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    Does LED displays get dimmer over time?

    Discussion in 'Apple and Mac OS X' started by chyidean, Dec 19, 2008.

  1. chyidean

    chyidean Notebook Evangelist

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    I know for a fact that CCFL displays get dimmer over time, but does the LED display used in the Macbook do so as well? I like putting it on full brightness, but I'm totally OK with it if I have to dim it down to maximize its life.

    Thanks
     
  2. ronnieb

    ronnieb Representing the Canucks

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    Nope. Unline CCFL displays that get dimmer over the years, they always stay bright.
     
  3. Sam

    Sam Notebook Virtuoso

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    No, they don't! Although I will say that CCFL displays don't dim a ton over time, at least not enough that you would open it and go "Wow, it just got dimmer from yesterday".
     
  4. passive101

    passive101 Notebook Deity

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    Yes, but you'd have to have it on a very long time.

    LED's do burn out, though not in the same way light bulbs do. The heat
    produced gradually changes the properties of the semiconducting material.
    This reduces the light output. Many commonly available white-light LED's
    go dim in just a few months of continuous use. Low-power LED's, and some
    high-power LED's with carefully engineered paths by which heat can be
    extracted from the semiconductor material, last much longer.

    If you are interested in LEDs there are some great sites out there such as www.candlepowerforums.com

    http://electronics.howstuffworks.com/led.htm
    http://en.wikipedia.org/wiki/Light-emitting_diode
     
  5. cdnalsi

    cdnalsi Food for the funky people

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    Do the colors fade away with time?
     
  6. passive101

    passive101 Notebook Deity

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    I am not sure what style or even generation Apple is using in their new displays.

    The LED's are only a light behind the LCD monitor. So the colors are mainly from the LCD while the LED's I'm guessing are only for backlight.

    You will most likely never be able to tell a difference and they will not dim nearly as fast as the older cathode type generation of lighting in LCD monitors.

    The LED monitors are brighter, more durable, and last longer then the old style.
     
  7. WilliamG

    WilliamG Notebook Deity

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    Yes, LEDs dim over time, but take much longer. Longer that you'd probably use the screen for. The nice thing is that they're almost 100% brightness the second you turn the screen on. My CCFL screens take some minutes to achieve the brightness you've selected.