Why Phone Screens Burn In (And LCDs Don't)

Your lock screen shows a keyboard that is not there. You did not scratch the glass. You wore out the light. That ghost is burn-in. OLED pixels are tiny chemical lamps. Use some more than others and the grid remembers the UI. LCD is a shared flashlight with shutters — it forgets. The MS Paint Engineer opens the panel: • Why OLED black is actually off, and LCD black still leaks • How organic pixels age, and why static icons burn in • Pixel shift, dark mode, and always-on clocks • PWM flicker: dimming by blinking • Why blue dies first, and what you can actually do Next time a keyboard ghosts the glass, remember: those were tired little lamps keeping a timesheet. Subscribe if you want the next machine taken apart. #oled #lcd #burnin #smartphone #howitworks #engineering #mspaintengineer #display #pwm