3 ms·

So you think we should read 10 years of babbling by cranks who don’t like LED backlights on a support forum?

by ebbv 9y ago

walterbell 9y ago
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/
- aceoflolo 9y ago
  Why does the iPhone X need backlighting when it has an OLED screen?
  - walterbell 9y ago
    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&ie=UTF8&nv=1&prev=_t&rurl=translate.google.com&sl=ru&sp=nmt4&tl=en&u=http://www.ixbt.com/mobile/apple-iphone-x.html https://translate.google.com/translate?act=url&depth=2&hl=en...
  - rayiner 9y ago
    PWM is used to control the brightness level of each pixel.
aceoflolo 9y ago
You are very dismissive and impolite. I'm sure they are complaining about it not because they have nothing better to do.
- ebbv 9y ago
  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.
  - walterbell 9y ago
    Here's a summary from a vendor trying to compensate for the issue in software: https://iristech.co/pwm-flicker/ https://iristech.co/pwm-flicker/

So you think we should read 10 years of babbling by cranks who don’t like LED backlights on a support forum?

by ebbv 9y ago

So you think we should read 10 years of babbling by cranks who don’t like LED backlights on a support forum?

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/

aceoflolo 9y ago
Why does the iPhone X need backlighting when it has an OLED screen?
- walterbell 9y ago
  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&ie=UTF8&nv=1&prev=_t&rurl=translate.google.com&sl=ru&sp=nmt4&tl=en&u=http://www.ixbt.com/mobile/apple-iphone-x.html https://translate.google.com/translate?act=url&depth=2&hl=en...
- rayiner 9y ago
  PWM is used to control the brightness level of each pixel.

aceoflolo 9y ago

You are very dismissive and impolite. I'm sure they are complaining about it not because they have nothing better to do.

ebbv 9y ago
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.
- walterbell 9y ago
  Here's a summary from a vendor trying to compensate for the issue in software: https://iristech.co/pwm-flicker/ https://iristech.co/pwm-flicker/