Patent ID: 9039207
Filing Date: 2015-05-26
Classification: G03B,G09G,H04N

Abstract:
1. A method comprising: providing a first input device; providing a second input device; providing a sensor for determining a rotational speed of the second input device; providing a control device for the second input device, the control controlling the rotational speed of the second input device; providing a phase locked loop (PLL); creating a phase reference signal based on a signal rate of the first input device; creating a phase feedback signal based on the rotational speed of the second input device as measured by the sensor; comparing, by the PLL, the phase reference signal and the phase feedback signal to determine whether the first input device and the second input device are synchronized; and sending, by the PLL, a signal to the control device for the second input device to change the rotational speed of the second input device responsive to determining that the first input device and the second input device are not synchronized.