A display system includes a display panel of pixels, a gate driver and a compensation unit. The gate driver receives a control signal and based on the control signal, generates a gate signal to drive a transistor included in a pixel. The compensation unit measures and compensates for a fall time of the gate driver. The compensation unit includes a replica gate driver, a peak RMS detector, a comparator and a counter. The replica gate driver generates a replica gate signal based on the control signal. The peak RMS detector calculates a peak RMS of the replica gate signal. The comparator compares the peak RMS of the replica gate signal and a reference voltage and generates a comparator value. The counter is controlled by the comparator value to generate a compensation value used to adjust the gate driver and the replica gate driver. Other embodiments are also described and claimed.