Abstract: A light-emitting diode (LED) driver is provided to drive an LED. The LED driver includes a clock supply to periodically output a modulation period. A brightness controller is provided to receive brightness data corresponding to the desired brightness of the LED. The brightness controller generates a pulse-width-modulated (PWM) duty pulse within the modulation period, a width of the PWM duty pulse being based on the brightness data. The LED driver also includes a detection controller to receive detection data indicating whether the LED is to be detected during the modulation period. When the detection data indicate that the LED is to be detected during the modulation period, the detection controller generates a detection pulse within the modulation period. A driver output is provided to output the PWM duty pulse and the detection pulse to the LED within the modulation period.