Apparatus and method of driving display device

A driving apparatus of a display device comprising:

• a panel driving unit that receives a panel voltage signal and an image signal from an external device, drives a display panel of the display device based on the panel voltage signal and the image signal, and generates an analog signal;
• an AND gate that receives a lighting start signal from the external control device, and outputs a lighting delay signal based on a logical product of the lighting start signal and the analog voltage;
• and
• a light driving unit that receives a light source voltage signal and a luminance control signal from the external control device, receives the lighting delay signal from the AND gate, starts an operation thereof based on the light source voltage signal and the lighting delay signal, and drives a light source of the display device based on the luminance control signal,
• wherein the lighting delay signal is configured to have the light driving unit start the operation thereof after a completion of a pre-display operation of the panel driving unit.

A method of driving a display device, the method comprising:

• receiving a panel voltage signal, an image signal, a lighting voltage signal, a luminance control signal and a lighting start signal from an external control device, wherein a display panel of the display device operates based on the panel voltage signal and the image signal, and a light source of the display device operates based on the lighting voltage signal, the luminance control signal, and the lighting start signal;
• reading panel information of the display panel;
• processing the image signal based on the read panel information to drive the display panel;
• generating a delay signal by delaying one of the luminance control signal and the lighting start signal by a time greater than or equal to a time for reading the panel information of the display panel;
• and
• supplying the display panel with light from the light source based on the delay signal.