Programmable window blind assembly

摘要

A programmable window blind assembly includes a window blind device having a pull cord unit connected operably to a blind unit. A motor drive unit includes a bi-directional motor that has a drive shaft coupled to the pull cord unit such that rotation of the drive shaft can result in movement of the blind unit. A sensor unit generates motor rotation signals for indicating angular speed and angular displacement of the drive shaft. A programmable data storage device has blind position information stored therein. A processor controls the motor to operate in a first direction for moving the blind unit to a retracted position and in a second direction for moving the blind unit to an extended position. The processor is operable in a normal operating mode, where, based on the position information stored in the data storage device and the motor rotation signals from the sensor unit, the processor terminates operation of the motor in the first direction upon determining that the blind unit has reached the retracted position and terminates operation of the motor in the second direction upon determining that the blind unit has reached the extended position.