A display apparatus is provided. The display apparatus according to an embodiment includes an LED module including a plurality of light emitting diodes, an LED driver including a switching element comprising switching circuitry, the LED driver being configured to change a switching frequency of the switching element based on an intensity of a current provided to the LED module, and a processor configured to generate a Pulse Width Modulation (PWM) dimming signal based on pixel information of an input image and provide the signal to the LED driver, wherein the processor is further configured to control the LED driver to increase the switching frequency of the switching element within a dimming duty of the PWM dimming signal by reducing the intensity of the current provide to the LED module based on a pixel value of the input image being less than a threshold value.