Librem 5 Backlight PWM frequency

Well, it looks like you’ve got the purpose of my intention. But first and to be correct, with LG V20 measurable flicker was not detected at brightness levels of 90% and 100%. And it was 5.7 inches IPS with only 16M colors, with same (mentioned) resolution: 1440×2560 pixels. Therefore here (relativly outside of the PWM topic), let me clear up why I left 720p number(s): Vivante GC7000Lite GPU should support 720p60 directly over the MIPI DSI to the capacitive touch screen meaning (simplifying here) 720×2=1440 … resulting in much better 720p picture (and its color) reproduction (in short). To my understanding 1080p and higher resolutions will be projected over USB-C (without usage of Mini-HDMI). Is it 1440 pixels 5.7 IPS screen nowadays more expensive than 720 pixels 5.7 IPS screen? Resolution close to 720×1440 Rocktech JH057N00900 is 1440×2960 with almost identical 18.5:9 aspect ratio (instead of 2:1).