Display device and control method utilizing the same

An electronic system, comprising:

• an indicator device having a first light-spot, and
• a display device comprising:
• a first camera detecting the first light-spot for generating a first detection signal;
• a panel displaying a cursor;
• and
• a processing unit controlling the cursor according to the first detection signal, wherein when the distance between the first camera and the first light-spot is a first length and the moving distance of the first light-spot is a first distance, the moving distance of the cursor is a second distance, and when the distance between the first camera and the first light-spot is a second length and the moving distance of the first light-spot is the first distance, the moving distance of the cursor is the second distance.

A control method for a display device displaying a cursor, comprising:

• detecting a first light-spot to generate a first detection signal;
• and
• controlling the cursor according to the first detection signal,
• wherein when the distance between the display device and the first light-spot is a first length and the moving distance of the first light-spot is a first distance, the moving distance of the cursor is a second distance, and when the distance between the display device and the first light-spot is a second length and the moving distance of the first light-spot is the first distance, the moving distance of the cursor is the second distance.