LED drive circuit using return converter to reduce observable optical flicker by reducing rectified ac ripple networks

摘要

Summary "led drive circuit using return converter to reduce observable optical flicker by reducing ac rectified ripple networks" This application describes a drive circuit for supplying a command current to a led lighting scheme. In particular, the present invention relates to an ac input controller circuit operable in conjunction with a current regulating device utilizing a plurality of zener diodes connected in parallel combinations. The drive circuit comprises a feedback mechanism that can be operated to maintain a constant voltage throughout the current regulator. Embodiments of the present invention seek to resolve led ripple and thus optical flickering from a LED drive connected at its input to an alternating current supply.