Late 2015 Retina iMac Light Bleed Thread

[makrom]

I'm not sure why you participate to this thread. If you're happy with your screen, I'm happy for you.
And I'm happy for Apple that people like you exist. They can make great margin, selling average product, because people don't expect it to be perfect anyway.
And you're right. I don't know why I would watch a movie on my iMac... I'm completely stupid (in addition to "picky").
BTW, it's funny cause I saw you reacting to a post related to fan noise.. Don't be picky man.. it's just noise.

I think you guys should appreciate that there's at least the possibility that there's quite the range of how affected these displays are by backlight bleeding.
While it's true that absoutely every commonly lit LCD panel has some backlight bleeding, it gan go from almost impossible to notice to annoying as hell.
While my panel has visible backlight on a black screen with high brightness in a dark room, I consider it to be comparatively minor to most other LCDs I know. If someone would think that this is a panel with bad backlight bleeding, I would perceive it as being overly picky.
But since we aren't talking about my panel but someone elses and I don't know how bad the situation actually is for them, I can't really judge them and neither should anyone else.

I don't see how this discussion will yield anything useful as long as we don't have any somewhat objective measurements. Name calling won't get us anywhere.

 

[Laai]

I'm not sure why you participate to this thread. If you're happy with your screen, I'm happy for you.
And I'm happy for Apple that people like you exist. They can make great margin, selling average product, because people don't expect it to be perfect anyway.
And you're right. I don't know why I would watch a movie on my iMac... I'm completely stupid (in addition to "picky").
BTW, it's funny cause I saw you reacting to a post related to fan noise.. Don't be picky man.. it's just noise.

I'm not. I realized that the hearing the fan with the iMac 5K is common and I've accepted it, just as you should accept the light bleed "problem".

Honestly, I see neither a problem with the fan "noise" neither with light "bleed". Thats just my 2 cents.

 

[dsc888]

I just picked up my replacement RiMac last night for one that had too many stuck pixels. The new panel I have now has zero light bleed. My older unit had several spots on the top and but it never bothered me in normal use. I did thorough testing of my 2nd iMac and this one had no dead or bright pixels and no backlight bleeding even in a dark room with brightness set to maximum. I won the panel lottery the 2nd time around. ;-)

 

[squidward]

2 iMacs and both had bad panels. One with stuck pixels and one with bad light bleed. Ended up returning the devices indefinitely. Never had a device that had such bad backlight bleed. It sucked that the first one with stuck pixels had no backlight bleed at all

 

[maflynn]

I'm happy with my iMac and I'm not searching it for problems because when you search for imperfections you will find them. Nothing is perfect, and upon my normal usage patterns I've not found anything worth worrying about.

 

[squidward]

Glad to hear you are happy with your iMac. Wish my experience was the same as yours and the 2013 iMacs I have. Bought 3x 2013 iMacs for business use and none of them had issues with light bleed or stuck pixels. Those iMacs have been champs! had them since release, all of them BTO.

As it turns out, the first Late 2015 has clusters of stuck pixels near the Apple logo upon start up. The pixels would only display a purple/red color. I had it exchanged for another one which had pretty nasty backlight bleed making blacks have yellow tints in those areas. I'm use to backlight bleed but it was such a large bleed on such a big display it was hard to ignore that. I'll stick with the 2013s for a bit longer

 

[killhippie]

Having gone though 3 late 2015 iMac's all have had great screens, then again I also don't go looking for issues. Not even a expensive OLED 4K TV will be perfect, nothing is, they are all mass produced. I have hardly any backlight bleed and since I don't sit in low light with the screen on full brightness I don't see any backlight bleed because that's an unreal test. Dimming is there for a reason.

I really don't get why people sit in the dark with brightness on full then complain they see backlight issues, if I did that to my TV I may see issues but I don't do that. I enjoy it being used as intended and I realise than no matter how much you spend nothing is perfect, and never will be unless you get a machine that's hand built from the ground up with a screen that's picked out from millions that is completely perfect (impossible for LCD) and then believe me it would cost a lot more than 3k

 

[Sowelu]

My new (late 2015) 27" 5K iMac has some light bleed as well (on the lower left hand side). You can only notice it with 100% brightness in a dark lit room (as we all know). Overall the display is more even than any other Mac that I've owned.

However, something else caught my eye... As I was walking passed my iMac (from right to left) while the screen saver was active, I noticed that there are two diagonal light beams (or whatever you want to call it) going from the bottom middle portion of the display to the upper left portion of the display. You can see them slightly while looking at the display head on (in a dark room with a black screen), but it's more noticeable when looking at the display from the right side towards the left.

Head on it's barely noticeable on a totally black screen (the pics exaggerate it). So while it doesn't seem to affect the display during normal use, I was wondering if this was a defect, or if this is typical with IPS displays?

While looking from the left hand side, you can't see the diagonal beams, and the bleed looks inverted. I am assuming that the purple hue is due to the IPS or the coating on the display. The weird dots on the upper left hand side is actually a reflection from a nightlight: