Patent ID: 7112929
Filing Date: 2006-09-26
Classification: H05B,Y02B,Y10S

Abstract:
1. A controller for driving a switching network in a backlight inverter, the controller comprising: a first output configured to provide a first driving signal with periodic active and inactive states, wherein the first driving signal has a variable duty-cycle that determines relative durations of the active and the inactive states; a second output configured to provide a second driving signal, wherein the second driving signal has a substantially identical duty-cycle as the first driving signal and active states of the second driving signal are phase shifted by approximately 180° with respect to the active states of the first driving signal; a third output configured to provide a third driving signal that substantially follows the first driving signal with opposite states and transition overlaps such that the third driving signal transitions from an active state to an inactive state before the first driving signal transitions from an inactive state to an active state and the third driving signal transitions from an inactive state to an active state after the first driving signal transitions from an active state to an inactive state; and a fourth output configured to provide a fourth driving signal that substantially follows the second driving signal with opposite states and transition overlaps such that the fourth driving signal transitions from an active state to an inactive state before the second driving signal transitions from an inactive state to an active state and the fourth driving signal transitions from an inactive state to an active state after the second driving signal transitions from an active state to an inactive state.