Previous 1 503 504 505 506 507 Next 9,618 Replies Latest reply: Mar 30, 2016 6:30 AM by sawyer_22 Go to original post Branched to a new discussion.
  • Gunnar22 Level 1 Level 1



    I agree. This is getting a bit ridiculous. Let's keep the discussion on topic, please, Jajaba.


    On another note, do we essentially have confirmation that the SJA-2 displays are not IR-prone? If not, is there someone here who has had a defective LG SJA-2 display?

  • Jajaba Level 1 Level 1

    Electromagnetic power consists of a magnetic field and an ELECTRIC  field and the power is measured in Watts either as Watts per sq/meter or MW per sq/centimeter. And you need x Watts to produce x amount of EM energy. The Watt that is used here is the same as the Watt used in any other measurement, and is measurable as heat just like any other Watt.


    I give up in trying to explain the basic physics fact that a Watt is a Watt in any form of measurement.  I return you to the very slow IR issue.

  • sunrat39 Level 1 Level 1

    I have the samsung panel and I have noticed a slight faded (grey) line on the right side of my screen.  It is about a third from the right bezel.  Here is a pic (It looks like a vertical line above the "System Preference" icon which is next to the spotify icon...


    It is hard to see from this pic but you almost have to look at it from the left side...



  • Chuck Gould Level 1 Level 1

    All electromagnetic radiation - RF, thermal, or optical - is created by changing the energy of electrons or other charged particles. The motion of electrons [through the display's components] doesn't cause all of its energy to be emitted as thermal EM radiation - it's this fact that goes back to the concept posted in my original reply. There is not 115W of thermal radiation coming out of your display. (I believe this is what s57 and tksdev also stated.)



    (Sorry guys, I know this seems off-topic (ok, maybe more than seems...), but it's important to get right, IMO. That said, my original question had to do with exterme temperatures and possible effects on the displays (IR) - so the topic of heat is relevant. But, I never anticipated the the discussion that followed. Promise this will be my last word on what's watt. )

  • Chuck Gould Level 1 Level 1

    I can kind of see a vertical bar of darker gray, but it's not very well defined in the image. Also, it looks like the background is a gradient (lighter on left, unless that's a reflection.


    Can you try again, but take more care in focusing and try for a more straight-on shot? Turn down the room lights to reduce glare/reflections. If you can, set the color balance on the camera to daylight (though, since it's grey, a color cast on the camera end really won't matter).

  • MKlys Level 1 Level 1

    Can IR be subject to room temperature. I saw it few days ago when staying at my brother cottage which was really warm. I'm testing my screen at my home, normal temperature, and I don't see it. There is no other difference to conditions. Wired.

  • Chuck Gould Level 1 Level 1

    That's the question I was asking before getting entangled in watts.


    I found some references to how high temperatures could contribute to IR (though it would be temporary), and under even higher temperatures possibly causing permanent susceptibility to IR.


    By high temperature, I would think it would need to be significantly higher than the 113° maximum storage rating. Think along the lines of temps you could get inside a closed vehicle sitting in the sun on a warm day (you'd be surprised how warm it could get to even on a cool day, windows closed.)'

  • MKlys Level 1 Level 1

    My brother must be really lucky - his MBP Retina with LG screen shows no signs of IR at all, it's Mid 2012 model. I had same, now it's Early 2013 with LG and I saw IR already. I'm really worried. I emailed Apple but if I had to take my laptop to Apple Store it would pass their tests for sure. Drives me mad because I have no time for all of this - I would ask for a refund but I've invested a lot of money in the software (FCP X, Motion, Aperture, Logic, Pages, Keynote).

  • pedrofromguimar Level 1 Level 1

    Yes, if you read some pages behind there are some cases. It seems to be the same display.

  • felix53 Level 1 Level 1

    Either i'm an idiot or apple changed something. I run the command and get back nothing. Tried running as sudo as well as just grepping for EDID.


    $ ioreg -lw0 | grep \"EDID\" | sed "/[^<]*</s///" | xxd -p -r | strings -6


    my os version is 10.8.2 and my macbook pro 13" is a late 2012 model.



  • felix53 Level 1 Level 1

    Ok, my answer is that i'm an idiot. It only works on the 15".

  • gam3r Level 1 Level 1

    Hey guys,


    I got LG initially which had horrible retention issues. Later Apple Support replaced the display and I got Samsung which was fine, but it had warm colour tint. After 7 months of usage, since yesterday I started seeing Mura (White Spots) on my screen. Took it in to AppleStore today, they are replacing the display again. I hope I get Samsung again not LG.

  • Will37 Level 1 Level 1

    I have a refurbished 13" rMBP made 3/14/2013 (week 10), but 2012 model (2.5 GHz). From what I have read in this forum, I think it might have a Samsung screen due to the pinkish/purple apple and narrow viewing angle. The screen is perfect except for this narrow field of view. From a normal viewing distance, the display is brightest in the center and darkens noticably toward the edges. A 5-10 degree shift off center in any direction darkens half the screen. Is this normal? I thought the retina display had a 178 degree field of view.

  • sunrat39 Level 1 Level 1

    Straight on shot doesn't really show the line ( I can't seem to get it with my iphone).  I know the line is there because when I swipe back and forth it sits there and it is more apparent.  I have tried the black and white slideshow trick, and I have also tried letting the background stay static white as well.  Those two tests were done on two different nights.  I am about to try the "flurry" screensaver overnight (even though its my current screensaver now).  I got such a good deal on this open box item at best buy and it even has the samsung panel, but that little grey line will bother me. 

  • Jajaba Level 1 Level 1

    Forget the Watts issue.  Your Temp theory, while interesting, is also not really worth pursuing here because there is no way for any of us to actually test, verify or prove that high temps might cause IR on this specific model of LG display.  The fact that all LG's retinas do not have IR means that there must be some variable in the manufacturing process / materials that is causing a percentage of the dispays to develop IR.  The only ones who can figure out the cause are LG, Apple or a third party 'testing' service.  We just don't have enough info on the materials and processes involved to even begin to figure out the variables let alone a solution.  


    I am certain that the 2 MBPr's we are using for in studio batch processing are seeing the maximum tempuratures that the MBPr is capable of producing for at least  2 hours continuously on a daily basis, with ambient temps averaging 80F.   I would guess that 90+% of people reporting IR here are not maxing out their MBPr temps to anywhere near this extent.  So even if high temps may cause the LC medium to 'degrade' over time I don't believe this is the cause of the IR issue with these LG displays.


    As I stated previously we have several high gamut RGB monitors (NEC, Eizo and Dell)  all of which have LG IPS displays.  All our monitors run at a significantly higher tempurature than the retina display.  I have not measured the actual temps but it's obvious by just placing your hand on the displays face after they have been running for several hours.  I just checked the run time on our oldest (5 years)  Eizo 24" RGB and it has 7800 hrs (and the CCFL was replaced ~2 years ago).  This display and all the others (all LG) show absolutely no signs of IR.