Patent ID: 11961270
Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. An air screen detector device comprising:
a display configured to display an air screen image in one direction using visible light;
an infrared light source disposed on the display to provide infrared light in the same direction as that of the visible light;
an infrared image sensor disposed on one side of the display and the infrared light source to receive the infrared light reflected by a finger provided in the air screen image disposed on the other side of the infrared light source;
a first multifocal lens disposed between the infrared image sensor and the infrared light source to provide the infrared light to the infrared image sensor; and
a visible light filter disposed between the first multifocal lens and the infrared image sensor to remove the visible light.