Display driving apparatus and method capable of controlling pixel brightness

Abstract

A display driving apparatus according to an embodiment of the disclosure includes: a pixel driving circuit connected to each of a plurality of light-emitting diodes (LEDs) forming at least one row and column and configured to drive the LEDs in a pulse width modulation (PWM) method; a controller configured to determine a PWM duty ratio (PWM On-duty) indicating a light emitting time period of the LED during one frame section; and a timing controller configured to generate a first clock signal according to the PWM duty ratio and supply the first clock signal to the pixel driving circuit in a row or column unit through a shift register, wherein, when the PWM duty ratio is changed, the timing controller is configured to generate a second clock signal matching the changed PWM duty ratio, and selectively supply the first clock signal or the second clock signal to the pixel driving circuit.