Why does my iPhone screen wake up randomly when it's just sitting flat on a table?

Even when my iPhone is lying completely flat on a desk without being touched, the lock screen continuously lights up every few minutes without ringing or making a sound.

Is this ghostly screen activation caused by hidden "Lock Screen Widgets" constantly refreshing background data, hyper-sensitive accelerometer triggers in "Raise to Wake," persistent background notification banners, or Always-On Display settings? What is the step-by-step fix to keep the display completely dark until I manually tap it? Check our hardware diagnostics at iphones.pk Display & Sensor Services.