| 摘要 |
PURPOSE: An optical input device through directivity light source is provided to increase precision and to reduce malfunction probability through the directivity light source. CONSTITUTION: A circuit board(110) includes an optical sensor(112) sensing the light. A first light blocking unit(130) guides the light outputted from a directivity light source(120) to the optical sensor. A lens(140) is inserted into the first light blocking unit. A second light blocking unit(150) controls the quantity of the light. The second light blocking unit includes an opening unit for reaching the light of the light source. The first light blocking unit includes a blocking wall for blocking the light. |
