MBP Unibody LED - screen burn-in/ghost effects still possible?

Discussion in 'MacBook Pro' started by lars666, Aug 17, 2009.

  1. lars666 macrumors 6502a

    Joined:
    Jul 13, 2008
    #1
    Hi everybody,

    I own a MacBook Pro hooked up to an ACD 24". As I sometimes watch eyeTV on fullscreen on the Cinema Display while still having the MBP display open, both screens won't turn out automatically. Do I have to worry when I for example leave the place for a few hours while this setting is still running that on the MBP screen (where the image stays the same) there can be burn-in or "ghost" effects? Or is this not possible anymore with LED technology? It's not very difficult to prevent this, but I'd just like to know ... If anybody has a definite answer, this would be appreciated. Thanks!
     
  2. Bill Gates macrumors 68020

    Bill Gates

    Joined:
    Jun 21, 2006
    Location:
    127.0.0.1
    #2
    I don't have a definitive answer for you, but as far as I know, LED-backlighting does not affect an LCD's susceptibility to image-persistence, since it is caused by the LCD crystals themselves, as opposed to the backlighting. Click here for an informative article on the subject.
     
  3. JGruber macrumors 6502

    Joined:
    Feb 13, 2006
    #3
    Why don't you use the MBP in 'Clamshell' mode? I can see why you wouldn't if you need the 2nd display.
     
  4. lars666 thread starter macrumors 6502a

    Joined:
    Jul 13, 2008
    #4
    @JGruber: Sometimes, I use the ACD as a "TV" and the MBP display to work on it. Anyway, thanks both of you for the answers and the link. I probably don't have to be afraid of burn-in/ghost effects when "only" having the same static picture on for a few hours, but I'll keep an eye on it nevertheless.
     
  5. mikes70mustang macrumors 68000

    mikes70mustang

    Joined:
    Nov 14, 2008
    Location:
    US
    #5
    Im thinking that the only way you will get burn in on any modern screen is, if the screen is not in use and left on w/ the same picture for weeks on end. The ones at my job stay on 24/7 and it hasnt happened to any of those yet.
     
  6. lars666 thread starter macrumors 6502a

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    Jul 13, 2008
    #6
    This sounds good, as in my case, the same picture would only stay a few hours max. Thanks for the answer!
     
  7. xxBURT0Nxx macrumors 68020

    xxBURT0Nxx

    Joined:
    Jul 9, 2009
    #7
    lcds and computer monitors are not really likely to have burn in. Think about how often the same image (dock, taskbar, icons, background) are all displayed on the screen for. Burn in was only really a problem with plasma tvs, and has mostly been eliminated with todays plasmas.

    I wouldn't worry about it at all. If they were likely to burn in, it would burn in whether or not you had the external display, because it would always be displaying the menu bar and dock.
     
  8. lars666 thread starter macrumors 6502a

    Joined:
    Jul 13, 2008
    #8
    Hi xxBURTONxx,

    I guess your logic is right - although I've heard of "ghost effect" cases on the dock and task bar position (and even experienced it on my old LCD iMac with my eyeTV remote - needed days till it faded away), I never had any of these effects on my LED ACD and MacBookPro where the dock etc. is shown for many hours without any changing. Therefore, it really shouldn't be a problem. Thanks for your answer!
     
  9. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #9
    technically speaking no, LCDs do not suffer form burn in.

    CRTs had a burn in affect when a single image was displayed on the glass for an extended time, causing the phosphors to lose their luminance

    While possible, its highly unlikely that LCDs can suffer from image persistence, that is the LCD elements fail to go back to their relaxed state. It does happen but not to the extent of CRTs. What's more likely is that a transient image persistence, which can be undone by displaying a bright image.

    Plasma display panels were more prone to image burn-in but manufacturers have worked to mitigate this issue, at least HDTV manufacturer. Of course I wonder how popular plasma TVs are now, since LCD HDTVs are so cheap.
     

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