Method and apparatus for calculating duty cycle of lighting, terminal, and storage medium

An apparatus, comprising:

• a non-transitory memory storing a computer program;
• and
• one or more processors in communication with the memory, wherein the computer program, when executed by the one or more processors, causes the apparatus to perform:
• determining a first expression formula of a chromaticity coordinate, a luminous flux and an input duty cycle of each path of three paths of a RGB color light source;
• calibrating, based on the first expression formula and tristimulus values of the three paths of the RGB color light source under a full current operation, a nonlinear transformation of the luminous flux, to obtain a first duty cycle value of the each path of the three paths of the RGB color light source, the first duty cycle value being obtained in consideration of the luminous flux variable with different duty cycle values;
• calibrating, based on the first duty cycle value and the first expression formula, a nonlinear transformation of the chromaticity coordinate, to obtain a second duty cycle value of the each path of the three paths of the RGB color light source, the second duty cycle value being obtained in consideration of the luminous flux and the chromaticity coordinate variable with the different duty cycle values;
• and
• controlling displaying colors of the RGB color light source based on the second duty cycle value.