Patent ID: 9121914
Filing Date: 2015-09-01
Classification: G01R,G09G,H01L

Abstract:
1. A defect detection method performed with respect to an organic electroluminescence (EL) element including a first electrode, a second electrode, a functional layer, and a light-emission layer, the functional layer and the light-emission layer disposed between the first electrode and the second electrode, the method comprising: applying a first voltage between the first electrode and the second electrode, the first voltage, when the organic EL element includes a defective portion, between the first electrode and the second electrode, that is a potential cause of non-light emission of the light-emission layer, reducing an electrical resistance of a first portion of the functional layer, the first portion being a portion of the functional layer corresponding to the defective portion; and applying, after the application of the first voltage, a second voltage between the first electrode and the second electrode and thus detecting whether or not the organic EL element is a dark spot, the second voltage, when the organic EL element does not include the defective portion, causing the light-emission layer to emit light, the dark spot being an organic EL element whose light-emission layer does not emit light, wherein, in the applying of the first voltage, a first current is applied until the electrical resistance of the first portion is reduced to lower than an electrical resistance of a second portion of the functional layer when the organic EL element includes the defective portion, the second portion being a portion of the functional layer not corresponding to the defective portion.