Display apparatus and controlling method thereof

A controlling method of a display apparatus in which each pixel corresponds to one or more light-emitting elements, the method comprising:

• acquiring a first PWM signal having a duty corresponding to a grayscale of an input image, and a second PWM signal having the duty corresponding to the grayscale of the input image;
• driving one or more light-emitting elements corresponding to a first pixel, among the plurality of pixels, based on the first PWM signal;
• and
• driving one or more light-emitting elements corresponding to a second pixel, among the plurality of pixels, based on the second PWM signal,
• wherein a frequency of the first PWM signal is different from a frequency of the second PWM signal.

A processing apparatus comprising:

• a memory storing instructions;
• and
• at least one processor configured to execute the instructions to:
• obtain a first PWM signal for driving one or more light-emitting elements corresponding to a first pixel, among a plurality of pixels of a display, the first PWM signal having a duty corresponding to a grayscale of an input image, and
• obtain a second PWM signal for driving one or more light-emitting elements corresponding to a second pixel, among the plurality of pixels, the second PWM signal having the duty corresponding to the grayscale of the input image,
• wherein a frequency of the first PWM signal is different from a frequency of the second PWM signal.