Systems and methods for intelligent control related to TRIAC dimmers

A system controller for a lighting system, the system controller comprising:

• a first controller terminal configured to receive a first signal;
• and
• a second controller terminal configured to output a second signal to a driver component, the driver component being configured to receive a first current and provide one or more drive currents to one or more light emitting diodes in response to the second signal;
• wherein the system controller is configured to:
• process information associated with the first signal;
• determine a first time period for the first signal to increase from a first threshold to a second threshold;
• and
• determine a second time period for the first signal to decrease from the second threshold to the first threshold;
• wherein the system controller is further configured to:
• in response to the second time period minus the first time period being larger than a predetermined positive value, determine the first signal to be associate with a leading-edge TRIAC dimmer;
• in response to the first time period minus the second time period being larger than the predetermined positive value, determine the first signal to be associate with the trailing-edge TRIAC dimmer;
• and
• in response to an absolute value of the first time period minus the second time period being smaller than the predetermined positive value, determine the first signal not to be associated with any TRIAC dimmer.