| 摘要 |
Disclosed are an optical touch input device which divisionally adjusts optical output of a light emitting unit before and during a touch operation to reduce power consumption, and a driving method thereof, the optical touch input device includes a display panel, a plurality of infrared light emitting elements disposed on two adjacent sides of the display panel, a lens unit disposed on the remaining two adjacent sides of the display panel and reflecting light emitted from the infrared light emitting elements, a light receiving unit disposed on the two adjacent sides of the display panel, and a touch control unit including a touch coordinate calculation unit to calculate a set of coordinates of a touch point and a light emission control unit to divide optical outputs of the infrared light emitting elements into optical output during touch and optical output during non-touch and to lower the optical output during non-touch. |
