Display apparatus

A display apparatus, comprising:

• a display panel in which pixels are arranged along a plurality of horizontal lines;
• a data driving portion which converts image data of the pixels into data voltages and outputs the data voltages to the display panel;
• a frame memory which receives and stores the image data of a refresh frame from a host;
• a data processing portion which receives and image quality-processes the image data stored in the frame memory in a unit of one horizontal line, and transmits the image quality-processed image data to the data driving portion and the frame memory;
• a first power switch which switches power of the data processing portion;
• a first transfer switch which switches transmission path between the frame memory and the data driving portion;
• a second transfer switch which switches transmission path between the frame memory and an input terminal of the data processing portion;
• and
• a third transfer switch which switches transmission path between an output terminal of the data processing portion, and the data driving portion and frame memory,
• wherein the frame memory updates and stores the image data of the horizontal line image quality-processed into a corresponding horizontal line therein, and
• wherein image data of a nth refresh frame updated in the frame memory are transmitted to the data driving portion in a unit of one horizontal line when an image of a n+1th refresh frame is identical to an image of the nth refresh frame.