Glo Light flicker?

CatherineStewart · 02-15-2013, 09:11 PM

Has anyone noticed their glo light ever so slightly flicker randomly? Not just during a page turn but afterwards as well. It's subtle but annoying. Turning up the brightness seems to stop the random flickering but I like the light on the lowest setting.

robko · 02-15-2013, 09:29 PM

I have seen that with the light on a really low setting. Not sure whether it's hardware or firmware related. I have the light slightly higher and it doesn't do it. That works for me since I rarely read in complete darkness so I don't need bottom end light level.

CatherineStewart · 02-15-2013, 09:30 PM

I'm hoping it's a firmware issue!

Lily7 · 02-15-2013, 09:36 PM

Well I didn't notice it until I read your post.

However, if mine is doing it, it is very, very slight. So slight, I'm wondering if it's just in my head because I read this thread.

Liesse · 02-16-2013, 03:17 AM

Yes, I have a few times. I read with the light on its lowest setting. I have noticed flicker a couple of times. It is a bit irritating, but I found that if I upped the light level one notch, it went away. I also wondered if it was in my head, but I noticed a difference when it went away. Fingers crossed it has not become a regular problem for me, as I read on my Kobo minutes ago on the lowest light setting with no problem.

lkodk · 02-17-2013, 08:24 AM

Man. I thought it was my eyes playing tricks on me.
I rarely read in complete darkness, but when I do, I have noticed it. I have the light on lowest setting, but fiddling with the light settings, turning it a bit up and back down to lowest, seems to make it go away. Hence the thought of my eyes playing tricks.

arikol · 02-17-2013, 10:02 AM

It is quite possible that it's not really a bug or a flaw. These devices use LED lights for illumination, and dim them by switching them on and off very fast. At the lowest brightness settings it is quite common to get these glimpses of flashing, but it feels like you imagined it. That's because your peripheral vision has a higher sensitivity to flickering than the the focused part of your eyesight.

Try looking directly at the screen at the lowest brightness, and then spending a little time looking past the screen, keeping the screen in your peripheral vision.

Most computer LCD monitors that use LED backlighting also have this issue.

There is, of course, the chance that there is a problem with your device, but I think that this may be more likely.

0x55 · 02-17-2013, 10:17 PM

Quote:

Originally Posted by Liesse

It is a bit irritating, but I found that if I upped the light level one notch, it went away.

Same opinion and same solution here.

As someone who does read in otherwise total darkness, it would be cool if the bottom of the glow range was more stable. But overall, the light is pretty good – better than what I've seen on the competition.

danskmacabre · 02-18-2013, 05:15 AM

Ah it's not my imagination then!
I also have it on the lowest setting and occasionally I notice a very subtle flicker.
It doesn't happen very often tho.
I will turn it up a notch and see how it goes..

CatherineStewart · 02-19-2013, 10:29 AM

Yep. I thought I was imagining it too at first but I made my hubby look and he also saw it. Dang. I always read in total darkness and find the lowest setting still to bright so turning it up sucks. But yes the glo is still the best out there IMO regardless.

goesta · 02-19-2013, 11:47 AM

Yes, I had intermittently noticed that as well, and worried whether it was developing hardware issue, but then it went away again. I might have changed the brightness, not sure. Or maybe my eyes are just more sensitive some times than at others. I have also heard of this being a general issue with LED lighting at low levels. Though that begs the question, since any brightness settings above 70% seem (to me) pointless on the Glo, why not use lower powered LED to begin with (and possibly save battery as well).

02-15-2013, 09:11 PM	#1
CatherineStewart Enthusiast Posts: 41 Karma: 12450 Join Date: Mar 2012 Location: Ontario, Canada Device: Kobo Glo	Light flicker? Has anyone noticed their glo light ever so slightly flicker randomly? Not just during a page turn but afterwards as well. It's subtle but annoying. Turning up the brightness seems to stop the random flickering but I like the light on the lowest setting.

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02-15-2013, 09:29 PM	#2
robko Guru Posts: 871 Karma: 2057460 Join Date: Jul 2010 Device: Kobo	I have seen that with the light on a really low setting. Not sure whether it's hardware or firmware related. I have the light slightly higher and it doesn't do it. That works for me since I rarely read in complete darkness so I don't need bottom end light level.

02-15-2013, 09:30 PM	#3
CatherineStewart Enthusiast Posts: 41 Karma: 12450 Join Date: Mar 2012 Location: Ontario, Canada Device: Kobo Glo	I'm hoping it's a firmware issue!

02-15-2013, 09:36 PM	#4
Lily7 Connoisseur Posts: 52 Karma: 21932 Join Date: Feb 2013 Location: Norman, OK Device: Kobo Glo	Well I didn't notice it until I read your post. However, if mine is doing it, it is very, very slight. So slight, I'm wondering if it's just in my head because I read this thread.

02-16-2013, 03:17 AM	#5
Liesse Connoisseur Posts: 54 Karma: 28116 Join Date: Dec 2010 Device: Kindle3, Kobo Glo	Yes, I have a few times. I read with the light on its lowest setting. I have noticed flicker a couple of times. It is a bit irritating, but I found that if I upped the light level one notch, it went away. I also wondered if it was in my head, but I noticed a difference when it went away. Fingers crossed it has not become a regular problem for me, as I read on my Kobo minutes ago on the lowest light setting with no problem.

02-17-2013, 08:24 AM	#6
lkodk Connoisseur Posts: 55 Karma: 17602 Join Date: May 2009 Location: Copenhagen, Denmark Device: PRS-505 + PRS-600 + PRS-T1 + Kobo Glo	Man. I thought it was my eyes playing tricks on me. I rarely read in complete darkness, but when I do, I have noticed it. I have the light on lowest setting, but fiddling with the light settings, turning it a bit up and back down to lowest, seems to make it go away. Hence the thought of my eyes playing tricks.

02-17-2013, 10:02 AM	#7
arikol Junior Member Posts: 1 Karma: 10 Join Date: Feb 2013 Device: Kobo Glo	It is quite possible that it's not really a bug or a flaw. These devices use LED lights for illumination, and dim them by switching them on and off very fast. At the lowest brightness settings it is quite common to get these glimpses of flashing, but it feels like you imagined it. That's because your peripheral vision has a higher sensitivity to flickering than the the focused part of your eyesight. Try looking directly at the screen at the lowest brightness, and then spending a little time looking past the screen, keeping the screen in your peripheral vision. Most computer LCD monitors that use LED backlighting also have this issue. There is, of course, the chance that there is a problem with your device, but I think that this may be more likely.

02-18-2013, 05:15 AM	#9
danskmacabre Fanatic Posts: 525 Karma: 1340326 Join Date: Jun 2011 Device: Kobo Glo and Touch	Ah it's not my imagination then! I also have it on the lowest setting and occasionally I notice a very subtle flicker. It doesn't happen very often tho. I will turn it up a notch and see how it goes..

02-19-2013, 10:29 AM	#10
CatherineStewart Enthusiast Posts: 41 Karma: 12450 Join Date: Mar 2012 Location: Ontario, Canada Device: Kobo Glo	Yep. I thought I was imagining it too at first but I made my hubby look and he also saw it. Dang. I always read in total darkness and find the lowest setting still to bright so turning it up sucks. But yes the glo is still the best out there IMO regardless.

02-19-2013, 11:47 AM	#11
goesta Member Posts: 18 Karma: 5396 Join Date: Jan 2013 Location: Berlin Device: Kobo Glo	Yes, I had intermittently noticed that as well, and worried whether it was developing hardware issue, but then it went away again. I might have changed the brightness, not sure. Or maybe my eyes are just more sensitive some times than at others. I have also heard of this being a general issue with LED lighting at low levels. Though that begs the question, since any brightness settings above 70% seem (to me) pointless on the Glo, why not use lower powered LED to begin with (and possibly save battery as well).


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