System and method for adjusting current of luminous diode

The invention discloses a system and a method for adjusting current of a luminous diode. The system for adjusting the current of the luminous diode comprises a system controller, an inductor, a first resistor, a switch and a first diode. The system controller comprises a first controller terminal and a grounding terminal, and the system controller is configured at the terminal position of the first controller to output a drive signal. The inductor comprises a first inductor terminal and a second inductor terminal, the first inductor terminal is connected to the grounding terminal in a coupling mode, and the second inductor is connected to one luminous diode or multiple luminous diodes in a coupling mode. The first resistor comprises a first resistor terminal and a second resistor terminal, and the first resistor terminal is connected to the grounding terminal in a coupling mode. The switch is configured for receiving the drive signal and is connected to the second resistor terminal in a coupling mode. The first diode comprises a first diode terminal and a second diode terminal and is connected to the first resistor in a coupling mode.