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A comment on Eye Strain from LED Backlighting in MacBook Pro (2008). Parent comment

Re:Eye Strain from LED Backlighting in MacBook Pro (2008) by ebbv on Saturday January 06, 2018 @06:03PM (#16087991)
Nope, as far as I can see there is no reason for this to get posted. Seems almost like OP is trolling for karma because it has a controversial title and links to Apple.com.
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Re:Eye Strain from LED Backlighting in MacBook Pro (2008) by walterbell on Saturday January 06, 2018 @06:28PM (#16088084)
The thread is 164 pages long and active through 2017.
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Re:Eye Strain from LED Backlighting in MacBook Pro (2008) by ebbv on Saturday January 06, 2018 @06:30PM (#16088088)
So you think we should read 10 years of babbling by cranks who don’t like LED backlights on a support forum?
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Re:Eye Strain from LED Backlighting in MacBook Pro (2008) by walterbell on Saturday January 06, 2018 @06:37PM (#16088117)
A statement from Apple would be best, for an issue that has affected customers for nine years.

PWM backlighting was introduced on the iPhone X and is affecting some customers.

edit: s/backlighting/OLED dimming/

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Re:Eye Strain from LED Backlighting in MacBook Pro (2008) by aceoflolo on Saturday January 06, 2018 @06:37PM (#16088125)
Why does the iPhone X need backlighting when it has an OLED screen?
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Re:Eye Strain from LED Backlighting in MacBook Pro (2008) by walterbell on Saturday January 06, 2018 @06:49PM (#16088173)
Maybe someone who knows more about AMOLED panels can comment about the role of PWM? It seems to be something other than brightness control, the article at [1] says:

At any level of brightness, modulation with a frequency of approximately 60 or 240 Hz is present ... It can be seen that the amplitude of the modulation is not very large at the maximum and near to it brightness, as a result there is no visible flicker. However, with a strong decrease in brightness, modulation appears with a large relative amplitude, its presence can already be seen in the test for the presence of a stroboscopic effect or simply with rapid eye movement. Depending on the individual sensitivity, such flicker can cause increased fatigue."

[1] https://translate.google.com/translate?act=url&depth=2&hl=en...

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Re:Eye Strain from LED Backlighting in MacBook Pro (2008) by rayiner on Saturday January 06, 2018 @07:04PM (#16088233)
PWM is used to control the brightness level of each pixel.
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Re:Eye Strain from LED Backlighting in MacBook Pro (2008) by aceoflolo on Saturday January 06, 2018 @06:37PM (#16088118)
You are very dismissive and impolite. I'm sure they are complaining about it not because they have nothing better to do.
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Re:Eye Strain from LED Backlighting in MacBook Pro (2008) by ebbv on Saturday January 06, 2018 @06:42PM (#16088147)
Dude I don’t doubt they care about this issue. My point is I’m not gonna read 168(!) pages of posts about it. Post a single article summarizing the issue or something.
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Re:Eye Strain from LED Backlighting in MacBook Pro (2008) by walterbell on Saturday January 06, 2018 @06:45PM (#16088157)
Here's a summary from a vendor trying to compensate for the issue in software: https://iristech.co/pwm-flicker/
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