2002

Posted August 12 2004 - 11:14 AM

But I mean what kind of store? I'm envisioning a large chain store with everything out on the floor in a brightly lit environment, which will greatly diminish rainbow visibility. A proper setup, in a dark room will reveal rainbows much easier.

#6 of 19 micah bjj

micah bjj

    Advanced Member

  • PipPipPip
  • 60 posts
  • Join Date: Jul 13 2004

Posted August 12 2004 - 11:16 AM

Dan- I like you have never seen them. I try and look for them on my 4805 projecting a 106" image in a dark room and have had no luck...which is a good thing I guess!!!

#7 of 19 Dan Belina

Dan Belina

    Advanced Member

  • PipPipPip
  • 41 posts
  • Join Date: Jun 13 2002

Posted August 12 2004 - 11:24 AM

Chris, yes, they were all on showroom floors (BB, CC, and Sears). Well lit areas

#8 of 19 ChrisWiggles

ChrisWiggles

    Advanced Member

  • PipPipPip
  • 4,791 posts
  • Join Date: Aug 19 2002

Posted August 12 2004 - 11:28 AM

View in a dark environment, and see whether they are visible or bothersome to you.

#9 of 19 Chris Stock

Chris Stock

    Member

  • PipPip
  • 22 posts
  • Join Date: Jul 03 2004

Posted August 12 2004 - 11:49 AM

I've got a SP5700, and I never see the rainbows. My wife does occasionally. The best example which gets her every time is in TLOR ~ Fellowship, when they are on the mountain side and its snowing. Bright scenes are supposed to do that - if your prone.

#10 of 19 Scott L

Scott L

    Advanced Member

  • PipPipPip
  • 4,466 posts
  • Join Date: Feb 29 2000

Posted August 12 2004 - 01:19 PM

I see it on my 4805 when I have my computer's display on it. It has to be a white backgorund with black text, I can see rainbow shimmers on the edges of the text, just faintly though from my distance. I am still wondering what all the hub-bub is or why I can't see 'em during movies!

#11 of 19 SteveCoug

SteveCoug

    Advanced Member

  • PipPipPip
  • 40 posts
  • Join Date: Jul 16 2004

Posted August 12 2004 - 04:34 PM

I have a 4805 and I see flashes of rainbows occassionally, typically when there is a scene rapidly moving from a white area to a very dark area, or vice versa.

However, this is a very small deal, as you can tell, lots of people don't even notice it.

I am SUPER picky ... I'm always staring at the screen trying to see the pixels when I should just sit back and enjoy the damn movie! Posted Image

#12 of 19 Stephen Dodds

Stephen Dodds

    Advanced Member

  • PipPipPip
  • 356 posts
  • Join Date: Aug 29 1998

Posted August 12 2004 - 04:42 PM

I read somewhere that less than 10% of people can see or are bothered by rainbows. Chances are you are not. I can see them if I look, but they don't worry me and I can't really see the point of searching for them.

Steve

#13 of 19 NickSo

NickSo

    Advanced Member

  • PipPipPip
  • 4,274 posts
  • Join Date: Jul 02 2000

Posted August 12 2004 - 05:38 PM

Yeah, the rainbow "horror stories" are overstaed and exaggerated.

Many instances people who saw rainbows at first report they see less, or even see none after watching for a while, 'getting used' to the picture


#14 of 19 Benson R

Benson R

    Advanced Member

  • PipPipPip
  • 741 posts
  • Join Date: Mar 24 2000

Posted August 13 2004 - 12:50 AM

Also, isnt the effect less with the rptv sets versus fp?

Also I think the effect goes away over time, and using proper calibration.

The first movie I watched had rainbows all over them, and for the next week I would see them.

After a couple weeks I hardly ever noticed them. Only black and white movies seem to really bring them out, and even then it is still easy to watch and not headache inducing.

I truly believe most people who returned their x1s or other dlp projectors, probably would have had the effect diminish for them if they had stuck with it.

On a side note I can still bring them out if I crank up the contrast or if I make the image size too big for my viewing distance.
XBL Gamertag: PVT Hicks

#15 of 19 Jack Gilvey

Jack Gilvey

    Advanced Member

  • PipPipPip
  • 4,952 posts
  • Join Date: Mar 13 1999

Posted August 13 2004 - 02:29 AM

Quote:
Went to check some out today, and out of about the 6 or 7 different ones I saw, I couldn't see any "rainbow".


It sounds like you're not trying hard enough. The DLP "rainbows" bothered me less than the washout, motion artifacts and smearing of other types. Ya' picks yer poison.
SVS Customer Service
http://www.svsound.com
sales@svsound.com
techsupport@svsound.com

#16 of 19 ChrisWiggles

ChrisWiggles

    Advanced Member

  • PipPipPip
  • 4,791 posts
  • Join Date: Aug 19 2002

Posted August 13 2004 - 04:15 AM

Quote:
Also, isnt the effect less with the rptv sets versus fp?

Not technically speaking, if only because it's a smaller screen, you may be viewing at a smaller viewing angle, and thus moving your eyes around less, hence less rainbow visibility. Also, many RPTV users are viewing in lit environments, rather than the dark environments needed for FP, which will bring them out more. But there is no technical difference, though colorwheel speeds will vary between models, etc.

#17 of 19 Dan Belina

Dan Belina

    Advanced Member

  • PipPipPip
  • 41 posts
  • Join Date: Jun 13 2002

Posted August 13 2004 - 05:20 AM

Quote:
It sounds like you're not trying hard enough. The DLP "rainbows" bothered me less than the washout, motion artifacts and smearing of other types. Ya' picks yer poison.


Explain to me how one tries "hard enough" to see them...I looked at these DLP's with the express purpose of trying to see this rainbow horror story I keep reading about.

Only thing I can imagine, is that perhaps I'm not doing the right sequence of actions...of course these were all on the well-lit showroom floor.

I've tried looking rapidly back and forth across the screen, as well as up and down, and in circles. Hell, i've even shook my head back and forth while doing this (must have looked like an idiot, but oh well).

#18 of 19 Jack Gilvey

Jack Gilvey

    Advanced Member

  • PipPipPip
  • 4,952 posts
  • Join Date: Mar 13 1999

Posted August 13 2004 - 05:27 AM

Quote:
Explain to me how one tries "hard enough" to see them...I looked at these DLP's with the express purpose of trying to see this rainbow horror story I keep reading about.

Tounge-in-cheek, Dan. Posted Image From the same horror stories you've read, I'd expect to find a pile of quivering, waxen bodies in front of the DLP sets in Best Buy. I found that I can spot them if I shake my head as if in the throws of a Grand Mal seizure. Try it, then you too can post "AH-HAH!" that you saw them and warn the unsuspecting...

Seriously, even if you are susceptible, it's tough to judge on a selling floor.
SVS Customer Service
http://www.svsound.com
sales@svsound.com
techsupport@svsound.com

#19 of 19 ChrisWiggles

ChrisWiggles

    Advanced Member

  • PipPipPip
  • 4,791 posts
  • Join Date: Aug 19 2002

Posted August 13 2004 - 05:27 AM

Quote:
Explain to me how one tries "hard enough" to see them

You go to a proper environment. A well-lit floor in a chain store is not a proper environment for viewing ANY video, let alone hunting for artifacts such as rainbows. The bright lights will reduce visibility significantly. Room color will also affect it. Regardless, it varies from person to person, view in a proper demo room with the lights off to match your viewing conditions at home (which hopefully are a darkend room) and see if in normal viewing, they bother you. You may not notice at all. If you want to dart your eyes around, you should be able to see them, but people don't shake their heads around and glace around really fast back and forth usually, during normal viewing.


Back to Display Devices (TVs/Projectors/Screens)


0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users


Forum Nav Content I Follow