Reduce white point

Discussion in 'iOS 9' started by abrahamr1991, Apr 4, 2016.

  1. abrahamr1991 macrumors newbie

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  2. Sirious macrumors 65816

    Sirious

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    #2
  3. abrahamr1991 thread starter macrumors newbie

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    #3
  4. perfect_ macrumors member

    perfect_

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    #4
    It decreasing brightness. So yeah reduce white point helps save battery.
     
  5. abrahamr1991 thread starter macrumors newbie

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    #5
    A lot is saving and worth?
     
  6. perfect_ macrumors member

    perfect_

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    #6
    Try it yourself.
     
  7. Paddle1, Apr 13, 2016
    Last edited: Apr 13, 2016

    Paddle1 macrumors 68030

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    #7
    I'm pretty sure it has no effect on the battery or backlight. It just changes how the display looks.
     
  8. GreyOS macrumors 68030

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    #8
    Yes, my understanding is it changes the colour not the backlight, and my understanding is only a reduction in the latter would improve battery life.
     
  9. perfect_, Apr 13, 2016
    Last edited: Apr 13, 2016

    perfect_ macrumors member

    perfect_

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    #9
    - Adjust full brightness.
    - Turn On Reduce White Point
    - Turn Off Reduce White Point

    Do this steps over and over again. Until u see the difference. Im pretty sure it has effect on the battery. Because brightness or screen light or pixel white colour or whatever reducing and this means lcd spends a little less energy.
     
  10. GreyOS macrumors 68030

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    #10
    How about go to a white screen and then go to a black screen
    you see the difference?

    well the backlight is still the same strength, using the same power
     
  11. Paddle1 macrumors 68030

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    #11
    What GreyOS said. That toggle doesn't change the brightness it just makes lighter areas appear darker. Just like a black screen, showing a darker image uses the same amount of power on an LCD display. Changing the brightness alone would not reduce the "white point".
     
  12. perfect_ macrumors member

    perfect_

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    #12
    No u are totally wrong. Lcd uses different energy these scenarios. Black screen uses less energy than White screen. And these feature has a 'Reduce White Point' name.
     
  13. Paddle1 macrumors 68030

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    #13
    That's incorrect. LCD displays don't use less power when displaying black, LED displays do.
     
  14. GreyOS macrumors 68030

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    #14
    edit: SORRY quoted the wrong person, wasn't paying attention

    agree with you, perfect_has it wrong
    --- Post Merged, Apr 13, 2016 ---
    Reduce White Point is an accessibility feature and doesn't have anything to do with energy consumption
     
  15. perfect_, Apr 13, 2016
    Last edited: Apr 13, 2016

    perfect_ macrumors member

    perfect_

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    #15
    We are reducing pixels white points. We are doing it pixel level with/or reducing screen brightness too with Reduce White Point. Maybe engineers added, reduce brightness, codes too in this feature like low power mode(it decreasing screen brightness too like reduce white point) If its incorrect then enlight us. I still believe what i see.

    If i hold the 5W light to ur eyes. U should say this.
    - Whats that.
    (Turn on Reduce White Point)

    If i hold the 80W light to ur eyes. U should say this.
    - ~>|>?\•~^*{
    (Turn off Reduce White Point)

    Thats what im talking about and thats what i see. Reduce white point decreasing screen light. And low light means low energy.
     
  16. Paddle1 macrumors 68030

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    #16
    Doing that would darken the whole screen, not just the white parts.

    "The major benefits from OLED type displays comes from the high level of control that can be exerted over each pixel. Pixels can be switched completely off, allowing for deep blacks and a high contrast ratio. Being able to dim and turn off individual pixels also saves on power. The lack of other layers on top of the LEDs means that the maximum amount of light reaches the display surface, resulting in brighter images with better viewing angles."

    From: http://www.androidauthority.com/amoled-vs-lcd-differences-572859/

    You can't dim only the white areas by turning down the brightness. Changing the brightness isn't enough to change the contrast.
     
  17. C DM macrumors Westmere

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  18. abrahamr1991 thread starter macrumors newbie

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    #18
    Then reduce the brightness of the screen or just change the colors?
     
  19. abrahamr1991 thread starter macrumors newbie

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  20. Paddle1, Apr 19, 2016
    Last edited: Apr 19, 2016

    Paddle1 macrumors 68030

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    #20
    It does not appear to be brightness, from the other thread:
    Read the thread here: http://forums.macrumors.com/threads/reduce-white-point.1717661/ if you want more information.
     
  21. abrahamr1991 thread starter macrumors newbie

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    #21
    But if it dims the white parts and a pixel could have a range of 0-230, it would be reducing the brightness, no?
     
  22. GreyOS macrumors 68030

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    #22
    There's a bit of a terminology issue here.

    The Brightness setting on iOS controls the backlight. On a TV you'll often see a different setting for brightness and backlight.

    Reducing white point is reducing brightness (in TV terminology) and doesn't save battery on iPhone screens; only reducing backlight does. And that's controlled by the Brightness setting. Confused? Lol
     
  23. abrahamr1991 thread starter macrumors newbie

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    #23
    But it reduces brughtness, save more batery, no?
     
  24. GreyOS macrumors 68030

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    #24
    No, as many people have stated over and over.

    Let me use purely iOS terminology so as not to confuse matters.

    1. Lowering brightness in iOS saves battery.
    2. Reducing white point does not lower brightness.
    3. Reducing white point changes the colour of pixels.
    4. Changing the colour of pixels does not save battery on iPhone screens.

    Got it?
     
  25. abrahamr1991 thread starter macrumors newbie

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    #25
    I think it has become clear to me already hehe. Thank you very much
     

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