RED One EVF Image Burn In

[caseybramall]

Hi all,

I have noticed on one of our RED EVF's that there is a distinct amout of image burn-in on the viewfinder screen when it's shut off.

The "powering down" image is apparent as are some of the bottom menu info, incuding the histogram marker, and some other minor, less noticable items.

Has anyone had this issue? Is there a forum/post about this I may have missed?

Any relevant info on this would be great, please let me know what your experiences are, and if there are remedies, or what can be done to avoid or minimize this effect.

The burn-in doesn't seem to noticeably affect the picture quality in the VF at this time, but it is still a concern, and am worried about it getting worse in the future.

Since the camera generally stay powered up on set all day, I assume this is the cause of the issue, I can't say how many hours in total the EVF has been on, but my guess is probably over 1000 hours or so.

IMO, this amount of time shouldn't lead to this much, or any, burn-in on the screen, so maybe it's a faulty VF, or possibly a design flaw that needs attention, or it's normal and I'm worried about nothing (this would be best )

Again, any info regarding this would be appreciated!


Thanks,

Casey

 

[Eirik Tyrihjel]

Since you see the "Powering down" which only displays shortly before it powers down, is it conceivable that what you have here is not a burn-in, but just LCD pixels that are in their last used state, that you can vaguely see even though they are not backlit?

Would be weird if the "Powering down" message got burned in.

My EVF is out on rental tonight, so I haven´t had the chance to check if mine is like this.

 

[caseybramall]

may be right!

may be right!

That's a great point, possibly a residual effect from the LCD panel, but it is still a concern... as I said there are is still the histogram at the bottom, plus other various, more faint, images. I hope you are right and it is not burn-in, but we will see as this post progresses, thanks for the reply!


P.S. the VF in question has been off for more than 6 hours, and was not powered on for more than approx. 30 mins. at a time, in at least the last week.

 

[caseybramall]

Checked another EVF that has been in repair for over 2 weeks, and there is also burn-in on that one, the histogram, shutter angle #'s, frame guides, and vaious other more faint images also appear in this VF, although the "powering down" image does not show up.. IMO it is a burn-in issue. If there are other opinions or an expalination for this, please let me know...

 

[Sidney L. Plaut]

I had something like that "burn in" - no problem though - do like plasma screen. Somewhere in the menus you can display a "white" screen. Let be on for an hour or so. and you should be all good. - cant remember where in the menus you set it - I think it was instead of "colorbars" you can set it to black or white... hope it helps

 

[Paul Leeming]

Guys, it's not burn-in, it's a side effect of the LCoS technology used in the EVF.

The Red EVF uses a sequential RGB LCoS panel that alternates the R,G,B pixels at high speed to generate its image. This is what leads to what some people refer to as the "rainbow effect" when your eye pans quickly across the image in the viewfinder, because your eye's motion rate exceeds that of the colour pixels changing, so you "catch the rainbow", so to speak.

But that's an aside. The relevant part here is that due to this form of LCoS implementation, the last pixel state is held until the device is powered on again. That's why the most common thing to see is the "Powering Down" text and the various display fields, since these have the most contrast between adjacent pixels at the time.

In other words, this is normal and expected behaviour. Nothing to worry about.

HTH

Paul

 

[caseybramall]

Thanks. That's a great post, I am not so worried anymore... but I will still be keeping an eye on this issue. No pun intended.

 

[Mark Pugh]

the last pixel state is held until the device is powered on again.
Paul

sorry Paul... I've got an image still burned in from a shoot late last year.
Seems the camera was sitting there for a while, left on.

Not an issue though. It's not visible when the EVF is being used.

 

[caseybramall]

Seems Paul is correct about the last image holding in the VF, I have tried a few different screens and just pulled the cable to see what happens... and the last image displayed ghosts.

Mark is also correct as there is definitely permanent burn-in on them as well. frame guides, histo, shutter angle, etc... are all permament.... Interesting issue...

I don't think is it affecting the image when the VF is on, but further tests will bear this out.



Casey