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N900 is not recognizable on any of my devices (windows 10,7, xp) What can I do? (1)
to Nokia N900 by nieldk - 4 days, 1 hr ago - more...
| The Following 2 Users Say Thank You to Dared For This Useful Post: | ||
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2011-11-27
, 18:33
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Moderator |
Posts: 5,320 |
Thanked: 4,464 times |
Joined on Oct 2009
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#172
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This doesn't explain all the issues mentioned in the thread.
If someone else can do the summary of the entire thread before me, please do.
Otherwise I may do so in the next week or so...
I have PM'd konttori again, I don't know his twitter so haven't tried that.
I might try his blog post....
If someone else can do the summary of the entire thread before me, please do.
Otherwise I may do so in the next week or so...
I have PM'd konttori again, I don't know his twitter so haven't tried that.
I might try his blog post....
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2011-11-27
, 18:53
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Posts: 28 |
Thanked: 26 times |
Joined on Feb 2011
@ Mauritius
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#173
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Originally Posted by Dared
So we can conclude that the "mura" thing are these lines that appear due to non-uniform brightness:
Okay guys, sorry for all the posts but i've finally managed to nail it. What everyone is experiencing with the blotches/lines/spots is an effect of AMOLED displays... the imperfections are called 'mura'
I found a website that produces some sort of special layer that prevents mura.... they give a brief description of (their) OLEDs
1) An OLED (organic light-emitting diode) layer that emits light.
2) A backplane, made of TFT (thin-film transistor) circuits that provide current to the OLEDs, thereby controlling their brightness.
3)Polysilicon backplanes don’t provide uniform current because of manufacturing non-uniformities. Without IGNIS technology, the TFT circuits will provide different current to the OLEDs, which results in lines, spots, and cloudy areas known as “mura”.
4) IGNIS AdMo-p™ technology uses a patented TFT pixel circuit and driving scheme to compensate for the non-uniform backplane. So the TFT circuits always provide uniform current to the OLEDs, even though the TFTs themselves aren’t uniform. This means the AMOLED display will always show smooth, mura-free images.
http://www.ignisinnovation.com/techn...o-p-technology
So fear not, your phone isn't faulty!!!! It's just a matter of getting a display that has less imperfections than others
But that still doesn't explain the black spots, which has nothing to do with the brightness because the pixels are switched off, i.e. no current.
| The Following User Says Thank You to cm6 For This Useful Post: | ||
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2011-11-27
, 19:08
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Posts: 4 |
Thanked: 2 times |
Joined on Oct 2011
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#174
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I got an opportunity to check my friends N9 and it had these purple lines, as my N9 did too.
I sent the N9 for maintenance, but I'm most certain that every N9 has this issue. It's really hard to notice in store, as they tend to have strong direct lights above the phones. I checked the only N9 in store and it had this issue too.
Now I'm waiting for the opinion from Nokia and will return the phone if it's beyond repairing...
I sent the N9 for maintenance, but I'm most certain that every N9 has this issue. It's really hard to notice in store, as they tend to have strong direct lights above the phones. I checked the only N9 in store and it had this issue too.
Now I'm waiting for the opinion from Nokia and will return the phone if it's beyond repairing...
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2011-11-27
, 19:27
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Posts: 104 |
Thanked: 74 times |
Joined on Nov 2011
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#175
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Originally Posted by cm6
So we can conclude that the "mura" thing are these lines that appear due to non-uniform brightness:
But that still doesn't explain the black spots, which has nothing to do with the brightness because the pixels are switched off, i.e. no current.
I quote from the aforementioned site: "Polysilicon backplanes don’t provide uniform current because of manufacturing non-uniformities. Without IGNIS technology, the TFT circuits will provide different current to the OLEDs, which results in lines, spots, and cloudy areas known as “mura”."
Those black spots are mura and lines are mura, too. Mura is a term that describes all those imperfections.
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2011-11-28
, 01:15
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Posts: 22 |
Thanked: 2 times |
Joined on Aug 2010
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#176
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Looks like droid razr has the same issue, There is whole thread at motorolla forum discussing this issue. If you go to page 3 you will see that some display's has few of these black spots where as on others it is quite noticeable.
https://supportforums.motorola.com/t...art=0&tstart=0
https://supportforums.motorola.com/t...art=0&tstart=0
| The Following 2 Users Say Thank You to montamer For This Useful Post: | ||
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2011-11-30
, 13:28
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Posts: 7 |
Thanked: 3 times |
Joined on Oct 2011
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#177
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I thought I would post an update on my situation. I spoke with the manager of the store where I bought my N9 from and apparently the official position of Nokia, and of the store I bought the phone from, is that the purple/green lines are not a defect but rather of a feature of the display used in the phone.
I also spoke with the Finnish consumer ombudsman who said that apparently my only option in order to have chance at getting a refund or some of my money back is to make an official complaint to the Finnish Consumer Disputes Board.
I'll call the store back tomorrow and try to argue my case again and bring up the issue with the color depth of the display.
I also spoke with the Finnish consumer ombudsman who said that apparently my only option in order to have chance at getting a refund or some of my money back is to make an official complaint to the Finnish Consumer Disputes Board.
I'll call the store back tomorrow and try to argue my case again and bring up the issue with the color depth of the display.
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2011-11-30
, 13:38
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Posts: 3,790 |
Thanked: 5,718 times |
Joined on Mar 2006
@ Vienna, Austria
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#178
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Originally Posted by Teemu R
a feature? how?
... the purple/green lines are not a defect but rather of a feature of the display used in the phone
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2011-11-30
, 13:47
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Posts: 3,790 |
Thanked: 5,718 times |
Joined on Mar 2006
@ Vienna, Austria
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#179
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Originally Posted by Dared
I don't think you have.
Okay guys, sorry for all the posts but i've finally managed to nail it.
Originally Posted by Dared
This would mean that those lines or spots would always be at the same position on the display, right? Thats not the case. They move across the screen, depending on where you scroll the (dark) content to.
3)Polysilicon backplanes don’t provide uniform current because of manufacturing non-uniformities. Without IGNIS technology, the TFT circuits will provide different current to the OLEDs, which results in lines, spots, and cloudy areas known as “mura”.
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2011-11-30
, 14:10
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Posts: 7 |
Thanked: 3 times |
Joined on Oct 2011
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#180
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Originally Posted by benny1967
I wonder about that too. I guess it's the old software defense "It's not a bug it's a feature!" applied to hardware.
a feature? how?
Apparently this should be accepted by us, the consumers, because the same "features"/faults can be found in other phones as well, at least that was the explanation from Nokia relayed to me by the store manager.My previous phone had a pentile matrix AMOLED display and it didn't have such "features". The sad fact is that if I take it to the Consumer Disputes Board their decision could take almost a year and it's not legally binding since it is a mere recommendation about how the dispute should be solved. It is a shame that Finland doesn't have a small claims court system like U.S. does.
I found a website that produces some sort of special layer that prevents mura.... they give a brief description of (their) OLEDs
1) An OLED (organic light-emitting diode) layer that emits light.
2) A backplane, made of TFT (thin-film transistor) circuits that provide current to the OLEDs, thereby controlling their brightness.
3)Polysilicon backplanes don’t provide uniform current because of manufacturing non-uniformities. Without IGNIS technology, the TFT circuits will provide different current to the OLEDs, which results in lines, spots, and cloudy areas known as “mura”.
4) IGNIS AdMo-p™ technology uses a patented TFT pixel circuit and driving scheme to compensate for the non-uniform backplane. So the TFT circuits always provide uniform current to the OLEDs, even though the TFTs themselves aren’t uniform. This means the AMOLED display will always show smooth, mura-free images.
http://www.ignisinnovation.com/techn...o-p-technology
So fear not, your phone isn't faulty!!!! It's just a matter of getting a display that has less imperfections than others