Patent ID: 8542166

Claim:
An electroluminescence display apparatus, comprising: a display section having a plurality of pixels arranged in a matrix, a variation detecting section which detects an inspection result of a display variation in each pixel, and a correcting section which corrects the display variation, wherein each of the plurality of pixels in the display section comprises an electroluminescence element having a diode structure, and an element driving transistor which is connected to the electroluminescence element and controls a current that flows through the electro luminescence element; wherein the variation detecting section comprises: an inspection signal generator which generates an inspection signal to be supplied to a pixel in a row to be inspected and supplies the inspection signal to the pixel in the inspected row at a predetermined timing during execution of a display in accordance with a video signal; a current detector which detects a current that flows through the electroluminescence element in response to the inspection signal; a memory section which stores a data corresponding to the current detected by the current detector; wherein the memory section includes a volatile primary memory which stores the data corresponding to the current supplied from the current detector, a non-volatile secondary memory which stores and maintains therein the data stored in the primary memory during when the apparatus power supply is turned off, and a selector which selectively supplies the data stored in the secondary memory to the primary memory when the apparatus power supply is turned on; wherein the correcting section executes a correction with respect to the video signal for each pixel in accordance with the data read out from the primary memory of the memory section; wherein during a blanking period, the inspection signal generator supplies, as the inspection signal to the pixel in the inspected row, an inspection ON signal and also an inspection OFF signal that sets the electroluminescence element to a non-emission level; a current detection amplifier detects an ON current obtained during application of the inspection ON signal and an OFF current obtained during application of the inspection OFF signal; and the memory section stores a data corresponding to a current difference between the detected ON current and OFF current; wherein the electroluminescence elements in the plurality of pixels have a common cathode; wherein the current detector detects cathode current at the common cathode; and wherein after inspection, the video signal that was previously supplied and used for driving the electroluminescence element is again supplied to the pixel that was inspected.