Patent ID: 9620046
Date: 2017-04-11
CPC Classifications: G01R,G09G

Claim:
1. A method of detecting a defect in an organic light-emitting display device, the method comprising: preparing the organic light-emitting display device comprising an organic light-emitting display panel which comprises a plurality of pixels, wherein each of the pixels comprises a driving transistor which operates in a saturation region or a transition region based on a potential difference between a source and a drain thereof and outputs a driving current, and an organic light-emitting diode which emits light based on the driving current; providing a plurality of voltages to the organic light-emitting display panel to operate the driving transistor in the transition region; and determining whether the organic light-emitting display device is defective based on an image, which is displayed on the organic light-emitting display panel based on data applied thereto, wherein a potential difference between the source and the drain when the driving transistor operates in the transition region is less than a potential difference between the source and the drain when the driving transistor operates in the saturation region, wherein the pixels are arranged substantially in a matrix form, and the determining of whether the organic light-emitting display device is defective comprises: calculating a gray deviation index of each of the pixels by adding differences between a gray value of the each of the pixels and gray values of neighboring pixels, which are separated on both sides from the each of the pixels by n pixels in row and column directions; detecting the number of pixels whose gray deviation indices are greater than a threshold value; and determining that the organic light-emitting display device is defective when the number of the pixels whose gray deviation indices are greater than the threshold value is equal to or greater than a reference value.