Patent ID: 8299725

Claim:
A driver for driving a light emitting device, comprising: an output stage, coupled to a first reference voltage, for outputting a driving current to the light emitting device according to a driving signal, wherein the light emitting device is coupled between the output stage and a second reference voltage different from the first reference voltage; and a driving stage, coupled to a third reference voltage and a fourth reference voltage, for generating the driving signal to the output stage, wherein one of the third reference voltage and the fourth reference voltage is within a range between the first reference voltage and the second reference voltage, and the other of the third reference voltage and the fourth reference voltage is outside the range between the first reference voltage and the second reference voltage, and the driving stage comprises: a first driving unit, coupled to the third reference voltage and a fifth reference voltage, for receiving an input signal and generating a first driving signal according to the input signal; a second driving unit, coupled to the fourth reference voltage and the fifth reference voltage, for receiving the input signal and generating a second driving signal according to the input signal, wherein the fifth reference voltage is between the third reference voltage and the fourth reference voltage; and a combiner, coupled to the first driving unit and the second driving unit, for generating the driving signal by combining the first driving signal and the second driving signal.