Light source device and endoscope system

An endoscope system that inserts an endoscope into an observation target and acquires an image of an object, the endoscope system comprising:

• a plurality of semiconductor light emitting elements that emit light beams having different wavelength bands from each other;
• an image sensor that irradiates the object with illumination light and detects reflected light from the object to generate an image signal;
• a processor that processes the image signal to generate the image of the object and displays the image on a monitor;
• a main control unit that generates a control signal for controlling a light emission profile of the plurality of semiconductor light emitting elements on the basis of the image signal;
• and
• a light source control unit that receives the control signal from the main control unit and drives the plurality of semiconductor light emitting elements with a drive signal according to the light emission profile,
• wherein the light emission profile includes a strong light emission period in which light emission is performed with a predetermined light intensity and a weak light emission period in which light emission is performed with a light intensity weaker than the predetermined light intensity, and
• the main control unit determines the light emission profile by executing a restoration control process of converting a light emission amount in the weak light emission period into a light emission amount in the strong light emission period while maintaining a total amount of the light emission amount in the strong light emission period and the light emission amount in the weak light emission period constant.