| 摘要 |
PURPOSE: An electric blind device, which automatically opens and closes a blind according to illumination angle, is provided to block sunlight by adjusting the opening and closing degree of the blind. CONSTITUTION: An electric blind device comprises an optical sensor group(100), a controller(120), a motor(130) and a blind(140). The optical sensor group comprises two or more optical sensors which are separated from a window. The controller controls the opening degree of the blind by driving a motor according to the total resistance value of the optical sensor group after detecting the total resistance value. The motor opens and closes the blind. The blind is installed in the circumference of the window. |
