Patent ID: 7635018

Claim:
A method for controlling a roller shade having a rotatably supported roller tube windingly receiving a flexible shade fabric, the method comprising: storing in a memory information representative of a desired linear speed of a lower end of the shade fabric; providing a motor having a rotatably driven output shaft operably connected to the roller tube for rotating the roller tube; rotating the roller tube to move the lower end of the shade fabric; receiving a control signal representative of a rotational position of the roller tube; determining a number of rotations of the roller tube required to move the lower end of the shade fabric between a default position and a current position in response to the control signal; and controlling a rotational speed of the motor as a function of the desired linear speed and the number of rotations required to move the lower end of the shade fabric between the default position and the current position, so as to control a linear speed of the lower end of the shade fabric to the desired linear speed.