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Worth switch off OLED display on MP3 players?

Discussion in 'Electronic Components' started by Jim, Jun 20, 2006.

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  1. Jim

    Jim Guest

    I have an MP3 player powered from an AAA cell and with an OLED display.

    There is a setting which lets me dim the display after a selectable
    delay (up to 15 seconds).

    I believe the power consumption of OLED is at least as low as LCD. So
    it seems to me that if I leave the display on permanently then I would
    use negligible extra power from the battery. Is this correct?

    Is there another reason to want to dim the display?

    Maybe an image displayed for a long time would burn itself into the
    display as a ghost image. Would this happen to a noticeable extent?

    So overall, is it alright to set my MP3's OLED display to ALWAYS ON?
     
  2. Pooh Bear

    Pooh Bear Guest

    It's up to you but OLEDs use *much* more power than LCDs.

    Graham
     
  3. Dave Platt

    Dave Platt Guest

    I believe the power consumption of OLED is at least as low as LCD. So
    Nope. OLEDs do use more power than a reflective LCD. They're
    probably more fairly compared to a transmissive LCD with an active
    backlight. Since AAA cells are pretty wimpy, you'll probably extend
    your MP3 player's run time significantly by dimming the display.
    The hardware engineers I work with tell me that OLEDs do have a
    burn-in problem, if they're used steadily and if the average
    brightnesses of the individual pixels is not kept equal over the long
    term. So, yes, you may reduce burn-in/ghosting problems on your
    display by dimming it whenever feasible.
     
  4. Jim

    Jim Guest

    I went and took another look and saw that passive OLEDs (which I
    portbably have got in my MP3 player) take more power than active
    OLEDs.

    Also seems that some pople compare OLED with LCD + backlight
    (backlight is about half the total power used)
    http://www.wave-report.com/tutorials/oled.htm

    This page ignore backlighting "OLEDs do not require backlighting,
    they consume much less power than LCDs. Most of the power in an LCD
    is consumed by the backlight."
    <http://www.electronicproducts.com/ShowPage.asp?
    FileName=onestopdisplays.jun2006.html>

    Am not too sure what the following article concludes about power but
    it seems very relevant.
    <http://powerelectronics.com/power_management/led_drivers/power_power
    ing_passive_oled/>
     
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