Display device

A display device comprising:

• a plurality of display pixels configured to emit light at a luminance corresponding to a data signal;
• at least one auxiliary pixel configured to store an auxiliary voltage;
• a gate driver configured to supply a gate signal to the plurality of display pixels and the at least one auxiliary pixel;
• a sensing circuit configured to sense a change in the auxiliary voltage stored in the at least one auxiliary pixel for each frame, and to generate compensation voltage is information;
• a timing controller configured to change a gradation of an image signal inputted from an external device according to the compensation voltage information generated by the sensing circuit, and to generate image data;
• and
• a data driver configured to convert the image data into the data signal, and supply an auxiliary voltage having a preset value to the at least one auxiliary pixel.

A method for preventing flicker in a liquid crystal display device, the method including:

• providing in a display area of the liquid crystal display device, a plurality of display pixels that emit light at a luminance corresponding to a data signal of a current frame, and in at least one of a non-display area and display area of the liquid crystal display device, at least one auxiliary pixel that stores an auxiliary voltage;
• converting an image signal inputted from an external device into image data, and generating a driving voltage control signal that controls a driving voltage in correspondence with a compensation voltage information provided by a sensing circuit that is connected at least with the at least one auxiliary pixel and a timing controller;
• comparing a leakage current of at least one auxiliary pixel during a previous frame with a leakage current of the current frame, in which the auxiliary pixel is configured to store an auxiliary voltage;
• and
• adjusting a compensation voltage that is applied to a voltage generation unit, when the comparing of the leakage current indicates that the luminance of the plurality of the display pixels is outside of a threshold range.