Software LCD Overdrive BETA - Demo of Speeding Up Pixel Response On LCDs

Please turn OFF overdrive in your display to use this software-based overdrive instead of your display's own.

This TestUFO screen applies LCD overdrive in a GPU shader, similar to 2005's ATI Radeon LCD Overdrive. Pixels that change between refresh cycles are overshot past their target value, so a slow LCD lands closer to the correct color within one refresh cycle.

Compare the split screen: Bottom half is overdriven, top half is the original. Drag the divider to move it. Increase Overdrive Gain until ghosting is reduced. Too much overdrive creates inverse ghosting (coronas). Also, experiment with slightly reducing the contrast setting to add overdrive algorithm headroom below content black level and above content white level. If you're using higher Hz, try faster motion speeds to more easily see overdrive artifacts.

Benefits Overdriveless LCDs: This animation will benefit LCD screens that do not have overdrive, especially mobile and laptop LCD screens. In some cases, TestUFO's software-based overdrive can be superior to some obsolete 17x17 overdrive lookup tables from the 60 Hz era found in ancient research papers valid only for 60 Hz screens. Modern higher-Hz LCDs should ideally use better less-interpolated overdrive algorithms, or superior quadratic-regression curve-fitted algebraic overdrive algorithms, or color gamma-corrected overdrive algorithms.

Requires framerate = Hz: Software overdrive only works when every refresh cycle gets exactly one new frame, so stutters and frame skips will show as warnings. It does not help OLED or other instant-GtG displays, as those generally have no visible GtG ghosting to fix, so only inverse ghosting (coronas) will show up on OLED.