Display device and driving method thereof

A display device and a driving method thereof are disclosed. In a defective sub-pixel detection time for detecting a defective sub-pixel, the gate driving circuit may supply an ON signal to a 1-1 gate line group included in the plurality of gate lines and supply an OFF signal to a 1-2 gate line group other than the 1-1 gate line group among the plurality of gate lines, thereby rapidly detecting the defective sub-pixel. 公开了一种显示装置及其驱动方法。在用于检测缺陷子像素的缺陷子像素检测时间中，选通驱动电路可以向包括在多条选通线中的1-1选通线组供应导通信号，并且向多条选通线中的除了1-1选通线组之外的1-2选通线组供应关断信号，从而快速地检测缺陷子像素。