POV display device and control method therefor

A rotatable display device comprising a fixed portion and a rotary portion rotating relative to the fixed portion,

• wherein the rotary portion includes:
• a rotating frame connected to the fixed portion and rotating;
• a light source module disposed on the rotating frame and including at least one panel;
• a first sensor for sensing a rotational speed and a phase of the rotary portion;
• and
• an image output controller configured to control output of an image using the light source module using first sensed values obtained via the first sensor,
• wherein the fixed portion includes:
• a fixed frame constituting a main body thereof;
• a motor disposed on the fixed frame and rotationally driving the rotating frame;
• a second sensor for sensing the rotational speed and the phase of the rotary portion;
• and
• a motor controller configured to control at least one of a rotational speed and a phase of the motor using second sensed values obtained via the second sensor, and
• wherein the motor controller is configured to compare a speed input value of the motor with a speed measured value of the motor obtained via the second sensor to perform constant speed control of the motor with a speed corrected value of the motor.