Electroluminescence display apparatus

An electroluminescence display apparatus, comprising:

• a display section having a plurality of pixels arranged in a matrix, and a driving section which controls operation of the display section in accordance with a video signal;
• wherein
• the driving section comprises a driver which carries out row-direction drive and column-direction drive of the display section, 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;
• each of the plurality of pixels in the display section comprises an electroluminescence element, and an element driving transistor which is connected to the electroluminescence element and controls a current that flows through the electroluminescence element;
• in the display section, a plurality of power supply lines for supplying power to electrodes of the electroluminescence elements in the respective pixels are provided along the column direction of the matrix;
• 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, a current detection amplifier which detects a current that flows through the electroluminescence element, and an analog-digital converter which converts an analog current detection signal from the current detection amplifier into a digital signal;
• the current detection amplifier is configured to provide one current detection amplifier in correlation to multiple columns of the matrix;
• wherein a plurality of the current detection amplifier is provided, and each current detection amplifier is connected to the power supply lines;
• and, during a blanking period, a pixel in a predetermined inspected row is selected by the driver, and a current that flows through the electroluminescence element when an inspection ON signal which serves as the inspection signal and sets the electroluminescence element to an emission level is supplied to the selected pixel is detected by the current detection amplifier via the corresponding power supply line;
• the analog-digital converter is configured to provide one successive approximation type analog-digital converter in correlation to the multiple columns in a manner corresponding to the current detection amplifier, wherein a plurality of the analog-digital converter is provided, each analog-digital converter comprising a comparator which compares the analog current detection signal from the current detection amplifier with a reference signal, a successive approximation register which successively changes a data value from higher-order bit side taking into account a comparison signal from the comparator and supplies the changed value to a digital-analog converter, and the digital-analog converter converts a digital signal from the successive approximation register into an analog signal and supplies the converted analog signal as the reference signal to the comparator;
• and
• the digital-analog converter is commonly shared by a plurality of the analog-digital converters.