Patent ID: 7714518
Filing Date: 2010-05-11
Classification: H05B

Abstract:
1. A ballast comprising: a drive circuit comprising an adaptive non-overlap timer, a driver, and a drive controller, the driver being configured for generating a drive signal on receiving a power signal; a half-bridge inverter for generating a power AC signal according to the drive signal generated by the driver, the power AC signal being fed back to the drive circuit, the power AC signal being used for determining a non-overlap time of the drive signal; a transformer for generating a high frequency signal based on the power AC signal, the high frequency signal being configured for lightening a lamp, and maintaining the lightening of the lamp; and a filter for filtering out noise in the feedback power AC signal; wherein the adaptive non-overlap timer is configured for determining a non-overlap time according to the filtered feedback power AC signal, and the drive controller is used for controlling the non-overlap time of the drive signal according to the determined non-overlap time.