Driving circuit and driving method therefor, and vehicle lamp

A driving method for a driving circuit, wherein the driving method is used for driving a driving circuit, the driving circuit is configured to drive a plurality of light-emitting units to emit light, and the driving circuit comprises:

• a voltage regulation circuit, configured to regulate a driving voltage of a light-emitting unit according to a voltage regulation signal;
• a processing chip, configured to provide the voltage regulation signal to the voltage regulation circuit to reduce a difference between a reference current and a driving current of the light-emitting unit under a turned-on state;
• wherein the processing chip is further configured to output serial data for controlling the plurality of light-emitting units to be turned off or turned on;
• and
• a serial-to-parallel chip, comprising an input end and a plurality of output ends, wherein the input end of the serial-to-parallel chip is configured to receive the serial data, and the serial-to-parallel chip is configured to convert the serial data into parallel data and output the parallel data through the plurality of output ends of the serial-to-parallel chip;
• wherein, an output end of the serial-to-parallel chip and the light-emitting unit are correspondingly provided, and the parallel data output at the output end of the serial-to-parallel chip is used for controlling a corresponding light-emitting unit to be turned off or turned on;
• the output end of the serial-to-parallel chip is configured to provide a driving voltage to a light-emitting unit corresponding to the output end of the serial-to-parallel chip;
• and
• the voltage regulation circuit is configured to provide a power supply voltage to the serial-to-parallel chip, and the power supply voltage of the serial-to-parallel chip is positively correlated with a voltage of the output end of the serial-to-parallel chip within a voltage upper limit range output at the output end of the serial-to-parallel chip,
• wherein the driving method comprises:
• providing the voltage regulation signal to the voltage regulation circuit by using the processing chip;
• and
• regulating the driving voltage of the light-emitting unit according to the voltage regulation signal by using the voltage regulation circuit to reduce the difference between the reference current and the driving current of the light-emitting unit under the turned-on state.

A vehicle lamp, comprising a plurality of light-emitting units and a driving circuit, wherein the driving circuit is configured to drive the plurality of light-emitting units to emit light, and the driving circuit comprises:

• a voltage regulation circuit, configured to regulate a driving voltage of a light-emitting unit according to a voltage regulation signal;
• a processing chip, configured to provide the voltage regulation signal to the voltage regulation circuit to reduce a difference between a reference current and a driving current of the light-emitting unit under a turned-on state, wherein the processing chip is further configured to output serial data for controlling the plurality of light-emitting units to be turned off or turned on;
• and
• a serial-to-parallel chip, comprising an input end and a plurality of output ends, wherein the input end of the serial-to-parallel chip is configured to receive the serial data, and the serial-to-parallel chip is configured to convert the serial data into parallel data and output the parallel data through the plurality of output ends of the serial-to-parallel chip;
• wherein, an output end of the serial-to-parallel chip and the light-emitting unit are correspondingly provided, and the parallel data output at the output end of the serial-to-parallel chip is used for controlling a corresponding light-emitting unit to be turned off or turned on;
• the output end of the serial-to-parallel chip is configured to provide a driving voltage to a light-emitting unit corresponding to the output end of the serial-to-parallel chip;
• and
• the voltage regulation circuit is configured to provide a power supply voltage to the serial-to-parallel chip, and the power supply voltage of the serial-to-parallel chip is positively correlated with a voltage of the output end of the serial-to-parallel chip within a voltage upper limit range output at the output end of the serial-to-parallel chip.