07-22-2019, 02:01 PM
(This post was last modified: 07-22-2019, 02:02 PM by User 12559.)
I have already written all the details in the „Tick Tock goes the clock“ thread in the news forum, so I‘ll go with the short version here. If you need more information, links or whatever, feel free to ask.
At the time of the July update, I already asked Lukasz for this, who gave me a very detailed specsheet of the IPS panel from BOE used (6 bit colours, 800:1 contrast ratio, 250 nits (cd/m2) brightness, so do not expect anything amazing that will blow you away) on IRC. However, it stated that the PWM frequency could be anything between 200 and 10000 Hz (so anything from terrible to amazing), and reviews of laptops with the same panel showed that it was indeed not dependent on the panel, but rather on the laptop, with devices between 200 and 1000 Hz (the latter one being still suboptimal). All this lead me to the conclusion that the brightness controller is not fixed to the panel and depends on the device manufacturer, in this case Pine64. That means that there should be some hardware engineer (or so) who knows whether it is an analog (which I wouldn‘t mind) or PWM (which I also wouldn‘t mind, if the frequency is high enough) brightness controller, and, if it is the latter one, at which frequency it operates (or who is at least able to find out). If you are such a person, I would be thankful if you could answer my question. I suppose this is a better subforum than where I originally asked.
At the time of the July update, I already asked Lukasz for this, who gave me a very detailed specsheet of the IPS panel from BOE used (6 bit colours, 800:1 contrast ratio, 250 nits (cd/m2) brightness, so do not expect anything amazing that will blow you away) on IRC. However, it stated that the PWM frequency could be anything between 200 and 10000 Hz (so anything from terrible to amazing), and reviews of laptops with the same panel showed that it was indeed not dependent on the panel, but rather on the laptop, with devices between 200 and 1000 Hz (the latter one being still suboptimal). All this lead me to the conclusion that the brightness controller is not fixed to the panel and depends on the device manufacturer, in this case Pine64. That means that there should be some hardware engineer (or so) who knows whether it is an analog (which I wouldn‘t mind) or PWM (which I also wouldn‘t mind, if the frequency is high enough) brightness controller, and, if it is the latter one, at which frequency it operates (or who is at least able to find out). If you are such a person, I would be thankful if you could answer my question. I suppose this is a better subforum than where I originally asked.
