Control method, detection device, and display device

A detection device configured to emit light toward a display surface to detect an irradiation position of the light, comprising:

• an emission section configured to emit the light;
• a determination section configured to determine whether or not the irradiation position of the light in the display surface is located in a target area based on imaging data generated by imaging the display surface;
• and
• a direction control section configured to control an emission direction of the light to a direction of moving the irradiation position toward the target area when the determination section determines that the irradiation position is not located in the target area, wherein
• the direction control section sets an amount of movement of the irradiation position toward the target area by control of the emission direction of the light larger when the irradiation position is located in a first region different from the target area compared to when the irradiation position is located in a second region between the target area and the first region.