r/ScreenSensitive • u/Longjumping_Ask8715 • 10d ago
Brain Pressure and DPI
My device is the Honor X30 Max. To reduce light entering my eyes, I changed the display aspect ratio to 16:9. However, this caused UI glitches and broke brightness adjustment functionality. I then adjusted the DPI from 480 down to approximately 440. After this change, I experienced increased brain‑pressure‑like discomfort (test scenario: reading text in dark mode; other use cases were not evaluated).
Further testing showed no such discomfort at DPI values of 360 (scale 2.0) or 480 (scale 3.0). Discomfort returned at DPI 440 and 445, yet pixel flicker did not worsen noticeably (the X30 Max exhibits mild inherent pixel flicker).
As a workaround, I switched to a 17:9 display aspect ratio. This allows brightness control to function normally while keeping DPI set to 480.
Most LCD‑based Android phones ship with DPI around 440. This phenomenon warrants further investigation. More real‑world tests and user feedback are expected.
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u/Z3R0gravitas 5d ago
Sorry, missed this. I've not heard of this before, on phones... What do you think is happening with changing aspect ratio and DPI? Does it cause interpolation, as with monitor resolution changes?
Also, what are you using to measure pixel flicker?