Patent ID: 8314597

Claim:
A load driving apparatus, configured to output an electrical signal to a load, comprising: a driver, coupled to the load, for receiving an input voltage and a control signal and outputting an electrical signal, wherein the driver tunes the electrical signal according to the control signal; and an average voltage/current detector, coupled to the driver and the load, for receiving the electrical signal outputted to the load, and generating the control signal by comparing the electrical signal with a reference signal, wherein the electrical signal is a driving current, and the average voltage/current detector comprises: a current sensor, coupled to the load, configured to sense the driving current; a current-to-voltage converter, coupled to the current sensor, configured to convert the sensed driving current to a comparison voltage; and a comparator, coupled to the current sensor and the current-to-voltage converter, wherein the comparator compares the reference signal with the comparison voltage to generate the control signal.