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03-19-2011

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Faint Ghosting on X220 IPS screen

2011-05-15, 11:46 AM

ADMIN EDIT:

 

There are two items being discussed in this thread:

 

1) A backlight bleed issue as described by SR45 - we are investigating this, but have seen only a couple users noting this so far.

 

2) "Ghosting" or persistence of  an after-image phenomena after a static image is maintained on the display for 15 or more.   This comprises the bulk of the discussion on this thread.

 

Not all customers have observed this, nor view it as an "issue".  See related thread with counter point.

 

-----------------------------------------------------------------------------------------------------------------------------------------------

 

I've already posted on the notebookreview forum and thought I would also leave a message here as well to cover all forums to get some more feed back.

 

I have tested this out a few times now, and I get a faint burn in (ghosting) when using a dark background and even  a light blue backgrounds when rebooting the system immediately after downloading and installing some software.  When this was first noticed, I just booted up to IE 9 and the google page with my favorite sites on the extreme left side for about a minute, than I rebooted the system.  During the boot up, I could see the faint outline of the task bar at the bottom, the favorites vertical line that seperates the favorites from the main google page. 

 

One or more members with the X220 on the notebookreview forum have noticed the same thing, and wonder if anyone else has seen this as well.  Trying to figure out if this is wide spreed or just a few bad panels.

 

Thank you

 

One picture of the vertical line is posted on the link below.

 

http://forum.notebookreview.com/lenovo-ibm/578520-faint-ghosting-finally-noticed.html

ThinkPad X220 i7 | 8 Gb ram | 320 Gb Hdd 7200 rpm | 6 Cell
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21 Posts

03-19-2011

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Re: Faint Ghosting on X220 IPS screen

2011-05-15, 12:14 PM

 

 

Here is a better picture of what I'm seeing....

 

1.  Two white arrows show the faint ghosting

 

2.  Red arrows show light bleed

 

[IMG]http://i.imgur.com/wLLD6.jpg[/IMG]

ThinkPad X220 i7 | 8 Gb ram | 320 Gb Hdd 7200 rpm | 6 Cell
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05-15-2011

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Re: Faint Ghosting on X220 IPS screen

2011-05-15, 19:41 PM

Yep, as much as I love my new X220, this is a definite issue with the screen.  Is there any idea on A) whether or not this could degrade the quality of the panel moving forward and B) if anything can be done to correct it?

Owner/Technology Specialist
Triple-S Computers - http://www.TripleSComputers.com
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05-12-2011

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Re: Faint Ghosting on X220 IPS screen

2011-05-15, 20:35 PM

No, the effect is not burn-in, but is an artifact of what is known as "Response time compensation" RTC, or otherwise known as LCD "Overdrive."  The effect should be called "Ghosting", not Burn in.

 

It is usally done with TN and VA screens, but I guess they used a similar technique on these screens, in order to increase the response times.

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05-21-2011

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Re: Faint Ghosting on X220 IPS screen

2011-05-21, 23:36 PM
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Re: Faint Ghosting on X220 IPS screen

2011-05-22, 10:27 AM

Hi richmanx220t and welcome to the forum!


Your post turned out blank because:-


Users of Internet Explorer 9 are experiencing problems creating posts and private messages. The content is lost and appears blank when posted. While this is being investigated and fixed, please use Quick Reply, Internet Explorer 9's Compatibility View, or an alternate browser to post. Thank you.

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Maliha (I don't work for lenovo)
ThinkPads:- T400[Win 7], T60[Win 7], IBM 240[Win XP]

IdeaPad: U350

Apple:- Macbook Air [Snow Leopard]
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05-21-2011

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Re: Faint Ghosting on X220 IPS screen

2011-05-22, 13:57 PM
Thanks (x2) Maliha,
I was looking for an official statement from Lenovo about both issues I've seen 1. the feint ghosting and 2. the backlight bleed.
Neither is really inhibiting the use of my x220t (which I love btw) but I want to know if these issues represent actual problems with the screen or are they more along the lines of typical behavior for the class/build IPS panels they used.
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05-25-2011

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Re: Faint Ghosting on X220 IPS screen

2011-05-25, 23:31 PM

Just got my X220 yesterday and I already noticed this issue.  This is very apparent and a real problem.  I also have the aforementioned backlight bleed in the attached pictures, but the LCD ghosting is a bigger concern, as I'm worried this will get worse with age.  Can someone from Lenovo comment on this?

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Re: Faint Ghosting on X220 IPS screen

2011-05-26, 0:10 AM

Modoc - welcome to the forum!

 

i believe SR45 stated somewhere on the notebookreview.com forum that the ghosting artifact is tied to the intel control panel's power-saving feature and isn't a flaw in the display itself.   my X220 doesn't ghost and i have that feature turned off.

 

perhaps SR45 will update this thread with his findings.   it would certainly be appreciated.

ThinkStation P700      ThinkPad X1C7

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05-25-2011

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Re: Faint Ghosting on X220 IPS screen

2011-05-26, 15:57 PM

OK, i went into the Intel Control Panel, the "power saving feature" is only an option on battery, and I haven't had the machine unplugged at all yet, so it's not that.  I did change the default power plan in the Intel Control Panel from Balanced to Maximum Performance, and I also noticed that the refresh rate on the panel was set to 50Hz rather than 60, so I bumped it up to 60.

 

I'll update in a few hours on whether or not this has any effect on the image burn-in / ghosting issue.

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