Patent ID: 8339335
Filing Date: 2012-12-25
Classification: G09G

Abstract:
1. A method of correcting a display variation for an electroluminescence display apparatus comprising, in each pixel, an electroluminescence element having a diode structure 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 an inspection ON display signal which sets the electroluminescence element to an emission level to each pixel; operating the element driving transistor in a saturation region; and detecting a current flowing through the electroluminescence element while the element driving transistor is operated in the saturation region; wherein a data signal to be supplied to a corresponding pixel is corrected based on a value of the current flowing through the electroluminescence element, wherein the current flowing through the electroluminescence element is a cathode current; wherein the driving transistor is configured to receive the data signal at a gate electrode and configured to control a current through the organic element in accordance with a voltage of the data signal; the cathode current is measured when one of the EL elements is set at the emission level by the inspection ON display signal as the data signal; the correction data for each pixel is obtained based on the measured cathode current by alternatively setting the one of the EL elements at the emission level; the correction data for each pixel is stored in a memory; the correction data for each pixel is used for correcting the data signal for each pixel; the corrected data signal for each pixel is supplied to the gate electrode of the driving transistor of a corresponding pixel; a plurality of adjacent pixels are set as the inspection target, at the same time the plurality of the adjacent pixels are in a same horizontal scan line; and a pixel of the plurality of adjacent pixels is set to be an inspection target consecutively for a plurality of times.