A light source apparatus includes a light source which emits light, a response improving part which generates a response improving signal based on a first dimming control signal having a first rising period, a first operation part which generate a second dimming control signal which has the first rising period based on the first dimming control signal, a second operation part which generates a third dimming control signal by performing an arithmetic operation based on the second dimming control signal and the response improving signal, the third dimming control signal having a second rising period shorter than the first rising period and a light source driver which generates a light source driving signal based on the third dimming control signal to drive the light source based on the light source driving signal.