Patent ID: 8493296
Filing Date: 2013-07-23
Classification: G09G

Abstract:
1. A method of inspecting a defect for an electroluminescence display apparatus, wherein the display apparatus comprises, in each pixel, an electroluminescence element and an element driving transistor which is connected to the electroluminescence element and which controls a current flowing through the electroluminescence element, the method comprising: supplying a first inspection ON display signal, which sets the electroluminescence element to an emission level, to each pixel; operating the element driving transistor in a saturation operating region of the transistor; observing an emission state of the electroluminescence element; identifying a pixel having an emission brightness which is smaller than a reference brightness as an abnormal display defect pixel while the element driving transistor is operated in a saturation operating region of the transistor; supplying a second inspection ON display signal, which sets the electroluminescence element to an emission level, to each pixel; operating the element driving transistor in a linear operating region of the transistor; observing an emission state of the electroluminescence element; identifying a non-emission pixel as a dark spot defect pixel caused by the electroluminescence element; and identifying a pixel which is identified as the abnormal display defect pixel and which is not identified as the dark spot defect pixel as a dim spot defect pixel caused by the element driving transistor.